<?php

namespace App\Models;

use App\Casts\JsonArray;
use App\Casts\Price;
use Dcat\Admin\Traits\HasDateTimeFormatter;
use Illuminate\Database\Eloquent\Model;

class ProductSpu extends Model
{
    use HasDateTimeFormatter;

    protected $casts = [
        'images' => JsonArray::class,
        'sell_price' => Price::class,
        'market_price' => Price::class,
        'cost_price' => Price::class,
        'vip_price' => Price::class,
        'attrs' => JsonArray::class,
        'release_at' => 'datetime',
    ];

    /**
     * @var array
     */
    protected $fillable = [
        'name',
        'subtitle',
        'category_id',
        'codcovere',
        'images',
        'sell_price',
        'market_price',
        'cost_price',
        'vip_price',
        'media',
        'weight',
        'attrs',
        'stock',
        'sales',
        'release_at',
    ];

    public function skus()
    {
        return $this->hasMany(ProductSku::class, 'spu_id');
    }

    public function specs()
    {
        return $this->hasMany(ProductSpuSpec::class, 'product_spu_id');
    }

    public function features()
    {
        return $this->belongsToMany(ProductFeature::class, 'product_spu_features', 'feature_id', 'spu_id');
    }

    /**
     * 确认此主商品是否有 sku
     *
     * @return bool
     */
    public function hasSku(): bool
    {
        return $this->skus()->exists();
    }

    /**
     * 确认给定的 SKU 是否有效
     *
     * @param \App\Models\ProductSku $sku
     * @return bool
     */
    public function isValidProductSku(ProductSku $sku): bool
    {
        if ($this->getKey() !== $sku->spu_id) {
            return false;
        }

        if (count($specs = (array) $sku->specs) === $this->specs->count()) {
            foreach ($this->specs as $spec) {
                $key = $spec->getKey();

                if (! array_key_exists($key, $specs) || ! in_array($specs[$key], $spec->items)) {
                    return false;
                }
            }

            return true;
        }

        return false;
    }
}