/*
 * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
 * Copyright 2016 - 2018 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.events;

import java.util.HashMap;
import java.util.Map;

import org.traccar.BaseEventHandler;
import org.traccar.Context;
import org.traccar.model.Event;
import org.traccar.model.Maintenance;
import org.traccar.model.Position;

public class MaintenanceEventHandler extends BaseEventHandler {

    @Override
    protected Map<Event, Position> analyzePosition(Position position) {
        if (Context.getIdentityManager().getById(position.getDeviceId()) == null
                || !Context.getIdentityManager().isLatestPosition(position)) {
            return null;
        }

        double oldTotalDistance = 0.0;
        double newTotalDistance = 0.0;

        Position lastPosition = Context.getIdentityManager().getLastPosition(position.getDeviceId());
        if (lastPosition != null) {
            oldTotalDistance = lastPosition.getDouble(Position.KEY_TOTAL_DISTANCE);
        }
        newTotalDistance = position.getDouble(Position.KEY_TOTAL_DISTANCE);

        Map<Event, Position> events = new HashMap<>();
        for (long maintenanceId : Context.getMaintenancesManager().getAllDeviceItems(position.getDeviceId())) {
            Maintenance maintenance = Context.getMaintenancesManager().getById(maintenanceId);
            if (maintenance.getLapse() != 0
                    && (long) ((oldTotalDistance - maintenance.getStart()) / maintenance.getLapse())
                    < (long) ((newTotalDistance - maintenance.getStart()) / maintenance.getLapse())) {
                Event event = new Event(Event.TYPE_MAINTENANCE, position.getDeviceId(), position.getId());
                event.setMaintenanceId(maintenanceId);
                event.set(Position.KEY_TOTAL_DISTANCE, newTotalDistance);
                events.put(event, position);
            }
        }

        return events;
    }

}