#!/usr/bin/env python
"""
Start script for running the Lin application with Gunicorn.
This is primarily for local development and testing of the Gunicorn configuration.
For production, the application is run via the Dockerfile CMD.

Usage:
    python start_gunicorn.py

Note: This is for local testing only. The production setup uses Gunicorn
directly as specified in the gunicorn.conf.py file.
"""

import subprocess
import sys
import os
from pathlib import Path

def main():
    """Start the application using Gunicorn."""
    print("Starting Lin application with Gunicorn...")
    print("Note: This is for local testing. Production uses Docker with Gunicorn directly.")
    print("-" * 60)

    # Change to the project root directory
    project_root = Path(__file__).parent
    os.chdir(project_root)

    try:
        # Run gunicorn with the configuration file - use the correct app path
        cmd = [
            "gunicorn",
            "--config",
            str(project_root / "gunicorn.conf.py"),  # Use the main gunicorn config
            "backend.app:create_app()"
        ]

        print(f"Running command: {' '.join(cmd)}")
        print("-" * 60)

        # Start Gunicorn
        process = subprocess.Popen(cmd)
        process.wait()

    except KeyboardInterrupt:
        print("\nShutting down Gunicorn server...")
        sys.exit(0)
    except Exception as e:
        print(f"Failed to start Gunicorn: {e}")
        import traceback
        traceback.print_exc()
        sys.exit(1)

if __name__ == "__main__":
    main()