<?php

declare(strict_types=1);

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Session;

class CaptchaController extends Controller
{
    /**
     * Generate a new arithmetic captcha.
     */
    public function generate(Request $request): \Illuminate\Http\JsonResponse
    {
        $a = random_int(1, 20);
        $b = random_int(1, 20);
        $operations = ['+', '-', '*'];
        $operation = $operations[array_rand($operations)];

        if ($operation === '+') {
            $answer = $a + $b;
        } elseif ($operation === '-') {
            $answer = $a - $b;
        } else {
            $answer = $a * $b;
        }

        $expression = "{$a} {$operation} {$b} = ?";

        Session::put('captcha_answer', (string) $answer);

        return response()->json([
            'expression' => $expression,
        ]);
    }
}