<?php

namespace App\Services;

//use App\Models\Categories;
use App\Models\Articles;
use App\Models\ArticleLikes;
//use App\Models\Tags;
use Illuminate\Support\Facades\Cache;

class CacheService
{
    public const CACHE_KEYS = [
        'article_order_likes'   => 'article_order_likes',
    ];
    
//    public static function updateOrderLikes(): array
//    {
//        $oStartDate = now()->subDays(30);
//
//        $aHotArticles = ArticleLikes::select('iArticleId', \DB::raw('count(*) as iTotalLikes'))
//            ->where('created_at', '>=', $oStartDate)
//            ->groupBy('iArticleId')
//            ->orderBy('iTotalLikes', 'desc')
//            ->with(['oArticle' => function($oQuery) {
//                $oQuery->where('iStatus', 1);
//            }])
//            ->limit(10)
//            ->get()
//            ->filter(fn($oItem) => $oItem->oArticle !== null)
//            ->toArray(); // 存入缓存建议转成数组，性能更稳
//
//        // 存入缓存，永久保存（直到下一次更新）
//        Cache::forever(self::CACHE_KEYS['article_order_likes'], $aHotArticles);
//
//        return $aHotArticles;
//    }
    
    public static function updateOrderLikes(): array
    {
        // 1. 获取最近点赞的文章ID流
        // 使用 max(id) 或 max(created_at) 来确保每个文章只出现一次，且取的是它最后一次被点赞的时间
        $aHotArticles = ArticleLikes::select('iArticleId', \DB::raw('MAX(created_at) as sLatestLikeTime'))
            ->whereHas('oArticle', function($oQuery) {
                $oQuery->where('iStatus', 1); // 只看发布状态的文章
            })
            ->groupBy('iArticleId')
            ->orderBy('sLatestLikeTime', 'desc') // 按最后一次点赞时间倒序
            ->limit(10)
            ->with('oArticle') // 预加载文章详情
            ->get()
            ->map(function($oItem) {
                // 格式化输出，把文章对象和点赞时间揉在一起
                return [
                    'iArticleId' => $oItem->iArticleId,
                    'sLatestLikeTime' => $oItem->sLatestLikeTime,
                    'oArticle' => $oItem->oArticle
                ];
            })
            ->toArray();

        // 2. 存入缓存
        Cache::forever(self::CACHE_KEYS['article_order_likes'], $aHotArticles);

        return $aHotArticles;
    }
    
}