/*
    * 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.tobago.renderkit.html.scarborough.standard.tag;
  
  import org.apache.myfaces.tobago.component.Attributes;
  import org.apache.myfaces.tobago.component.UICommand;
  import org.apache.myfaces.tobago.context.ResourceManagerUtils;
  import org.apache.myfaces.tobago.internal.component.AbstractUIImage;
  import org.apache.myfaces.tobago.renderkit.LayoutComponentRendererBase;
  import org.apache.myfaces.tobago.renderkit.css.Classes;
  import org.apache.myfaces.tobago.renderkit.css.Style;
  import org.apache.myfaces.tobago.renderkit.html.HtmlAttributes;
  import org.apache.myfaces.tobago.renderkit.html.HtmlElements;
  import org.apache.myfaces.tobago.renderkit.html.util.HtmlRendererUtils;
  import org.apache.myfaces.tobago.webapp.TobagoResponseWriter;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import java.io.IOException;
  
  public class ImageRenderer extends LayoutComponentRendererBase {
  
    private static final Logger LOG = LoggerFactory.getLogger(ImageRenderer.class);
  
    public void prepareRender(FacesContext facesContext, UIComponent component) throws IOException {
      super.prepareRender(facesContext, component);
      HtmlRendererUtils.renderDojoDndSource(facesContext, component);
    }
  
    public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException {
  
      TobagoResponseWriter writer = HtmlRendererUtils.getTobagoResponseWriter(facesContext);
  
      AbstractUIImage image = (AbstractUIImage) component;
      final String value = image.getUrl();
      String src = value;
      if (src != null) {
        if (ResourceManagerUtils.isAbsoluteResource(src)) {
          // absolute Path to image : nothing to do
        } else {
          src = null;
          if (isDisabled(image)) {
            src = ResourceManagerUtils.getImageWithPath(facesContext,
                HtmlRendererUtils.createSrc(value, "Disabled"), true);
          }
          if (src == null) {
            src = ResourceManagerUtils.getImageWithPath(facesContext, value);
          }
        }
      }
  
      String border = (String) image.getAttributes().get(Attributes.BORDER);
      if (border == null) {
        border = "0";
      }
      String alt = (String) image.getAttributes().get(Attributes.ALT);
      if (alt == null) {
        alt = "";
      }
  
      writer.startElement(HtmlElements.IMG, image);
      final String clientId = image.getClientId(facesContext);
      writer.writeIdAttribute(clientId);
      HtmlRendererUtils.writeDataAttributes(facesContext, writer, image);
      if (src != null) {
        writer.writeAttribute(HtmlAttributes.SRC, src, true);
      }
      writer.writeAttribute(HtmlAttributes.ALT, alt, true);
      HtmlRendererUtils.renderTip(image, writer);
      writer.writeAttribute(HtmlAttributes.BORDER, border, false);
      Style style = new Style(facesContext, image);
      writer.writeStyleAttribute(style);
      HtmlRendererUtils.renderDojoDndItem(image, writer, true);
      writer.writeClassAttribute(Classes.create(image));
      writer.endElement(HtmlElements.IMG);
    }
  
    private String createSrc(String src, String ext) {
      int dot = src.lastIndexOf('.');
      if (dot == -1) {
       LOG.warn("Image src without extension: '" + src + "'");
       return src;
     } else {
       return src.substring(0, dot) + ext + src.substring(dot);
     }
   }
 
   private boolean isDisabled(AbstractUIImage graphic) {
     return graphic.isDisabled() 
         || (graphic.getParent() instanceof UICommand && ((UICommand) graphic.getParent()).isDisabled());
   }
 }