<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class News extends Model
{
    use SoftDeletes;

    protected $fillable = [
        'title',
        'slug',
        'category',
        'summary',
        'body',
        'cover',
        'status',
        'published_at',
        'seo_title',
        'seo_description',
    ];

    protected $casts = [
        'published_at' => 'datetime',
    ];

    public const CATEGORIES = [
        'industry' => '行业资讯',
        'company'  => '公司动态',
        'event'    => '展会活动',
    ];

    public function scopePublished($query)
    {
        return $query->where('status', 'published')
            ->whereNotNull('published_at')
            ->orderByDesc('published_at');
    }

    public function categoryLabel(): string
    {
        return self::CATEGORIES[$this->category] ?? $this->category ?? '—';
    }

    public function seoTitle(): string
    {
        return $this->seo_title ?: $this->title;
    }

    public function seoDescription(): string
    {
        return $this->seo_description ?: ($this->summary ?: $this->title);
    }
}