"""
Script to cleanup vector data for a specific knowledge base.
Clears the Qdrant collection for the given KB ID, allowing re-indexing.
"""

import asyncio
import logging
import sys

sys.path.insert(0, "Q:\\agentProject\\ai-robot-core\\ai-service")

from app.core.config import get_settings
from app.core.qdrant_client import get_qdrant_client
from app.core.database import get_session
from app.models.entities import KnowledgeBase, Document
from sqlalchemy import select

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s - %(levelname)s - %(message)s"
)
logger = logging.getLogger(__name__)


async def get_knowledge_base_info(kb_id: str) -> dict | None:
    """Get knowledge base information from database."""
    async for session in get_session():
        stmt = select(KnowledgeBase).where(KnowledgeBase.id == kb_id)
        result = await session.execute(stmt)
        kb = result.scalar_one_or_none()
        
        if kb:
            doc_stmt = select(Document).where(Document.kb_id == kb_id)
            doc_result = await session.execute(doc_stmt)
            documents = doc_result.scalars().all()
            
            return {
                "id": str(kb.id),
                "tenant_id": kb.tenant_id,
                "name": kb.name,
                "doc_count": len(documents),
                "document_ids": [str(doc.id) for doc in documents]
            }
        return None


async def list_kb_collections(tenant_id: str, kb_id: str) -> list[str]:
    """List all collections that might be related to the KB."""
    client = await get_qdrant_client()
    qdrant = await client.get_client()
    
    collections = await qdrant.get_collections()
    all_names = [c.name for c in collections.collections]
    
    safe_tenant = tenant_id.replace('@', '_')
    safe_kb = kb_id.replace('-', '_')[:8]
    
    matching = [
        name for name in all_names 
        if safe_kb in name or kb_id.replace('-', '')[:8] in name.replace('_', '')
    ]
    
    return matching


async def clear_kb_vector_data(tenant_id: str, kb_id: str, delete_docs: bool = False) -> bool:
    """
    Clear vector data for a specific knowledge base.
    
    Args:
        tenant_id: Tenant identifier
        kb_id: Knowledge base ID
        delete_docs: Whether to also delete document records from database
    
    Returns:
        True if successful
    """
    client = await get_qdrant_client()
    qdrant = await client.get_client()
    
    collection_name = client.get_kb_collection_name(tenant_id, kb_id)
    
    try:
        exists = await qdrant.collection_exists(collection_name)
        if exists:
            await qdrant.delete_collection(collection_name=collection_name)
            logger.info(f"Deleted Qdrant collection: {collection_name}")
        else:
            logger.info(f"Collection {collection_name} does not exist")
        
        if delete_docs:
            async for session in get_session():
                doc_stmt = select(Document).where(Document.kb_id == kb_id)
                doc_result = await session.execute(doc_stmt)
                documents = doc_result.scalars().all()
                
                for doc in documents:
                    await session.delete(doc)
                
                stmt = select(KnowledgeBase).where(KnowledgeBase.id == kb_id)
                result = await session.execute(stmt)
                kb = result.scalar_one_or_none()
                if kb:
                    kb.doc_count = 0
                    kb.updated_at = datetime.utcnow()
                
                await session.commit()
                logger.info(f"Deleted {len(documents)} document records from database")
                break
        
        return True
        
    except Exception as e:
        logger.error(f"Failed to clear KB vector data: {e}")
        return False


async def main(kb_id: str, delete_docs: bool = False):
    """Main function to clear KB vector data."""
    logger.info(f"Starting cleanup for knowledge base: {kb_id}")
    
    kb_info = await get_knowledge_base_info(kb_id)
    
    if not kb_info:
        logger.error(f"Knowledge base not found: {kb_id}")
        return False
    
    logger.info(f"Found knowledge base:")
    logger.info(f"  - ID: {kb_info['id']}")
    logger.info(f"  - Name: {kb_info['name']}")
    logger.info(f"  - Tenant: {kb_info['tenant_id']}")
    logger.info(f"  - Document count: {kb_info['doc_count']}")
    
    matching_collections = await list_kb_collections(kb_info['tenant_id'], kb_id)
    if matching_collections:
        logger.info(f"  - Related collections: {matching_collections}")
    
    print()
    print("=" * 60)
    print("WARNING: This will delete all vector data for this knowledge base!")
    print(f"Collection to delete: kb_{kb_info['tenant_id'].replace('@', '_')}_{kb_id.replace('-', '_')[:8]}")
    if delete_docs:
        print("Document records in database will also be deleted!")
    print("=" * 60)
    print()
    
    confirm = input("Continue? (yes/no): ")
    if confirm.lower() != "yes":
        print("Cancelled")
        return False
    
    success = await clear_kb_vector_data(
        tenant_id=kb_info['tenant_id'],
        kb_id=kb_id,
        delete_docs=delete_docs
    )
    
    if success:
        logger.info(f"Successfully cleared vector data for KB: {kb_id}")
        logger.info("You can now re-index the knowledge base documents.")
    else:
        logger.error(f"Failed to clear vector data for KB: {kb_id}")
    
    return success


if __name__ == "__main__":
    import argparse
    from datetime import datetime
    
    parser = argparse.ArgumentParser(description="Clear vector data for a knowledge base")
    parser.add_argument("kb_id", help="Knowledge base ID to clear")
    parser.add_argument("--delete-docs", action="store_true", 
                        help="Also delete document records from database")
    
    args = parser.parse_args()
    
    asyncio.run(main(args.kb_id, args.delete_docs))