/**
 * Environment configuration and validation
 */

const requiredEnvVars = [
  'JWT_SECRET',
  'DB_HOST',
  'DB_USER',
  'DB_PASSWORD',
  'DB_NAME',
  'TMDB_API_KEY'
];

export function validateConfig() {
  const missing = [];
  
  for (const varName of requiredEnvVars) {
    if (!process.env[varName]) {
      missing.push(varName);
    }
  }
  
  if (missing.length > 0) {
    console.error('❌ Missing required environment variables:');
    missing.forEach(varName => {
      console.error(`   - ${varName}`);
    });
    console.error('\nPlease set these in your .env file or environment.');
    process.exit(1);
  }
  
  // Validate JWT_SECRET is strong enough
  if (process.env.JWT_SECRET.length < 32) {
    console.error('❌ JWT_SECRET must be at least 32 characters long for security.');
    process.exit(1);
  }
  
  console.log('✅ Environment configuration validated');
}

export const config = {
  jwt: {
    secret: process.env.JWT_SECRET,
    expiresIn: '7d'
  },
  db: {
    host: process.env.DB_HOST,
    user: process.env.DB_USER,
    password: process.env.DB_PASSWORD,
    database: process.env.DB_NAME,
    port: parseInt(process.env.DB_PORT || '3306', 10)
  },
  tmdb: {
    apiKey: process.env.TMDB_API_KEY,
    baseUrl: 'https://api.themoviedb.org/3'
  },
  server: {
    port: parseInt(process.env.PORT || '3000', 10)
  }
};