<?php

namespace App\Komma\Kms\Core\Tree;

use App\Komma\Kms\Core\AbstractTranslatableModel;
use App\Komma\Kms\Core\AbstractTranslationModel;
use App\Komma\Kms\Core\Attributes\Models\Traits\HasThumbnailInterface;
use App\Komma\Kms\Core\Attributes\Models\Traits\HasThumbnailTrait;
use App\Komma\Kms\Core\HasRoutesInterface;
use App\Komma\Kms\Core\NestedSets\Nodes\TreeModelInterface;
use Illuminate\Http\Resources\Json\Resource;

/**
 * Class TreeResource
 *
 * A Tree resource. Used for Converting TreeModelInterfaces to json
 * Representing the models you give it in a tree fashioned way.
 *
 * @see TreeResourceCollection
 */
class TreeResource extends Resource
{
    public function toArray($request)
    {
        if (! is_a($this->resource, TreeModelInterface::class)) {
            throw new \RuntimeException('The item that you put into a '.self::class.' must be an '.TreeModelInterface::class.' instance');
        }

        $thumbnail = '';
        if (is_a($this->resource, HasThumbnailInterface::class)) {
            /** @var HasThumbnailTrait $resource $ */
            $resource = $this->resource;
            $thumbnail = $resource->getThumbnail();
        }

        $data = [
            'id' => $this->id,
            'title' => $this->getSideBarName(),
            'thumbnail' => $thumbnail,
            'status' => 1,
        ];

        if (is_a($this->resource, AbstractTranslatableModel::class)) {
            /** @var $this HasRoutesInterface|TreeResource */
            $data['routes'] = $this->retrieveRoutes();
        }

        if ($this->lft + 1 != $this->right) {
            $data['children'] = new TreeResourceCollection(collect($this->findChildren()));
        } else {
            $data['children'] = [];
        }

        return $data;
    }

    /**
     * Returns an array keyed by language id having route alias attributes as values
     *
     * @return array
     */
    private function retrieveRoutes()
    {
        //Create empty Routes array
        $routes = [];
        //If there are no translations, return empty array
        if (! isset($this->translations)) {
            return $routes;
        }

        //Loop trough the translations
        foreach ($this->translations as $translation) {
            /** @var AbstractTranslationModel $translation */

            //Get the primary route, if non existing, skip to the next language
            if (! $route = $translation->route) {
                continue;
            }

            //Set the alias based on the language id
            $routes[$translation->language_id] = $route->alias;
        }

        //Return the array of routes
        return $routes;
    }
}