"""
Script to generate positive pairs and triplets from code chunks.

This script loads code chunks and generates:
1. Positive Pairs: (question, code) with 4-5 variations per sample
2. Triplets: (anchor_question, positive_code, negative_code)

Usage:
    python -m scripts.run_pairs_triplets_pipeline --chunks <path> --output <dir>
    python -m scripts.run_pairs_triplets_pipeline --help

Examples:
    # Generate from local chunks with default settings
    python -m scripts.run_pairs_triplets_pipeline \\
        --chunks data/processed/chunks/Local_saved_files/chunks.jsonl \\
        --output data/processed/training

    # Generate from repository chunks  
    python -m scripts.run_pairs_triplets_pipeline \\
        --chunks data/processed/repos/langgraph_20260116_123638/langgraph_chunks.jsonl \\
        --output data/processed/training/langgraph

    # Custom settings
    python -m scripts.run_pairs_triplets_pipeline \\
        --chunks data/processed/chunks/Local_saved_files/chunks.jsonl \\
        --output data/processed/training \\
        --pairs 100 --triplets 100 --variance 5
"""

import sys
from pathlib import Path

# Add project root to path
PROJECT_ROOT = Path(__file__).parent.parent
sys.path.insert(0, str(PROJECT_ROOT))

from src.task_3_data_engineering.export.pairs_triplets_generator import (
    generate_pairs_and_triplets,
    main as cli_main
)


def run_default_pipeline():
    """Run with default settings for the available chunks."""
    
    # Try multiple possible chunk locations
    possible_paths = [
        PROJECT_ROOT / "data" / "processed" / "chunks" / "Local_saved_files" / "chunks.jsonl",
        PROJECT_ROOT / "data" / "processed" / "chunks" / "sample_code" / "chunks.jsonl",
    ]
    
    # Find all chunks.jsonl files in chunks folder subdirectories
    chunks_dir = PROJECT_ROOT / "data" / "processed" / "chunks"
    if chunks_dir.exists():
        for subdir in chunks_dir.iterdir():
            if subdir.is_dir():
                chunks_file = subdir / "chunks.jsonl"
                if chunks_file.exists() and chunks_file not in possible_paths:
                    possible_paths.append(chunks_file)
    
    # Find repository chunks
    repos_dir = PROJECT_ROOT / "data" / "processed" / "repos"
    if repos_dir.exists():
        for repo_dir in repos_dir.iterdir():
            if repo_dir.is_dir():
                for jsonl_file in repo_dir.glob("*_chunks.jsonl"):
                    possible_paths.append(jsonl_file)
    
    chunks_path = None
    for path in possible_paths:
        if path.exists():
            chunks_path = path
            break
    
    if chunks_path is None:
        print("❌ No chunks files found. Please specify a chunks file with --chunks")
        print("\nPossible locations checked:")
        for p in possible_paths[:5]:
            print(f"   - {p}")
        return
    
    output_dir = PROJECT_ROOT / "data" / "processed" / "training"
    
    print("=" * 60)
    print("🚀 Positive Pairs & Triplets Generator")
    print("=" * 60)
    print(f"\n📂 Chunks Path: {chunks_path}")
    print(f"📁 Output Dir: {output_dir}")
    print(f"📊 Settings: pairs=100, triplets=100, variance=5")
    print("\n" + "-" * 60)
    
    pairs, triplets = generate_pairs_and_triplets(
        chunks_path=chunks_path,
        output_dir=output_dir,
        num_pairs=100,
        num_triplets=100,
        variance=5,
        export_format="both"
    )
    
    print("\n" + "=" * 60)
    print("✅ Pipeline Complete!")
    print("=" * 60)
    print(f"\n📁 Output files saved to: {output_dir}")
    print("   - positive_pairs.jsonl")
    print("   - positive_pairs.json")
    print("   - triplets.jsonl")
    print("   - triplets.json")


if __name__ == "__main__":
    import argparse
    
    # Check if any arguments provided
    if len(sys.argv) > 1:
        # Use CLI with provided arguments
        cli_main()
    else:
        # Run with defaults
        run_default_pipeline()