/*
 * LinShare is an open source filesharing software, part of the LinPKI software
 * suite, developed by Linagora.
 * 
 * Copyright (C) 2015 LINAGORA
 * 
 * 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, provided you comply with the Additional Terms applicable for
 * LinShare software by Linagora pursuant to Section 7 of the GNU Affero General
 * Public License, subsections (b), (c), and (e), pursuant to which you must
 * notably (i) retain the display of the “LinShare™” trademark/logo at the top
 * of the interface window, the display of the “You are using the Open Source
 * and free version of LinShare™, powered by Linagora © 2009–2015. Contribute to
 * Linshare R&D by subscribing to an Enterprise offer!” infobox and in the
 * e-mails sent with the Program, (ii) retain all hypertext links between
 * LinShare and linshare.org, between linagora.com and Linagora, and (iii)
 * refrain from infringing Linagora intellectual property rights over its
 * trademarks and commercial brands. Other Additional Terms apply, see
 * <http://www.linagora.com/licenses/> for more details.
 * 
 * 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 and
 * its applicable Additional Terms for LinShare along with this program. If not,
 * see <http://www.gnu.org/licenses/> for the GNU Affero General Public License
 * version 3 and <http://www.linagora.com/licenses/> for the Additional Terms
 * applicable to LinShare software.
 */
package org.linagora.linshare.core.facade.webservice.admin.impl;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.commons.lang.Validate;
import org.linagora.linshare.core.domain.constants.Language;
import org.linagora.linshare.core.domain.constants.MailContentType;
import org.linagora.linshare.core.domain.constants.Role;
import org.linagora.linshare.core.domain.entities.AbstractDomain;
import org.linagora.linshare.core.domain.entities.MailConfig;
import org.linagora.linshare.core.domain.entities.MailContent;
import org.linagora.linshare.core.domain.entities.MailFooter;
import org.linagora.linshare.core.domain.entities.MailLayout;
import org.linagora.linshare.core.domain.entities.User;
import org.linagora.linshare.core.exception.BusinessErrorCode;
import org.linagora.linshare.core.exception.BusinessException;
import org.linagora.linshare.core.facade.webservice.admin.MailConfigFacade;
import org.linagora.linshare.core.service.AbstractDomainService;
import org.linagora.linshare.core.service.AccountService;
import org.linagora.linshare.core.service.MailConfigService;
import org.linagora.linshare.webservice.dto.MailConfigDto;
import org.linagora.linshare.webservice.dto.MailContentDto;
import org.linagora.linshare.webservice.dto.MailFooterDto;

import com.google.common.collect.Sets;

public class MailConfigFacadeImpl extends AdminGenericFacadeImpl implements
		MailConfigFacade {

	private final MailConfigService mailConfigService;

	private final AbstractDomainService abstractDomainService;

	public MailConfigFacadeImpl(final AccountService accountService,
			final MailConfigService mailConfigService,
			final AbstractDomainService abstractDomainService) {
		super(accountService);
		this.mailConfigService = mailConfigService;
		this.abstractDomainService = abstractDomainService;
	}

	@Override
	public Set<MailConfigDto> findAll(String domainId, boolean only)
			throws BusinessException {
		User user = checkAuthentication(Role.ADMIN);
		if (domainId == null) {
			domainId = user.getDomainId();
		}

		AbstractDomain domain = abstractDomainService.retrieveDomain(domainId);
		// TODO : check if the current user has the right to get MailConfig of
		// this domain
		Set<MailConfigDto> mailConfigsDto = new HashSet<MailConfigDto>();
		Iterable<MailConfig> configs = only ? domain.getMailConfigs()
				: mailConfigService.findAllConfigs(user, domainId);
		for (MailConfig mailConfig : configs) {
			mailConfigsDto.add(new MailConfigDto(mailConfig));
		}
		return mailConfigsDto;
	}

	@Override
	public MailConfigDto find(String uuid) throws BusinessException {
		User actor = checkAuthentication(Role.ADMIN);
		return new MailConfigDto(findConfig(actor, uuid));
	}

