<?php

namespace App\Komma\JsonApi;

use App\Helpers\KommaHelpers;
use App\Komma\Kms\Core\AbstractTranslatableModel;
use Illuminate\Http\Resources\Json\Resource;

class TranslatableResource extends Resource
{
    public function __construct($resource)
    {
        if (! is_a($resource, AbstractTranslatableModel::class)) {
            throw new \InvalidArgumentException('The resource must be an instance of '.AbstractTranslatableModel::class);
        }

        parent::__construct($resource);
    }

    /**
     * Transform the resource into an array.
     *
     * @param \Illuminate\Http\Request $request
     * @return array
     */
    public function toArray($request)
    {
        $attributes = $this->resource->toArray();
        $attributes['translations'] = [];

        $index = 0;
        foreach ($attributes as $key => $attribute) {
            if (is_array($attribute)) {
                array_splice($attributes, $index, 1);
            }
            $index++;
        }

        $data = [
            'id' => (string) $this->id,
            'type' => KommaHelpers::getShortNameFromClass($this->resource, true),
            'attributes' => $attributes,
        ];

        $this->resource->translation()->get()->each(function ($translation) use (&$data) {
            $data['attributes']['translation'][] = new TranslationResource($translation);
        });

        return $data;
    }
}