#!/usr/bin/env python3
"""
🚀 N8N Workflows Search Engine Launcher
Start the advanced search system with optimized performance.
"""

import sys
import os
import argparse
from pathlib import Path


def print_banner():
    """Print application banner."""
    print("🚀 n8n-workflows Advanced Search Engine")
    print("=" * 50)


def check_requirements() -> bool:
    """Check if required dependencies are installed."""
    missing_deps = []
    
    try:
        import sqlite3
    except ImportError:
        missing_deps.append("sqlite3")
    
    try:
        import uvicorn
    except ImportError:
        missing_deps.append("uvicorn")
    
    try:
        import fastapi
    except ImportError:
        missing_deps.append("fastapi")
    
    if missing_deps:
        print(f"❌ Missing dependencies: {', '.join(missing_deps)}")
        print("💡 Install with: pip install -r requirements.txt")
        return False
    
    print("✅ Dependencies verified")
    return True


def setup_directories():
    """Create necessary directories."""
    directories = ["database", "static", "workflows"]
    
    for directory in directories:
        os.makedirs(directory, exist_ok=True)
    
    print("✅ Directories verified")


def setup_database(force_reindex: bool = False, skip_index: bool = False) -> str:
    """Setup and initialize the database."""
    from workflow_db import WorkflowDatabase

    db_path = "database/workflows.db"

    print(f"🔄 Setting up database: {db_path}")
    db = WorkflowDatabase(db_path)

    # Skip indexing in CI mode or if explicitly requested
    if skip_index:
        print("⏭️  Skipping workflow indexing (CI mode)")
        stats = db.get_stats()
        print(f"✅ Database ready: {stats['total']} workflows")
        return db_path

    # Check if database has data or force reindex
    stats = db.get_stats()
    if stats['total'] == 0 or force_reindex:
        print("📚 Indexing workflows...")
        index_stats = db.index_all_workflows(force_reindex=True)
        print(f"✅ Indexed {index_stats['processed']} workflows")

        # Show final stats
        final_stats = db.get_stats()
        print(f"📊 Database contains {final_stats['total']} workflows")
    else:
        print(f"✅ Database ready: {stats['total']} workflows")

    return db_path


def start_server(host: str = "127.0.0.1", port: int = 8000, reload: bool = False):
    """Start the FastAPI server."""
    print(f"🌐 Starting server at http://{host}:{port}")
    print(f"📊 API Documentation: http://{host}:{port}/docs")
    print(f"🔍 Workflow Search: http://{host}:{port}/api/workflows")
    print()
    print("Press Ctrl+C to stop the server")
    print("-" * 50)
    
    # Configure database path
    os.environ['WORKFLOW_DB_PATH'] = "database/workflows.db"
    
    # Start uvicorn with better configuration
    import uvicorn
    uvicorn.run(
        "api_server:app", 
        host=host, 
        port=port, 
        reload=reload,
        log_level="info",
        access_log=False  # Reduce log noise
    )


def main():
    """Main entry point with command line arguments."""
    sys.stdout.reconfigure(encoding='utf-8')
    parser = argparse.ArgumentParser(
        description="N8N Workflows Search Engine",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
Examples:
  python run.py                    # Start with default settings
  python run.py --port 3000        # Start on port 3000
  python run.py --host 0.0.0.0     # Accept external connections
  python run.py --reindex          # Force database reindexing
  python run.py --dev              # Development mode with auto-reload
        """
    )
    
    parser.add_argument(
        "--host", 
        default="127.0.0.1", 
        help="Host to bind to (default: 127.0.0.1)"
    )
    parser.add_argument(
        "--port", 
        type=int, 
        default=8000, 
        help="Port to bind to (default: 8000)"
    )
    parser.add_argument(
        "--reindex", 
        action="store_true", 
        help="Force database reindexing"
    )
    parser.add_argument(
        "--dev",
        action="store_true",
        help="Development mode with auto-reload"
    )
    parser.add_argument(
        "--skip-index",
        action="store_true",
        help="Skip workflow indexing (useful for CI/testing)"
    )

    args = parser.parse_args()

    # Also check environment variable for CI mode
    ci_mode = os.environ.get('CI', '').lower() in ('true', '1', 'yes')
    skip_index = args.skip_index or ci_mode
    
    print_banner()
    
    # Check dependencies
    if not check_requirements():
        sys.exit(1)
    
    # Setup directories
    setup_directories()
    
    # Setup database
    try:
        setup_database(force_reindex=args.reindex, skip_index=skip_index)
    except Exception as e:
        print(f"❌ Database setup error: {e}")
        sys.exit(1)
    
    # Start server
    try:
        start_server(
            host=args.host, 
            port=args.port, 
            reload=args.dev
        )
    except KeyboardInterrupt:
        print("\n👋 Server stopped!")
    except Exception as e:
        print(f"❌ Server error: {e}")
        sys.exit(1)


if __name__ == "__main__":
    main()