<?php

declare(strict_types=1);

namespace app\api\controller;

use app\common\service\qywx\QywxPromotionRedirectService;

/** 企业微信获客助手公开端点：JS 与随机跳转。 */
class QywxPromotionPublicController extends BaseApiController
{
    /** 公开安装代码与随机跳转不依赖前台用户登录。 */
    public array $notNeedLogin = ['script', 'redirect'];

    public function script(string $key)
    {
        if (!QywxPromotionRedirectService::poolExists($key)) {
            return response('/* promotion pool not found */', 404, ['Content-Type' => 'application/javascript; charset=utf-8']);
        }
        $goUrl = rtrim($this->request->domain(), '/') . '/api/qywx-promotion/go/' . $key;
        $jsonKey = json_encode($key, JSON_UNESCAPED_SLASHES | JSON_THROW_ON_ERROR);
        $jsonGo = json_encode($goUrl, JSON_UNESCAPED_SLASHES | JSON_THROW_ON_ERROR);
        $javascript = <<<JS
(function(w,d){
  'use strict';
  var key={$jsonKey}, go={$jsonGo};
  function openPromotion(){
    var source=w.location.href;
    w.location.assign(go+'?from='+encodeURIComponent(source));
  }
  d.addEventListener('click',function(event){
    var node=event.target&&event.target.closest?event.target.closest('[data-wecom-promotion="'+key+'"],.wecom-promotion-link[data-pool="'+key+'"]'):null;
    if(!node){return;}
    event.preventDefault();
    event.stopPropagation();
    openPromotion();
  },true);
  w.WecomPromotion=w.WecomPromotion||{};
  w.WecomPromotion[key]={open:openPromotion};
})(window,document);
JS;

        return response($javascript, 200, [
            'Content-Type' => 'application/javascript; charset=utf-8',
            'Cache-Control' => 'public, max-age=60',
            'X-Content-Type-Options' => 'nosniff',
        ]);
    }

    public function redirect(string $key)
    {
        $picked = QywxPromotionRedirectService::pick($key, [
            'source_url' => (string) $this->request->get('from', ''),
            'referer' => (string) $this->request->header('referer', ''),
            'user_agent' => (string) $this->request->header('user-agent', ''),
            'ip' => (string) $this->request->ip(),
        ]);
        if (!$picked) {
            return response('当前暂无可用的企业微信获客助手链接，请稍后再试。', 503, [
                'Content-Type' => 'text/plain; charset=utf-8',
                'Cache-Control' => 'no-store',
            ]);
        }

        return redirect($picked['url'], 302)->header([
            'Cache-Control' => 'no-store',
            'Referrer-Policy' => 'no-referrer',
        ]);
    }

}