/**

  * Copyright 2010 The Kuali Foundation Licensed under the

  * Educational Community 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.osedu.org/licenses/ECL-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.kuali.student.common.ui.client.widgets;

 import org.kuali.student.common.ui.client.application.Application;

 import org.kuali.student.common.ui.client.application.ApplicationContext;

 import org.kuali.student.common.ui.client.logging.Logger;

 import org.kuali.student.common.ui.client.mvc.Callback;

 import org.kuali.student.common.ui.client.widgets.buttongroups.ButtonEnumerations.OkEnum;

 import org.kuali.student.common.ui.client.widgets.buttongroups.OkGroup;

 import com.google.gwt.core.client.GWT;

 import com.google.gwt.user.client.Command;

 import com.google.gwt.user.client.DeferredCommand;

 import com.google.gwt.user.client.Window;

 import com.google.gwt.user.client.ui.SimplePanel;

 import com.google.gwt.user.client.ui.VerticalPanel;

 public class KSErrorDialog {

     final static ApplicationContext context = Application.getApplicationContext();

     public enum MessagesRequired {

         DIALOG_TITLE("errorDialogTitle"),

         DESCRIBE_ACTION("describeAction"),

         ERROR_DESCRIPTION("errorDescription");

         private String messageId;

         private MessagesRequired(String messageId) {

             this.messageId = messageId;

         }

         public String toString() {

             return this.messageId;

         }

     }

     public static void bindUncaughtExceptionHandler() {

         GWT.setUncaughtExceptionHandler(new GWT.UncaughtExceptionHandler() {

             public void onUncaughtException(Throwable e) {

                 GWT.log(e.getMessage(), e);

                 Window.alert("Uncaught exception was thrown:"+getStackTrace(e)+"\nMessage:"+e.getMessage());

                     KSErrorDialog.show(e);

             }

         });

     }

     private static String getStackTrace(Throwable t){

             StringBuilder sb =  new StringBuilder();

             appendStackTrace(t,sb);

             return sb.toString();

     }

     private static void appendStackTrace(Throwable t, StringBuilder s) {

         s.append(t.toString());

         s.append(": at\n");

         StackTraceElement[] stack = t.getStackTrace();

         for (StackTraceElement frame : stack) {

             s.append(frame.toString());

             s.append("\n");

         }

     }

     public static void show(final Throwable error) {

         final KSLightBox lightbox = new KSLightBox();

         final VerticalPanel panel = new VerticalPanel();

         panel.addStyleName("KS-Error-Dialog");

         final KSLabel title = new KSLabel(context.getMessage(MessagesRequired.DIALOG_TITLE.toString()));

         title.addStyleName("KS-Error-Dialog-Title");

         final KSLabel errorDescriptionLabel = new KSLabel(context.getMessage(MessagesRequired.ERROR_DESCRIPTION.toString()));

         errorDescriptionLabel.addStyleName("KS-Error-Dialog-Label");

         final SimplePanel errorDescriptionPanel = new SimplePanel();

         errorDescriptionPanel.addStyleName("KS-Error-Dialog-Panel");

         final KSTextArea errorDescription = new KSTextArea();

         errorDescription.setText(getErrorDescription(error));

         errorDescription.addStyleName("KS-Error-Dialog-TextArea");

         errorDescription.setReadOnly(true);

         //errorDescription.setEnabled(false);

         errorDescriptionPanel.add(errorDescription);

 /*        final KSLabel describeActionLabel = new KSLabel(context.getMessage(MessagesRequired.DESCRIBE_ACTION.toString()));

         describeActionLabel.addStyleName(KSStyles.KS_ERROR_DIALOG_LABEL);

         final SimplePanel actionDescriptionPanel = new SimplePanel();

         actionDescriptionPanel.addStyleName(KSStyles.KS_ERROR_DIALOG_PANEL);

         final KSTextArea actionDescription = new KSTextArea();

         actionDescription.addStyleName(KSStyles.KS_ERROR_DIALOG_TEXTAREA);

         actionDescriptionPanel.add(actionDescription);

 */

         final OkGroup buttonPanel = new OkGroup(new Callback<OkEnum>(){

             @Override

             public void exec(OkEnum result) {

                 switch(result){

                     case Ok:

                         DeferredCommand.addCommand(new Command() {

                             public void execute() {

                                 sendReport(error/*, actionDescription.getText()*/);

                                 lightbox.hide();

                             }

                         });

                         break;

                 }

             }

         });

         panel.add(title);

         panel.add(errorDescriptionLabel);

         panel.add(errorDescriptionPanel);

 //        panel.add(describeActionLabel);

 //        panel.add(actionDescriptionPanel);

         panel.add(buttonPanel);

         panel.setSize("100", "100");

         lightbox.setWidget(panel);

         lightbox.setSize(440, 200);

         lightbox.show();

     }

     private static String getErrorDescription(Throwable error) {

         // TODO maybe retrieve more error info

         return error.getMessage();

     }

     private static void sendReport(final Throwable error/*, final String actionDescription*/) {

         // TODO actually gather client context info, such as browser version, user id, etc

         Logger.getClientContextInfo().put("logType", "clientError");

 //        Logger.getClientContextInfo().put("actionDescription", actionDescription);

         Logger.error("Uncaught exception", error);

         Logger.sendLogs();

         // hack, clear out context info, should probably find a better way of doing this

         Logger.getClientContextInfo().clear();

     }

 }