/*
   Copyright 2013 Nationale-Nederlanden

   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 nl.nn.adapterframework.webcontrol.action;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;

import javax.servlet.http.HttpServletResponse;

import nl.nn.adapterframework.monitoring.Monitor;
import nl.nn.adapterframework.monitoring.MonitorException;
import nl.nn.adapterframework.monitoring.MonitorManager;
import nl.nn.adapterframework.monitoring.SeverityEnum;
import nl.nn.adapterframework.util.AppConstants;
import nl.nn.adapterframework.util.Misc;
import nl.nn.adapterframework.util.XmlBuilder;

import org.apache.commons.digester.Digester;
import org.apache.commons.lang.StringUtils;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.upload.FormFile;


/**
 * Extension to transactionalstorage browser, that enables delete and repost.
 * 
 * @author  Gerrit van Brakel
 * @since   4.3
 */
public class ShowMonitorExecute extends ShowMonitors {
    
	protected String performAction(DynaActionForm monitorForm, String action, int index, int triggerIndex, HttpServletResponse response) throws MonitorException {
		log.debug("performing action ["+action+"] on monitorName nr ["+index+"]");
		MonitorManager mm = MonitorManager.getInstance();
		if (StringUtils.isEmpty(action)) {
			log.warn("monitorHandler did not find action");
			return null;
		}
		if (action.equals("edit")) {
			FormFile form_file=(FormFile) monitorForm.get("configFile");
	
			if (form_file!=null && form_file.getFileSize()>0) {
				log.debug("Upload of file ["+form_file.getFileName()+"] ContentType["+form_file.getContentType()+"]");
				Digester d=new Digester();
				mm.setDigesterRules(d);
				mm.getMonitors().clear();
				d.push(mm);
				try {
					d.parse(form_file.getInputStream());
				} catch (Exception e) {
					error("cannot parse file ["+form_file.getFileName()+"]",e);
				}
			} else {
				mm.updateDestinations((String[])monitorForm.get("selDestinations"));
			}
			mm.setEnabled(((Boolean)monitorForm.get("enabled")).booleanValue());
			return null;
		}
		if (action.equals("createMonitor")) {
			Monitor monitor=new Monitor();
			int i=1;
			while (mm.findMonitor("monitor "+i)!=null) {
				i++;
			}
			monitor.setName("monitor "+i);
			mm.addMonitor(monitor);
			return null;
		}
		if (action.equals("deleteMonitor")) {
			Monitor monitor=mm.getMonitor(index);
			if (monitor!=null) {
				log.info("removing monitor nr ["+index+"] name ["+monitor.getName()+"]");
				mm.removeMonitor(index);
			}
			return null;
		}
		if (action.equals("clearMonitor")) {
			Monitor monitor=mm.getMonitor(index);
			if (monitor!=null) {
				log.info("clearing monitor ["+monitor.getName()+"]");
				monitor.changeState(new Date(),false,SeverityEnum.WARNING,null,null,null);
			}
			return null;
		}
		if (action.equals("raiseMonitor")) {
			Monitor monitor=mm.getMonitor(index);
			if (monitor!=null) {
				log.info("raising monitor ["+monitor.getName()+"]");
				monitor.changeState(new Date(),true,SeverityEnum.WARNING,null,null,null);
			}
			return null;
		}
		if (action.equals("exportConfig")) {
			try {
				response.setContentType("text/xml; charset="+Misc.DEFAULT_INPUT_STREAM_ENCODING);
				response.setHeader("Content-Disposition","attachment; filename=\"monitorConfig-"+AppConstants.getInstance().getProperty("instance.name","")+".xml\"");
				PrintWriter writer=response.getWriter();

				XmlBuilder config = mm.toXml();
				writer.print(config.toXML());
				writer.close();
			} catch (IOException e) {
				error("could not export config",e);
			}
			return null;
		}
		log.debug("should performing action ["+action+"]");
		return null;
	}
}