/**
 * 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.url;

import java.util.Collections;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apereo.portal.concurrency.caching.RequestCache;
import org.apereo.portal.portlet.om.IPortletDefinition;
import org.apereo.portal.portlet.om.IPortletEntity;
import org.apereo.portal.portlet.om.IPortletEntityId;
import org.apereo.portal.portlet.om.IPortletWindow;
import org.apereo.portal.portlet.om.IPortletWindowId;
import org.apereo.portal.portlet.registry.IPortletEntityRegistry;
import org.apereo.portal.portlet.registry.IPortletWindowRegistry;
import org.apereo.portal.user.IUserInstance;
import org.apereo.portal.user.IUserInstanceManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Maps tabs and portlets to folder names and back. Handles a single set of tabs and uses tab IDs
 * for folder names.
 *
 */
@Service
public class MobileUrlNodeSyntaxHelper implements IUrlNodeSyntaxHelper {
    public static final char PORTLET_PATH_ELEMENT_SEPERATOR = '.';

    protected final Logger logger = LoggerFactory.getLogger(getClass());

    private IUserInstanceManager userInstanceManager;
    private IPortletWindowRegistry portletWindowRegistry;
    private IPortletEntityRegistry portletEntityRegistry;

    @Autowired
    public void setPortletWindowRegistry(IPortletWindowRegistry portletWindowRegistry) {
        this.portletWindowRegistry = portletWindowRegistry;
    }

    @Autowired
    public void setPortletEntityRegistry(IPortletEntityRegistry portletEntityRegistry) {
        this.portletEntityRegistry = portletEntityRegistry;
    }

    @Autowired
    public void setUserInstanceManager(IUserInstanceManager userInstanceManager) {
        this.userInstanceManager = userInstanceManager;
    }

    @Override
    public String getName() {
        return this.getClass().getSimpleName();
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.url.IUrlNodeSyntaxHelper#getDefaultLayoutNodeId(javax.servlet.http.HttpServletRequest)
     */
    @Override
    public String getDefaultLayoutNodeId(HttpServletRequest httpServletRequest) {
        //Mobile view never targets a node for the default url
        return null;
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.url.IUrlNodeSyntaxHelper#getFolderNamesForLayoutNode(javax.servlet.http.HttpServletRequest, java.lang.String)
     */
    @RequestCache(keyMask = {false, true})
    @Override
    public List<String> getFolderNamesForLayoutNode(
            HttpServletRequest request, String layoutNodeId) {
        //layout node folders are never part of the mobile url
        return Collections.emptyList();
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.url.IUrlNodeSyntaxHelper#getLayoutNodeForFolderNames(javax.servlet.http.HttpServletRequest, java.util.List)
     */
    @Override
    public String getLayoutNodeForFolderNames(
            HttpServletRequest request, List<String> folderNames) {
        return null;
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.url.IUrlNodeSyntaxHelper#getFolderNameForPortlet(javax.servlet.http.HttpServletRequest, org.apereo.portal.portlet.om.IPortletWindowId)
     */
    @RequestCache(keyMask = {false, true})
    @Override
    public String getFolderNameForPortlet(
            HttpServletRequest request, IPortletWindowId portletWindowId) {
        final IPortletWindow portletWindow =
                this.portletWindowRegistry.getPortletWindow(request, portletWindowId);
        final IPortletEntity portletEntity = portletWindow.getPortletEntity();
        final IPortletDefinition portletDefinition = portletEntity.getPortletDefinition();

        final String fname = portletDefinition.getFName();
        final String channelSubscribeId = portletEntity.getLayoutNodeId();

        //Build the targeted portlet string (fname + subscribeId)
        return fname + PORTLET_PATH_ELEMENT_SEPERATOR + channelSubscribeId;
    }

    /* (non-Javadoc)
     * @see org.apereo.portal.url.IUrlNodeSyntaxHelper#getPortletForFolderName(javax.servlet.http.HttpServletRequest, java.lang.String, java.lang.String)
     */
    @Override
    public IPortletWindowId getPortletForFolderName(
            HttpServletRequest request, String targetedLayoutNodeId, String folderName) {
        final IUserInstance userInstance = this.userInstanceManager.getUserInstance(request);

        final String fname;
        final IPortletEntity portletEntity;

        final int seperatorIndex = folderName.indexOf(PORTLET_PATH_ELEMENT_SEPERATOR);
        if (seperatorIndex <= 0 || seperatorIndex + 1 == folderName.length()) {
            fname = folderName;
            portletEntity =
                    this.portletEntityRegistry.getOrCreatePortletEntityByFname(
                            request, userInstance, fname);
        } else {
            fname = folderName.substring(0, seperatorIndex);
            final String subscribeId = folderName.substring(seperatorIndex + 1);

            portletEntity =
                    this.portletEntityRegistry.getOrCreatePortletEntityByFname(
                            request, userInstance, fname, subscribeId);
        }
        if (portletEntity != null) {
            final IPortletEntityId portletEntityId = portletEntity.getPortletEntityId();
            final IPortletWindow portletWindow =
                    this.portletWindowRegistry.getOrCreateDefaultPortletWindow(
                            request, portletEntityId);
            return portletWindow.getPortletWindowId();
        } else {
            this.logger.warn(
                    targetedLayoutNodeId
                            + " node for portlet of folder "
                            + folderName
                            + " can't be targeted by the request.");
            return null;
        }
    }
}