<?php

namespace App\Models;

use App\Admin\Components;
use App\ModelFilters\KeywordFilter;
use EloquentFilter\Filterable;
use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;

class Keyword extends Model
{
    use Filterable;
    use HasFactory;

    protected $fillable = ['name', 'key', 'value', 'parent_id', 'parent_key', 'path', 'sort', 'lv'];

    protected function serializeDate(\DateTimeInterface $date)
    {
        return $date->format('Y-m-d H:i:s');
    }

    protected static function boot()
    {
        parent::boot();

        // 监听 Keyword 的创建事件，用于初始化 path 和 lv 字段值
        static::saving(function (Keyword $keyword) {
            if (is_null($parent = $keyword->parent)) {
                $keyword->forceFill([
                    'path' => '-',
                    'lv' => 1,
                ]);

                if ((string) $keyword->key === '') {
                    $keyword->key = Str::random(16);
                }
            } else {
                $keyword->forceFill([
                    'parent_key' => $parent->lv > 1 ? $parent->parent_key : $parent->key,
                    'path' => $parent->full_path,
                    'lv' => $parent->lv + 1,
                ]);

                if ((string) $keyword->key === '') {
                    $keyword->key = $parent->key.'_'.($parent->children()->count() + 1);
                }
            }
        });
    }

    public function parent()
    {
        return $this->belongsTo(static::class, 'parent_id');
    }

    public function children()
    {
        return $this->hasMany(static::class, 'parent_id');
    }

    public function scopeSort($q)
    {
        return $q->orderBy('sort', 'asc');
    }

    public function scopeAllChildrenOfKey($q, $parentKey)
    {
        $q->where('path', 'like', '%-'.
                        static::where('key', $parentKey)->value('id')
                .'-%' ?? '');
    }

    public static function tagsMap(string $key)
    {
        $mapArr = [];
        self::query()->where('parent_key', $key)->get()->map(function ($item) use (&$mapArr) {
            $mapArr[$item->id] = Components::make()->keywordsTag($item->name, $item->value);
        });

        return $mapArr;
    }

    protected function fullPath(): Attribute
    {
        return Attribute::make(
            get: fn (mixed $value, array $attributes) => $attributes['path'].$attributes['id'].'-',
        );
    }
}