backend/src/utils/db.js

const { Pool } = require('pg');

const pool = new Pool({
  host: process.env.DB_HOST || 'localhost',
  port: parseInt(process.env.DB_PORT) || 5432,
  database: process.env.DB_NAME || 'taskflow',
  user: process.env.DB_USER || 'taskflow_user',
  password: process.env.DB_PASSWORD || 'taskflow_secret',
  max: 20,
  idleTimeoutMillis: 30000,
  connectionTimeoutMillis: 2000,
});

pool.on('error', (err) => {
  console.error('Unexpected PostgreSQL error:', err);
  process.exit(-1);
});

const query = (text, params) => pool.query(text, params);

const getClient = () => pool.connect();

module.exports = { query, getClient, pool };