/*
    * Copyright (c) 2011-2024 PrimeFaces Extensions
    *
    *  Permission is hereby granted, free of charge, to any person obtaining a copy
    *  of this software and associated documentation files (the "Software"), to deal
    *  in the Software without restriction, including without limitation the rights
    *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    *  copies of the Software, and to permit persons to whom the Software is
    *  furnished to do so, subject to the following conditions:
   *
   *  The above copyright notice and this permission notice shall be included in
   *  all copies or substantial portions of the Software.
   *
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   *  THE SOFTWARE.
   */
  package org.primefaces.extensions.component.layout;
  
  import java.io.IOException;
  
  import javax.el.ValueExpression;
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  
  import org.primefaces.extensions.model.layout.LayoutOptions;
  import org.primefaces.extensions.util.Attrs;
  import org.primefaces.renderkit.CoreRenderer;
  import org.primefaces.util.FastStringWriter;
  import org.primefaces.util.LangUtils;
  import org.primefaces.util.WidgetBuilder;
  
  /**
   * Renderer for the {@link Layout} component.
   *
   * @author Oleg Varaksin / last modified by Melloware
   * @since 0.2
   */
  public class LayoutRenderer extends CoreRenderer {
  
      @Override
      public void decode(final FacesContext fc, final UIComponent component) {
          decodeBehaviors(fc, component);
      }
  
      @Override
      public void encodeBegin(final FacesContext fc, final UIComponent component) throws IOException {
          ResponseWriter writer = fc.getResponseWriter();
          final Layout layout = (Layout) component;
  
          final boolean buildOptions = layout.getOptions() == null;
          layout.setBuildOptions(buildOptions);
  
          if (buildOptions) {
              final FastStringWriter fsw = new FastStringWriter();
              layout.setOriginalWriter(writer);
              layout.setFastStringWriter(fsw);
              fc.setResponseWriter(writer.cloneWithWriter(fsw));
              writer = fc.getResponseWriter();
          }
  
          if (layout.isElementLayout()) {
              writer.startElement("div", layout);
              writer.writeAttribute("id", layout.getClientId(fc), "id");
  
              if (layout.getStyle() != null) {
                  writer.writeAttribute(Attrs.STYLE, layout.getStyle(), Attrs.STYLE);
              }
  
              if (layout.getStyleClass() != null) {
                  writer.writeAttribute(Attrs.CLASS, layout.getStyleClass(), "styleClass");
              }
          }
      }
  
      @Override
      public void encodeEnd(final FacesContext fc, final UIComponent component) throws IOException {
          final ResponseWriter writer = fc.getResponseWriter();
          final Layout layout = (Layout) component;
  
          if (layout.isElementLayout()) {
              if (!layout.isStateCookie()) {
                  // render hidden field for server-side state saving
                  final String clientId = layout.getClientId(fc);
                  renderHiddenInput(fc, clientId + "_state", null, false);
              }
  
              writer.endElement("div");
          }
  
          if (layout.isBuildOptions()) {
              fc.setResponseWriter(layout.getOriginalWriter());
              encodeScript(fc, layout);
              fc.getResponseWriter().write(layout.getFastStringWriter().toString());
             layout.removeOptions();
             layout.setOriginalWriter(null);
             layout.setFastStringWriter(null);
         }
         else {
             encodeScript(fc, layout);
         }
 
         layout.setBuildOptions(false);
     }
 
     protected void encodeScript(final FacesContext fc, final Layout layout) throws IOException {
         final WidgetBuilder wb = getWidgetBuilder(fc);
         wb.init("ExtLayout", layout);
         wb.attr("clientState", layout.isStateCookie());
         wb.attr("full", layout.isFullPage(), false);
 
         if (layout.isNested()) {
             wb.attr("parent", layout.getParent().getClientId(fc));
         }
 
         final ValueExpression stateVE = layout.getValueExpression(Layout.PropertyKeys.state.toString());
         if (stateVE != null && !layout.isFullPage() && !layout.isStateCookie()) {
             wb.attr("serverState", true);
 
             final String state = layout.getState();
             if (LangUtils.isNotBlank(state)) {
                 wb.attr("state", state);
             }
             else {
                 wb.nativeAttr("state", "{}");
             }
         }
         else {
             wb.attr("serverState", false);
         }
 
         final Object layoutOptions = layout.getOptions();
         if (layoutOptions instanceof LayoutOptions) {
             final LayoutOptions options = (LayoutOptions) layoutOptions;
             wb.append(",options:" + options.toJson());
         }
         else if (layoutOptions instanceof String) {
             // already serialized as JSON string
             wb.append(",options:" + layoutOptions);
         }
         else {
             wb.append(",options:{}");
         }
 
         encodeClientBehaviors(fc, layout);
 
         wb.finish();
     }
 }