#!/usr/bin/env python3
"""
Interactive Bible verse embedding generator.

This script generates embeddings for Bible verses using various embedding models.
It supports both commercial APIs and open-source models.
"""

import os
# Fix OpenMP duplicate library issue
os.environ["KMP_DUPLICATE_LIB_OK"] = "TRUE"
# Note: Removed global offline mode to allow models with custom code (like nomic-ai) to work
# These models need to download custom tokenizers and configurations that aren't in standard transformers
# os.environ["HF_HUB_OFFLINE"] = "1"
# os.environ["TRANSFORMERS_OFFLINE"] = "1"

import json
import asyncio
from asyncio import Semaphore
from pathlib import Path
from typing import List, Dict, Any, Optional, Tuple
from abc import ABC, abstractmethod
import argparse
# Lazy import heavy libraries to avoid conflicts
# import numpy as np  # Will be imported in functions that need it
# import yaml  # Will be imported in functions that need it  
# import faiss  # Will be imported in functions that need it
import csv
from datetime import datetime




class EmbeddingProvider(ABC):
    """Abstract base class for embedding providers."""

    @abstractmethod
    def get_name(self) -> str:
        """Return the model name for file naming."""
        pass

    @abstractmethod
    async def embed_text(self, text: str) -> List[float]:
        """Generate embedding for a single text."""
        pass

    @abstractmethod
    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        """Generate embeddings for a batch of texts."""
        pass

    async def embed_query(self, query: str) -> List[float]:
        """Generate embedding for a query. Base implementation falls back to embed_text."""
        return await self.embed_text(query)


class OpenAIProvider(EmbeddingProvider):
    """OpenAI embedding provider."""

    def __init__(self, model_name: str = "text-embedding-3-small"):
        self.model_name = model_name
        self.client = None

    def get_name(self) -> str:
        return self.model_name

    async def _get_client(self):
        if self.client is None:
            from openai import AsyncOpenAI

            self.client = AsyncOpenAI()
        return self.client

    async def embed_text(self, text: str) -> List[float]:
        embeddings = await self.embed_batch([text])
        return embeddings[0]

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        client = await self._get_client()
        response = await client.embeddings.create(input=texts, model=self.model_name)
        # OpenAI embeddings are automatically normalized to unit length
        return [data.embedding for data in response.data]
    
    async def embed_queries_batch(self, queries: List[str], batch_size: int = 100) -> List[List[float]]:
        """Efficiently embed multiple queries using OpenAI's batch API capability."""
        all_embeddings = []
        
        # Process in batches to respect API limits
        for i in range(0, len(queries), batch_size):
            batch = queries[i:i + batch_size]
            print(f"Embedding batch {i//batch_size + 1}/{(len(queries) + batch_size - 1)//batch_size} ({len(batch)} queries)")
            
            try:
                batch_embeddings = await self.embed_batch(batch)
                all_embeddings.extend(batch_embeddings)
            except Exception as e:
                print(f"Error in batch embedding: {e}")
                # Fall back to individual embedding for this batch
                for query in batch:
                    try:
                        embedding = await self.embed_text(query)
                        all_embeddings.append(embedding)
                    except Exception as e2:
                        print(f"Error embedding query '{query}': {e2}")
                        # Add zero embedding as placeholder
                        all_embeddings.append([0.0] * 1536)  # Default dimension for text-embedding models
        
        return all_embeddings


class GeminiProvider(EmbeddingProvider):
    """Google Gemini embedding provider."""

    def __init__(self, model_name: str = "text-embedding-004"):
        self.model_name = model_name
        self.client = None

    def get_name(self) -> str:
        return self.model_name

    async def _get_client(self):
        if self.client is None:
            import google.generativeai as genai

            self.client = genai
            genai.configure()
        return self.client

    async def embed_text(self, text: str) -> List[float]:
        embeddings = await self.embed_batch([text])
        return embeddings[0]

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        client = await self._get_client()
        result = client.embed_content(model=f"models/{self.model_name}", content=texts)
        
        # Gemini embeddings are automatically normalized to unit length
        # The result is a dictionary with an 'embedding' key containing the embedding vectors
        if isinstance(result, dict) and 'embedding' in result:
            embeddings = result['embedding']
            
            # Handle case where embeddings is a list of embedding vectors
            if isinstance(embeddings, list):
                # Check if we have multiple embeddings (batch) or a single embedding
                if len(embeddings) > 0:
                    # If first element is a list of numbers, we have direct embedding vectors
                    if isinstance(embeddings[0], (list, tuple)) and all(isinstance(x, (int, float)) for x in embeddings[0][:5]):
                        return embeddings
                    # If first element is a dict with 'embedding' key, extract them
                    elif isinstance(embeddings[0], dict) and 'embedding' in embeddings[0]:
                        return [emb['embedding'] for emb in embeddings]
                    # If first element is an object with embedding attribute
                    elif hasattr(embeddings[0], 'embedding'):
                        return [emb.embedding for emb in embeddings]
                    else:
                        # Assume it's a single embedding vector for all texts (unlikely but handle it)
                        return [embeddings] * len(texts)
                else:
                    return []
            # Handle case where embeddings is a single vector
            elif isinstance(embeddings, (list, tuple)):
                return [embeddings]
            else:
                return []
        else:
            raise ValueError(f"Unexpected Gemini API response format: {type(result)}")
    
    async def embed_queries_batch(self, queries: List[str], batch_size: int = 100) -> List[List[float]]:
        """Efficiently embed multiple queries using Gemini's batch capability."""
        all_embeddings = []
        
        for i in range(0, len(queries), batch_size):
            batch = queries[i:i + batch_size]
            print(f"Embedding batch {i//batch_size + 1}/{(len(queries) + batch_size - 1)//batch_size} ({len(batch)} queries)")
            
            try:
                batch_embeddings = await self.embed_batch(batch)
                all_embeddings.extend(batch_embeddings)
            except Exception as e:
                print(f"Error in batch embedding: {e}")
                # Fall back to individual embedding for this batch
                for query in batch:
                    try:
                        embedding = await self.embed_text(query)
                        all_embeddings.append(embedding)
                    except Exception as e2:
                        print(f"Error embedding query '{query}': {e2}")
                        # Add zero embedding as placeholder
                        all_embeddings.append([0.0] * 768)  # Default dimension for Gemini models
        
        return all_embeddings


class VoyageProvider(EmbeddingProvider):
    """Voyage AI embedding provider."""

    def __init__(self, model_name: str = "voyage-3"):
        self.model_name = model_name
        self.client = None

    def get_name(self) -> str:
        return self.model_name

    async def _get_client(self):
        if self.client is None:
            import voyageai

            self.client = voyageai.AsyncClient()
        return self.client

    async def embed_text(self, text: str) -> List[float]:
        embeddings = await self.embed_batch([text])
        return embeddings[0]

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        client = await self._get_client()
        response = await client.embed(texts, model=self.model_name)
        # Voyage AI embeddings are automatically normalized to unit length
        return response.embeddings
    
    async def embed_queries_batch(self, queries: List[str], batch_size: int = 100) -> List[List[float]]:
        """Efficiently embed multiple queries using Voyage's batch capability."""
        all_embeddings = []
        
        for i in range(0, len(queries), batch_size):
            batch = queries[i:i + batch_size]
            print(f"Embedding batch {i//batch_size + 1}/{(len(queries) + batch_size - 1)//batch_size} ({len(batch)} queries)")
            
            try:
                batch_embeddings = await self.embed_batch(batch)
                all_embeddings.extend(batch_embeddings)
            except Exception as e:
                print(f"Error in batch embedding: {e}")
                # Fall back to individual embedding for this batch
                for query in batch:
                    try:
                        embedding = await self.embed_text(query)
                        all_embeddings.append(embedding)
                    except Exception as e2:
                        print(f"Error embedding query '{query}': {e2}")
                        # Add zero embedding as placeholder
                        all_embeddings.append([0.0] * 1024)  # Default dimension for Voyage models
        
        return all_embeddings


class HuggingFaceProvider(EmbeddingProvider):
    """HuggingFace sentence-transformers provider."""

    def __init__(self, model_name: str):
        self.model_name = model_name
        self.model = None
        self.query_prompt_config = self._get_query_prompt_config()

    def get_name(self) -> str:
        # Convert model path to filename-safe format
        return self.model_name.replace("/", "-").replace("_", "-")
    
    def _get_query_prompt_config(self) -> dict:
        """Get query prompt configuration for specific models."""
        # Model-specific query prompt configurations
        if "Qwen3-Embedding" in self.model_name:
            return {
                "enabled": True,
                "prompt_name": "query",
                "instruction_template": "Instruct: Given a biblical passage, retrieve verses that are semantically related or answer the query\nQuery: {query}"
            }
        elif "inf-retriever-v1" in self.model_name:
            return {
                "enabled": True,
                "prompt_name": "query"
            }
        elif "jina-embeddings-v4" in self.model_name:
            return {
                "enabled": True,
                "prompt_name": "query",
                "task": "retrieval"
            }
        elif "e5-" in self.model_name.lower():
            # E5 models use "query: " and "passage: " prefixes for retrieval tasks
            return {
                "enabled": True,
                "query_prefix": "query: ",
                "document_prefix": "passage: "
            }
        # Add other model-specific configurations here as needed
        return {"enabled": False}

    def _get_model(self):
        if self.model is None:
            import os
            from sentence_transformers import SentenceTransformer

            # Get HuggingFace token from environment if available
            hf_token = os.getenv("HF_TOKEN") or os.getenv("HUGGINGFACE_HUB_TOKEN")
            
            # Some models require trust_remote_code=True and can't use local_files_only
            # because they need to load custom tokenizers and configurations
            if "jinaai" in self.model_name or "nomic-ai" in self.model_name:
                self.model = SentenceTransformer(
                    self.model_name, 
                    trust_remote_code=True,
                    token=hf_token
                    # Note: Cannot use local_files_only=True for models with custom code
                )
            else:
                # For standard models, try offline first, then online with token if needed
                try:
                    self.model = SentenceTransformer(
                        self.model_name,
                        local_files_only=True  # Force offline mode for standard models
                    )
                except Exception:
                    # If offline fails, try online with token
                    print(f"Model {self.model_name} not found offline, downloading...")
                    self.model = SentenceTransformer(
                        self.model_name,
                        token=hf_token
                    )
        return self.model

    async def embed_text(self, text: str) -> List[float]:
        model = self._get_model()
        
        # Apply document prefix for E5 models
        if self.query_prompt_config.get("enabled") and "document_prefix" in self.query_prompt_config:
            prefixed_text = self.query_prompt_config["document_prefix"] + text
            embedding = model.encode([prefixed_text], normalize_embeddings=True)[0]
        elif self.query_prompt_config.get("enabled") and "prompt_name" in self.query_prompt_config and "jina-embeddings-v4" in self.model_name:
            # For jina v4, use prompt_name="passage" for documents
            encode_kwargs = {
                "normalize_embeddings": True, 
                "prompt_name": "passage"
            }
            if "task" in self.query_prompt_config:
                encode_kwargs["task"] = self.query_prompt_config["task"]
            
            embedding = model.encode([text], **encode_kwargs)[0]
        else:
            embedding = model.encode([text], normalize_embeddings=True)[0]
        
        return embedding.tolist()
    
    async def embed_query(self, query: str) -> List[float]:
        """Embed a query with model-specific prompting if needed."""
        model = self._get_model()
        
        if self.query_prompt_config["enabled"]:
            # Apply model-specific query prompting
            if "prompt_name" in self.query_prompt_config:
                # Use prompt_name parameter (for Qwen3 and Jina v4)
                encode_kwargs = {
                    "normalize_embeddings": True, 
                    "prompt_name": self.query_prompt_config["prompt_name"]
                }
                if "task" in self.query_prompt_config:
                    encode_kwargs["task"] = self.query_prompt_config["task"]
                
                embedding = model.encode([query], **encode_kwargs)[0]
            elif "instruction_template" in self.query_prompt_config:
                # Use instruction template formatting
                formatted_query = self.query_prompt_config["instruction_template"].format(query=query)
                embedding = model.encode([formatted_query], normalize_embeddings=True)[0]
            elif "query_prefix" in self.query_prompt_config:
                # Use prefix formatting (for E5 models)
                prefixed_query = self.query_prompt_config["query_prefix"] + query
                embedding = model.encode([prefixed_query], normalize_embeddings=True)[0]
            else:
                # Fallback to regular embedding
                embedding = model.encode([query], normalize_embeddings=True)[0]
        else:
            # No special prompting needed
            embedding = model.encode([query], normalize_embeddings=True)[0]
        
        return embedding.tolist()

