<?php
/*
 * @copyright Copyright (c) 2021 Julius Härtl <jus@bitgrid.net>
 *
 * @author Julius Härtl <jus@bitgrid.net>
 *
 * @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/>.
 *
 */

declare(strict_types=1);


namespace OCA\Richdocuments\Template;

use OCA\Richdocuments\TemplateManager;
use OCP\Files\File;
use OCP\Files\NotFoundException;
use OCP\Files\Template\ICustomTemplateProvider;
use OCP\Files\Template\ITemplateManager;
use OCP\Files\Template\Template;
use OCP\IURLGenerator;

class CollaboraTemplateProvider implements ICustomTemplateProvider {
	/** @var TemplateManager */
	private $templateManager;
	/** @var IURLGenerator */
	private $urlGenerator;
	/** @var ITemplateManager */
	private $coreTemplateManager;

	public function __construct(TemplateManager $templateManager, IURLGenerator $urlGenerator, ITemplateManager $coreTemplateManager) {
		$this->templateManager = $templateManager;
		$this->urlGenerator = $urlGenerator;
		$this->coreTemplateManager = $coreTemplateManager;
	}

	public function getTemplateType(): string {
		return CollaboraTemplateProvider::class;
	}

	public function getCustomTemplates(string $mimetype): array {
		if (in_array($mimetype, TemplateManager::MIMES_DOCUMENTS)) {
			$type = 'document';
		} elseif (in_array($mimetype, TemplateManager::MIMES_SHEETS)) {
			$type = 'spreadsheet';
		} elseif (in_array($mimetype, TemplateManager::MIMES_PRESENTATIONS)) {
			$type = 'presentation';
		} elseif (in_array($mimetype, TemplateManager::MIMES_DRAWINGS)) {
			$type = 'drawing';
		} else {
			return [];
		}

		$collaboraTemplates = $this->isSameUserTemplateFolder() ? $this->templateManager->getSystem($type) : $this->templateManager->getAll($type);

		return array_map(function (File $file) {
			$template = new Template(CollaboraTemplateProvider::class, (string)$file->getId(), $file);
			$template->setCustomPreviewUrl($this->urlGenerator->linkToRouteAbsolute('richdocuments.templates.getPreview', ['fileId' => $file->getId()]));
			return $template;
		}, $collaboraTemplates);
	}

	private function isSameUserTemplateFolder(): bool {
		try {
			$userTemplatesFolder = $this->templateManager->getUserTemplateDir();
			$internalPath = $userTemplatesFolder->getInternalPath();
			$userTemplatePath = mb_strpos($internalPath, 'files/') === 0 ? mb_substr($internalPath, 5): $internalPath;
			return $this->coreTemplateManager->getTemplatePath() === $userTemplatePath;
		} catch (NotFoundException $e) {
		}
		return false;
	}

	public function getCustomTemplate(string $template): File {
		return $this->templateManager->get((int)$template);
	}
}