/*
 * Copyright 2012 - 2014 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.nio.charset.Charset;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.*;
import org.traccar.model.Event;
import org.traccar.model.Position;

public class H02ProtocolDecoder extends BaseProtocolDecoder {

    public H02ProtocolDecoder(H02Protocol protocol) {
        super(protocol);
    }

    private static double readCoordinate(ChannelBuffer buf, boolean lon) {

        int degrees = ChannelBufferTools.readHexInteger(buf, 2);
        if (lon) {
            degrees = degrees * 10 + (buf.getUnsignedByte(buf.readerIndex()) >> 4);
        }

        double result = 0;
        if (lon) {
            result = buf.readUnsignedByte() & 0x0f;
        }

        int length = 6;
        if (lon) {
            length = 5;
        }

        result = result * 10 + ChannelBufferTools.readHexInteger(buf, length) * 0.0001;

        result /= 60;
        result += degrees;

        return result;
    }

    private void processStatus(Position position, long status) {
        if (!BitUtil.check(status, 0) || !BitUtil.check(status, 1)
                || !BitUtil.check(status, 3) || !BitUtil.check(status, 4)) {
            position.set(Event.KEY_ALARM, true);
        }
        position.set(Event.KEY_IGNITION, !BitUtil.check(status, 10));
        position.set(Event.KEY_STATUS, status);
    }

    private Position decodeBinary(ChannelBuffer buf, Channel channel) {

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

        buf.readByte(); // marker

        if (!identify(ChannelBufferTools.readHexString(buf, 10), channel)) {
            return null;
        }
        position.setDeviceId(getDeviceId());

        DateBuilder dateBuilder = new DateBuilder()
                .setHour(ChannelBufferTools.readHexInteger(buf, 2))
                .setMinute(ChannelBufferTools.readHexInteger(buf, 2))
                .setSecond(ChannelBufferTools.readHexInteger(buf, 2))
                .setDay(ChannelBufferTools.readHexInteger(buf, 2))
                .setMonth(ChannelBufferTools.readHexInteger(buf, 2))
                .setYear(ChannelBufferTools.readHexInteger(buf, 2));
        position.setTime(dateBuilder.getDate());

        double latitude = readCoordinate(buf, false);
        position.set(Event.KEY_POWER, buf.readByte());
        double longitude = readCoordinate(buf, true);

        int flags = buf.readUnsignedByte() & 0x0f;
        position.setValid((flags & 0x02) != 0);
        if ((flags & 0x04) == 0) {
            latitude = -latitude;
        }
        if ((flags & 0x08) == 0) {
            longitude = -longitude;
        }

        position.setLatitude(latitude);
        position.setLongitude(longitude);

        position.setSpeed(ChannelBufferTools.readHexInteger(buf, 3));
        position.setCourse((buf.readUnsignedByte() & 0x0f) * 100.0 + ChannelBufferTools.readHexInteger(buf, 2));

        processStatus(position, buf.readUnsignedInt());
        return position;
    }

    private static final Pattern PATTERN = new PatternBuilder()
            .text("*")
            .expression("..,")                   // manufacturer
            .number("(d+),")                     // imei
            .number("Vd,")                       // version?
            .any()
            .number("(dd)(dd)(dd),")             // time
            .expression("([AV])?,")              // validity
            .number("-?(d+)-?(dd.d+),")          // latitude
            .expression("([NS]),")
            .number("-?(d+)-?(dd.d+),")          // longitude
            .expression("([EW]),")
            .number("(d+.?d*),")                 // speed
            .number("(d+.?d*)?,")                // course
            .number("(dd)(dd)(dd),")             // date (ddmmyy)
            .number("(x{8})")                    // status
            .any()
            .compile();

    private Position decodeText(String sentence, Channel channel) {

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

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

        if (!identify(parser.next(), channel)) {
            return null;
        }
        position.setDeviceId(getDeviceId());

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

        if (parser.hasNext()) {
            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());

        processStatus(position, parser.nextLong(16));

        return position;
    }

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

        ChannelBuffer buf = (ChannelBuffer) msg;
        String marker = buf.toString(0, 1, Charset.defaultCharset());

        // handle X mode?

        if (marker.equals("*")) {
            return decodeText(buf.toString(Charset.defaultCharset()), channel);
        } else if (marker.equals("$")) {
            return decodeBinary(buf, channel);
        }

        return null;
    }

}

@@ -724,94 +724,8 @@
 et;%0A
-import java.util.Calendar;%0Aimport java.util.TimeZone;%0Aimport java.util.regex.Matcher;%0A
 impo
@@ -752,16 +752,16 @@
 attern;%0A
+
 import o
@@ -903,17 +903,184 @@
 .helper.
-*
+BitUtil;%0Aimport org.traccar.helper.ChannelBufferTools;%0Aimport org.traccar.helper.DateBuilder;%0Aimport org.traccar.helper.Parser;%0Aimport org.traccar.helper.PatternBuilder
 ;%0Aimport

Remove unused and star imports