/*
    * Licensed to The Apereo Foundation under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional
    * information regarding copyright ownership.
    *
    *
    * The Apereo Foundation licenses this file to you under the Educational
    * Community 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://opensource.org/licenses/ecl2.txt
   *
   * 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.opencastproject.mediapackage.track;
  
  import org.opencastproject.mediapackage.AudioStream;
  import org.opencastproject.mediapackage.MediaPackageSerializer;
  
  import org.apache.commons.lang3.StringUtils;
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  import org.w3c.dom.Node;
  
  import java.util.UUID;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlElement;
  import javax.xml.bind.annotation.XmlType;
  import javax.xml.xpath.XPath;
  import javax.xml.xpath.XPathConstants;
  import javax.xml.xpath.XPathException;
  
  /**
   * Implementation of {@link org.opencastproject.mediapackage.AudioStream}.
   */
  @XmlAccessorType(XmlAccessType.NONE)
  @XmlType(name = "audio", namespace = "http://mediapackage.opencastproject.org")
  public class AudioStreamImpl extends AbstractStreamImpl implements AudioStream {
  
    @XmlElement(name = "bitdepth")
    protected Integer bitdepth;
  
    @XmlElement(name = "channels")
    protected Integer channels;
  
    @XmlElement(name = "samplingrate")
    protected Integer samplingrate;
  
    @XmlElement(name = "bitrate")
    protected Float bitrate;
  
    @XmlElement(name = "peakleveldb")
    protected Float pkLevDb;
  
    @XmlElement(name = "rmsleveldb")
    protected Float rmsLevDb;
  
    @XmlElement(name = "rmspeakdb")
    protected Float rmsPkDb;
  
    public AudioStreamImpl() {
      this(UUID.randomUUID().toString());
    }
  
    public AudioStreamImpl(String identifier) {
      super(identifier);
    }
  
    /**
     * @see org.opencastproject.mediapackage.ManifestContributor#toManifest(org.w3c.dom.Document,
     *      org.opencastproject.mediapackage.MediaPackageSerializer)
     */
    @Override
    public Node toManifest(Document document, MediaPackageSerializer serializer) {
      Element node = document.createElement("audio");
      addCommonManifestElements(node, document, serializer);
  
      // Channels
      if (channels != null) {
        Element channelsNode = document.createElement("channels");
        channelsNode.appendChild(document.createTextNode(channels.toString()));
        node.appendChild(channelsNode);
      }
  
      // Bit depth
      if (bitdepth != null) {
        Element bitdepthNode = document.createElement("bitdepth");
        bitdepthNode.appendChild(document.createTextNode(bitdepth.toString()));
        node.appendChild(bitdepthNode);
     }
 
     // Bit rate
     if (bitrate != null) {
       Element bitratenode = document.createElement("bitrate");
       bitratenode.appendChild(document.createTextNode(bitrate.toString()));
       node.appendChild(bitratenode);
     }
 
     // Sampling rate
     if (samplingrate != null) {
       Element samplingrateNode = document.createElement("samplingrate");
       samplingrateNode.appendChild(document.createTextNode(samplingrate.toString()));
       node.appendChild(samplingrateNode);
     }
 
     // Pk lev dB
     if (pkLevDb != null) {
       Element peakleveldbNode = document.createElement("peakleveldb");
       peakleveldbNode.appendChild(document.createTextNode(pkLevDb.toString()));
       node.appendChild(peakleveldbNode);
     }
     // RMS lev dB
     if (rmsLevDb != null) {
       Element rmsleveldbNode = document.createElement("rmsleveldb");
       rmsleveldbNode.appendChild(document.createTextNode(rmsLevDb.toString()));
       node.appendChild(rmsleveldbNode);
     }
     // RMS Pk dB
     if (rmsPkDb != null) {
       Element rmspeakdbNode = document.createElement("rmspeakdb");
       rmspeakdbNode.appendChild(document.createTextNode(rmsPkDb.toString()));
       node.appendChild(rmspeakdbNode);
     }
     return node;
   }
 
   /**
    * Create an audio stream from the XML manifest.
    *
    * @param streamIdHint
    *          stream ID that has to be used if the manifest does not provide one. This is the case when reading an old
    *          manifest.
    */
   public static AudioStreamImpl fromManifest(String streamIdHint, Node node, XPath xpath) throws IllegalStateException,
           XPathException {
     // Create stream
     String sid = (String) xpath.evaluate("@id", node, XPathConstants.STRING);
     if (StringUtils.isEmpty(sid)) {
       sid = streamIdHint;
     }
     AudioStreamImpl as = new AudioStreamImpl(sid);
     partialFromManifest(as, node, xpath);
 