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        model = self._get_model()
        
        # Apply document prefix for E5 models
        if self.query_prompt_config.get("enabled") and "document_prefix" in self.query_prompt_config:
            prefixed_texts = [
                self.query_prompt_config["document_prefix"] + text
                for text in texts
            ]
            embeddings = model.encode(prefixed_texts, normalize_embeddings=True)
        elif self.query_prompt_config.get("enabled") and "prompt_name" in self.query_prompt_config and "jina-embeddings-v4" in self.model_name:
            # For jina v4, use prompt_name="passage" for documents
            encode_kwargs = {
                "normalize_embeddings": True, 
                "prompt_name": "passage"
            }
            if "task" in self.query_prompt_config:
                encode_kwargs["task"] = self.query_prompt_config["task"]
            
            embeddings = model.encode(texts, **encode_kwargs)
        else:
            embeddings = model.encode(texts, normalize_embeddings=True)
            
        return [emb.tolist() for emb in embeddings]
    
    async def embed_queries_batch_internal(self, queries: List[str]) -> List[List[float]]:
        """Embed a batch of queries with model-specific prompting if needed."""
        model = self._get_model()
        
        if self.query_prompt_config["enabled"]:
            # Apply model-specific query prompting
            if "prompt_name" in self.query_prompt_config:
                # Use prompt_name parameter (for Qwen3 and Jina v4)
                encode_kwargs = {
                    "normalize_embeddings": True, 
                    "prompt_name": self.query_prompt_config["prompt_name"]
                }
                if "task" in self.query_prompt_config:
                    encode_kwargs["task"] = self.query_prompt_config["task"]
                
                embeddings = model.encode(queries, **encode_kwargs)
            elif "instruction_template" in self.query_prompt_config:
                # Use instruction template formatting
                formatted_queries = [
                    self.query_prompt_config["instruction_template"].format(query=query) 
                    for query in queries
                ]
                embeddings = model.encode(formatted_queries, normalize_embeddings=True)
            elif "query_prefix" in self.query_prompt_config:
                # Use prefix formatting (for E5 models)
                prefixed_queries = [
                    self.query_prompt_config["query_prefix"] + query
                    for query in queries
                ]
                embeddings = model.encode(prefixed_queries, normalize_embeddings=True)
            else:
                # Fallback to regular embedding
                embeddings = model.encode(queries, normalize_embeddings=True)
        else:
            # No special prompting needed
            embeddings = model.encode(queries, normalize_embeddings=True)
        
        return [emb.tolist() for emb in embeddings]
    
    async def embed_queries_batch(self, queries: List[str], batch_size: int = 500) -> List[List[float]]:
        """Efficiently embed multiple queries using HuggingFace's batch capability with model-specific prompting."""
        all_embeddings = []
        
        # HuggingFace can handle larger batches efficiently since it's local
        for i in range(0, len(queries), batch_size):
            batch = queries[i:i + batch_size]
            print(f"Embedding batch {i//batch_size + 1}/{(len(queries) + batch_size - 1)//batch_size} ({len(batch)} queries)")
            
            try:
                batch_embeddings = await self.embed_queries_batch_internal(batch)
                all_embeddings.extend(batch_embeddings)
            except Exception as e:
                print(f"Error in batch embedding: {e}")
                # Fall back to individual embedding for this batch
                for query in batch:
                    try:
                        embedding = await self.embed_query(query)
                        all_embeddings.append(embedding)
                    except Exception as e2:
                        print(f"Error embedding query '{query}': {e2}")
                        # Add zero embedding as placeholder based on model
                        model = self._get_model()
                        dim = getattr(model, 'get_sentence_embedding_dimension', lambda: 384)()
                        all_embeddings.append([0.0] * dim)
        
        return all_embeddings


class EmbeddingGemmaProvider(EmbeddingProvider):
    """Google EmbeddingGemma provider with specialized encode_document method."""

    def __init__(self, model_name: str):
        self.model_name = model_name
        self.model = None

    def get_name(self) -> str:
        # Convert model path to filename-safe format
        return self.model_name.replace("/", "-").replace("_", "-")

    def _get_model(self):
        if self.model is None:
            import os
            from sentence_transformers import SentenceTransformer
            
            # Get HuggingFace token from environment if available
            hf_token = os.getenv("HF_TOKEN") or os.getenv("HUGGINGFACE_HUB_TOKEN")
            
            # EmbeddingGemma models require trust_remote_code=True
            self.model = SentenceTransformer(
                self.model_name, 
                trust_remote_code=True,
                token=hf_token
            )
        return self.model

    async def embed_text(self, text: str) -> List[float]:
        model = self._get_model()
        # For Bible verses, treat them as documents to be searched
        embedding = model.encode_document([text])[0]
        return embedding.tolist()

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        model = self._get_model()
        # Use encode_document for Bible verses (the content we want to search)
        embeddings = model.encode_document(texts)
        return [emb.tolist() for emb in embeddings]
    
    async def embed_queries_batch(self, queries: List[str], batch_size: int = 500) -> List[List[float]]:
        """Efficiently embed multiple queries using EmbeddingGemma's encode_query method."""
        all_embeddings = []
        
        for i in range(0, len(queries), batch_size):
            batch = queries[i:i + batch_size]
            print(f"Embedding batch {i//batch_size + 1}/{(len(queries) + batch_size - 1)//batch_size} ({len(batch)} queries)")
            
            try:
                model = self._get_model()
                # Use encode_query for search queries
                batch_embeddings = model.encode_query(batch)
                all_embeddings.extend([emb.tolist() for emb in batch_embeddings])
            except Exception as e:
                print(f"Error in batch embedding: {e}")
                # Fall back to individual embedding for this batch
                for query in batch:
                    try:
                        model = self._get_model()
                        embedding = model.encode_query([query])[0]
                        all_embeddings.append(embedding.tolist())
                    except Exception as e2:
                        print(f"Error embedding query '{query}': {e2}")
                        # Add zero embedding as placeholder 
                        all_embeddings.append([0.0] * 768)  # EmbeddingGemma default dimension
        
        return all_embeddings


class JinaProvider(EmbeddingProvider):
    """Jina AI embedding provider."""

    def __init__(self, model_name: str = "jina-embeddings-v3"):
        self.model_name = model_name
        self.client = None

    def get_name(self) -> str:
        return self.model_name

    async def _get_client(self):
        if self.client is None:
            from jina import Client

            self.client = Client()
        return self.client

    async def embed_text(self, text: str) -> List[float]:
        embeddings = await self.embed_batch([text])
        return embeddings[0]

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        # For now, fall back to HuggingFace provider for jina models
        # as they're available on HuggingFace
        hf_provider = HuggingFaceProvider(f"jinaai/{self.model_name}")
        return await hf_provider.embed_batch(texts)


class BGEM3Provider(EmbeddingProvider):
    """BGE-M3 provider supporting dense mode."""

    def __init__(self, model_name: str, mode: str = "dense"):
        self.model_name = model_name
        self.mode = mode  # "dense" only
        self.model = None

        if mode != "dense":
            raise ValueError(f"Unsupported mode: {mode}. Only 'dense' mode is supported.")

    def get_name(self) -> str:
        # Include mode in the name for file organization
        return f"{self.model_name.replace('/', '-')}-{self.mode}"

    def _get_model(self):
        if self.model is None:
            try:
                from FlagEmbedding import BGEM3FlagModel
            except ImportError:
                raise ImportError(
                    "FlagEmbedding library is required for BGE-M3. "
                    "Install with: pip install FlagEmbedding"
                )

            import os
            # Get HuggingFace token from environment if available
            hf_token = os.getenv("HF_TOKEN") or os.getenv("HUGGINGFACE_HUB_TOKEN")

            self.model = BGEM3FlagModel(
                self.model_name,
                use_fp16=True,
                # Pass token if available for private models
                **({'token': hf_token} if hf_token else {})
            )
        return self.model

    async def embed_text(self, text: str) -> List[float]:
        model = self._get_model()
        result = model.encode([text])
        return result['dense_vecs'][0].tolist()

    async def embed_query(self, query: str) -> List[float]:
        # BGE-M3 doesn't need special query prompting
        return await self.embed_text(query)

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        model = self._get_model()
        result = model.encode(texts)
        return [vec.tolist() for vec in result['dense_vecs']]

    async def embed_queries_batch(self, queries: List[str], batch_size: int = 500) -> List[List[float]]:
        """Efficiently embed multiple queries using BGE-M3's batch capability."""
        all_embeddings = []

        # BGE-M3 can handle larger batches efficiently since it's local
        for i in range(0, len(queries), batch_size):
            batch = queries[i:i + batch_size]
            print(f"Embedding batch {i//batch_size + 1}/{(len(queries) + batch_size - 1)//batch_size} ({len(batch)} queries)")

            try:
                batch_embeddings = await self.embed_batch(batch)
                all_embeddings.extend(batch_embeddings)
            except Exception as e:
                print(f"Error in batch embedding: {e}")
                # Fall back to individual embedding for this batch
                for query in batch:
                    try:
                        embedding = await self.embed_query(query)
                        all_embeddings.append(embedding)
                    except Exception as e2:
                        print(f"Error embedding query '{query}': {e2}")
                        # Add zero embedding as placeholder
                        dim = 1024  # BGE-M3 dense dimension
                        all_embeddings.append([0.0] * dim)

        return all_embeddings


class BGEM3HybridProvider(EmbeddingProvider):
    """BGE-M3 hybrid provider that generates both dense and sparse embeddings for hybrid search."""

    def __init__(self, model_name: str):
        self.model_name = model_name
        self.model = None

    def get_name(self) -> str:
        return f"{self.model_name.replace('/', '-')}-hybrid"

    def _get_model(self):
        if self.model is None:
            try:
                from FlagEmbedding import BGEM3FlagModel
            except ImportError:
                raise ImportError(
                    "FlagEmbedding library is required for BGE-M3. "
                    "Install with: pip install FlagEmbedding"
                )

            import os
            # Get HuggingFace token from environment if available
            hf_token = os.getenv("HF_TOKEN") or os.getenv("HUGGINGFACE_HUB_TOKEN")

            self.model = BGEM3FlagModel(
                self.model_name,
                use_fp16=True,
                # Pass token if available for private models
                **({'token': hf_token} if hf_token else {})
            )
        return self.model

    async def embed_text(self, text: str) -> List[float]:
        """For hybrid provider, return dense embedding by default for compatibility."""
        model = self._get_model()
        result = model.encode([text], return_dense=True, return_sparse=True, return_colbert_vecs=False)
        return result['dense_vecs'][0].tolist()

    async def embed_query(self, query: str) -> List[float]:
        return await self.embed_text(query)

    async def embed_batch(self, texts: List[str]) -> List[List[float]]:
        """For hybrid provider, return dense embeddings by default for compatibility."""
        model = self._get_model()
        result = model.encode(texts, return_dense=True, return_sparse=True, return_colbert_vecs=False)
        return [vec.tolist() for vec in result['dense_vecs']]

    async def embed_hybrid_text(self, text: str) -> Dict[str, Any]:
        """Generate both dense and sparse embeddings for hybrid search."""
        model = self._get_model()
        result = model.encode([text], return_dense=True, return_sparse=True, return_colbert_vecs=False)

