<?php

namespace app\common\service;

use app\common\model\UserPosterCache;
use app\common\server\TencentCosUploader;
use app\common\server\Wx;
use app\common\server\autoload;
use think\facade\Log;

class PosterService
{
    /**
     * 获取或生成用户推广海报
     * 
     * @param int $userId 用户ID
     * @return array 海报信息 ['status' => bool, 'message' => string, 'data' => ['image_url' => string]]
     */
    public function getUserPoster($userId)
    {
        try {
            // 1. 验证用户ID
            if ($userId <= 0) {
                return ['status' => false, 'message' => '无效的用户ID'];
            }

            // 2. 获取系统配置
            $config = getConfig('base');
            $posterPath = $config['poster_template'] ?? '/img_poster.jpg';
            $cacheExpire = $config['poster_cache_expire'] ?? (86400 * 100); // 默认缓存1天

            // 3. 获取模板文件信息
            $templateFile = getcwd() . $posterPath;
            if (!file_exists($templateFile)) {
                return ['status' => false, 'message' => '海报模板文件不存在'];
            }
            $templateHash = md5_file($templateFile);

            // 4. 获取小程序配置
            // 使用新的MiniprogramHelper获取当前域名对应的小程序配置
            $miniprogram = \app\common\helper\MiniprogramHelper::getMiniprogramConfig();
            $appId = $miniprogram['appid'] ?? '';
            if (empty($appId)) {
                $wechat_setting = getConfig("wechat_setting");
                $appId = $wechat_setting['appid'] ?? '';
            }

            // 5. 查询缓存记录
            $cacheRecord = UserPosterCache::findValidCache($userId, $templateHash, $appId);

            // 6. 如果存在有效缓存，直接返回
            if ($cacheRecord) {
                return [
                    'status' => 1,
                    'message' => '海报获取成功',
                    'data' => ['image_url' => $cacheRecord['cos_url']]
                ];
            }

            // 7. 生成推广链接
            $wxServer = new Wx(app());
            $urlLink = $wxServer->generateUrlLinks($userId);
            if (empty($urlLink)) {
                return ['status' => false, 'message' => '生成推广链接失败'];
            }

            // 8. 生成海报图片
            $autoload = new autoload();
            $imageData = $autoload->generatePosterWithQR($templateFile, $urlLink);
            if (!$imageData) {
                return ['status' => false, 'message' => '海报生成失败'];
            }

            // 9. 上传到腾讯云COS
            $cosConfig = getConfig('uploads');
            $tencentUploader = new TencentCosUploader($cosConfig);

            // 创建文件存储路径
            $filePath = 'poster/' . date('Ymd') . '/' . $userId . '_' . substr($templateHash, 0, 8) . '_' . uniqid() . '.png';

            try {
                $uploadResult = $tencentUploader->uploadFile($imageData, $filePath);
                $cosUrl = $uploadResult['full_url'];
                $fileSize = strlen($imageData);

                // 10. 存储缓存记录
                $expiresAt = date('Y-m-d H:i:s', time() + $cacheExpire);
                $cacheData = [
                    'user_id' => $userId,
                    'app_id' => $appId,
                    'template_hash' => $templateHash,
                    'cos_url' => $cosUrl,
                    'file_size' => $fileSize,
                    'mime_type' => 'image/png',
                    'status' => 1,
                    'expires_at' => $expiresAt
                ];

                // 11. 失效该用户的其他海报缓存
                UserPosterCache::invalidateOldCaches($userId, $templateHash);

                // 12. 保存新缓存记录
                $posterCache = new UserPosterCache();
                $posterCache->save($cacheData);

                // 13. 随机清理过期缓存
                if (mt_rand(1, 100) <= 5) {
                    UserPosterCache::cleanExpiredCaches();
                }

                return [
                    'status' => true,
                    'message' => '海报生成成功',
                    'data' => ['image_url' => $cosUrl]
                ];

            } catch (\Exception $e) {
                Log::error('用户海报上传COS失败：' . $e->getMessage());
                return ['status' => false, 'message' => '海报上传失败'];
            }

        } catch (\Exception $e) {
            Log::error('获取用户海报异常：' . $e->getMessage());
            return ['status' => false, 'message' => '系统异常，请稍后重试'];
        }
    }
}