     // bit depth
     try {
       String bd = (String) xpath.evaluate("bitdepth/text()", node, XPathConstants.STRING);
       if (!StringUtils.isBlank(bd)) {
         as.bitdepth = Integer.valueOf(bd.trim());
       }
     } catch (NumberFormatException e) {
       throw new IllegalStateException("Bit depth was malformatted: " + e.getMessage());
     }
 
     // channels
     try {
       String strChannels = (String) xpath.evaluate("channels/text()", node, XPathConstants.STRING);
       if (!StringUtils.isBlank(strChannels)) {
         as.channels = Integer.valueOf(strChannels.trim());
       }
     } catch (NumberFormatException e) {
       throw new IllegalStateException("Number of channels was malformatted: " + e.getMessage());
     }
 
     // sampling rate
     try {
       String sr = (String) xpath.evaluate("framerate/text()", node, XPathConstants.STRING);
       if (!StringUtils.isBlank(sr)) {
         as.samplingrate = Integer.valueOf(sr.trim());
       }
     } catch (NumberFormatException e) {
       throw new IllegalStateException("Frame rate was malformatted: " + e.getMessage());
     }
 
     // Bit rate
     try {
       String br = (String) xpath.evaluate("bitrate/text()", node, XPathConstants.STRING);
       if (!StringUtils.isBlank(br)) {
         as.bitrate = Float.valueOf(br.trim());
       }
     } catch (NumberFormatException e) {
       throw new IllegalStateException("Bit rate was malformatted: " + e.getMessage());
     }
 
     // Pk lev dB
     try {
       String pkLev = (String) xpath.evaluate("peakleveldb/text()", node, XPathConstants.STRING);
       if (!StringUtils.isBlank(pkLev)) {
         as.pkLevDb = Float.valueOf(pkLev.trim());
       }
     } catch (NumberFormatException e) {
       throw new IllegalStateException("Pk lev dB was malformatted: " + e.getMessage());
     }
 
     // RMS lev dB
     try {
       String rmsLev = (String) xpath.evaluate("rmsleveldb/text()", node, XPathConstants.STRING);
       if (!StringUtils.isBlank(rmsLev)) {
         as.rmsLevDb = Float.valueOf(rmsLev.trim());
       }
     } catch (NumberFormatException e) {
       throw new IllegalStateException("RMS lev dB was malformatted: " + e.getMessage());
     }
 
     // RMS Pk dB
     try {
       String rmsPk = (String) xpath.evaluate("rmspeakdb/text()", node, XPathConstants.STRING);
       if (!StringUtils.isBlank(rmsPk)) {
         as.rmsPkDb = Float.valueOf(rmsPk.trim());
       }
     } catch (NumberFormatException e) {
       throw new IllegalStateException("RMS Pk dB was malformatted: " + e.getMessage());
     }
 
     return as;
   }
 
   @Override
   public Integer getBitDepth() {
     return bitdepth;
   }
 
   @Override
   public Integer getChannels() {
     return channels;
   }
 
   @Override
   public Integer getSamplingRate() {
     return samplingrate;
   }
 
   @Override
   public Float getBitRate() {
     return bitrate;
   }
 
   @Override
   public Float getPkLevDb() {
     return pkLevDb;
   }
 
   @Override
   public Float getRmsLevDb() {
     return rmsLevDb;
   }
 
   @Override
   public Float getRmsPkDb() {
     return rmsPkDb;
   }
 
   // Setter
 
   public void setBitDepth(Integer bitdepth) {
     this.bitdepth = bitdepth;
   }
 
   public void setChannels(Integer channels) {
     this.channels = channels;
   }
 
   public void setSamplingRate(Integer samplingRate) {
     this.samplingrate = samplingRate;
   }
 
   public void setBitRate(Float bitRate) {
     this.bitrate = bitRate;
   }
 
   public void setPkLevDb(Float pkLevDb) {
     this.pkLevDb = pkLevDb;
   }
 
   public void setRmsLevDb(Float rmsLevDb) {
     this.rmsLevDb = rmsLevDb;
   }
 
   public void setRmsPkDb(Float rmsPkDb) {
     this.rmsPkDb = rmsPkDb;
   }
 
   @Override
   public void setCaptureDevice(String captureDevice) {
     this.device.type = captureDevice;
   }
 
   @Override
   public void setCaptureDeviceVersion(String captureDeviceVersion) {
     this.device.version = captureDeviceVersion;
   }
 
   @Override
   public void setCaptureDeviceVendor(String captureDeviceVendor) {
     this.device.vendor = captureDeviceVendor;
   }
 
   @Override
   public void setFormat(String format) {
     this.encoder.type = format;
   }
 
   @Override
   public void setFormatVersion(String formatVersion) {
     this.encoder.version = formatVersion;
   }
 
   @Override
   public void setEncoderLibraryVendor(String encoderLibraryVendor) {
     this.encoder.vendor = encoderLibraryVendor;
   }
 
 }