#!/usr/bin/env python3
"""
FastAPI Server Startup Script
=============================

This script provides an easy way to start the FastAPI server with proper
configuration and error handling.

Usage:
    python start_server.py
    python start_server.py --port 8000
    python start_server.py --host 0.0.0.0 --port 5000
"""

import argparse
import sys
import os
import uvicorn
from pathlib import Path

def main():
    """Main function to start the FastAPI server"""
    
    # Add the server directory to Python path
    server_dir = Path(__file__).parent
    sys.path.insert(0, str(server_dir))
    
    # Parse command line arguments
    parser = argparse.ArgumentParser(description='Start the Audit Checklist FastAPI server')
    parser.add_argument('--host', default='0.0.0.0', help='Host to bind the server to (default: 0.0.0.0)')
    parser.add_argument('--port', type=int, default=5000, help='Port to bind the server to (default: 5000)')
    parser.add_argument('--reload', action='store_true', default=True, help='Enable auto-reload for development')
    parser.add_argument('--log-level', default='info', choices=['debug', 'info', 'warning', 'error'], help='Log level')
    
    args = parser.parse_args()
    
    # Check if environment file exists
    env_file = server_dir / 'mongodb.env'
    if not env_file.exists():
        print("❌ Error: mongodb.env file not found!")
        print("Please create the mongodb.env file with your MongoDB connection string.")
        print("Example:")
        print("MONGODB_URI=mongodb+srv://username:password@cluster.mongodb.net/database")
        print("PORT=5000")
        print("CORS_ORIGIN=http://localhost:3000")
        sys.exit(1)
    
    # Load environment variables
    from dotenv import load_dotenv
    load_dotenv(env_file)
    
    # Check if MongoDB URI is set
    if not os.getenv('MONGODB_URI'):
        print("❌ Error: MONGODB_URI not found in mongodb.env file!")
        sys.exit(1)
    
    print("🚀 Starting Audit Checklist FastAPI Server...")
    print(f"📍 Host: {args.host}")
    print(f"🔌 Port: {args.port}")
    print(f"🔄 Auto-reload: {'Enabled' if args.reload else 'Disabled'}")
    print(f"📊 Log level: {args.log_level}")
    print(f"📚 API Documentation: http://{args.host}:{args.port}/docs")
    print(f"🔍 Health Check: http://{args.host}:{args.port}/health")
    print("-" * 50)
    
    try:
        # Start the server
        uvicorn.run(
            "main:app",
            host=args.host,
            port=args.port,
            reload=args.reload,
            log_level=args.log_level,
            access_log=True
        )
    except KeyboardInterrupt:
        print("\n👋 Server stopped by user")
    except Exception as e:
        print(f"❌ Error starting server: {e}")
        sys.exit(1)

if __name__ == "__main__":
    main()