/*
 * Copyright 2016 - 2022 Anton Tananaev (anton@traccar.org)
 * Copyright 2017 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.handler.events;

import io.netty.channel.ChannelHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.helper.model.PositionUtil;
import org.traccar.model.Device;
import org.traccar.model.Event;
import org.traccar.model.Position;
import org.traccar.reports.common.TripsConfig;
import org.traccar.session.cache.CacheManager;
import org.traccar.session.state.MotionProcessor;
import org.traccar.session.state.MotionState;
import org.traccar.storage.Storage;
import org.traccar.storage.StorageException;
import org.traccar.storage.query.Columns;
import org.traccar.storage.query.Condition;
import org.traccar.storage.query.Request;

import javax.inject.Inject;
import java.util.Collections;
import java.util.Map;

@ChannelHandler.Sharable
public class MotionEventHandler extends BaseEventHandler {

    private static final Logger LOGGER = LoggerFactory.getLogger(MotionEventHandler.class);

    private final CacheManager cacheManager;
    private final Storage storage;
    private final TripsConfig tripsConfig;

    @Inject
    public MotionEventHandler(
            CacheManager cacheManager, Storage storage, TripsConfig tripsConfig) {
        this.cacheManager = cacheManager;
        this.storage = storage;
        this.tripsConfig = tripsConfig;
    }

    @Override
    protected Map<Event, Position> analyzePosition(Position position) {

        long deviceId = position.getDeviceId();
        Device device = cacheManager.getObject(Device.class, deviceId);
        if (device == null) {
            return null;
        }
        if (!PositionUtil.isLatest(cacheManager, position)
                || !tripsConfig.getProcessInvalidPositions() && !position.getValid()) {
            return null;
        }

        MotionState state = MotionState.fromDevice(device);
        MotionProcessor.updateState(state, position, position.getBoolean(Position.KEY_MOTION), tripsConfig);
        if (state.isChanged()) {
            state.toDevice(device);
            try {
                storage.updateObject(device, new Request(
                        new Columns.Include("motionState", "motionTime", "motionDistance"),
                        new Condition.Equals("id", "id")));
            } catch (StorageException e) {
                LOGGER.warn("Update device motion error", e);
            }
        }
        return state.getEvent() != null ? Collections.singletonMap(state.getEvent(), position) : null;
    }

}