<?php

namespace Modules\Attribute\Http\Requests;

use Illuminate\Validation\Rule;
use Modules\Core\Http\Requests\Request;

class SaveProductAttributesRequest extends Request
{
    /**
     * Available attributes.
     *
     * @var string
     */
    protected $availableAttributes = 'attribute::attributes.product_attributes';

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'attributes.*.attribute_id' => ['required_with:attributes.*.values', Rule::exists('attributes', 'id')],
            'attributes.*.values' => ['required_with:attributes.*.attribute_id', Rule::exists('attribute_values', 'id')],
        ];
    }

    /**
     * Get data to be validated from the request.
     *
     * @return array
     */
    protected function validationData()
    {
        return $this->merge([
            'attributes' => $this->filter($this->get('attributes') ?? []),
        ])->all();
    }

    /**
     * Filter product attributes.
     *
     * @param array $attributes
     * @return array
     */
    private function filter($attributes = [])
    {
        return array_filter($attributes, function ($attribute) {
            return ! is_null($attribute['attribute_id']);
        });
    }
}
