/**
 * Database configuration using envalid
 */
import { cleanEnv, str, port, bool, num } from 'envalid';

/**
 * Database configuration with validation and defaults
 */
export const databaseConfig = cleanEnv(process.env, {
  // PostgreSQL Configuration
  DB_HOST: str({ default: 'localhost', desc: 'Database host' }),
  DB_PORT: port({ default: 5432, desc: 'Database port' }),
  DB_NAME: str({ default: 'stockbot', desc: 'Database name' }),
  DB_USER: str({ default: 'stockbot', desc: 'Database user' }),
  DB_PASSWORD: str({ default: '', desc: 'Database password' }),
  
  // Connection Pool Settings
  DB_POOL_MIN: num({ default: 2, desc: 'Minimum pool connections' }),
  DB_POOL_MAX: num({ default: 10, desc: 'Maximum pool connections' }),
  DB_POOL_IDLE_TIMEOUT: num({ default: 30000, desc: 'Pool idle timeout in ms' }),
  
  // SSL Configuration
  DB_SSL: bool({ default: false, desc: 'Enable SSL for database connection' }),
  DB_SSL_REJECT_UNAUTHORIZED: bool({ default: true, desc: 'Reject unauthorized SSL certificates' }),
  
  // Additional Settings
  DB_QUERY_TIMEOUT: num({ default: 30000, desc: 'Query timeout in ms' }),
  DB_CONNECTION_TIMEOUT: num({ default: 5000, desc: 'Connection timeout in ms' }),
  DB_STATEMENT_TIMEOUT: num({ default: 30000, desc: 'Statement timeout in ms' }),
  DB_LOCK_TIMEOUT: num({ default: 10000, desc: 'Lock timeout in ms' }),
  DB_IDLE_IN_TRANSACTION_SESSION_TIMEOUT: num({ default: 60000, desc: 'Idle in transaction timeout in ms' }),
});

// Export typed configuration object
export type DatabaseConfig = typeof databaseConfig;

// Export individual config values for convenience
export const {
  DB_HOST,
  DB_PORT,
  DB_NAME,
  DB_USER,
  DB_PASSWORD,
  DB_POOL_MIN,
  DB_POOL_MAX,
  DB_POOL_IDLE_TIMEOUT,
  DB_SSL,
  DB_SSL_REJECT_UNAUTHORIZED,
  DB_QUERY_TIMEOUT,
  DB_CONNECTION_TIMEOUT,
  DB_STATEMENT_TIMEOUT,
  DB_LOCK_TIMEOUT,
  DB_IDLE_IN_TRANSACTION_SESSION_TIMEOUT,
} = databaseConfig;