import os
import subprocess
import sys
import tempfile

# Set up temp directories FIRST, before any imports that might use temp files
def setup_early_temp_directories():
    """Set up temp directories before Flask imports."""
    backend_dir = os.path.dirname(os.path.abspath(__file__))
    temp_dir = os.path.join(backend_dir, 'temp')
    
    try:
        os.makedirs(temp_dir, exist_ok=True)
        os.chmod(temp_dir, 0o755)
        
        # Test write permissions
        test_file = os.path.join(temp_dir, 'test_write_early')
        with open(test_file, 'w') as f:
            f.write('test')
        os.remove(test_file)
        
        # Set environment variables BEFORE any imports that use tempfile
        os.environ['TMPDIR'] = temp_dir
        os.environ['TEMP'] = temp_dir  
        os.environ['TMP'] = temp_dir
        tempfile.tempdir = temp_dir
        
        print(f"✓ Early temp directory setup: {temp_dir}")
        return temp_dir
    except Exception as e:
        print(f"Warning: Early temp directory setup failed: {e}")
        return None

# Set up temp directories before importing app
setup_early_temp_directories()

from app import create_app
from app.models.user import User

# Create the Flask app
flask_app = create_app()

@flask_app.before_first_request
def initialize_database():
    # Create default user if it doesn't exist
    User.create_default_user()

# Wrap Flask app for ASGI compatibility with hypercorn
try:
    from hypercorn.middleware import WSGIMiddleware
    app = WSGIMiddleware(flask_app)
except ImportError:
    # Fallback for when hypercorn isn't installed yet
    app = flask_app

if __name__ == '__main__':
    # Check if hypercorn is available
    try:
        import hypercorn
    except ImportError:
        print("Hypercorn not found. Installing it...")
        subprocess.check_call([sys.executable, "-m", "pip", "install", "hypercorn"])
    
    # Start with hypercorn using command line arguments
    cmd = [
        sys.executable, "-m", "hypercorn",
        "--bind", "0.0.0.0:5137",
        "--workers", "4",
        "--worker-class", "asyncio",
        "--keep-alive", "65",
        "--access-log", "/dev/null",
        "--error-log", "-",
        "--log-level", "info",
        "run:app"
    ]
    
    print("Starting Flask app with Hypercorn...")
    try:
        subprocess.run(cmd)
    except KeyboardInterrupt:
        print("\nShutting down...")
        sys.exit(0)