/*
 * Copyright 2013 Corpuslinguistic working group Humboldt University Berlin.
 *
 * 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 annis.gui.components;

import annis.gui.frequency.FrequencyResultPanel;
import static annis.libgui.Helper.encodeGeneric;
import annis.service.objects.FrequencyTable;
import com.vaadin.annotations.JavaScript;
import com.vaadin.server.AbstractClientConnector;
import com.vaadin.ui.AbstractJavaScriptComponent;
import com.vaadin.ui.JavaScriptFunction;
import elemental.json.JsonArray;
import java.util.LinkedList;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
import org.json.JSONException;

/**
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
@JavaScript(value =
{
  "flotr2.js", "vaadin://jquery.js", "frequencychart.js"
})
public class FrequencyWhiteboard extends AbstractJavaScriptComponent implements OnLoadCallbackExtension.Callback
{
  public static final int PIXEL_PER_VALUE = 45;
  public static final int ADDTIONAL_PIXEL_WIDTH = 100;

  public enum Scale
  {
    LINEAR("linear"), LOG10("logarithmic");
    
    public final String desc;
    Scale(String desc)
    {
      this.desc = desc;
    }
  }
  
  private List<String> labels;
  private List<Long> values;
  private Scale lastScale;
  private String lastFont;
  private float lastFontSize = 10.0f;
  
  public FrequencyWhiteboard(final FrequencyResultPanel freqPanel)
  {  
    setHeight("100%");
    setWidth("200px");
    addStyleName("frequency-chart");
    
    addFunction("selectRow", new JavaScriptFunction() {

      @Override
      public void call(JsonArray arguments) throws JSONException
      {
        freqPanel.selectRow((int) arguments.getNumber(0));
      }
    });
    
    
    OnLoadCallbackExtension ext = new OnLoadCallbackExtension(this);
    ext.extend((FrequencyWhiteboard) this);
    
  }
  @Override
  public void beforeClientResponse(boolean initial)
  {
    super.beforeClientResponse(initial);
    if(labels != null && values != null && lastScale != null && lastFont != null)
    {
      callFunction("showData", encodeGeneric(labels), encodeGeneric(values), 
        lastScale.desc, lastFont, lastFontSize);
    }
  }
  
  
  
  public void setFrequencyData(FrequencyTable table, Scale scale, String font, 
    float fontSize)
  {
    labels = new LinkedList<>();
    values = new LinkedList<>();

    for (FrequencyTable.Entry e : table.getEntries())
    {
      labels.add(StringUtils.join(e.getTupel(), "/") + " (" + e.getCount() + ")");
      values.add(e.getCount());
    }
    setWidth(ADDTIONAL_PIXEL_WIDTH + (PIXEL_PER_VALUE * values.size()), Unit.PIXELS);
    lastScale = scale;
    lastFont = font;
    lastFontSize = fontSize;
    
//    callFunction("showData", labels, values, lastScale.desc, lastFont, lastFontSize);
  }
  
  
  @Override
  public boolean onCompononentLoaded(AbstractClientConnector source)
  {
    if(labels != null && values != null && lastScale != null && lastFont != null)
    {
      callFunction("showData", encodeGeneric(labels), encodeGeneric(values), 
        lastScale.desc, lastFont, lastFontSize);
    }
    return true;
  }
  
  
}