<?php

declare(strict_types=1);


/**
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Maxence Lange <maxence@artificial-owl.com>
 * @copyright 2019
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


namespace OCA\Deck\Provider;

use OC\FullTextSearch\Model\IndexDocument;
use OC\FullTextSearch\Model\SearchTemplate;
use OCA\Deck\Service\FullTextSearchService;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\AppFramework\Db\MultipleObjectsReturnedException;
use OCP\FullTextSearch\IFullTextSearchPlatform;
use OCP\FullTextSearch\IFullTextSearchProvider;
use OCP\FullTextSearch\Model\IIndex;
use OCP\FullTextSearch\Model\IIndexDocument;
use OCP\FullTextSearch\Model\IIndexOptions;
use OCP\FullTextSearch\Model\IRunner;
use OCP\FullTextSearch\Model\ISearchRequest;
use OCP\FullTextSearch\Model\ISearchResult;
use OCP\FullTextSearch\Model\ISearchTemplate;
use OCP\IL10N;
use OCP\IURLGenerator;

/**
 * Class DeckProvider
 *
 * @package OCA\Deck\Provider
 */
class DeckProvider implements IFullTextSearchProvider {
	public const DECK_PROVIDER_ID = 'deck';


	/** @var IL10N */
	private $l10n;

	/** @var IUrlGenerator */
	private $urlGenerator;

	/** @var FullTextSearchService */
	private $fullTextSearchService;


	/** @var IRunner */
	private $runner;

	/** @var IIndexOptions */
	private $indexOptions = [];


	/**
	 * DeckProvider constructor.
	 *
	 * @param IL10N $l10n
	 * @param IUrlGenerator $urlGenerator
	 * @param FullTextSearchService $fullTextSearchService
	 */
	public function __construct(
		IL10N $l10n, IUrlGenerator $urlGenerator, FullTextSearchService $fullTextSearchService
	) {
		$this->l10n = $l10n;
		$this->urlGenerator = $urlGenerator;
		$this->fullTextSearchService = $fullTextSearchService;
	}


	/**
	 * return unique id of the provider
	 */
	public function getId(): string {
		return self::DECK_PROVIDER_ID;
	}


	/**
	 * return name of the provider
	 */
	public function getName(): string {
		return 'Deck';
	}


	/**
	 * @return array
	 */
	public function getConfiguration(): array {
		return [];
	}


	/**
	 * @param IRunner $runner
	 */
	public function setRunner(IRunner $runner) {
		$this->runner = $runner;
	}


	/**
	 * @param IIndexOptions $options
	 */
	public function setIndexOptions(IIndexOptions $options) {
		$this->indexOptions = $options;
	}


	public function getSearchTemplate(): ISearchTemplate {
		/** @psalm-var ISearchTemplate */
		$template = new SearchTemplate('icon-deck', 'icons');

		return $template;
	}


	/**
	 *
	 */
	public function loadProvider() {
	}


	/**
	 * @param string $userId
	 *
	 * @return string[]
	 */
	public function generateChunks(string $userId): array {
		return [];
	}


	/**
	 * @param string $userId
	 * @param string $chunk
	 *
	 * @return IIndexDocument[]
	 */
	public function generateIndexableDocuments(string $userId, string $chunk): array {
		$cards = $this->fullTextSearchService->getCardsFromUser($userId);

		$documents = [];
		foreach ($cards as $card) {
			$documents[] = $this->fullTextSearchService->generateIndexDocumentFromCard($card);
		}

		return $documents;
	}


	/**
	 * @param IIndexDocument $document
	 *
	 * @throws DoesNotExistException
	 * @throws MultipleObjectsReturnedException
	 */
	public function fillIndexDocument(IIndexDocument $document) {
		$this->fullTextSearchService->fillIndexDocument($document);
		$this->updateRunnerInfo('info', $document->getTitle());
	}


	/**
	 * @param IIndexDocument $document
	 *
	 * @return bool
	 */
	public function isDocumentUpToDate(IIndexDocument $document): bool {
		return false;
	}


	/**
	 * @param IIndex $index
	 *
	 * @return IIndexDocument
	 * @throws DoesNotExistException
	 * @throws MultipleObjectsReturnedException
	 */
	public function updateDocument(IIndex $index): IIndexDocument {
		/** @psalm-var IIndexDocument */
		$document = new IndexDocument(DeckProvider::DECK_PROVIDER_ID, $index->getDocumentId());
		$document->setIndex($index);

		$this->fullTextSearchService->fillIndexDocument($document);

		return $document;
	}


	/**
	 * @param IFullTextSearchPlatform $platform
	 */
	public function onInitializingIndex(IFullTextSearchPlatform $platform) {
	}


	/**
	 * @param IFullTextSearchPlatform $platform
	 */
	public function onResettingIndex(IFullTextSearchPlatform $platform) {
	}


	/**
	 * not used yet
	 */
	public function unloadProvider() {
	}


	/**
	 * before a search, improve the request
	 *
	 * @param ISearchRequest $request
	 */
	public function improveSearchRequest(ISearchRequest $searchRequest) {
	}


	/**
	 * after a search, improve results
	 *
	 * @param ISearchResult $searchResult
	 */
	public function improveSearchResult(ISearchResult $searchResult) {
		foreach ($searchResult->getDocuments() as $document) {
			try {
				$board =
					$this->fullTextSearchService->getBoardFromCardId((int)$document->getId());
				$path = '#/board/' . $board->getId() . '/card/' . $document->getId();
				$document->setLink($this->urlGenerator->linkToRoute('deck.page.index') . $path);
			} catch (DoesNotExistException $e) {
			} catch (MultipleObjectsReturnedException $e) {
			}
		}
	}


	/**
	 * @param string $info
	 * @param string $value
	 */
	private function updateRunnerInfo(string $info, string $value) {
		if ($this->runner === null) {
			return;
		}

		$this->runner->setInfo($info, $value);
	}
}