from pydantic_settings import BaseSettings
from functools import lru_cache
from typing import Optional


class Settings(BaseSettings):
    DEBUG: bool = False
    APP_NAME: str = "IntegraRAG"
    QDRANT_COLLECTION: str = "docs"

    CustomLoaders: Optional[bool] = None
    QDRANT_TYPE: str = "docker"
    QDRANT_DOCKER_URL: str = "http://localhost:6333"
    QDRANT_API_KEY: Optional[str] = None
    CHUNK_SIZE: int = 1000
    CHUNK_OVERLAP: Optional[int] = None
    CHUNK_METHOD: Optional[str] = None
    GRADE_WEBHOOK_URL: Optional[str] = None
    REDIS_HOST: str = "localhost"
    REDIS_PORT: int = 6379
    REDIS_PASSWORD: Optional[str] = None
    CALLBACK_URL: Optional[str] = None

    # ---------- BACKENDS ----------
    GENERATION_BACKEND: str = "OLLAMA"
    EMBEDDING_BACKEND: str = "OLLAMA"

    # ---------- API KEYS ----------
    OPENAI_API_KEY: Optional[str] = None
    OPENAI_API_URL: Optional[str] = None

    COHERE_API_KEY: Optional[str] = None

    OLLAMA_URL: str = "http://localhost:11434"
    OLLAMA_API_KEY: Optional[str] = None

    MISTRAL_API_KEY: Optional[str] = None

    GROQ_API_KEY: Optional[str] = None

    OPENROUTER_API_KEY: Optional[str] = None
    OPENROUTER_SITE_URL: str = "http://localhost"
    OPENROUTER_APP_NAME: str = "IntegraRAG"
    OPENROUTER_SEARCH_MODEL: str = "perplexity/sonar-online"

    HF_API_KEY: Optional[str] = None

    DEEPSEEK_API_KEY: Optional[str] = None

    GEMINI_API_KEY: Optional[str] = None

    # ---------- MODELS ----------
    GENERATION_MODEL_ID: str = "deepseek-v3.1:671b-cloud"
    EMBEDDING_MODEL_ID: str = "embeddinggemma:latest"
    EMBEDDING_MODEL_SIZE: int = 768
    INPUT_DAFAULT_MAX_CHARACTERS: Optional[int] = None
    GENERATION_DAFAULT_MAX_TOKENS: Optional[int] = None
    GENERATION_DAFAULT_TEMPERATURE: Optional[float] = None

    class Config:
        env_file = ".env"


@lru_cache
def get_settings():
    return Settings()