<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class SongLibraryCache extends Model
{
    protected $table = 'song_library_cache';
    protected $primaryKey = 'song_id';
    public $incrementing = true;
    protected $keyType = 'int';
    const CREATED_AT = null;
    const UPDATED_AT = 'updated_at';

    // 可寫入的欄位（可依需要擴充）
    protected $fillable = [
        'song_name',
        'song_simplified',
        'phonetic_abbr',
        'pinyin_abbr',
        'strokes_abbr',
        'song_number',
        'artistA',
        'artistB',
        'artistA_simplified',
        'artistB_simplified',
        'artistA_category',
        'artistB_category',
        'artist_category',
        'song_filename',
        'song_category',
        'language_name',
        'add_date',
        'situation',
        'vocal',
        'db_change',
        'song_counts',
        'updated_at',
    ];
    public function users(){
        return $this->belongsToMany(User::class, 'user_song')->withTimestamps();
    }
    public function str_artists_plus(): string
    {
        return ($this->artistB!=null) ? $this->artistA ." + ".$this->artistB :$this->artistA;
    }
    public function artists(){
        return $this->belongsToMany(Artist::class);
    }
    public function str_categories(){
        return $this->categories->pluck('name')->implode(', ');
    }
    public function categories(){
        return $this->belongsToMany(SongCategory::class);
    }
}