/* 
    * Licensed 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.esigate.aggregator;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.http.client.methods.CloseableHttpResponse;
  import org.esigate.Driver;
  import org.esigate.HttpErrorPage;
  import org.esigate.http.HttpResponseUtils;
  import org.esigate.parser.Adapter;
  import org.esigate.parser.Element;
  import org.esigate.parser.ElementType;
  import org.esigate.parser.ParserContext;
  import org.esigate.tags.TemplateRenderer;
  
  class IncludeTemplateElement implements Element {
      public static final ElementType TYPE = new ElementType() {
          @Override
          public boolean isStartTag(String tag) {
              return tag.startsWith("<!--$includetemplate$");
          }
  
          @Override
          public boolean isEndTag(String tag) {
              return tag.startsWith("<!--$endincludetemplate$");
          }
  
          @Override
          public Element newInstance() {
              return new IncludeTemplateElement();
          }
  
          @Override
          public boolean isSelfClosing(String tag) {
              return false;
          }
  
      };
  
      private Driver driver;
      private String page;
      private String name;
      private final Map<String, String> params = new HashMap<>();
      private Appendable out;
  
      @Override
      public boolean onError(Exception e, ParserContext ctx) {
          return false;
      }
  
      @Override
      public boolean onTagStart(String tag, ParserContext ctx) {
          this.out = new Adapter(ctx.getCurrent());
  
          ElementAttributes tagAttributes = ElementAttributesFactory.createElementAttributes(tag);
          this.driver = tagAttributes.getDriver();
          this.page = tagAttributes.getPage();
          this.name = tagAttributes.getName();
  
          return true;
      }
  
      @Override
      public void onTagEnd(String tag, ParserContext ctx) throws IOException, HttpErrorPage {
          CloseableHttpResponse response =
                  driver.render(page, ctx.getHttpRequest().getOriginalRequest(),
                          new TemplateRenderer(name, params, page), new AggregateRenderer());
          out.append(HttpResponseUtils.toString(response));
      }
  
      public void addParam(String paramName, String value) {
          params.put(paramName, value);
      }
  
      @Override
      public void characters(CharSequence csq, int start, int end) {
          // Just ignore tag body
      }
  
  }