/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use
 * this file except in compliance with the License. You may obtain a copy of the License at the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>Unless required by applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apereo.portal.security.xslt;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apereo.portal.EntityIdentifier;
import org.apereo.portal.groups.IEntity;
import org.apereo.portal.groups.IEntityGroup;
import org.apereo.portal.groups.IGroupMember;
import org.apereo.portal.portlet.om.IPortletDefinition;
import org.apereo.portal.portlet.registry.IPortletDefinitionRegistry;
import org.apereo.portal.security.IPerson;
import org.apereo.portal.services.GroupService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 */
@Service
public class XalanGroupMembershipHelperBean implements IXalanGroupMembershipHelper {
    protected final Log logger = LogFactory.getLog(this.getClass());

    private IPortletDefinitionRegistry portletDefinitionRegistry;

    /** @param portletDefinitionRegistry the portletDefinitionRegistry to set */
    @Autowired
    public void setPortletDefinitionRegistry(IPortletDefinitionRegistry portletDefinitionRegistry) {
        this.portletDefinitionRegistry = portletDefinitionRegistry;
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.security.xslt.IXalanGroupMembershipHelper#isChannelDeepMemberOf(java.lang.String, java.lang.String)
     */
    @Override
    public boolean isChannelDeepMemberOf(String fname, String groupKey) {
        final IEntityGroup distinguishedGroup = GroupService.findGroup(groupKey);
        if (distinguishedGroup == null) {
            if (this.logger.isDebugEnabled()) {
                this.logger.debug("No group found for key '" + groupKey + "'");
            }

            return false;
        }

        final IPortletDefinition portletDefinition;
        try {
            portletDefinition = this.portletDefinitionRegistry.getPortletDefinitionByFname(fname);
        } catch (Exception e) {
            this.logger.warn(
                    "Caught exception while retrieving portlet definition for fname '"
                            + fname
                            + "'",
                    e);
            return false;
        }

        if (portletDefinition == null) {
            if (this.logger.isDebugEnabled()) {
                this.logger.debug("No portlet found for key '" + fname + "'");
            }

            return false;
        }

        final String portletId = portletDefinition.getPortletDefinitionId().getStringId();
        final IEntity entity = GroupService.getEntity(portletId, IPortletDefinition.class);
        if (entity == null) {
            if (this.logger.isDebugEnabled()) {
                this.logger.debug("No portlet found for id '" + portletId + "'");
            }

            return false;
        }

        return distinguishedGroup.deepContains(entity);
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.security.xslt.IXalanGroupMembershipHelper#isUserDeepMemberOf(java.lang.String, java.lang.String)
     */
    @Override
    public boolean isUserDeepMemberOf(String userName, String groupKey) {
        final IEntityGroup distinguishedGroup = GroupService.findGroup(groupKey);
        if (distinguishedGroup == null) {
            if (this.logger.isDebugEnabled()) {
                this.logger.debug("No group found for key '" + groupKey + "'");
            }

            return false;
        }

        final IEntity entity = GroupService.getEntity(userName, IPerson.class);
        if (entity == null) {
            if (this.logger.isDebugEnabled()) {
                this.logger.debug("No user found for key '" + userName + "'");
            }

            return false;
        }

        return distinguishedGroup.deepContains(entity);
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.security.xslt.IXalanGroupMembershipHelper#isUserDeepMemberOfGroupName(java.lang.String, java.lang.String)
     */
    @Override
    public boolean isUserDeepMemberOfGroupName(String userName, String groupName) {
        final EntityIdentifier[] results =
                GroupService.searchForGroups(groupName, GroupService.IS, IPerson.class);
        if (results == null || results.length == 0) {
            return false;
        }

        if (results.length > 1) {
            this.logger.warn(
                    results.length
                            + " groups were found for '"
                            + groupName
                            + "'. The first result will be used.");
        }

        final IGroupMember group = GroupService.getGroupMember(results[0]);

        final IEntity entity = GroupService.getEntity(userName, IPerson.class);
        if (entity == null) {
            if (this.logger.isDebugEnabled()) {
                this.logger.debug("No user found for key '" + userName + "'");
            }

            return false;
        }

        return group.asGroup().deepContains(entity);
    }
}