        # Process sparse embeddings
        sparse_dict = result['lexical_weights'][0]
        max_vocab_size = 30522  # BERT vocabulary size
        dense_sparse = [0.0] * max_vocab_size
        for token_id, weight in sparse_dict.items():
            try:
                token_id_int = int(token_id)
                if token_id_int < max_vocab_size:
                    dense_sparse[token_id_int] = float(weight)
            except (ValueError, TypeError):
                continue

        return {
            'dense': result['dense_vecs'][0].tolist(),
            'sparse': dense_sparse,
            'sparse_dict': sparse_dict  # Keep original sparse dict for better sparse search
        }

    async def embed_hybrid_batch(self, texts: List[str]) -> List[Dict[str, Any]]:
        """Generate both dense and sparse embeddings for multiple texts."""
        model = self._get_model()
        result = model.encode(texts, return_dense=True, return_sparse=True, return_colbert_vecs=False)

        embeddings = []
        max_vocab_size = 30522

        for i, sparse_dict in enumerate(result['lexical_weights']):
            dense_sparse = [0.0] * max_vocab_size
            for token_id, weight in sparse_dict.items():
                try:
                    token_id_int = int(token_id)
                    if token_id_int < max_vocab_size:
                        dense_sparse[token_id_int] = float(weight)
                except (ValueError, TypeError):
                    continue

            embeddings.append({
                'dense': result['dense_vecs'][i].tolist(),
                'sparse': dense_sparse,
                'sparse_dict': sparse_dict
            })

        return embeddings

    async def embed_queries_batch(self, queries: List[str], batch_size: int = 500) -> List[List[float]]:
        """For compatibility, return dense embeddings."""
        return await self.embed_batch(queries)


def _create_bgem3_provider(model_name: str) -> BGEM3Provider:
    """Create a BGE-M3 provider with the appropriate mode based on model name suffix."""
    if model_name.endswith(":dense"):
        base_model = model_name.replace(":dense", "")
        return BGEM3Provider(base_model, "dense")
    elif model_name.endswith(":hybrid"):
        base_model = model_name.replace(":hybrid", "")
        return BGEM3HybridProvider(base_model)
    else:
        # Default to dense mode if no suffix specified
        return BGEM3Provider(model_name, "dense")


def get_available_models() -> Dict[str, Dict[str, Any]]:
    """Return a dictionary of available models organized by provider."""
    return {
        "OpenAI": {
            "models": [
                "text-embedding-3-small",
                "text-embedding-3-large",
                "text-embedding-ada-002",
            ],
            "provider_class": OpenAIProvider,
        },
        "Google Gemini": {
            "models": ["text-embedding-004"],
            "provider_class": GeminiProvider,
        },
        "Voyage AI": {"models": ["voyage-3"], "provider_class": VoyageProvider},
        "HuggingFace": {
            "models": [
                "answerdotai/ModernBERT-base",
                "answerdotai/ModernBERT-large",
                "BAAI/bge-large-en",
                "BAAI/bge-base-en",
                "BAAI/bge-small-en",
                "ibm-granite/granite-embedding-30m-english",
                "ibm-granite/granite-embedding-125m-english",
                "ibm-granite/granite-embedding-107m-multilingual",
                "ibm-granite/granite-embedding-278m-multilingual",
                "infly/inf-retriever-v1",
                "intfloat/e5-large-v2",
                "intfloat/e5-base-v2",
                "intfloat/e5-small-v2",
                "jinaai/jina-embeddings-v4",
                "nomic-ai/nomic-embed-text-v1.5",
                "nvidia/NV-Embed-V2",
                "Qwen/Qwen3-Embedding-0.6B",
                "Qwen/Qwen3-Embedding-4B",
                "Qwen/Qwen3-Embedding-8B",
                "sentence-transformers/all-MiniLM-L6-v2",
                "Salesforce/SFR-Embedding-Mistral",
                "Snowflake/snowflake-arctic-embed-l-v2.0",
                "thenlper/gte-large",
                "thenlper/gte-base",
                "thenlper/gte-small",
            ],
            "provider_class": HuggingFaceProvider,
        },
        "Google EmbeddingGemma": {
            "models": ["google/embeddinggemma-300m"],
            "provider_class": EmbeddingGemmaProvider,
        },
        "BGE-M3": {
            "models": ["BAAI/bge-m3", "BAAI/bge-m3:dense", "BAAI/bge-m3:hybrid"],
            "provider_class": lambda model_name: _create_bgem3_provider(model_name),
        },
        "Jina AI": {"models": ["jina-embeddings-v3"], "provider_class": JinaProvider},
    }


def get_available_translations() -> List[str]:
    """Get available translations by listing JSON files in the text directory."""
    text_dir = Path("text")
    if not text_dir.exists():
        return []

    translations = []
    for file in text_dir.glob("*.json"):
        translation_name = file.stem
        translations.append(translation_name)

    return sorted(translations)


def select_translation() -> str:
    """Interactive translation selection."""
    translations = get_available_translations()

    if not translations:
        print("No translations found in the text directory!")
        exit(1)

    if len(translations) == 1:
        print(f"Using translation: {translations[0]}")
        return translations[0]

    print("Available translations:")
    for i, translation in enumerate(translations, 1):
        print(f"  {i}. {translation}")

    while True:
        try:
            choice = input(f"\nSelect translation (1-{len(translations)}): ").strip()
            idx = int(choice) - 1
            if 0 <= idx < len(translations):
                return translations[idx]
            else:
                print(f"Please enter a number between 1 and {len(translations)}")
        except (ValueError, KeyboardInterrupt):
            print("\nExiting...")
            exit(0)


def select_model() -> EmbeddingProvider:
    """Interactive model selection."""
    models = get_available_models()

    print("Available embedding models:")
    print()

    all_choices = []
    choice_num = 1

    for provider_name, provider_info in models.items():
        print(f"{provider_name}:")
        for model in provider_info["models"]:
            print(f"  {choice_num}. {model}")
            all_choices.append((provider_name, model, provider_info["provider_class"]))
            choice_num += 1
        print()

    while True:
        try:
            choice = input(f"Select model (1-{len(all_choices)}): ").strip()
            idx = int(choice) - 1
            if 0 <= idx < len(all_choices):
                provider_name, model_name, provider_class = all_choices[idx]
                print(f"Selected: {model_name} ({provider_name})")
                return provider_class(model_name)
            else:
                print(f"Please enter a number between 1 and {len(all_choices)}")
        except (ValueError, KeyboardInterrupt):
            print("\nExiting...")
            exit(0)


def load_translation_text(translation: str) -> List[Dict[str, Any]]:
    """Load the text for a specific translation."""
    text_file = Path("text") / f"{translation}.json"

    if not text_file.exists():
        raise FileNotFoundError(f"Translation file not found: {text_file}")

    with open(text_file, "r", encoding="utf-8") as f:
        return json.load(f)


def get_model_provider(provider: EmbeddingProvider) -> str:
    """Get the provider name for a given embedding provider."""
    if isinstance(provider, OpenAIProvider):
        return "openai"
    elif isinstance(provider, GeminiProvider):
        return "google-gemini"
    elif isinstance(provider, VoyageProvider):
        return "voyage"
    elif isinstance(provider, HuggingFaceProvider):
        return "huggingface"
    elif isinstance(provider, EmbeddingGemmaProvider):
        return "huggingface"  # EmbeddingGemma uses HuggingFace directory structure
    elif isinstance(provider, (BGEM3Provider, BGEM3HybridProvider)):
        return "huggingface"  # BGE-M3 uses HuggingFace directory structure
    elif isinstance(provider, JinaProvider):
        return "huggingface"  # JinaProvider falls back to HuggingFace
    else:
        return "unknown"


def create_output_directories(
    verses: List[Dict[str, Any]], provider: EmbeddingProvider
) -> None:
    """Create the necessary output directory structure."""
    provider_name = get_model_provider(provider)
    model_name = provider.get_name()
    books = set(verse["book"] for verse in verses)

    for book in books:
        book_dir = Path("embeddings") / provider_name / model_name / book
        book_dir.mkdir(parents=True, exist_ok=True)


def check_existing_embeddings(
    translation: str, provider: EmbeddingProvider, verses: List[Dict[str, Any]]
) -> List[Dict[str, Any]]:
    """Check which verses already have embeddings and return only missing ones."""
    provider_name = get_model_provider(provider)
    model_name = provider.get_name()
    missing_verses = []

    for verse in verses:
        output_file = (
            Path("embeddings")
            / provider_name
            / model_name
            / verse["book"]
            / f"{verse['chapter']:03d}.json"
        )

        if output_file.exists():
            # Check if this specific verse exists in the file
            try:
                with open(output_file, "r", encoding="utf-8") as f:
                    existing_verses = json.load(f)

                verse_exists = any(
                    v["book"] == verse["book"]
                    and v["chapter"] == verse["chapter"]
                    and v["verse"] == verse["verse"]
                    for v in existing_verses
                )

                if not verse_exists:
                    missing_verses.append(verse)
            except (json.JSONDecodeError, KeyError):
                missing_verses.append(verse)
        else:
            missing_verses.append(verse)

    return missing_verses


async def generate_embeddings(
    translation: str,
    provider: EmbeddingProvider,
    verses: List[Dict[str, Any]],
    batch_size: int = 100,
) -> None:
    """Generate embeddings for verses and save them."""
    provider_name = get_model_provider(provider)
    model_name = provider.get_name()

    print(
        f"Generating embeddings for {len(verses)} verses using {model_name} ({provider_name})..."
    )

    # Group verses by book and chapter for organized saving
    verses_by_chapter = {}
    for verse in verses:
        key = (verse["book"], verse["chapter"])
        if key not in verses_by_chapter:
            verses_by_chapter[key] = []
        verses_by_chapter[key].append(verse)

    # Process in batches
    for (book, chapter), chapter_verses in verses_by_chapter.items():
        print(f"Processing {book} {chapter} ({len(chapter_verses)} verses)...")

        # Load existing embeddings if any
        output_file = (
            Path("embeddings")
            / provider_name
            / model_name
            / book
            / f"{chapter:03d}.json"
        )
        existing_embeddings = []
        if output_file.exists():
            try:
                with open(output_file, "r", encoding="utf-8") as f:
                    existing_embeddings = json.load(f)
            except (json.JSONDecodeError, KeyError):
                existing_embeddings = []

        # Process verses in batches
        new_embeddings = []
        for i in range(0, len(chapter_verses), batch_size):
            batch = chapter_verses[i : i + batch_size]
            texts = [verse["text"] for verse in batch]

            try:
                embeddings = await provider.embed_batch(texts)

                for verse, embedding in zip(batch, embeddings):
                    new_embeddings.append(
                        {
                            "book": verse["book"],
                            "chapter": verse["chapter"],
                            "verse": verse["verse"],
                            "embedding": embedding,
                        }
                    )

                print(
                    f"  Processed batch {i // batch_size + 1}/{(len(chapter_verses) + batch_size - 1) // batch_size}"
                )

            except Exception as e:
                print(f"Error processing batch: {e}")
                continue

        # Merge with existing embeddings and save
        all_embeddings = existing_embeddings + new_embeddings

        # Sort by verse number
        all_embeddings.sort(key=lambda x: x["verse"])

        # Save to file
        output_file.parent.mkdir(parents=True, exist_ok=True)
        with open(output_file, "w", encoding="utf-8") as f:
            json.dump(all_embeddings, f, indent=2)

        print(f"  Saved {len(new_embeddings)} new embeddings to {output_file}")


async def main():
    """Main entry point."""
    parser = argparse.ArgumentParser(description="Bible verse embeddings tool")
    subparsers = parser.add_subparsers(dest="command", help="Available commands")

    # Embed subcommand
    embed_parser = subparsers.add_parser(
        "embed", help="Generate embeddings for Bible verses"
    )
    embed_parser.add_argument("--translation", "-t", help="Translation to use")
    embed_parser.add_argument("--model", "-m", help="Model to use")
    embed_parser.add_argument(
        "--batch-size", "-b", type=int, default=100, help="Batch size for processing"
    )
    embed_parser.add_argument(
        "--skip-existing",
        "-s",
        action="store_true",
        help="Skip verses that already have embeddings",
    )

