<?php

namespace App\Services;

use App\Exceptions\UserNotFoundException;
use App\Models\User;
use Illuminate\Support\Facades\Cache;
use Session;

class OTPService
{
    public function generate(User $user, int $length = 6): string
    {
        $code = \Str::random($length);

        Cache::put("otp_$user->id", $code, now()->addMinutes(10));
        Session::put('user_id', $user->id);

        return $code;
    }

    /**
     * @throws \Exception
     */
    public function verify(string $otp): bool
    {
        $user = User::find(Session::get('user_id'));

        if (! $user) {
            throw new UserNotFoundException('User not found');
        }

        $code = Cache::get("otp_$user->id");
        if ($code === $otp) {
            Cache::forget("otp_$user->id");

            return true;
        }

        return false;
    }
}