const mysql = require('mysql2/promise');

function createPool() {
  return mysql.createPool({
    host: process.env.DB_HOST || '127.0.0.1',
    port: Number(process.env.DB_PORT || 3306),
    user: process.env.DB_USER || 'signage_user',
    password: process.env.DB_PASSWORD || 'signage_password',
    database: process.env.DB_NAME || 'signage',
    timezone: 'Z',
    waitForConnections: true,
    connectionLimit: 10,
    namedPlaceholders: true
  });
}

async function pruneStaleOnboardingDevices(pool) {
  await pool.query(
    `DELETE FROM d_onboarding_devices
     WHERE modified_at < (CURRENT_TIMESTAMP - INTERVAL 1 MINUTE)`
  );
}

module.exports = {
  createPool,
  pruneStaleOnboardingDevices
};