<?php
/**
 * @copyright Copyright (c) 2016 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/>.
 *
 */

namespace OCA\Deck\Service;

use OCA\Deck\BadRequestException;
use OCA\Deck\Db\Acl;
use OCA\Deck\Db\ChangeHelper;
use OCA\Deck\Db\Label;
use OCA\Deck\Db\LabelMapper;
use OCA\Deck\StatusException;
use OCA\Deck\Validators\LabelServiceValidator;

class LabelService {

	/** @var LabelMapper */
	private $labelMapper;
	/** @var PermissionService */
	private $permissionService;
	/** @var BoardService */
	private $boardService;
	/** @var ChangeHelper */
	private $changeHelper;
	/** @var LabelServiceValidator */
	private LabelServiceValidator $labelServiceValidator;

	public function __construct(
		LabelMapper $labelMapper,
		PermissionService $permissionService,
		BoardService $boardService,
		ChangeHelper $changeHelper,
		LabelServiceValidator $labelServiceValidator
	) {
		$this->labelMapper = $labelMapper;
		$this->permissionService = $permissionService;
		$this->boardService = $boardService;
		$this->changeHelper = $changeHelper;
		$this->labelServiceValidator = $labelServiceValidator;
	}

	/**
	 * @param $labelId
	 * @return \OCP\AppFramework\Db\Entity
	 * @throws \OCA\Deck\NoPermissionException
	 * @throws \OCP\AppFramework\Db\DoesNotExistException
	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
	 * @throws BadRequestException
	 */
	public function find($labelId) {
		if (is_numeric($labelId) === false) {
			throw new BadRequestException('label id must be a number');
		}
		$this->permissionService->checkPermission($this->labelMapper, $labelId, Acl::PERMISSION_READ);
		return $this->labelMapper->find($labelId);
	}

	/**
	 * @param $title
	 * @param $color
	 * @param $boardId
	 * @return \OCP\AppFramework\Db\Entity
	 * @throws StatusException
	 * @throws \OCA\Deck\NoPermissionException
	 * @throws \OCP\AppFramework\Db\DoesNotExistException
	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
	 * @throws BadRequestException
	 */
	public function create($title, $color, $boardId) {
		$this->labelServiceValidator->check(compact('title', 'color', 'boardId'));

		$this->permissionService->checkPermission(null, $boardId, Acl::PERMISSION_MANAGE);

		$boardLabels = $this->labelMapper->findAll($boardId);
		foreach ($boardLabels as $boardLabel) {
			if ($boardLabel->getTitle() === $title) {
				throw new BadRequestException('title must be unique');
				break;
			}
		}

		if ($this->boardService->isArchived(null, $boardId)) {
			throw new StatusException('Operation not allowed. This board is archived.');
		}
		$label = new Label();
		$label->setTitle($title);
		$label->setColor($color);
		$label->setBoardId($boardId);
		$this->changeHelper->boardChanged($boardId);
		return $this->labelMapper->insert($label);
	}

	/**
	 * @param $id
	 * @return \OCP\AppFramework\Db\Entity
	 * @throws StatusException
	 * @throws \OCA\Deck\NoPermissionException
	 * @throws \OCP\AppFramework\Db\DoesNotExistException
	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
	 * @throws BadRequestException
	 */
	public function delete($id) {
		$this->labelServiceValidator->check(compact('id'));

		$this->permissionService->checkPermission($this->labelMapper, $id, Acl::PERMISSION_MANAGE);
		if ($this->boardService->isArchived($this->labelMapper, $id)) {
			throw new StatusException('Operation not allowed. This board is archived.');
		}
		$label = $this->labelMapper->delete($this->find($id));
		$this->changeHelper->boardChanged($label->getBoardId());
		return $label;
	}

	/**
	 * @param $id
	 * @param $title
	 * @param $color
	 * @return \OCP\AppFramework\Db\Entity
	 * @throws StatusException
	 * @throws \OCA\Deck\NoPermissionException
	 * @throws \OCP\AppFramework\Db\DoesNotExistException
	 * @throws \OCP\AppFramework\Db\MultipleObjectsReturnedException
	 * @throws BadRequestException
	 */
	public function update($id, $title, $color) {
		$this->labelServiceValidator->check(compact('title', 'color', 'id'));

		$this->permissionService->checkPermission($this->labelMapper, $id, Acl::PERMISSION_MANAGE);

		$label = $this->find($id);

		$boardLabels = $this->labelMapper->findAll($label->getBoardId());
		foreach ($boardLabels as $boardLabel) {
			if ($boardLabel->getId() === $label->getId()) {
				continue;
			}
			if ($boardLabel->getTitle() === $title) {
				throw new BadRequestException('title must be unique');
				break;
			}
		}

		if ($this->boardService->isArchived($this->labelMapper, $id)) {
			throw new StatusException('Operation not allowed. This board is archived.');
		}

		$label->setTitle($title);
		$label->setColor($color);
		$this->changeHelper->boardChanged($label->getBoardId());
		return $this->labelMapper->update($label);
	}
}
