package net.admin4j.ui.servlets;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import net.admin4j.config.Admin4JConfiguration;

 import net.admin4j.deps.commons.lang3.StringUtils;

 import net.admin4j.log.LogManager;

 import net.admin4j.log.LogManagerRegistry;

 import net.admin4j.util.Admin4jRuntimeException;

 import net.admin4j.vo.LoggerProductVO;

 public class LogLevelServlet extends AdminDisplayServlet 

 {

         private static final long serialVersionUID = -2723639589464533505L;

         public static final String CHANGE_TYPE_SHOW_MORE = "showMore";

         public static final String CHANGE_TYPE_SHOW_LESS = "showLess";

         public static final String CHANGE_TYPE_CLEAR = "clear";

     public static final String NONE = "None";

     public static final String PUBLIC_HANDLE="logLevel";

         @Override

         protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 

         {

                 response.setContentType("text/html");

                 List<LoggerProductVO> logList = new ArrayList<LoggerProductVO>();

                 Map<String, LogManager> logManagerMap = new HashMap<String, LogManager>();

                 for (LogManager logManager: LogManagerRegistry.getAvailableLogManagerSet()) {

                     logList.add( new LoggerProductVO(logManager.getLoggerSoftwareProductName(), logManager.findLoggers()));

                     logManagerMap.put(logManager.getLoggerSoftwareProductName(), logManager);

                 }

                 String message = performLogLevelChange(request, logManagerMap);

                 logList = new ArrayList<LoggerProductVO>();

                 logManagerMap = new HashMap<String, LogManager>();

                 for (LogManager logManager: LogManagerRegistry.getAvailableLogManagerSet()) {

             logList.add( new LoggerProductVO(logManager.getLoggerSoftwareProductName(), logManager.findLoggers()));

             logManagerMap.put(logManager.getLoggerSoftwareProductName(), logManager);

         }

         Map<String,Object> variableMap = new HashMap<String,Object>();

         variableMap.put("message", message);

         variableMap.put("loggerList", logList);

         variableMap.put("configuration", new Admin4JConfiguration());

         displayFreeMarkerPage(request, response, "logLevelServletDisplay.ftl", variableMap);

         }

         private String performLogLevelChange(HttpServletRequest request, Map<String, LogManager> logManagerMap)

         {

                 String requestedLoggerType = request.getParameter("loggerType");

                 String requestedLoggerName = request.getParameter("loggerName");

                 String requestedChangeType = request.getParameter("changeType");

                 if (StringUtils.isBlank(requestedLoggerType))

                         return "";

                 LogManager logManager = logManagerMap.get(requestedLoggerType);

                 if (logManager == null) {

                     logger.error("Something's wrong -- Log Manager not listed.", 

                             new Admin4jRuntimeException("Something's wrong -- Log MAnager not listed.")

                             .addContextValue("requestedLoggerType", requestedLoggerType));

                     return "Something's wrong -- Log Manager not listed.";

                 }

                 if (CHANGE_TYPE_SHOW_MORE.equals(requestedChangeType)) {

                     try {

                 return requestedLoggerName + ":Changed to level: " + logManager.performLogLevelChange(requestedLoggerName, LogManager.LogIncrementType.SHOW_MORE);

             } catch (RuntimeException e) {

                 logger.error("Error increasing log level", e);

                 return "Error changing log level.  More details in the log.";

             }

                 }

                 else if (CHANGE_TYPE_SHOW_LESS.equals(requestedChangeType)) {

                     try {

                         return requestedLoggerName + ":Changed to level: " + logManager.performLogLevelChange(requestedLoggerName, LogManager.LogIncrementType.SHOW_LESS);

                     } catch (RuntimeException e) {

                 logger.error("Error decreasing log level", e);

                 return "Error changing log level.  More details in the log.";

             }

                 }

                 else if (CHANGE_TYPE_CLEAR.equals(requestedChangeType)) {

                     try {

                         logManager.performLogLevelChange(requestedLoggerName, LogManager.LogIncrementType.CLEAR);

                         return requestedLoggerName + ": cleared";

                     } catch (RuntimeException e) {

                 logger.error("Error clearing log level", e);

                 return "Error changing log level.  More details in the log.";

             }

         }

                 else

                         return "The loggerType requested was not found: "+requestedLoggerType;

         }

         /* (non-Javadoc)

      * @see net.admin4j.ui.servlets.Admin4JServlet#getServletLabel()

      */

     @Override

     public String getServletLabel() {

         return "Log Level Manager";

     }

 }