/*
    * 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.Facets;
  import org.apache.myfaces.tobago.component.UIButton;
  import org.apache.myfaces.tobago.config.Configurable;
  import org.apache.myfaces.tobago.context.ResourceManagerUtils;
  import org.apache.myfaces.tobago.internal.component.AbstractUIForm;
  import org.apache.myfaces.tobago.internal.util.AccessKeyMap;
  import org.apache.myfaces.tobago.layout.Measure;
  import org.apache.myfaces.tobago.renderkit.CommandRendererBase;
  import org.apache.myfaces.tobago.renderkit.LabelWithAccessKey;
  import org.apache.myfaces.tobago.renderkit.css.Classes;
  import org.apache.myfaces.tobago.renderkit.css.Style;
  import org.apache.myfaces.tobago.renderkit.html.Command;
  import org.apache.myfaces.tobago.renderkit.html.CommandMap;
  import org.apache.myfaces.tobago.renderkit.html.DataAttributes;
  import org.apache.myfaces.tobago.renderkit.html.HtmlAttributes;
  import org.apache.myfaces.tobago.renderkit.html.HtmlButtonTypes;
  import org.apache.myfaces.tobago.renderkit.html.HtmlElements;
  import org.apache.myfaces.tobago.renderkit.html.JsonUtils;
  import org.apache.myfaces.tobago.renderkit.html.Popup;
  import org.apache.myfaces.tobago.renderkit.html.util.HtmlRendererUtils;
  import org.apache.myfaces.tobago.renderkit.util.RenderUtils;
  import org.apache.myfaces.tobago.util.ComponentUtils;
  import org.apache.myfaces.tobago.webapp.TobagoResponseWriter;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.faces.component.UIComponent;
  import javax.faces.component.ValueHolder;
  import javax.faces.context.FacesContext;
  import java.io.IOException;
  
  public class ButtonRenderer extends CommandRendererBase {
  
    private static final Logger LOG = LoggerFactory.getLogger(ButtonRenderer.class);
  
    public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException {
  
      final UIButton button = (UIButton) component;
      final String clientId = button.getClientId(facesContext);
      final boolean disabled = button.isDisabled();
      final LabelWithAccessKey label = new LabelWithAccessKey(button);
  
      final TobagoResponseWriter writer = HtmlRendererUtils.getTobagoResponseWriter(facesContext);
  
      writer.startElement(HtmlElements.BUTTON, button);
      writer.writeAttribute(HtmlAttributes.TYPE, HtmlButtonTypes.BUTTON, false);
      writer.writeNameAttribute(clientId);
      writer.writeIdAttribute(clientId);
      HtmlRendererUtils.writeDataAttributes(facesContext, writer, button);
      HtmlRendererUtils.renderTip(button, writer);
      writer.writeAttribute(HtmlAttributes.DISABLED, disabled);
  
      if (!disabled) {
        final ValueHolder confirmationFacet = (ValueHolder) component.getFacet(Facets.CONFIRMATION);
        final String confirmation = confirmationFacet != null ? "" + confirmationFacet.getValue() : null;
  
        final String url = RenderUtils.generateUrl(facesContext, button);
        final CommandMap map = new CommandMap();
        final String[] partialIds
            = HtmlRendererUtils.getComponentIdsAsList(facesContext, button, button.getRenderedPartially());
        final Popup popup = Popup.createPopup(button);
        final Command click = new Command(
            null, button.isTransition(), button.getTarget(), url, partialIds, null, confirmation, null, popup);
        if (button.getOnclick() != null) {
          click.setScript(button.getOnclick());
        }
        map.setClick(click);
        writer.writeAttribute(DataAttributes.COMMANDS, JsonUtils.encode(map), true);
  
        writer.writeAttribute(HtmlAttributes.HREF, "#", false);
  
        if (label.getAccessKey() != null) {
          writer.writeAttribute(HtmlAttributes.ACCESSKEY, Character.toString(label.getAccessKey()), false);
        }
  
        final Integer tabIndex = button.getTabIndex();
        if (tabIndex != null) {
         writer.writeAttribute(HtmlAttributes.TABINDEX, tabIndex);
       }
     }
 
     Style style = new Style(facesContext, button);
     writer.writeStyleAttribute(style);
     HtmlRendererUtils.renderDojoDndItem(component, writer, true);
     writer.writeClassAttribute(Classes.create(button));
     if (((UIButton) component).isDefaultCommand()) {
       final AbstractUIForm form = ComponentUtils.findAncestor(component, AbstractUIForm.class);
       writer.writeAttribute(DataAttributes.DEFAULT, form.getClientId(facesContext), false);
     }
     writer.flush(); // force closing the start tag
 
     String image = (String) button.getAttributes().get(Attributes.IMAGE);
     if (image != null) {
       if (ResourceManagerUtils.isAbsoluteResource(image)) {
         // absolute Path to image : nothing to do
       } else {
         image = getImageWithPath(facesContext, image, disabled);
       }
       writer.startElement(HtmlElements.IMG, null);
       writer.writeAttribute(HtmlAttributes.SRC, image, true);
       String tip = button.getTip();
       writer.writeAttribute(HtmlAttributes.ALT, tip != null ? tip : "", true);
       writer.endElement(HtmlElements.IMG);
     }
 
     if (label.getText() != null) {
       writer.startElement(HtmlElements.SPAN, null);
       HtmlRendererUtils.writeLabelWithAccessKey(writer, label);
       writer.endElement(HtmlElements.SPAN);
     }
 
     writer.endElement(HtmlElements.BUTTON);
     if (label.getAccessKey() != null) {
       if (LOG.isInfoEnabled()
           && !AccessKeyMap.addAccessKey(facesContext, label.getAccessKey())) {
         LOG.info("duplicated accessKey : " + label.getAccessKey());
       }
       HtmlRendererUtils.addClickAcceleratorKey(
           facesContext, button.getClientId(facesContext), label.getAccessKey());
     }
   }
 
   @Override
   public Measure getPreferredWidth(FacesContext facesContext, Configurable component) {
 
     UIButton button = (UIButton) component;
     Measure width = Measure.ZERO;
     boolean image = button.getImage() != null;
     if (image) {
       width = getResourceManager().getThemeMeasure(facesContext, button, "imageWidth");
     }
     LabelWithAccessKey label = new LabelWithAccessKey(button);
 
     width = width.add(RenderUtils.calculateStringWidth(facesContext, button, label.getText()));
     Measure padding = getResourceManager().getThemeMeasure(facesContext, button, "paddingWidth");
     // left padding, right padding and when an image and an text then a middle padding.
     width = width.add(padding.multiply(image && label.getText() != null ? 3 : 2));
 
     return width;
   }
 }