	@Override
	public MailConfigDto create(MailConfigDto dto) throws BusinessException {
		User actor = checkAuthentication(Role.ADMIN);
		MailConfig config = new MailConfig();
		transform(config, dto);
		return new MailConfigDto(mailConfigService.createConfig(actor, config));
	}

	@Override
	public MailConfigDto update(MailConfigDto dto) throws BusinessException {
		User actor = checkAuthentication(Role.ADMIN);
		MailConfig config = findConfig(actor, dto.getUuid());
		transform(config, dto);
		config.setMailLayoutHtml(findLayout(actor, dto.getMailLayoutHtml()));
		config.setMailLayoutText(findLayout(actor, dto.getMailLayoutText()));
		return new MailConfigDto(mailConfigService.updateConfig(actor, config));
	}

	@Override
	public void delete(String uuid) throws BusinessException {
		User actor = checkAuthentication(Role.ADMIN);
		mailConfigService.deleteConfig(actor, uuid);
	}

	@Override
	public Set<MailContentDto> findAllContents(String mailConfigUuid,
			String mailContentType, String language) throws BusinessException {
		User actor = checkAuthentication(Role.ADMIN);
		Validate.notEmpty(mailConfigUuid, "mailConfigUuid must be set.");
		Validate.notEmpty(mailContentType, "mailContentType must be set.");
		Validate.notEmpty(language, "language must be set.");

		MailConfig cfg = mailConfigService.findConfigByUuid(actor, mailConfigUuid);
		MailContentType type = MailContentType.valueOf(mailContentType.toUpperCase());
		Language lang = Language.valueOf(language.toUpperCase());
		Set<MailContentDto> ret = Sets.newHashSet();

		List<MailContent> all = mailConfigService.findAllContents(actor,
				cfg.getDomain().getIdentifier());
		for (MailContent mc : all) {
			if (mc.getLanguage() == lang.toInt()
					&& mc.getMailContentType() == type.toInt()) {
				ret.add(new MailContentDto(mc));
			}
		}
		return ret;
	}

	@Override
	public Set<MailFooterDto> findAllFooters(String mailConfigUuid,
			String language) throws BusinessException {
		User actor = checkAuthentication(Role.ADMIN);
		Validate.notEmpty(mailConfigUuid, "mailConfigUuid must be set.");
		Validate.notEmpty(language, "language must be set.");

		MailConfig cfg = mailConfigService.findConfigByUuid(actor, mailConfigUuid);
		Language lang = Language.valueOf(language.toUpperCase());
		Set<MailFooterDto> ret = Sets.newHashSet();

		List<MailFooter> all = mailConfigService.findAllFooters(actor, cfg
				.getDomain().getIdentifier());
		for (MailFooter footer : all) {
			if (footer.getLanguage() == lang.toInt()) {
				ret.add(new MailFooterDto(footer));
			}
		}
		return ret;
	}

	/*
	 * Helpers
	 */

	private void transform(MailConfig config, MailConfigDto dto)
			throws BusinessException {
		config.setDomain(findDomain(dto.getDomain()));
		config.setName(dto.getName());
		config.setVisible(dto.isVisible());
	}

	private MailConfig findConfig(User actor, String uuid)
			throws BusinessException {
		MailConfig config = mailConfigService.findConfigByUuid(actor, uuid);

		if (config == null) {
			throw new BusinessException(BusinessErrorCode.MAILCONFIG_NOT_FOUND,
					"Mail config " + uuid + " doesn't exist.");
		}
		return config;
	}

	private MailLayout findLayout(User actor, String uuid)
			throws BusinessException {
		MailLayout mailLayout = mailConfigService.findLayoutByUuid(actor, uuid);

		if (mailLayout == null)
			throw new BusinessException(BusinessErrorCode.MAILLAYOUT_NOT_FOUND,
					uuid + " not found.");
		return mailLayout;
	}

	private AbstractDomain findDomain(String id) throws BusinessException {
		AbstractDomain domain = abstractDomainService.retrieveDomain(id);

		if (domain == null) {
			throw new BusinessException(BusinessErrorCode.DOMAIN_DO_NOT_EXIST,
					"Domain " + id + "doesn't exist.");
		}
		return domain;
	}
}