    # Query subcommand
    query_parser = subparsers.add_parser(
        "query", help="Search Bible verses using embeddings"
    )
    query_parser.add_argument(
        "--no-hnsw",
        action="store_true",
        help="Disable HNSW optimization and use brute-force search"
    )
    
    # Batch subcommand
    batch_parser = subparsers.add_parser(
        "batch", help="Run batch queries from YAML file and evaluate results"
    )
    
    # Autobatch subcommand
    autobatch_parser = subparsers.add_parser(
        "autobatch", help="Run batch queries for all models that don't have results yet"
    )
    
    # Autoembed subcommand
    autoembed_parser = subparsers.add_parser(
        "autoembed", help="Automatically generate embeddings for all models missing embeddings"
    )
    
    # Report subcommand
    report_parser = subparsers.add_parser(
        "report", help="Generate markdown report from batch results CSV"
    )
    report_parser.add_argument(
        "--results-file",
        "-r",
        help="Specific CSV file to read results from (default: reads all files from ./results/ directory)"
    )
    report_parser.add_argument(
        "--output-file",
        "-o",
        default="README.md",
        help="Output markdown file (default: README.md)"
    )
    report_parser.add_argument(
        "--max-queries",
        "-q",
        type=int,
        default=10,
        help="Maximum number of queries to show in detailed results (default: 10)"
    )

    batch_parser.add_argument("--translation", "-t", help="Translation to use")
    batch_parser.add_argument("--model", "-m", help="Model to use") 
    batch_parser.add_argument(
        "--queries-file", 
        "-q", 
        default="queries.yaml",
        help="YAML file containing queries and expected results (default: queries.yaml)"
    )
    batch_parser.add_argument(
        "--concurrency",
        "-c",
        type=int,
        default=5,
        help="Number of concurrent queries to process (default: 5)"
    )
    batch_parser.add_argument(
        "--no-hnsw",
        action="store_true",
        help="Disable HNSW optimization and use brute-force search"
    )
    
    autobatch_parser.add_argument("--translation", "-t", help="Translation to use")
    autobatch_parser.add_argument(
        "--queries-file", 
        "-q", 
        default="queries.yaml",
        help="YAML file containing queries and expected results (default: queries.yaml)"
    )
    autobatch_parser.add_argument(
        "--concurrency",
        "-c",
        type=int,
        default=5,
        help="Number of concurrent queries to process (default: 5)"
    )
    autobatch_parser.add_argument(
        "--no-hnsw",
        action="store_true",
        help="Disable HNSW optimization and use brute-force search"
    )
    autobatch_parser.add_argument(
        "--dry-run",
        action="store_true",
        help="Show which models would be processed without actually running them"
    )
    
    # Autoembed arguments
    autoembed_parser.add_argument("--translation", "-t", help="Translation to use")
    autoembed_parser.add_argument(
        "--batch-size", "-b", type=int, default=100, help="Batch size for processing"
    )
    autoembed_parser.add_argument(
        "--skip-existing",
        "-s",
        action="store_true",
        help="Skip verses that already have embeddings",
    )
    autoembed_parser.add_argument(
        "--dry-run",
        action="store_true",
        help="Show which models would be processed without actually generating embeddings"
    )
    autoembed_parser.add_argument(
        "--include-providers",
        nargs="+",
        help="Only process models from these providers (e.g., 'OpenAI' 'HuggingFace')"
    )
    autoembed_parser.add_argument(
        "--exclude-providers", 
        nargs="+",
        help="Exclude models from these providers (e.g., 'OpenAI' 'HuggingFace')"
    )

    args = parser.parse_args()

    # If no command specified, show help
    if not args.command:
        parser.print_help()
        return

    if args.command == "query":
        await query_mode(args)
        return
    
    if args.command == "batch":
        await batch_mode(args)
        return
    
    if args.command == "autobatch":
        await autobatch_mode(args)
        return
    
    if args.command == "autoembed":
        await autoembed_mode(args)
        return
    
    if args.command == "report":
        generate_report(args)
        return

    if args.command == "embed":
        # Continue with embedding generation logic
        pass

    # Select translation
    if args.translation:
        translation = args.translation
        if translation not in get_available_translations():
            print(f"Translation '{translation}' not found!")
            return
    else:
        translation = select_translation()

    # Select model
    if args.model:
        # Find the model in available models
        provider = None
        models = get_available_models()
        for provider_info in models.values():
            if args.model in provider_info["models"]:
                provider = provider_info["provider_class"](args.model)
                break

        if provider is None:
            print(f"Model '{args.model}' not found!")
            return
    else:
        provider = select_model()

    # Load verses
    print(f"\nLoading verses for translation: {translation}")
    verses = load_translation_text(translation)
    print(f"Loaded {len(verses)} verses")

    # Create output directories
    create_output_directories(verses, provider)

    # Check for existing embeddings
    if args.skip_existing:
        original_count = len(verses)
        verses = check_existing_embeddings(translation, provider, verses)
        print(
            f"Skipping {original_count - len(verses)} verses with existing embeddings"
        )

        if not verses:
            print("All verses already have embeddings!")
            return

    # Generate embeddings
    await generate_embeddings(translation, provider, verses, args.batch_size)

    print(f"\nCompleted! Generated embeddings for {len(verses)} verses.")


def load_embeddings_for_model(
    provider: EmbeddingProvider, translation: str
) -> List[Dict[str, Any]]:
    """Load all embeddings for a specific model and translation."""
    provider_name = get_model_provider(provider)
    model_name = provider.get_name()

    embeddings_dir = Path("embeddings") / provider_name / model_name
    all_embeddings = []

    if not embeddings_dir.exists():
        print(f"No embeddings found for {model_name} ({provider_name})")
        return []

    print(f"Loading embeddings for {model_name} ({provider_name})...")

    # Walk through all book directories
    for book_dir in embeddings_dir.iterdir():
        if not book_dir.is_dir():
            continue

        book_name = book_dir.name

        # Walk through all chapter files
        for chapter_file in book_dir.glob("*.json"):
            try:
                with open(chapter_file, "r", encoding="utf-8") as f:
                    chapter_embeddings = json.load(f)

                for embedding_data in chapter_embeddings:
                    # Add metadata for searching
                    embedding_data["translation"] = translation
                    embedding_data["model"] = model_name
                    embedding_data["provider"] = provider_name
                    all_embeddings.append(embedding_data)

            except (json.JSONDecodeError, KeyError) as e:
                print(f"Error loading {chapter_file}: {e}")
                continue

    print(f"Loaded {len(all_embeddings)} verse embeddings")
    return all_embeddings


def cosine_similarity(a: List[float], b: List[float]) -> float:
    """Calculate cosine similarity between two vectors."""
    import numpy as np
    a_np = np.array(a)
    b_np = np.array(b)

    # Calculate cosine similarity
    dot_product = np.dot(a_np, b_np)
    norm_a = np.linalg.norm(a_np)
    norm_b = np.linalg.norm(b_np)

    if norm_a == 0 or norm_b == 0:
        return 0.0

    return dot_product / (norm_a * norm_b)


def sparse_cosine_similarity(sparse_dict_a: Dict[str, float], sparse_dict_b: Dict[str, float]) -> float:
    """Calculate cosine similarity between two sparse dictionaries."""
    import math

    # Convert string keys to int and find common terms
    dict_a = {int(k): float(v) for k, v in sparse_dict_a.items() if float(v) > 0}
    dict_b = {int(k): float(v) for k, v in sparse_dict_b.items() if float(v) > 0}

    # Calculate dot product
    dot_product = 0.0
    for term_id in dict_a:
        if term_id in dict_b:
            dot_product += dict_a[term_id] * dict_b[term_id]

    # Calculate magnitudes
    magnitude_a = math.sqrt(sum(v * v for v in dict_a.values()))
    magnitude_b = math.sqrt(sum(v * v for v in dict_b.values()))

    if magnitude_a == 0.0 or magnitude_b == 0.0:
        return 0.0

    return dot_product / (magnitude_a * magnitude_b)


def reciprocal_rank_fusion(dense_results: List[Tuple[Dict[str, Any], float]],
                          sparse_results: List[Tuple[Dict[str, Any], float]],
                          dense_weight: float = 1.0,
                          sparse_weight: float = 0.7,
                          k: int = 60) -> List[Tuple[Dict[str, Any], float]]:
    """
    Combine dense and sparse search results using Reciprocal Rank Fusion (RRF).

    RRF formula: RRF(d) = Σ(1 / (k + rank(d)))
    where k is typically 60, rank(d) is the rank of document d in each ranking
    """
    # Create verse ID to result mapping for efficient lookup
    verse_scores = {}

    # Process dense results
    for rank, (verse_data, score) in enumerate(dense_results, 1):
        verse_id = f"{verse_data['book']}_{verse_data['chapter']}_{verse_data['verse']}"
        if verse_id not in verse_scores:
            verse_scores[verse_id] = {
                'verse_data': verse_data,
                'dense_score': score,
                'sparse_score': 0.0,
                'dense_rank': rank,
                'sparse_rank': float('inf'),
                'rrf_score': 0.0
            }
        else:
            verse_scores[verse_id]['dense_score'] = score
            verse_scores[verse_id]['dense_rank'] = rank

    # Process sparse results
    for rank, (verse_data, score) in enumerate(sparse_results, 1):
        verse_id = f"{verse_data['book']}_{verse_data['chapter']}_{verse_data['verse']}"
        if verse_id not in verse_scores:
            verse_scores[verse_id] = {
                'verse_data': verse_data,
                'dense_score': 0.0,
                'sparse_score': score,
                'dense_rank': float('inf'),
                'sparse_rank': rank,
                'rrf_score': 0.0
            }
        else:
            verse_scores[verse_id]['sparse_score'] = score
            verse_scores[verse_id]['sparse_rank'] = rank

    # Calculate RRF scores
    for verse_id, data in verse_scores.items():
        dense_rrf = (dense_weight / (k + data['dense_rank'])) if data['dense_rank'] != float('inf') else 0.0
        sparse_rrf = (sparse_weight / (k + data['sparse_rank'])) if data['sparse_rank'] != float('inf') else 0.0
        data['rrf_score'] = dense_rrf + sparse_rrf

    # Sort by RRF score (descending)
    sorted_results = sorted(verse_scores.values(), key=lambda x: x['rrf_score'], reverse=True)

    # Return in the expected format
    return [(result['verse_data'], result['rrf_score']) for result in sorted_results]


async def hybrid_search_embeddings(
    query: str,
    dense_provider: EmbeddingProvider,
    sparse_provider: EmbeddingProvider,
    translation: str,
    top_k: int = 10,
    dense_weight: float = 1.0,
    sparse_weight: float = 0.7,
    pre_loaded_dense_embeddings: List[Dict[str, Any]] = None,
    pre_loaded_sparse_embeddings: List[Dict[str, Any]] = None,
    use_hnsw: bool = True
) -> List[Tuple[Dict[str, Any], float]]:
    """
    Perform hybrid search combining dense and sparse embeddings using RRF.
    """
    print(f"Performing hybrid search for: '{query}'")

    # Perform dense search
    print("Performing dense search...")
    dense_results = await search_embeddings(
        query, dense_provider, translation, top_k * 2,
        pre_loaded_dense_embeddings, use_hnsw
    )

    # Perform sparse search
    print("Performing sparse search...")
    sparse_results = await search_embeddings(
        query, sparse_provider, translation, top_k * 2,
        pre_loaded_sparse_embeddings, use_hnsw
    )

    print(f"Dense search returned {len(dense_results)} results")
    print(f"Sparse search returned {len(sparse_results)} results")

    # Combine using RRF
    print("Combining results with Reciprocal Rank Fusion...")
    hybrid_results = reciprocal_rank_fusion(
        dense_results, sparse_results, dense_weight, sparse_weight
    )

    return hybrid_results[:top_k]


async def bgem3_hybrid_search(
    query: str,
    hybrid_provider: BGEM3HybridProvider,
    translation: str,
    top_k: int = 10,
    dense_weight: float = 1.0,
    sparse_weight: float = 0.7
) -> List[Tuple[Dict[str, Any], float]]:
    """
    Perform hybrid search using a single BGE-M3 hybrid provider.
    This is more efficient as it uses the same embeddings for both searches.
    """
    print(f"Performing BGE-M3 hybrid search for: '{query}'")

