/*
    * Copyright 2010-2012 Capgemini
    * 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 net.sf.appstatus.web.pages;
  
  import static net.sf.appstatus.web.HtmlUtils.applyLayout;
  
  import java.io.IOException;
  import java.io.UnsupportedEncodingException;
  import java.util.Map;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.commons.lang3.text.StrBuilder;
  
  import net.sf.appstatus.web.IPage;
  import net.sf.appstatus.web.StatusWebHandler;
  
  public abstract class AbstractPage implements IPage {
  	private static final String ENCODING = "UTF-8";
  
  	private static final String PAGELAYOUT = "pageLayout.html";
  
  	private static final String URL = "http://appstatus.sourceforge.net/";
  
  	public abstract void doGet(StatusWebHandler webHandler, HttpServletRequest req, HttpServletResponse resp)
  			throws UnsupportedEncodingException, IOException;
  
  	public abstract void doPost(StatusWebHandler webHandler, HttpServletRequest req, HttpServletResponse resp);
  
  	public String getId() {
  		return null;
  	}
  
  	public String getName() {
  		return getId();
  	}
  
  	protected String getPage(final StatusWebHandler webHandler, final Map<String, String> valueMap)
  			throws UnsupportedEncodingException, IOException {
  
  		valueMap.put("css", "<link href=\"" + webHandler.getCssLocation() + "\" rel=\"stylesheet\">");
  
  		valueMap.put("UrlAppStatus", URL);
  
  		final StrBuilder menu = new StrBuilder();
  		for (final String pageId : webHandler.getPages().keySet()) {
  			final IPage page = webHandler.getPages().get(pageId);
  			if (StringUtils.equals(pageId, getId())) {
  				menu.append("<li class=active>");
  			} else {
  				menu.append("<li>");
  			}
  			menu.append("<a href=\"?p=" + page.getId() + "\">" + page.getName() + "</a></li>");
  		}
  		valueMap.put("menu", menu.toString());
  		valueMap.put("applicationName", webHandler.getApplicationName());
  
  		if (!valueMap.containsKey("js")) {
  			valueMap.put("js", "");
  		}
  
  		return applyLayout(valueMap, PAGELAYOUT);
  
  	}
  
  	protected void setup(final HttpServletResponse resp, final String type) throws IOException {
  		resp.setContentType(type);
  		resp.setCharacterEncoding(ENCODING);
  	}
  }