/*
 * 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.auth.impl;

import java.util.List;

import org.linagora.linshare.core.domain.constants.LogAction;
import org.linagora.linshare.core.domain.entities.AbstractDomain;
import org.linagora.linshare.core.domain.entities.Account;
import org.linagora.linshare.core.domain.entities.Internal;
import org.linagora.linshare.core.domain.entities.User;
import org.linagora.linshare.core.domain.entities.UserLogEntry;
import org.linagora.linshare.core.exception.BusinessException;
import org.linagora.linshare.core.facade.auth.AuthentificationFacade;
import org.linagora.linshare.core.repository.InternalRepository;
import org.linagora.linshare.core.service.AbstractDomainService;
import org.linagora.linshare.core.service.LogEntryService;
import org.linagora.linshare.core.service.UserProviderService;
import org.linagora.linshare.core.service.UserService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AuthentificationFacadeImpl implements AuthentificationFacade {

	private static final Logger logger = LoggerFactory.getLogger(AuthentificationFacadeImpl.class);

	private final UserService userService;

	private final LogEntryService logEntryService;

	private final AbstractDomainService abstractDomainService;

	private final UserProviderService userProviderService;

	private final InternalRepository internalRepository;

	public AuthentificationFacadeImpl(UserService userService, LogEntryService logEntryService,
			AbstractDomainService abstractDomainService, UserProviderService userProviderService,
			InternalRepository internalRepository) {
		super();
		this.userService = userService;
		this.logEntryService = logEntryService;
		this.abstractDomainService = abstractDomainService;
		this.userProviderService = userProviderService;
		this.internalRepository = internalRepository;
	}

	@Override
	public User loadUserDetails(String uuid) throws BusinessException {
		return userService.findByLsUuid(uuid);
	}

	@Override
	public User findOrCreateUser(String domainIdentifier, String mail)
			throws BusinessException {
		return userService.findOrCreateUser(mail, domainIdentifier);
	}

	@Override
	public void logAuthError(String login, String domainIdentifier,
			String message) throws BusinessException {
		logEntryService.create(new UserLogEntry(login, domainIdentifier,
				LogAction.USER_AUTH_FAILED, message));
	}

	@Override
	public void logAuthError(User user, String message)
			throws BusinessException {
		user = userService.findByLsUuid(user.getLsUuid());
		logEntryService.create(new UserLogEntry(user,
				LogAction.USER_AUTH_FAILED, message, user));
	}

	@Override
	public void logAuthError(User user, String domainIdentifier, String message)
			throws BusinessException {
		// Reloading entity inside a new transaction/session.
		user = userService.findByLsUuid(user.getLsUuid());
		logEntryService.create(new UserLogEntry(user,
				LogAction.USER_AUTH_FAILED, message, user));
	}

	@Override
	public void logAuthSuccess(User user) throws BusinessException {
		// Reloading entity inside a new transaction/session.
		user = userService.findByLsUuid(user.getLsUuid());
		logEntryService.create(new UserLogEntry(user,
				LogAction.USER_AUTH, "Successfull authentification"));
	}

	@Override
	public AbstractDomain retrieveDomain(String domainIdentifier) {
		return abstractDomainService.retrieveDomain(domainIdentifier);
	}

	@Override
	public List<String> getAllSubDomainIdentifiers(String domainIdentifier) {
		return abstractDomainService.getAllSubDomainIdentifiers(domainIdentifier);
	}

	@Override
	public List<AbstractDomain> getAllDomains() {
		return abstractDomainService.getAllDomains();
	}

	@Override
	public User ldapAuth(String domainIdentifier, String login,
			String userPasswd) throws BusinessException {
		AbstractDomain domain = abstractDomainService.retrieveDomain(domainIdentifier);
		return userProviderService.auth(domain.getUserProvider(), login, userPasswd);
	}

	@Override
	public User ldapSearchForAuth(String domainIdentifier, String login)
			throws BusinessException {
		AbstractDomain domain = abstractDomainService.retrieveDomain(domainIdentifier);
		return userProviderService.searchForAuth(domain.getUserProvider(), login);
	}

	@Override
	public Internal findByLogin(String login) {
		Internal internal = internalRepository.findByLogin(login);
		// Ugly but needed until we find a more elegant solution :(
		if (internal != null) internal.getDomain().getUuid();
		return internal;
	}

	@Override
	public Internal findByLoginAndDomain(String domain, String login) {
		Internal internal = internalRepository.findByLoginAndDomain(domain, login);
		// Ugly but needed until we find a more elegant solution :(
		if (internal != null) internal.getDomain().getUuid();
		return internal;
	}

	@Override
	public User updateUser(User user) throws BusinessException {
		Account system = internalRepository.getBatchSystemAccount();
		return userService.updateUser(system, user, user.getDomainId());
	}

	@Override
	public User checkStillInLdap(User user, String login) throws BusinessException {
		logger.debug("User found in DB : "
				+ user.getAccountRepresentation());
		logger.debug("The user domain stored in DB was : "
				+ user.getDomainId());
		if(ldapSearchForAuth(
				user.getDomainId(), login) == null) {
			// The previous user found into the database does not exists anymore into the LDAP directory.
			// We must not use him.
			logger.warn("authentication process : the current user does not exist anymore into the LDAP directory : " + user.getAccountRepresentation());
			// So week flag him as inconsistent.
			user.setInconsistent(true);
			updateUser(user);
			user = null;
		} else {
			if (user.isInconsistent()) {
				//The user was found and no longer inconsistent so we unflag him.
				user.setInconsistent(false);
				updateUser(user);
			}
		}
		return user;
	}
}