<?php
namespace app\core\traits;

use app\core\utils\Cookie;

trait Rememberme {

    /**
     * Cookie definitions
     * 
     * u - USERID
     * r - ROLEID
     * t - REMEMBERME TOKEN
     * ut- isBOUser (1 = BO, 0 = FO)
     */

    public static function get(int $isBOUser = 0) {
        // Get CodeIgniter instance
        $CI =& get_instance();

        if (!self::isRemembered($isBOUser)) return false;

        $CI->load->model('user_model');

        $rem = json_decode(get_cookie($CI->config->item('sess_cookie_name').'_rm'));

        return $CI->user_model->verify_remember_me(
            $rem->u,
            $rem->r,
            $rem->t,
            $rem->ut
        );
    }

    public static function create(int $user_id, int $role_id, int $isBOUser = 1) {
        // Get CodeIgniter instance
        $CI =& get_instance();

        $CI->load->model('user_model');

        // Generate RemToken
        $remToken = generateRandomString(20);

        // Create Rememberme cookie
        Cookie::create([
            'name'   => 'rm',
            'value'  => json_encode([
                "u" => $user_id,
                "r" => $role_id,
                "t" => $remToken,
                "ut" => $isBOUser
            ]),
            'expire' => '172800', //2days
            'prefix' => $CI->config->item('sess_cookie_name').'_',
            // 'domain' => 'localhost'
        ]);
        
        // Save remToken in user account
        $CI->user_model->update_remember_me(
            $user_id,
            $role_id,
            $remToken
        );
    }

    public static function forget() {
        // Get CodeIgniter instance
        $CI =& get_instance();

        $rem = self::get(1);
        $rem = $rem ?? self::get(0);

        if ($rem) {
            // Remove remToken in user account
            $CI->user_model->update_remember_me(
                $rem->user_id,
                $rem->role_id,
                null
            );

            // Remove cookie
            Cookie::delete($CI->config->item('sess_cookie_name').'_rm');
        }
    }

    public static function isRemembered(int $isBOUser = 0): bool {
        // Get CodeIgniter instance
        $CI =& get_instance();
        
        if( (is_null(get_cookie($CI->config->item('sess_cookie_name').'_rm')) || empty(get_cookie($CI->config->item('sess_cookie_name').'_rm'))) )
            return false;

        $rem = json_decode(get_cookie($CI->config->item('sess_cookie_name').'_rm'));

        if ((int) $rem->ut !== $isBOUser)
            return false;
        
        return true;
    }
}