<?php

namespace lib\Database;

use lib\Database\QueryBuilder;
use PDO;

class DB
{
  private static PDO $pdo;

  public static function init(): void
  {
    $driver  = $_ENV['DATABASE_DRIVER'] ?? $_SERVER['DATABASE_DRIVER'] ?? 'mysql';
    $host    = $_ENV['DATABASE_HOST'] ?? $_SERVER['DATABASE_HOST'] ?? 'localhost';
    $dbname  = $_ENV['DATABASE_DB'] ?? $_SERVER['DATABASE_DB'] ?? 'test';
    $charset = $_ENV['DATABASE_CHARSET'] ?? $_SERVER['DATABASE_CHARSET'] ?? 'utf8';
    $user    = $_ENV['DATABASE_ID'] ?? $_SERVER['DATABASE_ID'] ?? 'root';
    $pass    = $_ENV['DATABASE_PASSWORD'] ?? $_SERVER['DATABASE_PASSWORD'] ?? '';
    $dsn     = sprintf("%s:host=%s;dbname=%s;charset=%s", $driver, $host, $dbname, $charset);
    self::$pdo = new \PDO($dsn, $user, $pass);
    self::$pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
  }

  public static function getPDO(): PDO
  {
    if (!isset(self::$pdo)) {
      throw new \Exception("PDO not initialized. Call DB::init() first.");
    }
    return self::$pdo;
  }
}