<?php
namespace Blog\Utils;

use Blog\Model\userModel;
use Exception;

class AuthHelper {
  private static ?UserModel $userModel = null;

  public static function initialize(UserModel $userModel): void {
    self::$userModel = $userModel;
  }

  public static function login(string $username, string $password): bool {
    if(!self::$userModel)
      throw new Exception("AuthHelper was not initialized. Please pass UserModel.");

    $user = self::$userModel->getUserByUsername($username);
    if(!$user || !password_verify($password, $user->getPassword())) {
      return false;
    }

    $_SESSION['user'] = [
      'id' => $user->getId(),
      'username' => $user->getUsername()
    ];

    return true;
  }

  public static function logout(): void {
    session_unset();
    session_destroy();
  }

  public static function isLoggedIn(): bool {
    return isset($_SESSION['user']);
  }

  public static function getCurrentUser(): ?array {
    return $_SESSION['user'] ?? null;
  }
}