#!/usr/bin/env python3
"""
Deployment configuration and validation script for Chatty application
"""

import os
import sys
import secrets
from config import get_config, validate_environment

def generate_secret_key():
    """Generate a secure secret key"""
    return secrets.token_hex(32)

def check_production_readiness():
    """Check if the application is ready for production deployment"""
    print("Checking production readiness...")
    
    # Set environment to production for validation
    os.environ['FLASK_ENV'] = 'production'
    
    # Validate configuration
    if not validate_environment():
        print("❌ Production configuration validation failed")
        return False
    
    # Additional production checks
    config_class = get_config('production')
    
    checks = [
        ("SECRET_KEY is set", bool(os.environ.get('SECRET_KEY'))),
        ("SECRET_KEY is not default", os.environ.get('SECRET_KEY') != 'dev-secret-key-change-in-production'),
        ("SECRET_KEY is long enough", len(os.environ.get('SECRET_KEY', '')) >= 32),
        ("MONGODB_URL is set", bool(os.environ.get('MONGODB_URL'))),
        ("SESSION_COOKIE_SECURE is enabled", os.environ.get('SESSION_COOKIE_SECURE', '').lower() == 'true'),
        ("Debug mode is disabled", not config_class.DEBUG),
    ]
    
    all_passed = True
    for check_name, passed in checks:
        status = "✅" if passed else "❌"
        print(f"  {status} {check_name}")
        if not passed:
            all_passed = False
    
    if all_passed:
        print("✅ Application is ready for production deployment")
    else:
        print("❌ Application is NOT ready for production deployment")
    
    return all_passed

def setup_development():
    """Set up development environment"""
    print("Setting up development environment...")
    
    env_file = '.env'
    if os.path.exists(env_file):
        print(f"✅ {env_file} already exists")
        return
    
    # Copy from example
    if os.path.exists('.env.example'):
        import shutil
        shutil.copy('.env.example', env_file)
        print(f"✅ Created {env_file} from .env.example")
        print("⚠️  Please edit .env and fill in your actual configuration values")
    else:
        print("❌ .env.example not found")

def generate_production_env():
    """Generate production environment template"""
    print("Generating production environment configuration...")
    
    secret_key = generate_secret_key()
    
    production_env = f"""# Production Environment Configuration for Chatty
# Generated on {os.popen('date').read().strip()}

# =============================================================================
# REQUIRED PRODUCTION CONFIGURATION
# =============================================================================

# Flask Configuration
FLASK_ENV=production
SECRET_KEY={secret_key}

# MongoDB Configuration (REPLACE WITH YOUR VALUES)
MONGODB_URL=mongodb+srv://username:password@cluster.mongodb.net/?retryWrites=true&w=majority&appName=Chatty
MONGODB_DATABASE=Atlas

# Security Configuration
SESSION_COOKIE_SECURE=true
WTF_CSRF_SSL_STRICT=true
SESSION_LIFETIME_HOURS=24

# Rate Limiting (stricter in production)
MAX_LOGIN_ATTEMPTS=3
RATE_LIMIT_WINDOW=1800

# API Configuration
API_URL=https://findEthics-Atlas.hf.space/chat
API_TIMEOUT=30

# Logging
LOG_LEVEL=INFO

# Deployment
PORT=7860

# SSL/TLS Configuration
OPENSSL_CONF=/dev/null
"""
    
    with open('.env.production', 'w') as f:
        f.write(production_env)
    
    print("✅ Created .env.production template")
    print("⚠️  Please review and update the MongoDB URI and other values as needed")

def main():
    """Main deployment script"""
    if len(sys.argv) < 2:
        print("Usage: python deploy.py [command]")
        print("Commands:")
        print("  check-prod    - Check production readiness")
        print("  setup-dev     - Set up development environment")
        print("  gen-prod-env  - Generate production environment template")
        print("  gen-secret    - Generate a new secret key")
        return
    
    command = sys.argv[1]
    
    if command == 'check-prod':
        success = check_production_readiness()
        sys.exit(0 if success else 1)
    
    elif command == 'setup-dev':
        setup_development()
    
    elif command == 'gen-prod-env':
        generate_production_env()
    
    elif command == 'gen-secret':
        print("Generated secret key:")
        print(generate_secret_key())
    
    else:
        print(f"Unknown command: {command}")
        sys.exit(1)

if __name__ == "__main__":
    main()