/*
    * 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.Facets;
  import org.apache.myfaces.tobago.component.UIPanel;
  import org.apache.myfaces.tobago.component.UIReload;
  import org.apache.myfaces.tobago.internal.component.AbstractUIPanel;
  import org.apache.myfaces.tobago.internal.util.FacesContextUtils;
  import org.apache.myfaces.tobago.layout.Measure;
  import org.apache.myfaces.tobago.renderkit.LayoutComponentRendererBase;
  import org.apache.myfaces.tobago.renderkit.css.Classes;
  import org.apache.myfaces.tobago.renderkit.css.Position;
  import org.apache.myfaces.tobago.renderkit.css.Style;
  import org.apache.myfaces.tobago.renderkit.html.DataAttributes;
  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.renderkit.util.RenderUtils;
  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 javax.faces.context.ResponseWriter;
  import java.io.IOException;
  
  public class PanelRenderer extends LayoutComponentRendererBase {
  
    private static final Logger LOG = LoggerFactory.getLogger(PanelRenderer.class);
  
    @Override
    public void prepareRender(FacesContext facesContext, UIComponent component) throws IOException {
      super.prepareRender(facesContext, component);
      HtmlRendererUtils.renderDojoDndSource(facesContext, component);
    }
  
    @Override
    public boolean getRendersChildren() {
      return true;
    }
  
    @Override
    public void encodeChildren(FacesContext facesContext, UIComponent uiComponent) throws IOException {
      UIPanel component = (UIPanel) uiComponent;
      for (UIComponent child : component.getChildren()) {
        RenderUtils.encode(facesContext, child);
      }
    }
  
    @Override
    public void encodeBegin(FacesContext facesContext, UIComponent component) throws IOException {
      
      // UIPanel or UICell (deprecated)
      AbstractUIPanel panel = (AbstractUIPanel) component;
      TobagoResponseWriter writer = HtmlRendererUtils.getTobagoResponseWriter(facesContext);
  
      String clientId = panel.getClientId(facesContext);
      writer.startElement(HtmlElements.DIV, panel);
      HtmlRendererUtils.renderDojoDndItem(panel, writer, true);
      writer.writeIdAttribute(clientId);
      writer.writeClassAttribute(Classes.create(panel));
      HtmlRendererUtils.writeDataAttributes(facesContext, writer, panel);
      Style style = new Style(facesContext, panel);
      // XXX hotfix for panels in sheets
      if (style.getPosition() == null) {
        style.setPosition(Position.RELATIVE);
      }
      writer.writeStyleAttribute(style);
      if (panel instanceof UIPanel && ((UIPanel) panel).getTip() != null) {
        writer.writeAttribute(HtmlAttributes.TITLE, ((UIPanel) panel).getTip(), true);
      }
  
      // TODO check ajax id?
      if (!FacesContextUtils.isAjax(facesContext)) {
        UIComponent facetReload = panel.getFacet(Facets.RELOAD);
        if (facetReload != null && facetReload instanceof UIReload && facetReload.isRendered()) {
          UIReload update = (UIReload) facetReload;
          writer.writeAttribute(DataAttributes.RELOAD, Integer.toString(update.getFrequency()), false);
        }
      }
     HtmlRendererUtils.renderCommandFacet(panel, facesContext, writer);
     HtmlRendererUtils.encodeContextMenu(facesContext, writer, panel);
 
     //HtmlRendererUtils.checkForCommandFacet(panel, facesContext, writer);
 
     final Measure borderLeft = panel.getBorderLeft();
     final Measure borderRight = panel.getBorderRight();
     final Measure borderTop = panel.getBorderTop();
     final Measure borderBottom = panel.getBorderBottom();
 
     if (borderLeft.greaterThan(Measure.ZERO) || borderRight.greaterThan(Measure.ZERO)
         || borderTop.greaterThan(Measure.ZERO) || borderBottom.greaterThan(Measure.ZERO)) {
       writer.startElement(HtmlElements.DIV, panel);
       writer.writeClassAttribute(Classes.create(panel, "content")); // needed to be scrollable inside of the panel
       final Style inner = new Style(facesContext, panel);
       // Todo: FIXME (be null may occur in sheets)
       if (inner.getWidth() != null) {
         inner.setWidth(inner.getWidth().subtract(borderLeft).subtract(borderRight));
       }
       // Todo: FIXME (be null may occur in sheets)
       if (inner.getHeight() != null) {
         inner.setHeight(inner.getHeight().subtract(borderTop).subtract(borderBottom));
       }
       inner.setLeft(borderLeft);
       inner.setTop(borderTop);
       writer.writeStyleAttribute(inner);
     }
   }
 
   @Override
   public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException {
     ResponseWriter writer = facesContext.getResponseWriter();
     AbstractUIPanel panel = (AbstractUIPanel) component;
     
     final Measure borderLeft = panel.getBorderLeft();
     final Measure borderRight = panel.getBorderRight();
     final Measure borderTop = panel.getBorderTop();
     final Measure borderBottom = panel.getBorderBottom();
 
     if (borderLeft.greaterThan(Measure.ZERO) || borderRight.greaterThan(Measure.ZERO)
         || borderTop.greaterThan(Measure.ZERO) || borderBottom.greaterThan(Measure.ZERO)) {
     writer.endElement(HtmlElements.DIV);
     }
     writer.endElement(HtmlElements.DIV);
   }
 }