/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.protocols.ss7.tools.traceparser;

import java.io.FileInputStream;
import java.io.IOException;

/**
 *
 * @author sergey vetyutnev
 *
 */
public class TraceReaderDriverActerna extends TraceReaderDriverBase implements TraceReaderDriver {

    public TraceReaderDriverActerna(ProcessControl processControl, String fileName) {
        super(processControl, fileName);
    }

    public void startTraceFile() throws TraceReaderException {

        if (this.listeners.size() == 0)
            throw new TraceReaderException("TraceReaderListener list is empty");

        this.isStarted = true;

        FileInputStream fis = null;

        try {
            if (this.processControl.checkNeedInterrupt())
                return;

            fis = new FileInputStream(fileName);

            int ind = 0;
            int b = 0;
            int recCnt = 0;
            int step = 4;
            int stepPos = 0;
            int blockLen = 0;
            int sufLen = 0;
            int[] buf = new int[5];
            // byte[] bufTag;
            while (fis.available() > 0) {
                if (this.processControl.checkNeedInterrupt())
                    return;

                b = fis.read();

                switch (step) {
                case 1:
                    buf[stepPos] = b;
                    if (stepPos == 16) {
                        blockLen = b;
                    }
                    if (stepPos == 15 && b != 0 || stepPos == 17 && b != 0 && b != 1) {
                        this.loger.error("Error #1, recCnt=" + recCnt);
                    }

                    if (stepPos == 17) {
                        blockLen += b * 256;

                        step = 2;
                        stepPos = 0;
                        buf = new int[blockLen];
                    } else
                        stepPos++;
                    break;

                case 2:
                    buf[stepPos] = b;

                    if (stepPos == blockLen - 1) {

                        byte[] data = new byte[blockLen];
                        for (int i = 0; i < blockLen; i++) {
                            data[i] = (byte) buf[i];
                        }

                        // ...........................
                        if (data == null || data.length < 8) {
                            throw new TraceReaderException("Too little data in the raw data");
                        }

                        TraceParserUtil.parceLegacyMtp3(data, this.listeners);
                        // ...........................

//                        for (TraceReaderListener ls : this.listeners) {
//                            ls.ss7Message(bufMsg);
//                        }

                        step = 3;
                        stepPos = 0;
                        buf = new int[2];
                    } else
                        stepPos++;
                    break;

                case 3:
                    buf[stepPos] = b;

                    if (stepPos == 1) {

                        step = 4;
                        stepPos = 0;
                        buf = new int[5];
                    } else
                        stepPos++;
                    break;

                case 4:
                    buf[stepPos] = b;

                    if (b == 2) {
                        int[] buf2 = new int[stepPos + 1];
                        for (int i1 = 0; i1 <= stepPos; i1++)
                            buf2[i1] = buf[i1];

                        recCnt++;
                        step = 1;
                        stepPos = 0;
                        buf = new int[18];
                    } else
                        stepPos++;
                    break;
                }

                ind++;
            }

        } catch (Throwable e) {
            this.loger.error("General exception: " + e.getMessage());
            e.printStackTrace();
            throw new TraceReaderException("General exception: " + e.getMessage(), e);
        } finally {
            try {
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}