/***************************************************************************
 * Copyright (C) 2003-2007 eXo Platform SAS.
 *
 * 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.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see<http://www.gnu.org/licenses/>.
 ***************************************************************************/
package org.exoplatform.platform.gadget.services.LoginHistory;

import org.exoplatform.common.http.HTTPStatus;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import org.exoplatform.services.rest.impl.RuntimeDelegateImpl;
import org.exoplatform.services.rest.resource.ResourceContainer;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.CacheControl;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.RuntimeDelegate;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;


/**
 * Created by The eXo Platform SARL Author : Tung Vu Minh tungvm@exoplatform.com
 * Apr 21, 2011 6:19:21 PM
 */

@Path("loginhistory")
public class LoginHistoryRestService implements ResourceContainer {
    private static final Log LOG = ExoLogger.getLogger(LoginHistoryRestService.class);

    private static final CacheControl cacheControl;

    static {
        RuntimeDelegate.setInstance(new RuntimeDelegateImpl());
        cacheControl = new CacheControl();
        cacheControl.setNoCache(true);
        cacheControl.setNoStore(true);
    }

    protected final LoginHistoryService loginHistoryService;

    public LoginHistoryRestService(LoginHistoryService loginHistoryService) {
        this.loginHistoryService = loginHistoryService;
    }

    /**
     * Get user login history
     * <p/>
     * REST service URL: /loginhistory/{userId}/{fromTime}/{toTime}
     *
     * @return: Login history entries from {fromTime} to {toTime} (in JSON data format) of user {userId}
     */
    @GET
    @Path("/loginhistory/{userId}/{fromTime}/{toTime}")
    @Produces(MediaType.APPLICATION_JSON)
    public Response loginhistory(@PathParam("userId") String userId, @PathParam("fromTime") Long fromTime, @PathParam("toTime") Long toTime) throws Exception {
        try {
            List<LoginHistoryBean> loginHis = loginHistoryService.getLoginHistory(userId, fromTime, toTime);

            List<Object> loginHisData = new ArrayList<Object>();
            loginHisData.add(loginHis.size());
            loginHisData.add(loginHis);

            MessageBean data = new MessageBean();
            data.setData(loginHisData);
            return Response.ok(data, MediaType.APPLICATION_JSON).cacheControl(cacheControl).build();
        } catch (Exception e) {
            LOG.debug("Error in get user login history REST service: " + e.getMessage(), e);
            return Response.status(HTTPStatus.INTERNAL_ERROR).cacheControl(cacheControl).build();
        }
    }

    /**
     * Get login count statistic in a week
     * <p/>
     * REST service URL: /loginhistory/weekstats/{userId}/{week}
     *
     * @return: List of login count per days in week {week} (in JSON data format) of user {userId}
     */
    @GET
    @Path("/weekstats/{userId}/{week}")
    @Produces(MediaType.APPLICATION_JSON)
    public Response weekstats(@PathParam("userId") String userId, @PathParam("week") String week) throws Exception {
        try {

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            List<LoginCounterBean> loginCounts = loginHistoryService.getLoginCountPerDaysInWeek(userId, sdf.parse(week).getTime());

            List<Object> loginCountsData = new ArrayList<Object>();

            loginCountsData.add(loginCounts.size());
            loginCountsData.add(loginCounts);

            MessageBean data = new MessageBean();
            data.setData(loginCountsData);
            return Response.ok(data, MediaType.APPLICATION_JSON).cacheControl(cacheControl).build();
        } catch (Exception e) {
            LOG.debug("Error in weekstats REST service: " + e.getMessage(), e);
            return Response.status(HTTPStatus.INTERNAL_ERROR).cacheControl(cacheControl).build();
        }
    }

    /**
     * Get login count statistic in months
     * <p/>
     * REST service URL: /loginhistory/monthstats/{userId}/{fromMonth/{numOfMonth}}
     *
     * @return: List of login count per weeks in {numOfMonths} months start from {fromMonth} (in JSON data format) of user {userId}
     */
    @GET
    @Path("/monthstats/{userId}/{fromMonth}/{numOfMonths}")
    @Produces(MediaType.APPLICATION_JSON)
    public Response monthstats(@PathParam("userId") String userId, @PathParam("fromMonth") String fromMonth, @PathParam("numOfMonths") int numOfMonths) throws Exception {
        try {

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            List<LoginCounterBean> loginCounts = loginHistoryService.getLoginCountPerWeeksInMonths(userId, sdf.parse(fromMonth).getTime(), numOfMonths);

            List<Object> loginCountsData = new ArrayList<Object>();

            loginCountsData.add(loginCounts.size());
            loginCountsData.add(loginCounts);

            MessageBean data = new MessageBean();
            data.setData(loginCountsData);
            return Response.ok(data, MediaType.APPLICATION_JSON).cacheControl(cacheControl).build();
        } catch (Exception e) {
            LOG.debug("Error in monthstats REST service: " + e.getMessage(), e);
            return Response.status(HTTPStatus.INTERNAL_ERROR).cacheControl(cacheControl).build();
        }
    }

    /**
     * Get login count statistic in a year
     * <p/>
     * REST service URL: /loginhistory/yearstats/{userId}/{year}
     *
     * @return: List of login count per months in year {year} (in JSON data format) of user {userId}
     */
    @GET
    @Path("/yearstats/{userId}/{year}")
    @Produces(MediaType.APPLICATION_JSON)
    public Response yearstats(@PathParam("userId") String userId, @PathParam("year") String year) throws Exception {
        try {

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            List<LoginCounterBean> loginCounts = loginHistoryService.getLoginCountPerMonthsInYear(userId, sdf.parse(year).getTime());

            List<Object> loginCountsData = new ArrayList<Object>();

            loginCountsData.add(loginCounts.size());
            loginCountsData.add(loginCounts);

            MessageBean data = new MessageBean();
            data.setData(loginCountsData);
            return Response.ok(data, MediaType.APPLICATION_JSON).cacheControl(cacheControl).build();
        } catch (Exception e) {
            LOG.debug("Error in yearstats REST service: " + e.getMessage(), e);
            return Response.status(HTTPStatus.INTERNAL_ERROR).cacheControl(cacheControl).build();
        }
    }

    /**
     * Get last {numItems} login history entries
     * <p/>
     * REST service URL: /loginhistory/lastlogins/{numItems}/{userIdFilter}
     *
     * @return: The list of last {numItems} login history entries (filtered by {userIdFilter}) in JSON data format
     */
    @GET
    @Path("/lastlogins/{numItems}/{userIdFilter}")
    @Produces(MediaType.APPLICATION_JSON)
    public Response lastlogins(@PathParam("numItems") int numItems, @PathParam("userIdFilter") String userIdFilter) throws Exception {
        try {
            List lastLogins = loginHistoryService.getLastLogins(numItems, userIdFilter);

            MessageBean data = new MessageBean();
            data.setData(lastLogins);
            return Response.ok(data, MediaType.APPLICATION_JSON).cacheControl(cacheControl).build();
        } catch (Exception e) {
            LOG.debug("Error in get last logins REST service: " + e.getMessage(), e);
            return Response.status(HTTPStatus.INTERNAL_ERROR).cacheControl(cacheControl).build();
        }
    }


    public class MessageBean {
        private List<Object> data;

        public void setData(List<Object> list) {
            this.data = list;
        }

        public List<Object> getData() {
            return data;
        }
    }
}
