<?php

/**
 * Database Configuration
 */

define('DB_HOST', 'localhost');
define('DB_PORT', '3306');
define('DB_NAME', 'ksh_payroll');
define('DB_USER', 'root');
define('DB_PASS', '@Samui@10742');
define('DB_CHARSET', 'utf8mb4');

// HR Database (hosoffice_2566) Connection Details
define('HR_DB_HOST', '10.0.250.115'); // <-- เปลี่ยนเป็น IP ของ HR Server
define('HR_DB_PORT', '3306');
define('HR_DB_NAME', 'hosoffice_2566');
define('HR_DB_USER', 'hosoffice'); // <-- เปลี่ยนเป็น Username ของ HR
define('HR_DB_PASS', 'hosoffice10742'); // <-- เปลี่ยนเป็น Password ของ HR
define('HR_DB_CHARSET', 'utf8mb4'); // หรือ utf8mb4 ขึ้นอยู่กับฐานข้อมูล HR

class Database
{
    private static $instance = null;
    private static $hrInstance = null;
    private $pdo;

    private function __construct($type = 'default')
    {
        if ($type === 'hr') {
            $dsn = "mysql:host=" . HR_DB_HOST . ";port=" . HR_DB_PORT . ";dbname=" . HR_DB_NAME . ";charset=" . HR_DB_CHARSET;
            $user = HR_DB_USER;
            $pass = HR_DB_PASS;
        } else {
            $dsn = "mysql:host=" . DB_HOST . ";port=" . DB_PORT . ";dbname=" . DB_NAME . ";charset=" . DB_CHARSET;
            $user = DB_USER;
            $pass = DB_PASS;
        }

        $options = [
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            PDO::ATTR_EMULATE_PREPARES   => false,
        ];

        try {
            $this->pdo = new PDO($dsn, $user, $pass, $options);
        } catch (\PDOException $e) {
            throw new \PDOException($e->getMessage(), (int)$e->getCode());
        }
    }

    public static function getInstance()
    {
        if (self::$instance === null) {
            self::$instance = new self('default');
        }
        return self::$instance->pdo;
    }

    public static function getHrConnection()
    {
        if (self::$hrInstance === null) {
            self::$hrInstance = new self('hr');
        }
        return self::$hrInstance->pdo;
    }
}