/*
 * Copyright 2012 - 2015 Anton Tananaev (anton.tananaev@gmail.com)
 *
 * 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 java.net.SocketAddress;
import java.util.Date;
import java.util.regex.Pattern;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Event;
import org.traccar.model.Position;

public class T55ProtocolDecoder extends BaseProtocolDecoder {

    public T55ProtocolDecoder(T55Protocol protocol) {
        super(protocol);
    }

    private static final Pattern PATTERN_GPRMC = new PatternBuilder()
            .txt("$GPRMC,")
            .num("(dd)(dd)(dd).?d*,")            // time
            .xpr("([AV]),")                      // validity
            .num("(dd)(dd.d+),")                 // latitude
            .xpr("([NS]),")
            .num("(d{2,3})(dd.d+),")             // longitude
            .xpr("([EW]),")
            .num("(d+.?d*)?,")                   // speed
            .num("(d+.?d*)?,")                   // course
            .num("(dd)(dd)(dd)")                 // date
            .any()
            .compile();

    private static final Pattern PATTERN_GPGGA = new PatternBuilder()
            .txt("$GPGGA,")
            .num("(dd)(dd)(dd).?d*,")            // time
            .num("(d+)(dd.d+),")                 // latitude
            .xpr("([NS]),")
            .num("(d+)(dd.d+),")                 // longitude
            .xpr("([EW]),")
            .any()
            .compile();

    private static final Pattern PATTERN_GPRMA = new PatternBuilder()
            .txt("$GPRMA,")
            .xpr("([AV]),")                      // validity
            .num("(dd)(dd.d+),")                 // latitude
            .xpr("([NS]),")
            .num("(ddd)(dd.d+),")                // longitude
            .xpr("([EW]),,,")
            .num("(d+.?d*)?,")                   // speed
            .num("(d+.?d*)?,")                   // course
            .any()
            .compile();

    private static final Pattern PATTERN_TRCCR = new PatternBuilder()
            .txt("$TRCCR,")
            .num("(dddd)(dd)(dd)")               // date
            .num("(dd)(dd)(dd).?d*,")            // time
            .xpr("([AV]),")                      // validity
            .num("(-?d+.d+),")                   // latitude
            .num("(-?d+.d+),")                   // longitude
            .num("(d+.d+),")                     // speed
            .num("(d+.d+),")                     // course
            .num("(-?d+.d+),")                   // altitude
            .num("(d+.?d*),")                    // battery
            .any()
            .compile();

    private Position decodeGprmc(String sentence, Channel channel) {

        if (channel != null) {
            channel.write("OK1\r\n");
        }

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

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

        DateBuilder dateBuilder = new DateBuilder()
                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());

        position.setValid(parser.next().equals("A"));
        position.setLatitude(parser.nextCoordinate());
        position.setLongitude(parser.nextCoordinate());
        position.setSpeed(parser.nextDouble());
        position.setCourse(parser.nextDouble());

        dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
        position.setTime(dateBuilder.getDate());

        return position;
    }

    private Position decodeGpgga(String sentence) {

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

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

        DateBuilder dateBuilder = new DateBuilder()
                .setCurrentDate()
                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
        position.setTime(dateBuilder.getDate());

        position.setValid(true);
        position.setLatitude(parser.nextCoordinate());
        position.setLongitude(parser.nextCoordinate());

        return position;
    }

    private Position decodeGprma(String sentence) {

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

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

        position.setTime(new Date());
        position.setValid(parser.next().equals("A"));
        position.setLatitude(parser.nextCoordinate());
        position.setLongitude(parser.nextCoordinate());
        position.setSpeed(parser.nextDouble());
        position.setCourse(parser.nextDouble());

        return position;
    }

    private Position decodeTrccr(String sentence) {

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

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

        DateBuilder dateBuilder = new DateBuilder()
                .setDate(parser.nextInt(), parser.nextInt(), parser.nextInt())
                .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
        position.setTime(dateBuilder.getDate());

        position.setValid(parser.next().equals("A"));
        position.setLatitude(parser.nextDouble());
        position.setLongitude(parser.nextDouble());
        position.setSpeed(parser.nextDouble());
        position.setCourse(parser.nextDouble());
        position.setAltitude(parser.nextDouble());

        position.set(Event.KEY_BATTERY, parser.next());

        return position;
    }

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

        String sentence = (String) msg;

        if (!sentence.startsWith("$") && sentence.contains("$")) {
            int index = sentence.indexOf("$");
            String id = sentence.substring(0, index);
            if (id.endsWith(",")) {
                id = id.substring(0, id.length() - 1);
            }
            identify(id, channel);
            sentence = sentence.substring(index);
        }

        if (sentence.startsWith("$PGID")) {
            identify(sentence.substring(6, sentence.length() - 3), channel);
        } else if (sentence.startsWith("$PCPTI")) {
            identify(sentence.substring(7, sentence.indexOf(",", 7)), channel);
        } else if (sentence.startsWith("IMEI")) {
            identify(sentence.substring(5, sentence.length()), channel);
        } else if (sentence.startsWith("$GPFID")) {
            identify(sentence.substring(6, sentence.length()), channel);
        } else if (Character.isDigit(sentence.charAt(0)) && sentence.length() == 15) {
            identify(sentence, channel);
        } else if (sentence.startsWith("$GPRMC") && hasDeviceId()) {
            return decodeGprmc(sentence, channel);
        } else if (sentence.startsWith("$GPGGA") && hasDeviceId()) {
            return decodeGpgga(sentence);
        } else if (sentence.startsWith("$GPRMA") && hasDeviceId()) {
            return decodeGprma(sentence);
        } else if (sentence.startsWith("$TRCCR") && hasDeviceId()) {
            return decodeTrccr(sentence);
        }

        return null;
    }

}