<?php

namespace Login;

use Symfony\Component\Yaml\Yaml;

class Login {

    private $listUser;

    /**
     * Construct a new instance of the class.
     *
     * Initialize the listUser property as an empty array and call the loadUser method.
     */
    function __construct() {
        $this->listUser = [];
        $this->loadUsers();
    }

    /**
     * Add a new user to the list of users.
     *
     * @param string $login The login name of the new user.
     * @param string $password The password of the new user.
     * @param string $role The role of the new user.
     *
     * @return bool True if the user was successfully added, false otherwise.
     */
    public function addUser(string $login, string $password, string $role): bool {
        if ($this->listUser[$login]) {
            return false;
        }
        $newUser = [$login => ['password' => password_hash($password, PASSWORD_DEFAULT), 'role' => $role]];
        $listUser = array_merge($newUser, $this->listUser);

        $yaml = Yaml::dump($listUser);

        return file_put_contents('../data/users.yaml', $yaml);
    }

    /**
     * Load the users from the YAML file.
     *
     * @return void
     */
    private function loadUsers() {
        if (file_exists('../data/users.yaml')) {
            $listUser = Yaml::parseFile('../data/users.yaml');
            if (!empty($listUser)) {
                $this->listUser = $listUser;
            }
        }
    }

    /**
     * Log in a user with the given credentials.
     *
     * @param string $user The username.
     * @param string $password The password.
     *
     * @return bool True if the user is logged in successfully, false otherwise.
     */
    public function logIn(string $user, string $password): bool {
        if ($this->listUser[$user] && password_verify($password, $this->listUser[$user]['password'])) {
            $_SESSION['isLogged'] = true;
            return true;
        }
        return false;
    }

    /**
     * Log out the user and redirect to the index page.
     *
     * @return void
     */
    static function logOut(): void {
        session_destroy();
        header("Location: index.php");
    }

    /**
     * Check if the user is logged in.
     *
     * @return bool True if the user is logged in, false otherwise.
     */
    static function isLogged(): bool {
        if (isset($_SESSION['isLogged']) && $_SESSION['isLogged'] === true) {
            return true;
        }
        return false;
    }
}