#!/usr/bin/env python3
"""
BalanceBoard - Startup Script
Starts the Flask server with PostgreSQL/SQLAlchemy
"""

import os
import sys
import signal
from pathlib import Path

# Configuration
FLASK_PORT = 5021


def print_color(text, color='blue'):
    """Print colored text"""
    colors = {
        'red': '\033[0;31m',
        'green': '\033[0;32m',
        'yellow': '\033[1;33m',
        'blue': '\033[0;34m',
        'reset': '\033[0m'
    }
    print(f"{colors.get(color, '')}{text}{colors['reset']}")


def cleanup(signum=None, frame=None):
    """Cleanup: stop Flask server"""
    print()
    print_color("Shutting down...", 'yellow')
    print_color("Goodbye!", 'green')
    sys.exit(0)


def is_port_in_use(port):
    """Check if a port is already in use"""
    try:
        import socket
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            return s.connect_ex(('localhost', port)) == 0
    except:
        return False


def check_postgres_connection():
    """Check if PostgreSQL is available"""
    try:
        import psycopg2
        from dotenv import load_dotenv
        
        load_dotenv()
        
        # Get database connection details
        db_host = os.getenv('POSTGRES_HOST', 'localhost')
        db_port = os.getenv('POSTGRES_PORT', '5432')
        db_name = os.getenv('POSTGRES_DB', 'balanceboard')
        db_user = os.getenv('POSTGRES_USER', 'balanceboard')
        db_password = os.getenv('POSTGRES_PASSWORD', 'changeme')
        
        # Try to connect
        conn = psycopg2.connect(
            host=db_host,
            port=db_port,
            database=db_name,
            user=db_user,
            password=db_password
        )
        conn.close()
        return True
        
    except Exception as e:
        print_color(f"PostgreSQL connection error: {e}", 'red')
        return False


def start_flask():
    """Start Flask server"""
    print_color("Starting Flask server...", 'blue')

    # Check virtual environment
    if not Path('venv').exists():
        print_color("Error: Virtual environment not found!", 'red')
        print("Run: python3 -m venv venv && source venv/bin/activate && pip install -r requirements.txt")
        return False

    # Check PostgreSQL connection
    if not check_postgres_connection():
        print_color("Error: Cannot connect to PostgreSQL!", 'red')
        print()
        print("Please ensure PostgreSQL is running and configured:")
        print("1. Install PostgreSQL: sudo apt install postgresql postgresql-contrib")
        print("2. Create database: sudo -u postgres createdb balanceboard")
        print("3. Create user: sudo -u postgres createuser balanceboard")
        print("4. Set password: sudo -u postgres psql -c \"ALTER USER balanceboard PASSWORD 'changeme';\"")
        print("5. Update .env file with your database settings")
        print()
        return False

    # Create .env if it doesn't exist
    if not Path('.env').exists():
        print_color("Creating .env from .env.example...", 'yellow')
        import secrets
        with open('.env.example', 'r') as f:
            env_content = f.read()
        secret_key = secrets.token_hex(32)
        env_content = env_content.replace('your-secret-key-here-change-this', secret_key)
        with open('.env', 'w') as f:
            f.write(env_content)
        print_color("✓ .env created with random SECRET_KEY", 'green')

    print()
    print_color("=" * 60, 'green')
    print_color("BalanceBoard is running!", 'green')
    print_color("=" * 60, 'green')
    print()
    print_color(f"  Main Feed:    http://localhost:{FLASK_PORT}", 'blue')
    print_color(f"  Login:        http://localhost:{FLASK_PORT}/login", 'blue')
    print_color(f"  Sign Up:      http://localhost:{FLASK_PORT}/signup", 'blue')
    print_color(f"  Admin Panel:  http://localhost:{FLASK_PORT}/admin", 'blue')
    print()
    print_color("Database: PostgreSQL with SQLAlchemy", 'blue')
    print_color("Authentication: bcrypt + Flask-Login", 'blue')
    print()
    print_color("Press Ctrl+C to stop the server", 'yellow')
    print()

    # Import and run Flask app
    try:
        from app import app
        print_color("✓ Flask app imported successfully", 'green')
        print_color("✓ Database initialized with SQLAlchemy", 'green')
        print_color("✓ User authentication ready", 'green')
        print()
        
        # Run Flask
        app.run(host='0.0.0.0', port=FLASK_PORT, debug=True, use_reloader=False)
        
    except Exception as e:
        print_color(f"✗ Failed to start Flask app: {e}", 'red')
        return False


def main():
    """Main entry point"""
    # Register signal handlers
    signal.signal(signal.SIGINT, cleanup)
    signal.signal(signal.SIGTERM, cleanup)

    print_color("=" * 60, 'blue')
    print_color("BalanceBoard - PostgreSQL + SQLAlchemy", 'blue')
    print_color("=" * 60, 'blue')
    print()

    # Start Flask (blocks until Ctrl+C)
    try:
        start_flask()
    except KeyboardInterrupt:
        pass
    finally:
        cleanup()


if __name__ == '__main__':
    main()