<?php

declare(strict_types=1);

namespace app\api\controller;

use app\common\service\qywx\QywxPromotionRedirectService;
use app\common\service\qywx\QywxPromotionWidgetService;

/** 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)
    {
        $pool = QywxPromotionRedirectService::publicPoolConfig($key);
        if ($pool === null) {
            return response('/* promotion pool not found */', 404, ['Content-Type' => 'application/javascript; charset=utf-8']);
        }
        // 由安装脚本自身的 src 解析 API 域名，避免把请求 Host 写入可公开缓存的 JavaScript。
        $goUrl = '/api/qywx-promotion/go/' . $key;
        $config = QywxPromotionWidgetService::decode($pool['widget_config_json'] ?? null);
        $javascript = QywxPromotionWidgetService::renderScript(
            $key,
            $goUrl,
            $config,
            (int) ($pool['status'] ?? 0) === 1
        );

        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',
        ]);
    }

}