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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.ofbiz.pos.jpos.service;

import java.util.HashMap;
import java.util.Map;
import java.util.Enumeration;

import jpos.JposException;
import jpos.ScannerConst;
import jpos.services.EventCallbacks;
import jpos.events.DataEvent;

import org.ofbiz.base.util.UtilGenerics;
import org.ofbiz.pos.adaptor.KeyboardAdaptor;
import org.ofbiz.pos.adaptor.KeyboardReceiver;

/**
 * Generic Keyboard Wedge Barcode Scanner
 *
 * Configure your scanner:
 * 1) Send STX Preamble
 * 2) Send barcode id as prefix
 * 3) Termination char CR
 * 4) Do NOT send ETX Postamble
 */
public class ScannerKybService extends BaseService implements jpos.services.ScannerService17, KeyboardReceiver {

    public static final String module = ScannerKybService.class.getName();
    private static final int TYPELOC_PREFIX = 50;
    private static final int TYPELOC_SUFFIX = 60;
    private static final int TYPELOC_NONE = 99;

    protected Map<String, Integer> barcodeIdMap = new HashMap<String, Integer>();

    protected byte[] scannedDataLabel = new byte[0];
    protected byte[] scannedData = new byte[0];
    protected String codeId = "";

    protected boolean decodeData = true;
    protected boolean eventEnabled = true;
    protected boolean autoDisable = false;
    protected int powerState = 1;
    protected int codeLocation = TYPELOC_PREFIX;

    public ScannerKybService() {
        KeyboardAdaptor.getInstance(this, KeyboardAdaptor.SCANNER_DATA);
    }

    @Override
    public void open(String deviceName, EventCallbacks ecb) throws JposException {
        super.open(deviceName, ecb);
        this.readCodeMap();
        if (entry.hasPropertyWithName("BarcodeTypePosition")) {
            if (entry.getProp("BarcodeTypePosition").getValueAsString().equalsIgnoreCase("suffix")) {
                this.codeLocation = TYPELOC_SUFFIX;
            } else if (entry.getProp("BarcodeTypePosition").getValueAsString().equalsIgnoreCase("prefix")) {
                this.codeLocation = TYPELOC_PREFIX;
            } else {
                this.codeLocation = TYPELOC_NONE;
            }
        }
    }

    // ScannerService12
    public boolean getAutoDisable() throws JposException {
        return this.autoDisable;
    }

    public void setAutoDisable(boolean b) throws JposException {
        this.autoDisable = b;
    }

    public boolean getDecodeData() throws JposException {
        return this.decodeData;
    }

    public void setDecodeData(boolean b) throws JposException {
        this.decodeData = b;
    }

    public byte[] getScanData() throws JposException {
        return this.scannedData;
    }

    public byte[] getScanDataLabel() throws JposException {
        if (this.decodeData) {
            return this.scannedDataLabel;
        } else {
            return new byte[0];
        }
    }

    public int getScanDataType() throws JposException {
        if (codeId != null && barcodeIdMap.containsKey(codeId)) {
            return (barcodeIdMap.get(codeId)).intValue();
        }
        return ScannerConst.SCAN_SDT_UNKNOWN;
    }

    public void clearInput() throws JposException {
        this.scannedDataLabel = new byte[0];
        this.scannedData = new byte[0];
        this.codeId = "";
    }

    // ScannerService13
    public int getCapPowerReporting() throws JposException {
        return 0;
    }

    public int getPowerNotify() throws JposException {
        return 0;
    }

    public void setPowerNotify(int i) throws JposException {
    }

    public int getPowerState() throws JposException {
        return 0;
    }

    // KeyboardReceiver
    public synchronized void receiveData(int[] codes, char[] chars) {
        String dataStr = new String(chars);
        this.parseScannedString(dataStr);

        // fire off the event notification
        DataEvent event = new DataEvent(this, 0);
        this.fireEvent(event);
    }

    private void parseScannedString(String str) {
        if (str == null) {
            return;
        }

        // parse the scanned data
        if (str != null) {
            str = str.trim();
            this.scannedData = str.getBytes();
            if (this.decodeData) {
                if (this.codeLocation == TYPELOC_PREFIX) {
                    this.codeId = str.substring(0, 1).toUpperCase();
                    this.scannedDataLabel = str.substring(1).getBytes();
                } else if (this.codeLocation == TYPELOC_SUFFIX) {
                    this.codeId = str.substring(str.length() - 1);
                    this.scannedDataLabel = str.substring(0, str.length() - 1).getBytes();
                } else {
                    this.codeId = "";
                    this.scannedDataLabel = str.getBytes();
                }
            }
        }
    }

    private void readCodeMap() {
        if (barcodeIdMap == null) {
            barcodeIdMap = new HashMap<String, Integer>();
        }
        if (barcodeIdMap.size() > 0) {
            return;
        }

        Enumeration<String> names = UtilGenerics.cast(entry.getPropertyNames());
        if (names != null) {
            while (names.hasMoreElements()) {
                String codeType = names.nextElement();
                if (codeType.startsWith("CodeType:")) {
                    String codeValue = entry.getProp(codeType).getValueAsString();
                    if ("CodeType:CODE11".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_OTHER);
                    } else if ("CodeType:CODE39".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_Code39);
                    } else if ("CodeType:CODE93".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_Code93);
                    } else if ("CodeType:CODE128".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_Code128);
                    } else if ("CodeType:CODABAR".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_Codabar);
                    } else if ("CodeType:I2OF5".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_OTHER);
                    } else if ("CodeType:ID2OF5".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_OTHER);
                    } else if ("CodeType:MSI".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_OTHER);
                    } else if ("CodeType:UPCA".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_UPCA);
                    } else if ("CodeType:UPCE".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_UPCE);
                    } else if ("CodeType:EAN13".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_EAN13);
                    } else if ("CodeType:EAN8".equals(codeType)) {
                        barcodeIdMap.put(codeValue.toUpperCase(), ScannerConst.SCAN_SDT_EAN8);
                    }
                }
            }
        }
    }
}