import { Pool } from 'pg';

// Prefer DATABASE_URL (set in docker-compose) over individual DB_* vars
const pool = process.env.DATABASE_URL
  ? new Pool({ connectionString: process.env.DATABASE_URL })
  : new Pool({
      user: process.env.DB_USER || 'postgres',
      password: process.env.DB_PASSWORD,
      host: process.env.DB_HOST || 'localhost',
      port: parseInt(process.env.DB_PORT || '5432', 10),
      database: process.env.DB_NAME || 'wild_dragon',
    });

pool.on('error', (err) => {
  console.error('Unexpected error on idle client', err);
});

export default pool;