<?php
// config/database.php

define('DB_HOST', 'localhost');
define('DB_NAME', 'ksh_porter');
define('DB_USER', 'root');
define('DB_PASS', '@Samui@10742');

// HR Database Configuration
define('HOS_DB_HOST', '10.0.250.115');
define('HOS_DB_NAME', 'hosoffice_2566');
define('HOS_DB_USER', 'hosoffice');
define('HOS_DB_PASS', 'hosoffice10742');

class Database
{
    private static $instance = null;
    private $conn;

    private function __construct()
    {
        try {
            $dsn = "mysql:host=" . DB_HOST . ";dbname=" . DB_NAME . ";charset=utf8mb4";
            $options = [
                PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
                PDO::ATTR_EMULATE_PREPARES => false,
            ];
            $this->conn = new PDO($dsn, DB_USER, DB_PASS, $options);
        } catch (PDOException $e) {
            die("Database connection failed: " . $e->getMessage());
        }
    }

    public static function getInstance()
    {
        if (!self::$instance) {
            self::$instance = new Database();
        }
        return self::$instance->conn;
    }

    public static function getHosInstance()
    {
        try {
            $dsn = "mysql:host=" . HOS_DB_HOST . ";dbname=" . HOS_DB_NAME . ";charset=utf8mb4";
            $options = [
                PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
                PDO::ATTR_EMULATE_PREPARES => false,
            ];
            return new PDO($dsn, HOS_DB_USER, HOS_DB_PASS, $options);
        } catch (PDOException $e) {
            return null; // Return null if unable to connect to HR DB
        }
    }
}