const mysql = require('mysql2/promise');
require('dotenv').config();

const pool = mysql.createPool({
    host: process.env.DB_HOST,
    port: process.env.DB_PORT || 3306,
    user: process.env.DB_USER,
    password: process.env.DB_PASSWORD,
    database: process.env.DB_NAME,
    waitForConnections: true,
    connectionLimit: 15, // 增加併發處理能力
    queueLimit: 0,
    multipleStatements: true,
	charset: 'utf8mb4',  // 確保這一行存在
    timezone: '+08:00'   // 強制時區一致
});

// 啟動測試
pool.getConnection()
    .then(conn => {
        console.log('✅ MariaDB Connected Successfully.');
        conn.release();
    })
    .catch(err => {
        console.error('❌ MariaDB Connection Failed:', err.message);
    });

module.exports = pool;