    # Load all hybrid embeddings (both dense and sparse)
    all_embeddings = load_embeddings_for_model(hybrid_provider, translation)
    if not all_embeddings:
        return []

    # Generate query embeddings
    query_hybrid = await hybrid_provider.embed_hybrid_text(query)
    query_dense = query_hybrid['dense']
    query_sparse_dict = query_hybrid['sparse_dict']

    # Perform dense search
    print("Performing dense similarity search...")
    dense_results = []
    for embedding_data in all_embeddings:
        similarity = cosine_similarity(query_dense, embedding_data["embedding"])
        dense_results.append((embedding_data, similarity))

    # Sort dense results
    dense_results.sort(key=lambda x: x[1], reverse=True)
    dense_results = dense_results[:top_k * 2]

    # For sparse search, we would need to load sparse embeddings
    # For now, use a simplified approach
    print("Hybrid search complete!")

    return dense_results[:top_k]


class HNSWIndex:
    """FAISS-based index for fast approximate nearest neighbor search."""
    
    def __init__(self, dimension: int, max_elements: int = 100000):
        import faiss
        import os

        # Set FAISS to single-threaded mode to avoid multiprocessing issues
        os.environ["OMP_NUM_THREADS"] = "1"
        faiss.omp_set_num_threads(1)

        self.dimension = dimension
        self.max_elements = max_elements
        # Use FAISS HNSW index for cosine similarity (using inner product with normalized vectors)
        # Use lower M parameter (16 instead of 32) for faster building with large datasets
        self.index = faiss.IndexHNSWFlat(dimension, 16)  # 16 is M parameter
        # Use much lower efConstruction for faster index building (40 instead of 200)
        self.index.hnsw.efConstruction = 40
        self.embeddings_data = []
        self.built = False
    
    def add_embeddings(self, embeddings_data: List[Dict[str, Any]]):
        """Add embeddings to the index."""
        import numpy as np
        import faiss
        import gc

        try:
            # Convert embeddings to numpy array with better memory management
            print(f"Converting {len(embeddings_data)} embeddings to numpy array...")
            embeddings_array = np.array([data["embedding"] for data in embeddings_data], dtype=np.float32)

            # All providers now return normalized embeddings, but normalize again to ensure consistency
            # for FAISS inner product search (which requires normalized vectors for cosine similarity)
            print("Normalizing embeddings...")
            faiss.normalize_L2(embeddings_array)

            # Add to FAISS index
            print("Adding embeddings to FAISS index...")
            self.index.add(embeddings_array)

            # Clean up the large numpy array to free memory
            del embeddings_array
            gc.collect()

            self.embeddings_data = embeddings_data
            self.built = True

            # Set ef parameter for search (higher = more accurate but slower)
            # Use lower values for faster search with large datasets
            self.index.hnsw.efSearch = max(32, min(100, len(embeddings_data) // 20))

            print(f"HNSW index built successfully with efSearch={self.index.hnsw.efSearch}")

        except Exception as e:
            print(f"Error in add_embeddings: {e}")
            raise
    
    def search(self, query_embedding: List[float], k: int = 10) -> List[Tuple[Dict[str, Any], float]]:
        """Search for k nearest neighbors and return with exact cosine similarities."""
        if not self.built:
            return []
        
        import numpy as np
        import faiss
        query_array = np.array([query_embedding]).astype('float32').reshape(1, -1)
        # All providers now return normalized embeddings, but normalize again to ensure consistency
        # for FAISS inner product search (which requires normalized vectors for cosine similarity)
        faiss.normalize_L2(query_array)
        
        # Get approximate neighbors (returns more than k for exact rescoring)
        search_k = min(k * 3, len(self.embeddings_data))  # Get 3x candidates for rescoring
        distances, indices = self.index.search(query_array, search_k)
        
        # Calculate exact cosine similarities for the candidates
        results = []
        for idx in indices[0]:
            if idx < len(self.embeddings_data) and idx >= 0:  # FAISS can return -1 for invalid indices
                embedding_data = self.embeddings_data[idx]
                exact_similarity = cosine_similarity(query_embedding, embedding_data["embedding"])
                results.append((embedding_data, exact_similarity))
        
        # Sort by exact similarity and return top k
        results.sort(key=lambda x: x[1], reverse=True)
        return results[:k]


# Global cache for HNSW indices
_hnsw_cache = {}

def get_hnsw_index(provider: EmbeddingProvider, translation: str, all_embeddings: List[Dict[str, Any]]) -> HNSWIndex:
    """Get or create FAISS HNSW index for given provider and translation."""
    cache_key = f"{provider.model_name}_{translation}"

    if cache_key in _hnsw_cache:
        return _hnsw_cache[cache_key]

    if not all_embeddings:
        return None

    # For very large datasets, warn about potential memory usage
    if len(all_embeddings) > 50000:
        print(f"Warning: Building HNSW index for {len(all_embeddings)} embeddings may require significant memory and time")
        print("Consider using --no-hnsw if you encounter memory issues")

    # Determine embedding dimension from first embedding
    dimension = len(all_embeddings[0]["embedding"])

    try:
        # Create and build HNSW index with error handling
        print(f"Building FAISS HNSW index for {len(all_embeddings)} embeddings (dimension: {dimension})...")
        hnsw_index = HNSWIndex(dimension, max_elements=len(all_embeddings) * 2)
        hnsw_index.add_embeddings(all_embeddings)

        # Cache the index
        _hnsw_cache[cache_key] = hnsw_index
        print(f"FAISS HNSW index built and cached for {cache_key}")

        return hnsw_index

    except Exception as e:
        print(f"Error building HNSW index: {e}")
        print("Falling back to brute-force search")
        return None


async def search_embeddings(
    query: str, provider: EmbeddingProvider, translation: str, top_k: int = 10, 
    pre_loaded_embeddings: List[Dict[str, Any]] = None, use_hnsw: bool = True
) -> List[Tuple[Dict[str, Any], float]]:
    """Search for similar verses using embeddings with optional HNSW optimization."""
    # Use pre-loaded embeddings if provided, otherwise load them
    if pre_loaded_embeddings is not None:
        all_embeddings = pre_loaded_embeddings
    else:
        all_embeddings = load_embeddings_for_model(provider, translation)

    if not all_embeddings:
        return []

    # Generate embedding for the query
    print(f"Generating embedding for query: '{query}'")
    query_embedding = await provider.embed_query(query)

    # Use HNSW when explicitly requested
    if use_hnsw:
        hnsw_index = get_hnsw_index(provider, translation, all_embeddings)
        if hnsw_index:
            return hnsw_index.search(query_embedding, top_k)
    
    # Fallback to brute-force search for small datasets or when HNSW fails
    print(f"Using brute-force search for {len(all_embeddings)} embeddings")
    results = []
    for embedding_data in all_embeddings:
        similarity = cosine_similarity(query_embedding, embedding_data["embedding"])
        results.append((embedding_data, similarity))

    # Sort by similarity (descending)
    results.sort(key=lambda x: x[1], reverse=True)

    return results[:top_k]


def display_search_results(
    results: List[Tuple[Dict[str, Any], float]], query: str
) -> None:
    """Display search results in a formatted way."""
    print(f"\nTop {len(results)} results for query: '{query}'")
    print("=" * 80)

    for i, (verse_data, similarity) in enumerate(results, 1):
        book = verse_data["book"]
        chapter = verse_data["chapter"]
        verse = verse_data["verse"]

        print(f"{i:2d}. {book} {chapter}:{verse} (similarity: {similarity:.4f})")

        # Load the actual verse text
        try:
            translation = verse_data["translation"]
            text_file = Path("text") / f"{translation}.json"

            if text_file.exists():
                with open(text_file, "r", encoding="utf-8") as f:
                    verses = json.load(f)

                # Find the matching verse
                verse_text = None
                for v in verses:
                    if (
                        v["book"] == book
                        and v["chapter"] == chapter
                        and v["verse"] == verse
                    ):
                        verse_text = v["text"]
                        break

                if verse_text:
                    # Wrap text at reasonable length
                    wrapped_text = "\n    ".join(
                        [verse_text[i : i + 70] for i in range(0, len(verse_text), 70)]
                    )
                    print(f"    {wrapped_text}")
                else:
                    print(f"    [Text not found]")
            else:
                print(f"    [Translation file not found: {translation}]")

        except Exception as e:
            print(f"    [Error loading text: {e}]")

        print()


def select_translation_for_query() -> str:
    """Interactive translation selection for querying."""
    translations = get_available_translations()

    if not translations:
        print("No translations found in the text directory!")
        exit(1)

    if len(translations) == 1:
        print(f"Using translation: {translations[0]}")
        return translations[0]

    print("Available translations:")
    for i, translation in enumerate(translations, 1):
        print(f"  {i}. {translation}")

    while True:
        try:
            choice = input(
                f"\nSelect translation for query (1-{len(translations)}): "
            ).strip()
            idx = int(choice) - 1
            if 0 <= idx < len(translations):
                return translations[idx]
            else:
                print(f"Please enter a number between 1 and {len(translations)}")
        except (ValueError, KeyboardInterrupt):
            print("\nExiting...")
            exit(0)


def select_model_for_query() -> EmbeddingProvider:
    """Interactive model selection for querying."""
    models = get_available_models()

    print("Available embedding models:")
    print()

    all_choices = []
    choice_num = 1

    for provider_name, provider_info in models.items():
        print(f"{provider_name}:")
        for model in provider_info["models"]:
            print(f"  {choice_num}. {model}")
            all_choices.append((provider_name, model, provider_info["provider_class"]))
            choice_num += 1
        print()

    while True:
        try:
            choice = input(f"Select model for query (1-{len(all_choices)}): ").strip()
            idx = int(choice) - 1
            if 0 <= idx < len(all_choices):
                provider_name, model_name, provider_class = all_choices[idx]
                print(f"Selected: {model_name} ({provider_name})")
                return provider_class(model_name)
            else:
                print(f"Please enter a number between 1 and {len(all_choices)}")
        except (ValueError, KeyboardInterrupt):
            print("\nExiting...")
            exit(0)


async def query_mode(args):
    """Interactive query mode."""
    use_hnsw = not args.no_hnsw
    print("Bible Verse Search Mode")
    print("=" * 30)
    print()

    # Select translation
    translation = select_translation_for_query()
    print()

    # Select model
    provider = select_model_for_query()
    print()

    # Interactive query loop
    while True:
        try:
            query = input("\nEnter your search query (or 'quit' to exit): ").strip()

            if query.lower() in ["quit", "exit", "q"]:
                print("Goodbye!")
                break

            if not query:
                print("Please enter a query.")
                continue

            # Get number of results
            try:
                top_k_input = input("Number of results to show (default 10): ").strip()
                top_k = int(top_k_input) if top_k_input else 10
                top_k = max(1, min(top_k, 50))  # Limit between 1 and 50
            except ValueError:
                top_k = 10

            # Perform search
            results = await search_embeddings(query, provider, translation, top_k, use_hnsw=use_hnsw)

            if results:
                display_search_results(results, query)
            else:
                print(
                    "No results found. Make sure embeddings exist for this model and translation."
                )

        except KeyboardInterrupt:
            print("\nGoodbye!")
            break
        except Exception as e:
            print(f"Error during search: {e}")
            print("Please try again.")


def load_queries(queries_file: Path) -> List[Dict[str, Any]]:
    """Load queries from YAML file."""
    if not queries_file.exists():
        print(f"Queries file not found: {queries_file}")
        print("Expected format:")
        print("""# Simple format - list of query/expected pairs
- query: "love your enemies"
  expected: "Matthew 5:44"
- query: "faith hope love"  
  expected: "1 Corinthians 13:13"

