<?php

namespace App\Komma\Pages\Kms;

use App\Komma\Documents\Kms\DocumentableInterface;
use App\Komma\Kms\Core\AbstractTranslatableModel;
use App\Komma\Kms\Core\Attributes\Attribute;
use App\Komma\Kms\Core\HasRoutesInterface;
use App\Komma\Kms\Core\NestedSets\Nodes\TreeModel;
use App\Komma\Kms\Core\NestedSets\Nodes\TreeModelInterface;
use App\Komma\Kms\Core\Sections\SectionService;
use App\Komma\Kms\Core\Sections\SectionTabItem;
use App\Komma\Languages\Models\Language;
use App\Komma\Pages\Models\Page;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Model;

class PageService extends SectionService
{
    protected $sortable = true;

    public function __construct()
    {
        $this->forModelName = Page::class;

        parent::__construct();
    }

    /**
     * This method will save an model
     *
     * @param $model Model or null
     * @param Collection $sectionTabItems These must be filled with data. This is something you need to do yourself.
     *
     * @return mixed
     */
    public function saveModel(Model $model = null, Collection $sectionTabItems): Model
    {
        /** @var TreeModel $model */
        //Process Page Specific attributes

        $sectionTabItems->each(function ($sectionTabItem, $key) use ($model) {
            /** @var SectionTabItem $sectionTabItem */
            $attribute = $sectionTabItem->getAttribute();

            $reference = $attribute->getsValueFromReference();
            switch ($attribute->getsValueFrom()) {
                case Attribute::ValueFromModel:
                    if ($reference == 'parent_id') {
                        // Get parent_id of the input
                        $parentId = $attribute->getValue();
                        $parentPage = $model->find($parentId);

                        // Set default to false
                        $currentParentId = null;

                        // Check if model id isset so if it is a new model or not
                        // if true then get current parent_id
                        if ($model->id) {
                            $currentParentId = $model->getParentId();
                        }

                        //Check if parent page is found, model isset and parent page id isn't the current parent id
                        if ($parentPage && $model && $parentPage->id !== $currentParentId) {
                            $model->makeLastChildOf($parentPage);
                        }

                        $attribute->mapValueFrom(Attribute::ValueFromItself, ''); //unset parent_id it so it won't get saved directly on the model in the parent_id field. The makeLastChildOf call above does save the parent id via lft rgt
                    }
                    break;
                case Attribute::ValueFromTranslationModel:
                    if ($reference == 'name') {
                        /** @var Language $language */
                        $language = $attribute->getAssociatedLanguage();
                        $translation = $this->getTranslationModelForModelByLanguage($model, $language);
                        $translation['slug'] = (str_slug($attribute->getValue()));
                        //Saving is done by the parent
                    }
                    break;
            }
        });

        $model->save(); //Save the page
        $model = parent::saveModel($model, $sectionTabItems); //First make sure we have a model and save the attributes in them from the SectionTabItem attributes
        $this->siteService->linkModelToCurrentSite($model);

        //Return the page
        return $model;
    }

    /**
     * Fills non-product specific attributes. Product specific attributes are processed in the parent
     *
     *
     * @param Collection $sectionTabItems A collection containing implementations AbstractSectionTabItem's
     * @param Model $model
     * @return Collection
     */
    public function fillAttributesWithData(Collection $sectionTabItems, Model $model)
    {
        $filledAttributesCollection = parent::fillAttributesWithData($sectionTabItems, $model);

        $sectionTabItems->each(
            function ($sectionTabItem, $key) use ($model, $filledAttributesCollection, &$quantityDiscountAttribute, &$quantityPriceAttribute) {
                /** @var $sectionTabItem SectionTabItem */
                if (! is_a($sectionTabItem->getAttribute(), Attribute::class)) {
                    throw new \InvalidArgumentException('One of the attributes in a AbstractSectionTabItem instance is not but must be an child instance of Attribute.');
                }
                $attribute = $sectionTabItem->getAttribute();

                $valueReference = $sectionTabItem->getAttribute()->getsValueFromReference();
                switch ($valueReference) {
                    case 'site_name':
                        $site = $this->siteService->getCurrentSite();
                        $attribute->setValue($site->name);
                        break;
                    case 'link':

                        $link = '';

                        $language = $attribute->getAssociatedLanguage();
                        $translation = $this->getTranslationModelForModelByLanguage($model, $language);

                        if (isset($translation->route)) {
                            $link = '/';
                            if ($translation->route->alias != '/') {
                                $link .= $translation->route->alias;
                            }
                        }

                        $attribute->setLink($link)->setLinkText($link);
                        break;
                }
            }
        );

        return $filledAttributesCollection;
    }

    /**
     * This method will remove an TranslatableModelInterface instance
     *
     * @param $model
     * @throws \Exception
     */
    public function destroyModel(Model $model)
    {
        /** @var Model|TreeModelInterface $model */

        //delete the images
        if (is_a($model, DocumentableInterface::class)) {
            /** @var DocumentableInterface $model */
            $this->documentService->deleteDocumentsForModel($model);
        }

        if (is_a($model, AbstractTranslatableModel::class)) {
            /** @var AbstractTranslatableModel $model */
            foreach ($model->translations()->get() as $translation) {
                //Delete the route of the translation
                if (is_a($translation, HasRoutesInterface::class)) {
                    /** @var HasRoutesInterface $translation */
                    $translation->routes()->delete();
                }

                //Delete the translation
                $translation->delete();
            }
        }

        collect($model->findChildren())->each(function (Model $childModel) {
            $this->destroyModel($childModel);
        });
        $model->delete();
    }
}