/*
    * 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.application;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.apache.myfaces.tobago.internal.application.ViewHandlerImpl;
  import org.apache.myfaces.tobago.internal.webapp.TobagoResponse;
  import org.apache.myfaces.tobago.util.DebugUtils;
  import org.apache.myfaces.tobago.util.VariableResolverUtils;
  
  import javax.faces.FacesException;
  import javax.faces.application.ViewHandler;
  import javax.faces.component.UIViewRoot;
  import javax.faces.context.FacesContext;
  import javax.servlet.RequestDispatcher;
  import javax.servlet.ServletException;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  /*
   * Date: Nov 7, 2006
   * Time: 9:09:52 PM
   */
  public class FoViewHandlerImpl extends ViewHandlerImpl {
  
    private static final Logger LOG = LoggerFactory.getLogger(FoViewHandlerImpl.class);
  
    public FoViewHandlerImpl(ViewHandler base) {
      super(base);
    }
  
    public void renderView(FacesContext facesContext, UIViewRoot viewRoot)
        throws IOException, FacesException {
      String requestUri = viewRoot.getViewId();
  
      String contentType = VariableResolverUtils.resolveClientProperties(facesContext).getContentType();
      if (LOG.isDebugEnabled()) {
        LOG.debug("contentType = '" + contentType + "'");
      }
      if (contentType.indexOf("fo") == -1) {
        // standard
        super.renderView(facesContext, viewRoot);
      } else {
        try {
          // TODO PortletResponse ??
          if (facesContext.getExternalContext().getResponse() instanceof TobagoResponse) {
            ((TobagoResponse) facesContext.getExternalContext().getResponse()).setBuffering();
            // own dispatch
            HttpServletRequest request = (HttpServletRequest)
                facesContext.getExternalContext().getRequest();
            HttpServletResponse response = (HttpServletResponse)
                facesContext.getExternalContext().getResponse();
            RequestDispatcher requestDispatcher
                = request.getRequestDispatcher(requestUri);
            requestDispatcher.include(request, response);
            response.setContentType("application/pdf");
            String buffer =
                ((TobagoResponse) facesContext.getExternalContext().getResponse()).getBufferedString();
            ServletResponse servletResponse = (ServletResponse)
                facesContext.getExternalContext().getResponse();
            if (LOG.isDebugEnabled()) {
              LOG.debug("fo buffer: " + buffer);
            }
            FopConverter.fo2Pdf(servletResponse, buffer);
          }
        } catch (ServletException e) {
          IOException ex = new IOException();
          ex.initCause(e);
          throw ex;
        }
      }
      if (LOG.isDebugEnabled()) {
        LOG.debug("VIEW");
        LOG.debug(DebugUtils.toString(facesContext.getViewRoot(), 0));
      }
    }
  
  }