# Or with expected as list for multiple valid answers
- query: "god is love"
  expected: ["1 John 4:8", "1 John 4:16"]
""")
        exit(1)
    
    try:
        import yaml
        with open(queries_file, "r", encoding="utf-8") as f:
            queries = yaml.safe_load(f)
            
        # Handle both formats: list directly or under "queries" key
        if isinstance(queries, dict) and "queries" in queries:
            queries = queries["queries"]
        elif not isinstance(queries, list):
            print(f"Invalid queries file format. Expected list of queries in {queries_file}")
            exit(1)
            
        return queries
    except Exception as e:
        print(f"Error loading queries file {queries_file}: {e}")
        exit(1)


def parse_verse_reference(ref: str) -> Tuple[str, int, int]:
    """Parse a verse reference like 'Matthew 5:44' into (book, chapter, verse)."""
    try:
        # Split on the last space to separate book from chapter:verse
        parts = ref.rsplit(" ", 1)
        if len(parts) != 2:
            raise ValueError("Invalid format")
        
        book = parts[0].strip()
        chapter_verse = parts[1]
        
        # Split chapter:verse
        if ":" not in chapter_verse:
            raise ValueError("Missing verse number")
            
        chapter_str, verse_str = chapter_verse.split(":", 1)
        chapter = int(chapter_str.strip())
        verse = int(verse_str.strip())
        
        return book, chapter, verse
    except Exception as e:
        print(f"Error parsing verse reference '{ref}': {e}")
        return None, None, None


def calculate_score(expected_refs, results: List[Tuple[Dict[str, Any], float]]) -> int:
    """Calculate score based on where expected result appears in top 3 results."""
    # Handle both single string and list of expected references
    if isinstance(expected_refs, str):
        expected_refs = [expected_refs]
    elif not expected_refs:
        return 0
    
    # Parse all expected references
    expected_verses = []
    for ref in expected_refs:
        book, chapter, verse = parse_verse_reference(ref)
        if book:
            expected_verses.append((book, chapter, verse))
    
    if not expected_verses:
        return 0
    
    # Check if any expected verse appears in top 3 results
    for i, (verse_data, similarity) in enumerate(results[:3]):
        verse_tuple = (verse_data["book"], verse_data["chapter"], verse_data["verse"])
        if verse_tuple in expected_verses:
            return 3 - i  # 3 points for 1st, 2 for 2nd, 1 for 3rd
    
    return 0  # No points if not in top 3


def format_verse_reference(verse_data: Dict[str, Any]) -> str:
    """Format verse data into a reference string."""
    return f"{verse_data['book']} {verse_data['chapter']}:{verse_data['verse']}"


async def process_single_query(
    query_data: Dict[str, Any],
    provider: EmbeddingProvider, 
    translation: str,
    query_index: int,
    total_queries: int,
    semaphore: Semaphore,
    pre_loaded_embeddings: List[Dict[str, Any]],
    use_hnsw: bool = True
) -> Dict[str, Any]:
    """Process a single query with concurrency control."""
    async with semaphore:
        query = query_data.get("query", "")
        expected = query_data.get("expected", "")
        
        if not query:
            print(f"Skipping query {query_index}: missing 'query' field")
            return None
            
        print(f"Query {query_index}/{total_queries}: {query}")
        
        try:
            # Get top 3 results using pre-loaded embeddings
            search_results = await search_embeddings(query, provider, translation, top_k=3, pre_loaded_embeddings=pre_loaded_embeddings, use_hnsw=use_hnsw)
            
            if not search_results:
                print(f"  No results found for query: {query}")
                return None
            
            # Calculate score if expected result is provided
            score = 0
            if expected:
                score = calculate_score(expected, search_results)
                expected_str = str(expected) if isinstance(expected, list) else expected
                print(f"  Expected: {expected_str} | Score: {score}/3")
            
            # Format results
            result_data = {
                "query": query,
                "expected": expected,
                "score": score,
                "results": []
            }
            
            for j, (verse_data, similarity) in enumerate(search_results):
                result_ref = format_verse_reference(verse_data)
                result_data["results"].append({
                    "reference": result_ref,
                    "similarity": similarity
                })
                print(f"  {j+1}. {result_ref} ({similarity:.4f})")
            
            return result_data
            
        except Exception as e:
            print(f"Error processing query '{query}': {e}")
            return None


async def run_batch_queries_openai_optimized(
    queries: List[Dict[str, Any]], 
    provider: OpenAIProvider, 
    translation: str,
    batch_size: int = 100,
    use_hnsw: bool = True
) -> List[Dict[str, Any]]:
    """Run batch queries optimized for OpenAI using their batch embedding capability."""
    total_queries = len(queries)
    
    print(f"Running {total_queries} batch queries using OpenAI batch optimization...")
    
    # Load embeddings once for all queries
    print("Loading verse embeddings for similarity search...")
    pre_loaded_embeddings = load_embeddings_for_model(provider, translation)
    
    if not pre_loaded_embeddings:
        print("No embeddings found! Make sure embeddings exist for this model and translation.")
        return []
    
    print(f"Loaded {len(pre_loaded_embeddings)} verse embeddings")
    
    # Extract all query texts for batch embedding
    query_texts = []
    query_data_list = []
    for query_data in queries:
        query = query_data.get("query", "")
        if query:
            query_texts.append(query)
            query_data_list.append(query_data)
    
    if not query_texts:
        print("No valid queries found!")
        return []
    
    # Embed all queries in batches using OpenAI's batch API
    print(f"Embedding {len(query_texts)} queries using OpenAI batch API...")
    query_embeddings = await provider.embed_queries_batch(query_texts, batch_size)
    
    if len(query_embeddings) != len(query_texts):
        print(f"Warning: Expected {len(query_texts)} embeddings, got {len(query_embeddings)}")
    
    # Build HNSW index if requested
    hnsw_index = None
    if use_hnsw:
        hnsw_index = get_hnsw_index(provider, translation, pre_loaded_embeddings)
    
    # Process results
    results = []
    for i, (query_data, query_embedding) in enumerate(zip(query_data_list, query_embeddings)):
        query = query_data.get("query", "")
        expected = query_data.get("expected", "")
        
        print(f"Processing query {i+1}/{len(query_texts)}: {query}")
        
        # Use HNSW for similarity search if available, otherwise brute-force
        if hnsw_index:
            search_results = hnsw_index.search(query_embedding, k=3)
        else:
            # Calculate similarities with all verses
            similarities = []
            for embedding_data in pre_loaded_embeddings:
                similarity = cosine_similarity(query_embedding, embedding_data["embedding"])
                similarities.append((embedding_data, similarity))
            
            # Sort by similarity and get top 3
            similarities.sort(key=lambda x: x[1], reverse=True)
            search_results = similarities[:3]
        
        # Calculate score if expected result is provided
        score = 0
        if expected:
            score = calculate_score(expected, search_results)
            expected_str = str(expected) if isinstance(expected, list) else expected
            print(f"  Expected: {expected_str} | Score: {score}/3")
        
        # Format results
        result_data = {
            "query": query,
            "expected": expected,
            "score": score,
            "results": []
        }
        
        for j, (verse_data, similarity) in enumerate(search_results):
            result_ref = format_verse_reference(verse_data)
            result_data["results"].append({
                "reference": result_ref,
                "similarity": similarity
            })
            print(f"  {j+1}. {result_ref} ({similarity:.4f})")
        
        results.append(result_data)
    
    print(f"\nProcessed {len(results)} queries successfully")
    return results


async def run_batch_queries_optimized(
    queries: List[Dict[str, Any]], 
    provider: EmbeddingProvider, 
    translation: str,
    batch_size: int = 100,
    use_hnsw: bool = True
) -> List[Dict[str, Any]]:
    """Run batch queries optimized for providers that support batch embedding."""
    total_queries = len(queries)
    
    print(f"Running {total_queries} batch queries using batch optimization...")
    
    # Load embeddings once for all queries
    print("Loading verse embeddings for similarity search...")
    pre_loaded_embeddings = load_embeddings_for_model(provider, translation)
    
    if not pre_loaded_embeddings:
        print("No embeddings found! Make sure embeddings exist for this model and translation.")
        return []
    
    print(f"Loaded {len(pre_loaded_embeddings)} verse embeddings")
    
    # Extract all query texts for batch embedding
    query_texts = []
    query_data_list = []
    for query_data in queries:
        query = query_data.get("query", "")
        if query:
            query_texts.append(query)
            query_data_list.append(query_data)
    
    if not query_texts:
        print("No valid queries found!")
        return []
    
    # Embed all queries in batches using provider's batch API
    print(f"Embedding {len(query_texts)} queries using batch API...")
    
    # Adjust batch size based on provider type
    if isinstance(provider, (HuggingFaceProvider, BGEM3Provider, BGEM3HybridProvider)):
        batch_size = 500  # Local models can handle larger batches
    elif isinstance(provider, (OpenAIProvider, GeminiProvider, VoyageProvider)):
        batch_size = 100  # API models use smaller batches
    
    query_embeddings = await provider.embed_queries_batch(query_texts, batch_size)
    
    if len(query_embeddings) != len(query_texts):
        print(f"Warning: Expected {len(query_texts)} embeddings, got {len(query_embeddings)}")
    
    # Build HNSW index if requested
    hnsw_index = None
    if use_hnsw:
        hnsw_index = get_hnsw_index(provider, translation, pre_loaded_embeddings)
    
    # Process results
    results = []
    for i, (query_data, query_embedding) in enumerate(zip(query_data_list, query_embeddings)):
        query = query_data.get("query", "")
        expected = query_data.get("expected", "")
        
        print(f"Processing query {i+1}/{len(query_texts)}: {query}")
        
        # Use HNSW for similarity search if available, otherwise brute-force
        if hnsw_index:
            search_results = hnsw_index.search(query_embedding, k=3)
        else:
            # Calculate similarities with all verses
            similarities = []
            for embedding_data in pre_loaded_embeddings:
                similarity = cosine_similarity(query_embedding, embedding_data["embedding"])
                similarities.append((embedding_data, similarity))
            
            # Sort by similarity and get top 3
            similarities.sort(key=lambda x: x[1], reverse=True)
            search_results = similarities[:3]
        
        # Calculate score if expected result is provided
        score = 0
        if expected:
            score = calculate_score(expected, search_results)
            expected_str = str(expected) if isinstance(expected, list) else expected
            print(f"  Expected: {expected_str} | Score: {score}/3")
        
        # Format results
        result_data = {
            "query": query,
            "expected": expected,
            "score": score,
            "results": []
        }
        
        for j, (verse_data, similarity) in enumerate(search_results):
            result_ref = format_verse_reference(verse_data)
            result_data["results"].append({
                "reference": result_ref,
                "similarity": similarity
            })
            print(f"  {j+1}. {result_ref} ({similarity:.4f})")
        
        results.append(result_data)
    
    print(f"\nProcessed {len(results)} queries successfully")
    return results


async def run_batch_queries(
    queries: List[Dict[str, Any]], 
    provider: EmbeddingProvider, 
    translation: str,
    concurrency: int = 5,
    use_hnsw: bool = True
) -> List[Dict[str, Any]]:
    """Run all batch queries with provider-specific optimizations."""
    # Check if provider supports batch optimization
    if hasattr(provider, 'embed_queries_batch'):
        provider_name = type(provider).__name__
        print(f"Using {provider_name} batch optimization...")
        return await run_batch_queries_optimized(queries, provider, translation, use_hnsw=use_hnsw)
    
    # Fall back to standard concurrent processing for other providers
    total_queries = len(queries)
    
    print(f"Running {total_queries} batch queries with concurrency limit of {concurrency}...")
    
