/*-
 * ================================================================================
 * ECOMP Portal
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property
 * ================================================================================
 * Licensed 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
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * 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.openecomp.portalapp.portal.service;

import java.util.Collection;
import java.util.Comparator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;

import org.json.JSONArray;
import org.json.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import org.openecomp.portalsdk.core.domain.MenuData;
import org.openecomp.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.openecomp.portalapp.portal.domain.EPUser;
import org.openecomp.portalapp.portal.domain.UserRoles;
//import org.openecomp.portalapp.portal.domain.Menu;
import org.openecomp.portalapp.portal.logging.aop.EPMetricsLog;

@Service("leftMenuService")
@Transactional
@org.springframework.context.annotation.Configuration
@EnableAspectJAutoProxy
@EPMetricsLog

public class EPLeftMenuServiceImpl implements EPLeftMenuService {

	private static final EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(EPLeftMenuServiceImpl.class);

	@Autowired
	private EPAppService appService;

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.openecomp.portalapp.portal.service.EPLeftMenuService#getLeftMenuItems
	 * (java.util.Set)
	 */
	@Override
	public String getLeftMenuItems(EPUser user, Set<MenuData> fullMenuSet, Set<String> roleFunctionSet) {
		final Map<String, JSONObject> defaultNavMap = new LinkedHashMap<String, JSONObject>();

		resetNavMap(defaultNavMap);

		loadDefaultNavMap(defaultNavMap);

		// Handle Account Administrator in a special way; soon this will
		// be revised as Account Administrator may become obsolete
		try {
			if (user != null) {
				UserRoles uRoles = appService.getUserProfileNormalizedForLeftMenu(user);
				if (uRoles.getRoles().contains("Account Administrator"))
					loadAccAdminNavMap(defaultNavMap);
			}
		} catch (Exception e) {
			logger.error(EELFLoggerDelegate.errorLogger,
					"getLeftMenuItems: failed to get roles for user " + user.getOrgUserId(), e);
		}

		loadNavMapByRole(defaultNavMap, fullMenuSet);

		return convertToSideBarModel(defaultNavMap);
	}

	/**
	 * Clears the map
	 * 
	 * @param defaultNavMap
	 */
	private void resetNavMap(Map<String, JSONObject> defaultNavMap) {
		defaultNavMap.clear();
	}

	/**
	 * 
	 * @param defaultNavMap
	 * @param fullMenuSet
	 */
	private void loadNavMapByRole(Map<String, JSONObject> defaultNavMap, Set<MenuData> fullMenuSet) {

		class SortOrderComparator implements Comparator<MenuData> {
			@Override
			public int compare(MenuData e1, MenuData e2) {
				return e1.getSortOrder().compareTo(e2.getSortOrder());
			}
		}

		SortedSet<MenuData> sortMenuSet = new TreeSet<MenuData>(new SortOrderComparator());
		for (MenuData mn : fullMenuSet) {
			sortMenuSet.add(mn);
		}

		for (MenuData mn : sortMenuSet) {
			JSONObject navItemsDetails = new JSONObject();
			navItemsDetails.put("name", mn.getLabel());
			navItemsDetails.put("state", mn.getAction());
			navItemsDetails.put("imageSrc", mn.getImageSrc());
			defaultNavMap.put(mn.getAction(), navItemsDetails);
		}
	}

	/**
	 * 
	 * @param defaultNavMap
	 * @return
	 */
	private String convertToSideBarModel(Map<String, JSONObject> defaultNavMap) {
		JSONObject sidebarModel = new JSONObject();
		JSONArray navItems = new JSONArray();
		Collection<JSONObject> jsonObjs = defaultNavMap.values();

		for (JSONObject navItemsDetail : jsonObjs)
			navItems.put(navItemsDetail);

		sidebarModel.put("label", "ECOMP portal");
		sidebarModel.put("navItems", navItems);
		return sidebarModel.toString();
	}

	/**
	 * Loads default entries for regular user.
	 * 
	 * @param defaultNavMap
	 */
	private void loadDefaultNavMap(Map<String, JSONObject> defaultNavMap) {

		JSONObject navItemsDetails1 = new JSONObject();
		navItemsDetails1.put("name", "Home");
		navItemsDetails1.put("state", "root.applicationsHome");
		navItemsDetails1.put("imageSrc", "icon-building-home");
		defaultNavMap.put("root.applicationsHome", navItemsDetails1);

		JSONObject navItemsDetails2 = new JSONObject();
		navItemsDetails2.put("name", "Application Catalog");
		navItemsDetails2.put("state", "root.appCatalog");
		navItemsDetails2.put("imageSrc", "icon-apps-marketplace");
		defaultNavMap.put("root.appCatalog", navItemsDetails2);

		JSONObject navItemsDetails3 = new JSONObject();
		navItemsDetails3.put("name", "Widget Catalog");
		navItemsDetails3.put("state", "root.widgetCatalog");
		navItemsDetails3.put("imageSrc", "icon-apps-marketplace");
		defaultNavMap.put("root.widgetCatalog", navItemsDetails3);

	}

	/**
	 * Loads default entries for application administrator.
	 * 
	 * @param defaultNavMap
	 */
	private void loadAccAdminNavMap(Map<String, JSONObject> defaultNavMap) {

		JSONObject navItemsDetails1 = new JSONObject();
		navItemsDetails1.put("name", "Users");
		navItemsDetails1.put("state", "root.users");
		navItemsDetails1.put("imageSrc", "icon-user");
		defaultNavMap.put("root.users", navItemsDetails1);

		// No more widget onboarding like this:
		//
		// JSONObject navItemsDetails2 = new JSONObject();
		// navItemsDetails2.put("name", "Widget Onboarding");
		// navItemsDetails2.put("state", "root.widgetOnboarding");
		// navItemsDetails2.put("imageSrc", "icon-add-widget");
		// defaultNavMap.put("root.widgetOnboarding", navItemsDetails2);

	}

}