/*
    * Copyright 2008 The Kuali Foundation
    * 
    * Licensed 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://www.opensource.org/licenses/ecl2.php
    * 
   * 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.kuali.ole.sys.document.web.renderers;
  
  import java.io.IOException;
  
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.JspWriter;
  import javax.servlet.jsp.PageContext;
  import javax.servlet.jsp.tagext.Tag;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.ole.sys.document.web.util.RendererUtil;
  import org.kuali.rice.core.api.util.KeyValue;
  
  /**
   * Renders a control as a group of radio buttons
   */
  public class RadioButtonGroupRenderer extends FieldRendererBase {
  
      /**
       * 
       * @see org.kuali.ole.sys.document.web.renderers.Renderer#render(javax.servlet.jsp.PageContext, javax.servlet.jsp.tagext.Tag)
       */
      public void render(PageContext pageContext, Tag parentTag) throws JspException {
          JspWriter out = pageContext.getOut();
          
          try {
              out.write(buildRadioButtons());
              renderQuickFinderIfNecessary(pageContext, parentTag);
              if (isShowError()) {
                  renderErrorIcon(pageContext);
              }
              RendererUtil.registerEditableProperty(pageContext, getFieldName());
          }
          catch (IOException ioe) {
              throw new JspException("Difficulty rendering radio buttons", ioe);
          }
      }
  
      /**
       * Builds radio buttons for all the valid values on the field
       * @param propertyPrefix the property path from the form to the business object being rendered
       * @return a String containing the HTML for all the radio buttons
       */
      protected String buildRadioButtons() {
          StringBuilder radioButtons = new StringBuilder();
          for (Object keyLabelPairAsObject : getField().getFieldValidValues()) {
              radioButtons.append(buildRadioButton((KeyValue)keyLabelPairAsObject));
          }
          return radioButtons.toString();
      }
      
      /**
       * Given a KeyValue, generates a radio buttion representing it
       * @param keyLabelPair the key label pair to turn into a radio button
       * @param propertyPrefix the property path from the form to the business object being rendered
       * @return the HTML for the represented radio button
       */
      protected String buildRadioButton(KeyValue keyLabelPair) {
          StringBuilder radioButton = new StringBuilder();
          
          radioButton.append("<input type=\"radio\"");
          
          if (getField().getPropertyValue().equalsIgnoreCase(keyLabelPair.getKey().toString())) {
              radioButton.append(" checked=\"checked\"");
          }
          
          radioButton.append(" title=\"");
          radioButton.append(this.getAccessibleTitle());
          radioButton.append("\"");
          
          radioButton.append(" name=\"");
          radioButton.append(getFieldName());
          radioButton.append("\"");
          
          radioButton.append(" id=\"");
          radioButton.append(getFieldName()+"_"+keyLabelPair.getKey().toString().replaceAll("\\W", "_"));
          radioButton.append("\"");
          
          radioButton.append(" value=\"");
          radioButton.append(keyLabelPair.getKey());
          radioButton.append("\"");
          
          String onBlur = buildOnBlur();
          if (!StringUtils.isBlank(onBlur)) {
             radioButton.append(" ");
             radioButton.append(onBlur);
         }
         
         radioButton.append(" /> ");
         radioButton.append(keyLabelPair.getValue());
         radioButton.append(" ");
         
         return radioButton.toString();
     }
 
     /**
      * No quickfinder
      * @see org.kuali.ole.sys.document.web.renderers.FieldRenderer#renderQuickfinder()
      */
     public boolean renderQuickfinder() {
         return false;
     }
     
 }