<?php
namespace internship\model;

use n2n\web\dispatch\Dispatchable;
use internship\bo\NewsCategory;
use internship\bo\NewsTag;
use n2n\web\dispatch\map\bind\BindingDefinition;
use n2n\impl\web\dispatch\map\val\ValNotEmpty;
use n2n\impl\web\dispatch\map\val\ValImageFile;
use n2n\io\managed\File;
use n2n\web\dispatch\map\MappingResult;
use n2n\util\io\IoUtils;
use internship\bo\NewsItem;
use n2n\web\http\PageNotFoundException;
use n2n\util\type\ArgUtils;


class NewsForm implements Dispatchable {
	private ?NewsItem $news = null;
	protected string $title;
	protected string $content;
	protected ?File $imageFile = null;
	protected array $tagIds = array();

	/**
	 * @param NewsCategory $category
	 * @param NewsTag[] $tags
	 * @param NewsItem|null $news
	 */
	public function __construct(private NewsCategory $category, private array $tags, NewsItem $news = null) {
		ArgUtils::valArray($tags, NewsTag::class);

		if ($news === null) {
			return;
		}

		$this->title = $news->getTitle();
		$this->content = $news->getContent();
		$this->id = $news->getId();
		$this->tagIds = array_map(fn(NewsTag $t) => $t->getId(), $news->getTags()->getArrayCopy());

		$this->news = $news;
	}

	public function getTitle(): ?string {
		return $this->title ?? null;
	}

	/**
	 * @param string $title
	 */
	public function setTitle(string $title) {
		$this->title = $title;
	}

	public function getImageFile(): ?File {
		return $this->imageFile;
	}

	public function setImageFile(?File $imageFile) {
		$this->imageFile = $imageFile;
	}

	/**
	 * @return array
	 */
	public function getTagIds(): array {
		return $this->tagIds;
	}

	/**
	 * @param array $tagIds
	 */
	public function setTagIds(array $tagIds): void {
		$this->tagIds = $tagIds;
	}

	/**
	 * @return string
	 */
	public function getContent(): ?string {
		return $this->content ?? null;
	}
	/**
	 * @param string $content
	 */
	public function setContent(string $content) {
		$this->content = $content;
	}
	public function getTagOptions(): array {
		return $this->tags;

	}

	private function _mapping(MappingResult $mr) {
		$mr->setLabel('title', 'Titel');
		$mr->setLabel('content', 'Beschreibung');
		$mr->setLabel('imageFile', 'Bild');
		$mr->setLabel('tagIds', 'zugewiesene Tags');
	}

	private function _validation(BindingDefinition $bd) {
		$bd->val(array('content', 'title'), new ValNotEmpty());
		$bd->val('imageFile', new ValImageFile(true));
	}


	public function save(NewsDao $newsDao) {
		$selectedTagObjects = new \ArrayObject();
		foreach ($this->tags as $tagObject) {
			if (in_array($tagObject->getId(),$this->tagIds )) {
				$selectedTagObjects[] = $tagObject;
			}
		}
		$news = $this->news ?? new NewsItem();
		$news->setTitle($this->title);
		$news->setLead(substr_replace($this->content, "...", 50));
		$news->setContent($this->content);
		$news->setImageFile($this->imageFile);
		$news->setUrlPart(strtolower(IoUtils::stripSpecialChars($this->title)));
		$news->setCategory($this->category);
		$news->setTags($selectedTagObjects);
		$newsDao->saveNews($news);
	}

	public function delete(NewsDao $newsDao) {
		if (!$this->news) {
			throw new PageNotFoundException('no id set');
		}
		$news = $this->news;
		$newsDao->deleteNews($news);
	}

}