<?php

namespace App\Http\Controllers;

use App\Services\CaptchaService;
use Gregwar\Captcha\CaptchaBuilder;
use Illuminate\Http\Request;
use Illuminate\Support\Str;

class CaptchaController extends Controller
{
    /**
     * 创建图形验证码
     */
    public function store(Request $request, CaptchaService $captchaService)
    {
        $request->validate([
            'key' => ['bail', 'filled', 'string', 'max:32'],
            'w' => ['bail', 'int'],
            'h' => ['bail', 'int'],
        ]);

        $builder = $this->builder();
        $builder->build($request->input('w', 150), $request->input('h', 40));

        $captchaService->put(
            $key = $request->input('key', Str::random(16)),
            $builder->getPhrase()
        );

        return response()->json([
            'key' => $key,
            'img' => $builder->inline(),
        ]);
    }

    /**
     * 查看图形验证码
     *
     * @param string $key
     * @param \Illuminate\Http\Request $request
     * @param \App\Services\CaptchaService $captchaService
     * @return \Illuminate\Http\Response
     */
    public function show($key, Request $request, CaptchaService $captchaService)
    {
        $builder = $this->builder();
        $builder->build(
            (int) $request->query('w', 150),
            (int) $request->query('h', 40),
        );

        if (strlen($key) <= 32) {
            $captchaService->put($key, $builder->getPhrase());
        }

        return response($builder->get())
            ->header('Content-Type', 'image/jpeg')
            ->header('Cache-Control', 'no-cache');
    }

    /**
     * 图形验证码生成器
     *
     * @return \Gregwar\Captcha\CaptchaBuilder
     */
    protected function builder(): CaptchaBuilder
    {
        return new CaptchaBuilder(Str::random(5));
    }
}