/*
 * Copyright 2021 Anton Tananaev (anton@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.protocol;

import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.BitUtil;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;

import java.net.SocketAddress;
import java.util.regex.Pattern;

public class StartekProtocolDecoder extends BaseProtocolDecoder {

    public StartekProtocolDecoder(Protocol protocol) {
        super(protocol);
    }

    private static final Pattern PATTERN = new PatternBuilder()
            .text("&&")
            .expression(".")                     // index
            .number("d+,")                       // length
            .number("(d+),")                     // imei
            .expression("(.+)")                  // content
            .number("xx")                        // checksum
            .compile();

    private static final Pattern PATTERN_POSITION = new PatternBuilder()
            .number("xxx,")                      // command
            .number("(d+),")                     // event
            .expression("([^,]+)?,")             // event data
            .number("(dd)(dd)(dd)")              // date (yyymmdd)
            .number("(dd)(dd)(dd),")             // time (hhmmss)
            .expression("([AV]),")               // valid
            .number("(-?d+.d+),")                // longitude
            .number("(-?d+.d+),")                // latitude
            .number("(d+),")                     // satellites
            .number("(d+.d+),")                  // hdop
            .number("(d+),")                     // speed
            .number("(d+),")                     // course
            .number("(-?d+),")                   // altitude
            .number("(d+),")                     // odometer
            .number("(d+)|")                     // mcc
            .number("(d+)|")                     // mnc
            .number("(x+)|")                     // lac
            .number("(x+),")                     // cid
            .number("(d+),")                     // rssi
            .number("(x+),")                     // status
            .number("(x+),")                     // inputs
            .number("(x+),")                     // outputs
            .number("(x+)|")                     // power
            .number("(x+)")                      // battery
            .groupBegin()
            .text("|")
            .expression("([^,]+)").optional()    // adc
            .groupBegin()
            .text(",")
            .number("d,")                        // extended
            .expression("([^,]+)?,")             // fuel
            .expression("([^,]+)?,?")            // temperature
            .groupEnd("?")
            .groupEnd("?")
            .any()
            .compile();

    private String decodeAlarm(int value) {
        switch (value) {
            case 5:
            case 6:
                return Position.ALARM_DOOR;
            case 39:
                return Position.ALARM_ACCELERATION;
            case 40:
                return Position.ALARM_BRAKING;
            case 41:
                return Position.ALARM_CORNERING;
            default:
                return null;
        }
    }

    @Override
    protected Object decode(
            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

        Parser parser = new Parser(PATTERN, (String) msg);
        if (!parser.matches()) {
            return null;
        }

        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
        if (deviceSession == null) {
            return null;
        }

        String content = parser.next();
        if (content.length() < 100) {

            Position position = new Position(getProtocolName());
            position.setDeviceId(deviceSession.getDeviceId());

            getLastLocation(position, null);

            position.set(Position.KEY_RESULT, content);

            return position;

        } else {

            return decodePosition(deviceSession, content);

        }
    }

    protected Object decodePosition(DeviceSession deviceSession, String content) throws Exception {

        Parser parser = new Parser(PATTERN_POSITION, content);
        if (!parser.matches()) {
            return null;
        }

        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        int event = parser.nextInt();
        String eventData = parser.next();
        position.set(Position.KEY_EVENT, event);
        if (event == 53) {
            position.set(Position.KEY_DRIVER_UNIQUE_ID, eventData);
        } else {
            position.set(Position.KEY_ALARM, decodeAlarm(event));
        }

        position.setTime(parser.nextDateTime());
        position.setValid(parser.next().equals("A"));
        position.setLatitude(parser.nextDouble());
        position.setLongitude(parser.nextDouble());

        position.set(Position.KEY_SATELLITES, parser.nextInt());
        position.set(Position.KEY_HDOP, parser.nextDouble());

        position.setSpeed(UnitsConverter.knotsFromKph(parser.nextInt()));
        position.setCourse(parser.nextInt());
        position.setAltitude(parser.nextInt());

        position.set(Position.KEY_ODOMETER, parser.nextInt());

        position.setNetwork(new Network(CellTower.from(
                parser.nextInt(), parser.nextInt(), parser.nextHexInt(), parser.nextHexInt(), parser.nextInt())));

        position.set(Position.KEY_STATUS, parser.nextHexInt());

        int input = parser.nextHexInt();
        int output = parser.nextHexInt();
        position.set(Position.KEY_IGNITION, BitUtil.check(input, 1));
        position.set(Position.KEY_INPUT, input);
        position.set(Position.KEY_OUTPUT, output);

        position.set(Position.KEY_POWER, parser.nextHexInt() * 0.01);
        position.set(Position.KEY_BATTERY, parser.nextHexInt() * 0.01);

        if (parser.hasNext()) {
            String[] adc = parser.next().split("\\|");
            for (int i = 0; i < adc.length; i++) {
                position.set(Position.PREFIX_ADC + (i + 1), Integer.parseInt(adc[i], 16) * 0.01);
            }
        }

        if (parser.hasNext()) {
            String[] fuels = parser.next().split("\\|");
            for (String fuel : fuels) {
                int index = Integer.parseInt(fuel.substring(0, 2));
                int value = Integer.parseInt(fuel.substring(2), 16);
                position.set("fuel" + index, value * 0.1);
            }
        }

        if (parser.hasNext()) {
            String[] temperatures = parser.next().split("\\|");
            for (String temperature : temperatures) {
                int index = Integer.parseInt(temperature.substring(0, 2));
                int value = Integer.parseInt(temperature.substring(2), 16);
                double convertedValue = BitUtil.to(value, 15);
                if (BitUtil.check(value, 15)) {
                    convertedValue = -convertedValue;
                }
                position.set(Position.PREFIX_TEMP + index, convertedValue * 0.1);
            }
        }

        return position;
    }

}