<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Spatie\ResponseCache\Facades\ResponseCache;
use App\Models\Tags;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Laravel\Scout\Searchable;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Casts\Attribute;

class Articles extends Model
{
    protected $guarded = [];
    protected $appends = ['s_created_at_diff'];
    
    use Searchable;
    
    protected function sCreatedAtDiff(): Attribute
    {
        return Attribute::get(function () {
            // 1. 别直接用 $this->created_at，防止它还没被实例化成 Carbon 对象
            $oDate = \Carbon\Carbon::parse($this->created_at);
            $oNow = \Carbon\Carbon::now();

            // 2. 计算小时差（强制转整数）
            $iHours = (int)$oDate->diffInHours($oNow);

            if ($iHours < 1) {
                // 不足 1 小时，看看是不是不足 1 分钟
                $iMinutes = (int)$oDate->diffInMinutes($oNow);
                return $iMinutes < 1 ? '刚刚' : $iMinutes . '分钟前';
            }

            if ($iHours < 24) {
                return $iHours . '小时前';
            }

            // 3. 计算天数差（强制转整数）
            $iDays = (int)$oDate->diffInDays($oNow);
            if ($iDays < 30) {
                return $iDays . '天前';
            }

            // 超过一个月直接显示日期
            return $oDate->format('Y-m-d');
        });
    }
    
    public function shouldBeSearchable(): bool
    {
        return (int)$this->iStatus === 1;
    }
    
    public function searchableAs(): string
    {
        return 'articles';
    }
    
    public function toSearchableArray(): array
    {
        // 药水哥原则：字段要精准，类型要死磕
        return [
            'id'            => (int) $this->id,
            'iCategoryId'   => (int) $this->iCategoryId,
            'sCategoryName' => (string) ($this->oCategory->sName ?? 'none'),
            'sCategorySlug' => (string) ($this->oCategory->sSlug ?? 'none'),
            'sTitle'        => (string) $this->sTitle,
            'sTitleSub'     => (string) $this->sTitleSub,
            'sSlug'         => (string) $this->sSlug,
            'sContent'      => (string) mb_substr(strip_tags($this->sContent), 0, 500),
            'iStatus'       => (int) $this->iStatus,
            'iIsTop'        => (int) $this->iIsTop,
            'updated_at'    => (int) $this->updated_at->timestamp,
        ];
    }

    /**
     * 判断当前文章是否超过分类设置的 SEO 暴露天数
     * @return bool
     */
    public function bIsSeoExpired(): bool
    {
        $oCategory = $this->oCategory;
        
        // 未关联分类，或分类下的 aOpt 没设置，默认不处理（不过期）
        if (!$oCategory || empty($oCategory->aOpt) || !isset($oCategory->aOpt['noindexday'])) {
            return false;
        }

        $iNoindexDay = (int) $oCategory->aOpt['noindexday'];

        // 0 或负数代表不限制，一直暴露给搜索引擎
        if ($iNoindexDay <= 0) {
            return false;
        }

        // 判断文章创建时间是否早于 N 天前
        $oCreateDate = \Carbon\Carbon::parse($this->created_at);
        return $oCreateDate->lt(\Carbon\Carbon::now()->subDays($iNoindexDay));
    }
    
    protected static function booted()
    {
        static::saved(function () {
              ResponseCache::forget('/'); // 要改成具体文章
        });

        static::deleted(function () {
            ResponseCache::forget('/'); // 要改成具体文章
        });
    }
    
    
    
    public function oTags(): BelongsToMany
    {
        return $this->belongsToMany(
            Tags::class,
            'article_tag',
            'iArticleId',
            'iTagId'
        );
    }
    
    public function oCategory(): BelongsTo {
        return $this->belongsTo(Categories::class, 'iCategoryId', 'id');
    }
    
    public function oUser()
    {
        return $this->belongsTo(User::class, 'iUserId', 'id');
    }
    
}