<?php

namespace Modules\Core\Auth\Services;

use Illuminate\Support\Facades\Mail;
use Modules\Core\Auth\Mail\UserOtpMail;

class UserOtpService
{
    private const EXPIRY_MINUTES = 10;
    private const CODE_LENGTH = 6;

    public function generateAndSend(string $email): bool
    {
        $model = config('auth.providers.users.model');
        $user = $model::firstOrCreate(['email' => $email]);

        $code = str_pad((string) random_int(0, 999999), self::CODE_LENGTH, '0', STR_PAD_LEFT);

        $user->otp_code = $code;
        $user->otp_expires_at = now()->addMinutes(self::EXPIRY_MINUTES);
        $user->save();

        Mail::to($user->email)->send(new UserOtpMail($user->name ?? $user->email, $code));

        return true;
    }

    public function validate(string $email, string $code)
    {
        $model = config('auth.providers.users.model');
        $user = $model::where('email', $email)->first();

        if (! $user) {
            return null;
        }

        if (! $user->otp_expires_at || $user->otp_code != $code || now()->isAfter($user->otp_expires_at)) {
            return null;
        }

        $user->otp_code = null;
        $user->otp_expires_at = null;
        $user->save();

        return $user;
    }
}