<?php
declare(strict_types=1);

namespace app\common\model;

use think\Model;

/**
 * 用户收藏资讯模型
 * Class UserNewsFavorite
 * @package app\common\model
 */
class UserNewsFavorite extends Model
{
    // 设置表名
    protected $name = 'user_news_favorite';
    
    // 设置主键
    protected $pk = 'id';
    
    // 自动写入时间戳字段
    protected $autoWriteTimestamp = true;
    
    // 定义时间戳字段名
    protected $createTime = 'create_time';
    protected $updateTime = false; // 不使用更新时间
    
    /**
     * 查询用户是否收藏了指定新闻
     * @param int $userId 用户ID
     * @param int $newsId 新闻ID
     * @return bool|array false表示未收藏，array表示收藏信息
     */
    public static function isFavorite($userId, $newsId)
    {
        $where = [
            'user_id' => $userId,
            'news_id' => $newsId,
            'is_canceled' => 0, // 未取消收藏
        ];
        
        $favorite = self::where($where)->find();
        
        return $favorite ? $favorite->toArray() : false;
    }
    
    /**
     * 添加收藏
     * @param int $userId 用户ID
     * @param int $newsId 新闻ID
     * @return bool|array 收藏结果
     */
    public static function addFavorite($userId, $newsId)
    {
        // 检查是否已收藏
        $favorite = self::where([
            'user_id' => $userId,
            'news_id' => $newsId,
        ])->find();
        
        if ($favorite) {
            // 已收藏但被取消，则恢复收藏
            if ($favorite['is_canceled'] == 1) {
                $favorite->is_canceled = 0;
                $favorite->cancel_time = null;
                $favorite->create_time = date('Y-m-d H:i:s');
                $favorite->save();
                return $favorite->toArray();
            }
            // 已收藏未取消，返回已存在
            return $favorite->toArray();
        }
        
        // 新增收藏
        $model = new self();
        $model->user_id = $userId;
        $model->news_id = $newsId;
        $model->is_canceled = 0;
        $model->save();
        
        return $model->toArray();
    }
    
    /**
     * 取消收藏
     * @param int $userId 用户ID
     * @param int $newsId 新闻ID
     * @return bool 取消结果
     */
    public static function cancelFavorite($userId, $newsId)
    {
        $favorite = self::where([
            'user_id' => $userId,
            'news_id' => $newsId,
            'is_canceled' => 0,
        ])->find();
        
        if (!$favorite) {
            return false;
        }
        
        $favorite->is_canceled = 1;
        $favorite->cancel_time = date('Y-m-d H:i:s');
        return $favorite->save() !== false;
    }
    
    /**
     * 获取用户收藏列表
     * @param int $userId 用户ID
     * @param int $page 页码
     * @param int $limit 每页条数
     * @return array 收藏列表
     */
    public static function getUserFavoriteList($userId, $page = 1, $limit = 10)
    {
        $where = [
            'user_id' => $userId,
            'is_canceled' => 0,
        ];
        
        $list = self::where($where)
            ->with(['news' => function ($query) {
                $query->field('id,title,cover_image,publish_time,author_name');
            }])
            ->page($page, $limit)
            ->order('create_time', 'desc')
            ->select()
            ->toArray();
            
        return $list;
    }
    
    /**
     * 关联新闻表
     * @return \think\model\relation\HasOne
     */
    public function news()
    {
        return $this->hasOne(News::class, 'id', 'news_id');
    }
}