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/*
 * Copyright 2016 Anton Tananaev (anton@traccar.org)
 * Copyright 2016 Andrey Kunitsyn (andrey@traccar.org)
 *
 * 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.traccar.reports;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;

import org.apache.poi.ss.util.WorkbookUtil;
import org.traccar.Context;
import org.traccar.Main;
import org.traccar.database.DeviceManager;
import org.traccar.database.IdentityManager;
import org.traccar.model.Device;
import org.traccar.model.Group;
import org.traccar.reports.model.DeviceReport;
import org.traccar.reports.model.TripReport;

public final class Trips {

    private Trips() {
    }

    private static Collection<TripReport> detectTrips(long deviceId, Date from, Date to) throws SQLException {
        boolean ignoreOdometer = Context.getDeviceManager()
                .lookupAttributeBoolean(deviceId, "report.ignoreOdometer", false, false, true);

        IdentityManager identityManager = Main.getInjector().getInstance(IdentityManager.class);
        DeviceManager deviceManager = Main.getInjector().getInstance(DeviceManager.class);

        return ReportUtils.detectTripsAndStops(
                identityManager, deviceManager, Context.getDataManager().getPositions(deviceId, from, to),
                Context.getTripsConfig(), ignoreOdometer, TripReport.class);
    }

    public static Collection<TripReport> getObjects(long userId, Collection<Long> deviceIds, Collection<Long> groupIds,
            Date from, Date to) throws SQLException {
        ReportUtils.checkPeriodLimit(from, to);
        ArrayList<TripReport> result = new ArrayList<>();
        for (long deviceId: ReportUtils.getDeviceList(deviceIds, groupIds)) {
            Context.getPermissionsManager().checkDevice(userId, deviceId);
            result.addAll(detectTrips(deviceId, from, to));
        }
        return result;
    }

    public static void getExcel(OutputStream outputStream,
            long userId, Collection<Long> deviceIds, Collection<Long> groupIds,
            Date from, Date to) throws SQLException, IOException {
        ReportUtils.checkPeriodLimit(from, to);
        ArrayList<DeviceReport> devicesTrips = new ArrayList<>();
        ArrayList<String> sheetNames = new ArrayList<>();
        for (long deviceId: ReportUtils.getDeviceList(deviceIds, groupIds)) {
            Context.getPermissionsManager().checkDevice(userId, deviceId);
            Collection<TripReport> trips = detectTrips(deviceId, from, to);
            DeviceReport deviceTrips = new DeviceReport();
            Device device = Context.getIdentityManager().getById(deviceId);
            deviceTrips.setDeviceName(device.getName());
            sheetNames.add(WorkbookUtil.createSafeSheetName(deviceTrips.getDeviceName()));
            if (device.getGroupId() != 0) {
                Group group = Context.getGroupsManager().getById(device.getGroupId());
                if (group != null) {
                    deviceTrips.setGroupName(group.getName());
                }
            }
            deviceTrips.setObjects(trips);
            devicesTrips.add(deviceTrips);
        }
        String templatePath = Context.getConfig().getString("report.templatesPath",
                "templates/export/");
        try (InputStream inputStream = new FileInputStream(templatePath + "/trips.xlsx")) {
            org.jxls.common.Context jxlsContext = ReportUtils.initializeContext(userId);
            jxlsContext.putVar("devices", devicesTrips);
            jxlsContext.putVar("sheetNames", sheetNames);
            jxlsContext.putVar("from", from);
            jxlsContext.putVar("to", to);
            ReportUtils.processTemplateWithSheets(inputStream, outputStream, jxlsContext);
        }
    }

}