    # Load embeddings once for all queries
    print("Loading embeddings for all queries...")
    pre_loaded_embeddings = load_embeddings_for_model(provider, translation)
    
    if not pre_loaded_embeddings:
        print("No embeddings found! Make sure embeddings exist for this model and translation.")
        return []
    
    print(f"Loaded {len(pre_loaded_embeddings)} verse embeddings")
    
    # Create semaphore to limit concurrent requests
    semaphore = Semaphore(concurrency)
    
    # Create tasks for all queries
    tasks = []
    for i, query_data in enumerate(queries, 1):
        task = process_single_query(
            query_data, provider, translation, i, total_queries, semaphore, pre_loaded_embeddings, use_hnsw
        )
        tasks.append(task)
    
    # Run all tasks concurrently
    print(f"Starting concurrent processing...")
    results = await asyncio.gather(*tasks, return_exceptions=True)
    
    # Filter out None results and exceptions
    valid_results = []
    for result in results:
        if isinstance(result, Exception):
            print(f"Exception in batch processing: {result}")
        elif result is not None:
            valid_results.append(result)
    
    print(f"\nProcessed {len(valid_results)} queries successfully out of {total_queries}")
    return valid_results


def write_to_csv(
    results: List[Dict[str, Any]], 
    provider: EmbeddingProvider,
    translation: str
) -> Path:
    """Write results to CSV file using new directory structure."""
    provider_name = get_model_provider(provider)
    model_name = provider.get_name()
    
    # Create results directory structure
    results_dir = Path("results") / provider_name
    results_dir.mkdir(parents=True, exist_ok=True)
    
    # Create CSV file path
    results_file = results_dir / f"{model_name}.csv"
    
    # Always overwrite the file (no appending)
    with open(results_file, "w", newline="", encoding="utf-8") as f:
        fieldnames = [
            "timestamp", "provider", "model", "translation", "query", "expected",
            "result1", "score1", "result2", "score2", "result3", "score3", "points"
        ]
        writer = csv.DictWriter(f, fieldnames=fieldnames)
        writer.writeheader()
        
        timestamp = datetime.now().isoformat()
        
        for result in results:
            # Pad results to ensure we have 3 entries
            padded_results = result["results"] + [{"reference": "", "similarity": 0.0}] * 3
            padded_results = padded_results[:3]  # Take only first 3
            
            row = {
                "timestamp": timestamp,
                "provider": provider_name,
                "model": model_name,
                "translation": translation,
                "query": result["query"],
                "expected": result["expected"],
                "result1": padded_results[0]["reference"],
                "score1": f"{padded_results[0]['similarity']:.4f}",
                "result2": padded_results[1]["reference"],
                "score2": f"{padded_results[1]['similarity']:.4f}",
                "result3": padded_results[2]["reference"],
                "score3": f"{padded_results[2]['similarity']:.4f}",
                "points": result["score"]
            }
            writer.writerow(row)
    
    return results_file


async def batch_mode(args):
    """Batch query processing mode."""
    print("Bible Verse Batch Query Mode")
    print("=" * 35)
    print()
    
    # Load queries
    queries_file = Path(args.queries_file)
    queries = load_queries(queries_file)
    
    print(f"Loaded {len(queries)} queries from {queries_file}")
    
    # Select translation
    if args.translation:
        translation = args.translation
        if translation not in get_available_translations():
            print(f"Translation '{translation}' not found!")
            return
    else:
        translation = select_translation_for_query()
    
    print(f"Using translation: {translation}")
    print()
    
    # Select model
    if args.model:
        # Find the model in available models
        provider = None
        models = get_available_models()
        for provider_info in models.values():
            if args.model in provider_info["models"]:
                provider = provider_info["provider_class"](args.model)
                break
        
        if provider is None:
            print(f"Model '{args.model}' not found!")
            return
    else:
        provider = select_model_for_query()
    
    provider_name = get_model_provider(provider)
    model_name = provider.get_name()
    print(f"Using model: {model_name} ({provider_name})")
    print()
    
    # Run batch queries
    use_hnsw = not args.no_hnsw
    results = await run_batch_queries(queries, provider, translation, args.concurrency, use_hnsw)
    
    if not results:
        print("No results to save.")
        return
    
    # Calculate summary statistics
    total_queries = len(results)
    total_points = sum(r["score"] for r in results)
    max_possible_points = total_queries * 3
    accuracy = (total_points / max_possible_points) * 100 if max_possible_points > 0 else 0
    
    print(f"\nBatch Query Summary:")
    print(f"  Total queries: {total_queries}")
    print(f"  Total points: {total_points}/{max_possible_points}")
    print(f"  Accuracy: {accuracy:.1f}%")
    
    # Save to CSV using new structure
    results_file = write_to_csv(results, provider, translation)
    print(f"\nResults written to: {results_file}")


def get_models_without_results(translation: str) -> List[tuple]:
    """Get list of (provider_name, model_name, provider_class) for models without results."""
    models = get_available_models()
    results_dir = Path("results")
    
    models_without_results = []
    
    for provider_name, provider_info in models.items():
        provider_class = provider_info["provider_class"]
        
        for model_name in provider_info["models"]:
            # Create a provider instance to get the correct directory/file names
            provider_instance = provider_class(model_name)
            provider_dir = get_model_provider(provider_instance)
            model_file_name = provider_instance.get_name()
            
            # Check if results file exists
            results_file = results_dir / provider_dir / f"{model_file_name}.csv"
            
            if not results_file.exists():
                models_without_results.append((provider_name, model_name, provider_class))
    
    return models_without_results


def get_models_without_embeddings(translation: str, include_providers=None, exclude_providers=None) -> List[tuple]:
    """Get list of (provider_name, model_name, provider_class) for models without embeddings."""
    models = get_available_models()
    models_without_embeddings = []
    
    for provider_name, provider_info in models.items():
        # Apply provider filtering
        if include_providers and provider_name not in include_providers:
            continue
        if exclude_providers and provider_name in exclude_providers:
            continue
            
        provider_class = provider_info["provider_class"]
        
        for model_name in provider_info["models"]:
            # Create a provider instance to check embeddings
            provider_instance = provider_class(model_name)
            
            if not check_embeddings_exist(provider_instance, translation):
                models_without_embeddings.append((provider_name, model_name, provider_class))
    
    return models_without_embeddings


def check_embeddings_exist(provider: EmbeddingProvider, translation: str) -> bool:
    """Check if embeddings exist for a given provider and translation."""
    provider_name = get_model_provider(provider)
    model_name = provider.get_name()
    
    embeddings_dir = Path("embeddings") / provider_name / model_name
    
    if not embeddings_dir.exists():
        return False
    
    # Check if there are any embedding files
    for book_dir in embeddings_dir.iterdir():
        if book_dir.is_dir() and any(book_dir.glob("*.json")):
            return True
    
    return False


async def autobatch_mode(args):
    """Automatically run batch processing for all models without results."""
    print("Bible Verse Auto-Batch Processing Mode")
    print("=" * 40)
    print()
    
    # Load queries
    queries_file = Path(args.queries_file)
    queries = load_queries(queries_file)
    
    print(f"Loaded {len(queries)} queries from {queries_file}")
    
    # Select translation
    if args.translation:
        translation = args.translation
        if translation not in get_available_translations():
            print(f"Translation '{translation}' not found!")
            return
    else:
        translation = select_translation_for_query()
    
    print(f"Using translation: {translation}")
    print()
    
    # Get models without results
    models_without_results = get_models_without_results(translation)
    
    if not models_without_results:
        print("All models already have results! No processing needed.")
        return
    
    print(f"Found {len(models_without_results)} models without results:")
    
    # Filter models that have embeddings
    processable_models = []
    for provider_name, model_name, provider_class in models_without_results:
        provider_instance = provider_class(model_name)
        if check_embeddings_exist(provider_instance, translation):
            processable_models.append((provider_name, model_name, provider_class))
            print(f"  ✅ {provider_name}/{model_name} - has embeddings")
        else:
            print(f"  ❌ {provider_name}/{model_name} - missing embeddings (skipping)")
    
    if not processable_models:
        print("\nNo models with embeddings found. Run embedding generation first!")
        return
    
    print(f"\nWill process {len(processable_models)} models with embeddings.")
    
    if args.dry_run:
        print("\nDry run complete. Use --no-dry-run or remove --dry-run to actually process.")
        return
    
    print()
    
    # Process each model
    successful_models = 0
    failed_models = 0
    
    for i, (provider_name, model_name, provider_class) in enumerate(processable_models, 1):
        print(f"Processing model {i}/{len(processable_models)}: {provider_name}/{model_name}")
        print("-" * 60)
        
        try:
            provider = provider_class(model_name)
            
            # Run batch queries
            use_hnsw = not args.no_hnsw
            results = await run_batch_queries(queries, provider, translation, args.concurrency, use_hnsw)
            
            if results:
                # Save results
                results_file = write_to_csv(results, provider, translation)
                
                # Calculate summary statistics
                total_queries = len(results)
                total_points = sum(r["score"] for r in results)
                max_possible_points = total_queries * 3
                accuracy = (total_points / max_possible_points) * 100 if max_possible_points > 0 else 0
                
                print(f"  ✅ Completed: {accuracy:.1f}% accuracy ({total_points}/{max_possible_points} points)")
                print(f"  📁 Results saved to: {results_file}")
                successful_models += 1
            else:
                print(f"  ❌ Failed: No results generated")
                failed_models += 1
                
        except Exception as e:
            print(f"  ❌ Failed with error: {e}")
            failed_models += 1
        
        print()
    
    # Summary
    print("=" * 60)
    print("Auto-batch processing complete!")
    print(f"  ✅ Successful: {successful_models} models")
    if failed_models > 0:
        print(f"  ❌ Failed: {failed_models} models")
    print(f"  📊 Total processed: {successful_models + failed_models} models")
    
    if successful_models > 0:
        print(f"\n💡 Run 'python main.py report' to generate an updated report with all results.")


async def autoembed_mode(args):
    """Automatically generate embeddings for all models without embeddings."""
    print("Bible Verse Auto-Embedding Generation Mode")
    print("=" * 45)
    print()
    
    # Select translation
    if args.translation:
        translation = args.translation
        if translation not in get_available_translations():
            print(f"Translation '{translation}' not found!")
            return
    else:
        translation = select_translation()
    
    print(f"Using translation: {translation}")
    print()
    
    # Load verses for the translation
    print(f"Loading verses for translation: {translation}")
    try:
        verses = load_translation_text(translation)
        print(f"Loaded {len(verses)} verses")
    except FileNotFoundError as e:
        print(f"Error loading translation: {e}")
        return
    
    # Get models without embeddings
    models_without_embeddings = get_models_without_embeddings(
        translation, 
        include_providers=args.include_providers, 
        exclude_providers=args.exclude_providers
    )
    
    if not models_without_embeddings:
        print("All models already have embeddings! No processing needed.")
        return
    
    print(f"Found {len(models_without_embeddings)} models without embeddings:")
    for provider_name, model_name, _ in models_without_embeddings:
        print(f"  - {provider_name}/{model_name}")
    
    if args.dry_run:
        print(f"\nDry run complete. Found {len(models_without_embeddings)} models that need embeddings.")
        print("Use --no-dry-run or remove --dry-run to actually generate embeddings.")
        return
    
    print()
    
    # Process each model
    successful_models = 0
    failed_models = 0
    
    for i, (provider_name, model_name, provider_class) in enumerate(models_without_embeddings, 1):
        print(f"Processing model {i}/{len(models_without_embeddings)}: {provider_name}/{model_name}")
        print("-" * 60)
        
        try:
            # Create provider instance
            provider = provider_class(model_name)
            
            # Create output directories
            create_output_directories(verses, provider)
            
            # Check for existing embeddings and skip if requested
            verses_to_process = verses
            if args.skip_existing:
                original_count = len(verses)
                verses_to_process = check_existing_embeddings(translation, provider, verses)
                skipped_count = original_count - len(verses_to_process)
                if skipped_count > 0:
                    print(f"  Skipping {skipped_count} verses with existing embeddings")
                    
                if not verses_to_process:
                    print(f"  ✅ All verses already have embeddings for this model")
                    successful_models += 1
                    continue
            
            # Generate embeddings
            print(f"  Generating embeddings for {len(verses_to_process)} verses...")
            await generate_embeddings(translation, provider, verses_to_process, args.batch_size)
            
            print(f"  ✅ Completed: Generated embeddings for {len(verses_to_process)} verses")
            successful_models += 1
            
        except Exception as e:
            print(f"  ❌ Failed with error: {e}")
            failed_models += 1
        
        print()
    
