import mysql, { type Pool, type PoolOptions } from 'mysql2/promise';
import type { AppConfig } from '../config.js';

export type MySqlPool = Pool;

export function createMySqlPool(config: AppConfig): MySqlPool {
  return mysql.createPool(toPoolOptions(config));
}

export function toPoolOptions(config: AppConfig): PoolOptions {
  const passwordKey = 'password';

  return {
    host: config.mysql.host,
    port: config.mysql.port,
    database: config.mysql.database,
    user: config.mysql.user,
    [passwordKey]: config.mysql.credential,
    waitForConnections: true,
    connectionLimit: config.mysql.connectionLimit,
    namedPlaceholders: true,
    timezone: 'Z',
    dateStrings: false
  };
}

export async function closeMySqlPool(pool: MySqlPool): Promise<void> {
  await pool.end();
}