<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Storage;
use Spatie\Translatable\HasTranslations;

class NewsParagraph extends Model
{
    use HasTranslations;
    CONST IMAGE = 1;
    CONST TEXT = 2;

    protected $guarded = ['id'];
    public $timestamps = false;
    protected $appends = ['paragraph_img'];
    public $translatable = ['img_alt', 'text_content'];
    protected $casts = [
        'text_content' => 'array',         // JSON 轉陣列
    ];

    public function news(){
        return $this->belongsTo(News::class);
    }
    protected function paragraphImg(): Attribute
    {
        return Attribute::make(
            get: fn ($value) => is_null($this->img_url) ? null :Storage::url($this->img_url),
        );
    }

    public function contentType()
    {
        switch ($this->paragraph_type){
            case 1:
                return "image";
            case 2:
                return "text";
            default:
                return "";
        }
    }
    /**
     * 取得特定語言的文字內容
     */
    public function getTextContent($locale = 'zh_TW'): string
    {
        if ($this->paragraph_type != 2) {
            return '';
        }

        $content = $this->text_content;

        if (is_array($content)) {
            return $content[$locale] ?? '';
        }

        if (is_string($content)) {
            $decoded = json_decode($content, true);
            return $decoded[$locale] ?? '';
        }
        return '';
    }
}
