<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace addon\articles\service;

use addon\articles\model\Article;
use addon\articles\model\ArticleFavorite;

/**
 * 收藏服务
 */
class FavoriteService
{
    /**
     * 收藏 / 取消收藏
     *
     * @return array ['favorited' => bool]
     */
    public static function toggle(int $uid, int $articleId): array
    {
        if ($uid <= 0 || $articleId <= 0) {
            return ['favorited' => false];
        }

        // 只能收藏已发布且未删除的文章
        $exists = Article::where('id', $articleId)->where('status', 1)->where('delete_at', 0)->count();
        if (!$exists) {
            return ['favorited' => false];
        }

        $record = ArticleFavorite::where('uid', $uid)->where('aid', $articleId)->find();
        if ($record) {
            $record->delete();
            return ['favorited' => false];
        }

        ArticleFavorite::create([
            'uid'       => $uid,
            'aid'       => $articleId,
            'create_at' => time(),
        ]);

        return ['favorited' => true];
    }

    /**
     * 是否已收藏
     */
    public static function isFavorited(int $uid, int $articleId): bool
    {
        if ($uid <= 0 || $articleId <= 0) {
            return false;
        }
        return (bool) ArticleFavorite::where('uid', $uid)->where('aid', $articleId)->count();
    }

    /**
     * 我的收藏文章ID（按收藏时间倒序）
     */
    public static function articleIds(int $uid, int $limit = 0): array
    {
        if ($uid <= 0) {
            return [];
        }
        $query = ArticleFavorite::where('uid', $uid)->order('id', 'desc');
        if ($limit > 0) {
            $query->limit($limit);
        }
        return $query->column('aid');
    }
}