<?php

namespace app\api\controller;

use app\common\model\ShortLink;
use app\common\service\FileService;
use app\common\service\ShortLinkPosterDataService;
use app\common\service\ShortLinkQrCodeService;

class ShortLinkController extends BaseApiController
{
    public array $notNeedLogin = ['resolve', 'create'];

    /**
     * @notes 创建短链接
     */
    public function create()
    {
        $pageType = $this->request->post('page_type', '');
        $pageId = $this->request->post('page_id', '');
        $path = $this->request->post('path', '');
        $inviteCode = $this->request->post('invite_code', '');
        $clientTitle = trim((string) $this->request->post('title', ''));
        $clientDesc = trim((string) $this->request->post('description', ''));

        if (empty($pageType)) {
            return $this->fail('参数错误');
        }

        $params = [];
        if (!empty($inviteCode)) {
            $params['invite_code'] = $inviteCode;
        }
        $paramsJson = !empty($params) ? json_encode($params) : '';

        // 查找是否已存在相同的短链接
        $where = [
            'page_type' => $pageType,
            'user_id' => $this->userId,
            'params' => $paramsJson,
        ];
        if (!empty($pageId)) {
            $where['page_id'] = $pageId;
        }
        $existing = ShortLink::where($where)->findOrEmpty();

        if (!$existing->isEmpty()) {
            $code = $existing->code;
            $qrcodeUri = (string) $existing->getData('qrcode');
        } else {
            $code = ShortLink::generateCode();
            $qrcodeUri = '';
        }

        $shortUrl = request()->domain() . '/s/' . $code;

        $posterData = ShortLinkPosterDataService::build($pageType, $pageId, $this->userId, $clientTitle, $clientDesc);

        // 始终生成（覆盖式）：保证海报底图/标题等设置变更后能立即反映到分享图
        $qrcode = ShortLinkQrCodeService::create($shortUrl, $code, $posterData['poster_image_uri'], $posterData);
        $qrcodeUri = $qrcode['uri'];
        $qrcodeUrl = $qrcode['qr_url'];
        $qrcodeDataUrl = $qrcode['data_url'];
        $posterUrl = $qrcode['poster_url'];

        if ($existing->isEmpty()) {
            ShortLink::create([
                'code' => $code,
                'page_type' => $pageType,
                'page_id' => $pageId,
                'path' => $path,
                'qrcode' => $qrcodeUri,
                'params' => $paramsJson,
                'user_id' => $this->userId,
                'click_count' => 0,
                'create_time' => time(),
            ]);
        } elseif ((string) $existing->getData('qrcode') !== $qrcodeUri) {
            $existing->qrcode = $qrcodeUri;
            $existing->save();
        }

        $poster = [
            'poster_image' => $posterData['poster_image'],
            'poster_title' => $posterData['poster_title'],
            'title' => $posterData['title'],
            'description' => $posterData['description'],
            'sharer' => $posterData['sharer'],
            'poster_url' => $posterUrl, // 后端合成的完整海报图（背景+文字+二维码），前端可直接展示
        ];

        return $this->data([
            'short_url' => $shortUrl,
            'code' => $code,
            'qrcode_url' => $qrcodeUrl,
            'qrcode_data' => $qrcodeDataUrl,
            'poster_url' => $posterUrl,
            'poster' => $poster,
        ]);
    }

    /**
     * @notes 解析短链接并上报指纹（前端主页调用）
     */
    public function resolve()
    {
        $code = $this->request->post('code', '');
        if (empty($code)) {
            return $this->fail('参数错误');
        }

        $link = ShortLink::where('code', $code)->findOrEmpty();
        if ($link->isEmpty()) {
            return $this->fail('链接不存在或已失效');
        }

        // 更新点击次数
        $link->inc('click_count')->update();

        // 记录访问日志（指纹+referer）
        $fingerprint = $this->request->post('fingerprint', '');
        $referer = $this->request->post('referer', '');
        if (!empty($fingerprint)) {
            $ua = request()->header('user-agent', '');
            \app\common\model\ShortLinkLog::create([
                'short_link_id' => $link->id,
                'code' => $link->code,
                'ip' => request()->ip(),
                'user_agent' => mb_substr($ua, 0, 512),
                'referer' => mb_substr($referer, 0, 512),
                'fingerprint' => mb_substr($fingerprint, 0, 64),
                'platform' => \app\common\model\ShortLinkLog::parsePlatform($ua),
                'create_time' => time(),
            ]);
        }

        $params = !empty($link->params) ? json_decode($link->params, true) : [];

        return $this->data([
            'page_type' => $link->page_type,
            'page_id' => $link->page_id,
            'path' => $link->path,
            'params' => $params,
        ]);
    }
}