/*
    * 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.gchart;
  
  import java.io.IOException;
  
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import javax.faces.context.ResponseWriter;
  
  import org.primefaces.extensions.component.gchart.model.GChartModel;
  import org.primefaces.renderkit.CoreRenderer;
  import org.primefaces.util.LangUtils;
  import org.primefaces.util.WidgetBuilder;
  
  public class GChartRenderer extends CoreRenderer {
  
      @Override
      public void decode(final FacesContext context, final UIComponent component) {
          super.decode(context, component);
          decodeBehaviors(context, component);
      }
  
      @Override
      public void encodeEnd(final FacesContext context, final UIComponent component) throws IOException {
          final GChart gChart = (GChart) component;
  
          encodeMarkup(context, gChart);
          encodeScript(context, gChart);
      }
  
      protected void encodeMarkup(final FacesContext context, final GChart chart) throws IOException {
          final ResponseWriter writer = context.getResponseWriter();
  
          renderHiddenInput(context, chart.getClientId() + "_hidden", null, false);
  
          writer.startElement("div", chart);
          writer.writeAttribute("id", chart.getClientId(), null);
          writer.endElement("div");
      }
  
      protected void encodeScript(final FacesContext context, final GChart chart) throws IOException {
          String apiKey = chart.getApiKey();
          if (LangUtils.isBlank(apiKey)) {
              apiKey = getApiKey(context);
          }
  
          final WidgetBuilder wb = getWidgetBuilder(context);
          wb.init("ExtGChart", chart)
                      .attr("chart", ((GChartModel) chart.getValue()).toJson())
                      .attr("title", chart.getTitle())
                      .attr("apiKey", apiKey)
                      .attr("language", chart.getLanguage())
                      .attr("width", chart.getWidth())
                      .attr("height", chart.getHeight());
          if (chart.getExtender() != null) {
              wb.nativeAttr("extender", chart.getExtender());
          }
          encodeClientBehaviors(context, chart);
  
          wb.finish();
      }
  
      protected String getApiKey(final FacesContext context) {
          String key;
          try {
              final String initParam = context.getExternalContext().getInitParameter(GChart.API_KEY);
              key = context.getApplication().evaluateExpressionGet(context, initParam, String.class);
          }
          catch (final Exception e) {
              key = null;
          }
          return key;
      }
  }