/*
    * 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;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.myfaces.tobago.internal.util.FacesContextUtils;
  import org.apache.myfaces.tobago.layout.Measure;
  import org.apache.myfaces.tobago.model.PageState;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.apache.myfaces.tobago.internal.component.AbstractUIPage;
  import org.apache.myfaces.tobago.layout.Box;
  import org.apache.myfaces.tobago.util.ComponentUtils;
  
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import java.util.StringTokenizer;
  
  public class PageRendererBase extends LayoutComponentRendererBase {
  
    private static final Logger LOG = LoggerFactory.getLogger(PageRendererBase.class);
  
    public void decode(FacesContext facesContext, UIComponent component) {
      if (component instanceof AbstractUIPage) {
        AbstractUIPage page = (AbstractUIPage) component;
  
        decodeActionPosition(facesContext, page);
        decodePageState(facesContext, page);
      }
    }
  
    private void decodeActionPosition(FacesContext facesContext, AbstractUIPage page) {
      String actionIdName = page.getClientId(facesContext) + ComponentUtils.SUB_SEPARATOR + "form-action";
      String newActionId = (String) facesContext.getExternalContext().getRequestParameterMap().get(actionIdName);
      if (LOG.isDebugEnabled()) {
        LOG.debug("action = " + newActionId);
      }
      page.setActionId(newActionId);
      FacesContextUtils.setActionId(facesContext, newActionId);
      try {
        String actionPositionName = page.getClientId(facesContext) + ComponentUtils.SUB_SEPARATOR + "action-position";
        String actionPositionString = (String)
            facesContext.getExternalContext().getRequestParameterMap().get(actionPositionName);
        if (LOG.isDebugEnabled()) {
          LOG.debug("actionPosition='" + actionPositionString + "'");
        }
        if (StringUtils.isNotEmpty(actionPositionString)) {
          Box actionPosition = new Box(actionPositionString);
          page.setActionPosition(actionPosition);
        } else {
          page.setActionPosition(null);
        }
      } catch (Exception e) {
        LOG.warn("Can't analyse parameter for action-position", e);
      }
    }
  
    @SuppressWarnings("unchecked")
    private void decodePageState(FacesContext facesContext, AbstractUIPage page) {
      String name;
      String value = null;
      try {
        name = page.getClientId(facesContext) + ComponentUtils.SUB_SEPARATOR + "form-clientDimension";
        value = (String) facesContext.getExternalContext().getRequestParameterMap().get(name);
        if (value != null) {
          StringTokenizer tokenizer = new StringTokenizer(value, ";");
          Measure width = Measure.parse(tokenizer.nextToken());
          Measure height = Measure.parse(tokenizer.nextToken());
          // XXX remove me later
          PageState pageState = page.getPageState(facesContext);
          if (pageState != null) {
            pageState.setClientWidth(width.getPixel());
            pageState.setClientHeight(height.getPixel());
          }
          facesContext.getExternalContext().getRequestMap().put("tobago-page-clientDimension-width", width);
          facesContext.getExternalContext().getRequestMap().put("tobago-page-clientDimension-height", height);
        }
      } catch (Exception e) {
        LOG.error("Error in decoding state: value='" + value + "'", e);
      }
    }
  }