/*
    * 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.apache.myfaces.custom.selectOneRow;
  
  import java.io.IOException;
  import java.util.Map;
  
  import javax.faces.component.UIComponent;
  import javax.faces.component.UIData;
  import javax.faces.component.UIInput;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  import javax.faces.el.ValueBinding;
  
  import org.apache.myfaces.shared_tomahawk.config.MyfacesConfig;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
  
  /**
   * 
   * @JSFRenderer
   *   renderKitId = "HTML_BASIC" 
   *   family = "org.apache.myfaces.SelectOneRow"
   *   type = "org.apache.myfaces.SelectOneRow"
   * @since 1.1.7
   */
  public class SelectOneRowRenderer extends HtmlRenderer
  {
  
      public void encodeBegin(FacesContext facesContext, UIComponent component) throws IOException
      {
          if ((component instanceof SelectOneRow) && component.isRendered())
          {
              SelectOneRow row = (SelectOneRow) component;
              String clientId = row.getClientId(facesContext);
  
              ResponseWriter writer = facesContext.getResponseWriter();
  
              writer.startElement(HTML.INPUT_ELEM, row);
              writer.writeAttribute(HTML.TYPE_ATTR, HTML.INPUT_TYPE_RADIO, null);
              writer.writeAttribute(HTML.NAME_ATTR, row.getGroupName(), null);
  
              if (isDisabled(facesContext, row))
              {
                  writer.writeAttribute(HTML.DISABLED_ATTR, HTML.DISABLED_ATTR, null);
              }
              
              writer.writeAttribute(HTML.ID_ATTR, clientId, null);
  
              if (isRowSelected(row))
              {
                  writer.writeAttribute(HTML.CHECKED_ATTR, HTML.CHECKED_ATTR, null);
              }
  
              writer.writeAttribute(HTML.VALUE_ATTR, clientId, null);
  
              HtmlRendererUtils.renderHTMLAttributes(writer, row, HTML.INPUT_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED);
  
              writer.endElement(HTML.INPUT_ELEM);
          }
      }
      
      /**
       * Check if the component is disabled or not, taking into account
       * the config init param org.apache.myfaces.READONLY_AS_DISABLED_FOR_SELECTS 
       */
      protected boolean isDisabled(FacesContext facesContext, SelectOneRow row)
      {
          boolean disabled = row.isDisabled();
          boolean readonly = row.isReadonly();
          if (!disabled && readonly)
          {
              disabled = MyfacesConfig.getCurrentInstance(facesContext
                              .getExternalContext()).isReadonlyAsDisabledForSelect();
          }
          return disabled;        
      }
  
      private boolean isRowSelected(UIComponent component)
      {
          UIInput input = (UIInput) component;
          Object value = input.getValue();
 
         int currentRowIndex = getCurrentRowIndex(component);
 
         return (value != null)
                 && (currentRowIndex == ((Number) value).intValue());
 
     }
 
     private int getCurrentRowIndex(UIComponent component)
     {
         UIData uidata = findUIData(component);
         if (uidata == null)
             return -1;
         else
             return uidata.getRowIndex();
     }
 
     protected UIData findUIData(UIComponent uicomponent)
     {
         if (uicomponent == null)
             return null;
         if (uicomponent instanceof UIData)
             return (UIData) uicomponent;
         else
             return findUIData(uicomponent.getParent());
     }
 
     public void decode(FacesContext context, UIComponent uiComponent)
     {
         if (! (uiComponent instanceof SelectOneRow))
         {
             return;
         }
 
         if (!uiComponent.isRendered())
         {
             return;
         }
         SelectOneRow row = (SelectOneRow) uiComponent;
 
         Map requestMap = context.getExternalContext().getRequestParameterMap();
         String postedValue;
 
         if (requestMap.containsKey(row.getGroupName()))
         {
             postedValue = (String) requestMap.get(row.getGroupName());
             String clientId = row.getClientId(context);
             if (clientId.equals(postedValue))
             {
                 String[] postedValueArray = postedValue.split(":");
                 String rowIndex = postedValueArray[postedValueArray.length - 2];
 
                 ValueBinding vb = row.getValueBinding("value");
                 Class type = vb.getType(context);
                 if (type == null)
                 {
                     type = (vb.getValue(context) != null) ? vb.getValue(context).getClass() : null;
                 }
                 Object newValue = null;
                 if (type != null)
                 {
                     if (type.isAssignableFrom(Long.class))
                     {
                         newValue = Long.valueOf(rowIndex);
                     }
                     else
                     {
                         newValue = Integer.valueOf(rowIndex);
                     }
                 }
                 else
                 {
                     newValue = Integer.valueOf(rowIndex);
                 }
                 //the value to go in conversion&validation
                 row.setSubmittedValue(newValue);
                 row.setValid(true);
             }
         }
     }
 }