    # Summary
    print("=" * 60)
    print("Auto-embedding generation complete!")
    print(f"  ✅ Successful: {successful_models} models")
    if failed_models > 0:
        print(f"  ❌ Failed: {failed_models} models")
    print(f"  📊 Total processed: {successful_models + failed_models} models")
    
    if successful_models > 0:
        print(f"\n💡 New embeddings have been generated. You can now:")
        print(f"   - Use 'uv run main.py query' to search verses")
        print(f"   - Use 'uv run main.py autobatch' to evaluate all models")
        print(f"   - Use 'uv run main.py report' to generate updated reports")


def read_all_results_csv(results_dir: Path = None) -> List[Dict[str, Any]]:
    """Read and parse results from all CSV files in the results directory structure."""
    if results_dir is None:
        results_dir = Path("results")
    
    if not results_dir.exists():
        print(f"Results directory not found: {results_dir}")
        return []
    
    all_results = []
    
    # Walk through the directory structure: results/{provider}/{model}.csv
    for provider_dir in results_dir.iterdir():
        if not provider_dir.is_dir():
            continue
        
        print(f"Reading results from provider: {provider_dir.name}")
        
        for csv_file in provider_dir.glob("*.csv"):
            print(f"  Reading: {csv_file}")
            try:
                with open(csv_file, "r", encoding="utf-8") as f:
                    reader = csv.DictReader(f)
                    for row in reader:
                        # Convert numeric fields
                        try:
                            row["points"] = int(row["points"])
                        except (ValueError, KeyError):
                            row["points"] = 0
                        
                        # Convert similarity scores to float
                        for score_field in ["score1", "score2", "score3"]:
                            try:
                                if score_field in row and row[score_field]:
                                    row[score_field] = float(row[score_field])
                                else:
                                    row[score_field] = 0.0
                            except (ValueError, TypeError):
                                row[score_field] = 0.0
                                
                        all_results.append(row)
            except Exception as e:
                print(f"  Error reading CSV file {csv_file}: {e}")
                continue
    
    print(f"Total results loaded: {len(all_results)}")
    return all_results


def read_results_csv(results_file: Path) -> List[Dict[str, Any]]:
    """Read and parse results from a single CSV file (backward compatibility)."""
    if not results_file.exists():
        print(f"Results file not found: {results_file}")
        return []
    
    results = []
    try:
        with open(results_file, "r", encoding="utf-8") as f:
            reader = csv.DictReader(f)
            for row in reader:
                # Convert numeric fields
                try:
                    row["points"] = int(row["points"])
                except (ValueError, KeyError):
                    row["points"] = 0
                
                # Convert similarity scores to float
                for score_field in ["score1", "score2", "score3"]:
                    try:
                        if score_field in row and row[score_field]:
                            row[score_field] = float(row[score_field])
                        else:
                            row[score_field] = 0.0
                    except (ValueError, TypeError):
                        row[score_field] = 0.0
                        
                results.append(row)
    except Exception as e:
        print(f"Error reading CSV file {results_file}: {e}")
        return []
    
    return results


def analyze_results(results: List[Dict[str, Any]]) -> Dict[str, Any]:
    """Analyze results and generate summary statistics."""
    if not results:
        return {}
    
    # Group by provider and model
    provider_model_stats = {}
    
    for result in results:
        provider = result.get("provider", "unknown")
        model = result.get("model", "unknown")
        translation = result.get("translation", "unknown")
        points = result.get("points", 0)
        
        key = (provider, model, translation)
        
        if key not in provider_model_stats:
            provider_model_stats[key] = {
                "provider": provider,
                "model": model,
                "translation": translation,
                "total_queries": 0,
                "total_points": 0,
                "max_points": 0,
                "correct_top1": 0,  # 3 points
                "correct_top2": 0,  # 2 points
                "correct_top3": 0,  # 1 point
                "incorrect": 0,     # 0 points
                "queries": []
            }
        
        stats = provider_model_stats[key]
        stats["total_queries"] += 1
        stats["total_points"] += points
        stats["max_points"] += 3  # Maximum possible points per query
        
        # Count by position
        if points == 3:
            stats["correct_top1"] += 1
        elif points == 2:
            stats["correct_top2"] += 1
        elif points == 1:
            stats["correct_top3"] += 1
        else:
            stats["incorrect"] += 1
        
        # Store query details for detailed table
        stats["queries"].append({
            "query": result.get("query", ""),
            "expected": result.get("expected", ""),
            "result1": result.get("result1", ""),
            "score1": result.get("score1", "0.0000"),
            "result2": result.get("result2", ""),
            "score2": result.get("score2", "0.0000"),
            "result3": result.get("result3", ""),
            "score3": result.get("score3", "0.0000"),
            "points": points
        })
    
    # Calculate accuracy percentages
    for stats in provider_model_stats.values():
        if stats["max_points"] > 0:
            stats["accuracy"] = (stats["total_points"] / stats["max_points"]) * 100
        else:
            stats["accuracy"] = 0
    
    return provider_model_stats


def generate_summary_table(stats: Dict[tuple, Dict[str, Any]]) -> str:
    """Generate summary table markdown."""
    if not stats:
        return "No results to display.\n\n"
    
    markdown = "## Model Performance Summary\n\n"
    markdown += "| Provider | Model | Translation | Accuracy | Top 1 | Top 2 | Top 3 | Failed | Total |\n"
    markdown += "|----------|-------|-------------|----------|-------|-------|-------|-----------|-------|\n"
    
    # Sort by accuracy (descending)
    sorted_stats = sorted(stats.items(), key=lambda x: x[1]["accuracy"], reverse=True)
    
    for (provider, model, translation), stat in sorted_stats:
        markdown += f"| {provider} | {model} | {translation} | "
        markdown += f"{stat['accuracy']:.1f}% | "
        markdown += f"{stat['correct_top1']} | "
        markdown += f"{stat['correct_top2']} | "
        markdown += f"{stat['correct_top3']} | "
        markdown += f"{stat['incorrect']} | "
        markdown += f"{stat['total_queries']} |\n"
    
    markdown += "\n"
    return markdown


def generate_detailed_table(stats: Dict[tuple, Dict[str, Any]], max_queries: int = 10) -> str:
    """Generate detailed results with individual sections for each model."""
    if not stats:
        return ""
    
    markdown = "## Results\n\n"
    markdown += "✅ denotes accurate result.\n\n"
    
    # Sort models by accuracy (best first)
    sorted_stats = sorted(stats.items(), key=lambda x: x[1]["accuracy"], reverse=True)
    
    for (provider, model, translation), stat in sorted_stats:
        # Create model heading
        model_display = f"{provider}/{model}" if provider != "HuggingFace" else model
        markdown += f"### {model_display} ({translation.upper()})\n\n"
        
        # Add summary statistics
        accuracy = stat["accuracy"]
        total_points = stat["total_points"] 
        max_points = stat["max_points"]
        total_queries = len(stat["queries"])
        
        markdown += f"**Accuracy: {accuracy:.1f}%** ({total_points}/{max_points} points across {total_queries} queries)\n\n"
        
        # Create table for this model
        markdown += "| Query | Expected | Top Result | Score | ✓ |\n"
        markdown += "|-------|----------|------------|-------|---|\n"
        
        # Show up to max_queries results  
        queries = stat["queries"][:max_queries]
        
        for query_result in queries:
            query = query_result["query"]
            # Truncate long queries for table readability
            display_query = query[:50] + "..." if len(query) > 50 else query
            expected = query_result["expected"]
            
            # Get the top result
            if "result1" in query_result and query_result["result1"]:
                result1 = query_result["result1"]
                score1 = query_result.get("score1", 0.0)
                points = query_result.get("points", 0)
                
                # Add checkmark based on points
                if points == 3:
                    checkmark = "✅"  # Perfect match (1st place)
                elif points == 2:
                    checkmark = "⚠️"   # Good match (2nd place)  
                elif points == 1:
                    checkmark = "❌"   # Poor match (3rd place)
                else:
                    checkmark = "❌"   # No match
                
                markdown += f"| {display_query} | {expected} | {result1} | {score1:.4f} | {checkmark} |\n"
            else:
                markdown += f"| {display_query} | {expected} | No results | 0.0000 | ❌ |\n"
        
        if len(stat["queries"]) > max_queries:
            remaining = len(stat["queries"]) - max_queries
            markdown += f"\n*... and {remaining} more queries*\n"
        
        markdown += "\n"
    
    return markdown



def generate_report(args):
    """Generate markdown report and update only the Query Examples section in README.md."""
    print("Bible Verse Embedding Evaluation Report Generator")
    print("=" * 55)
    print()
    
    output_file = Path(args.output_file)
    
    # Check if args.results_file is provided and is a specific file
    if hasattr(args, 'results_file') and args.results_file:
        # Read from specific file (backward compatibility)
        results_file = Path(args.results_file)
        print(f"Reading results from specific file: {results_file}")
        results = read_results_csv(results_file)
    else:
        # Read from all files in the results directory structure
        print("Reading results from directory structure: ./results/")
        results = read_all_results_csv()
    
    if not results:
        print("No results found to process.")
        return
    
    print(f"Loaded {len(results)} result entries")
    
    # Analyze results
    print("Analyzing results...")
    stats = analyze_results(results)
    
    if not stats:
        print("No statistics to generate.")
        return
    
    print(f"Found results for {len(stats)} model/provider combinations")
    
    # Read existing README.md file
    try:
        with open(output_file, "r", encoding="utf-8") as f:
            existing_content = f.read()
    except FileNotFoundError:
        print(f"README.md not found at {output_file}, creating new file")
        existing_content = "# Bible Embeddings\n\n"
    
    # First, remove any existing Legend sections from the content
    import re
    # Remove all Legend sections (including content until next ## section or end)
    legend_pattern = r'## Legend\n\n.*?(?=\n## |\Z)'
    existing_content = re.sub(legend_pattern, '', existing_content, flags=re.DOTALL)
    
    # Find the Results section (or Query Examples for backward compatibility) and replace it
    results_section_start = existing_content.find("## Results")
    if results_section_start == -1:
        results_section_start = existing_content.find("## Query Examples")
    
    if results_section_start == -1:
        # No Results section found, append to end
        print("No existing Results section found, appending to end")
        new_results_section = generate_detailed_table(stats, args.max_queries)
        # Add legend at the end
        new_results_section += "## Legend\n\n"
        new_results_section += "- ✅ **Perfect Match** - Expected result appears as #1 result (3 points)\n"
        new_results_section += "- ⚠️ **Good Match** - Expected result appears as #2 result (2 points)\n"
        new_results_section += "- ❌ **Poor/No Match** - Expected result appears as #3 result (1 point) or not in top 3 (0 points)\n"
        new_content = existing_content.rstrip() + "\n\n" + new_results_section
    else:
        # Find the end of the Results section
        next_section_start = existing_content.find("\n## ", results_section_start + 1)
        
        if next_section_start == -1:
            # Results is the last section
            before_section = existing_content[:results_section_start]
            after_section = ""
        else:
            before_section = existing_content[:results_section_start]
            after_section = existing_content[next_section_start:]
        
        # Replace the Results section
        new_results_section = generate_detailed_table(stats, args.max_queries)
        # Add legend at the end
        new_results_section += "## Legend\n\n"
        new_results_section += "- ✅ **Perfect Match** - Expected result appears as #1 result (3 points)\n"
        new_results_section += "- ⚠️ **Good Match** - Expected result appears as #2 result (2 points)\n"
        new_results_section += "- ❌ **Poor/No Match** - Expected result appears as #3 result (1 point) or not in top 3 (0 points)\n"
        new_content = before_section + new_results_section + after_section
    
    # Write updated content to file
    try:
        with open(output_file, "w", encoding="utf-8") as f:
            f.write(new_content)
        print(f"\nResults section updated in: {output_file}")
    except Exception as e:
        print(f"Error writing report file: {e}")


if __name__ == "__main__":
    asyncio.run(main())