/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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 org.jetbrains.idea.maven.utils;

import com.intellij.notification.*;
import com.intellij.openapi.project.Project;
import com.intellij.util.ui.update.MergingUpdateQueue;
import com.intellij.util.ui.update.Update;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.idea.maven.project.MavenProjectsManager;
import org.jetbrains.idea.maven.project.ProjectBundle;

import javax.swing.event.HyperlinkEvent;

public class MavenImportNotifier extends MavenSimpleProjectComponent {
  private static final String MAVEN_IMPORT_NOTIFICATION_GROUP = "Maven Import";

  private MavenProjectsManager myMavenProjectsManager;
  private MergingUpdateQueue myUpdatesQueue;

  private Notification myNotification;

  public MavenImportNotifier(Project p, MavenProjectsManager mavenProjectsManager) {
    super(p);
    
    if (!isNormalProject()) return;

    NotificationsConfiguration.getNotificationsConfiguration().register(MAVEN_IMPORT_NOTIFICATION_GROUP,
                                                                        NotificationDisplayType.STICKY_BALLOON,
                                                                        true);

    myMavenProjectsManager = mavenProjectsManager;

    myUpdatesQueue = new MergingUpdateQueue(getComponentName(), 500, false, MergingUpdateQueue.ANY_COMPONENT, myProject);

    myMavenProjectsManager.addManagerListener(new MavenProjectsManager.Listener() {
      public void activated() {
        init();
      }

      public void projectsScheduled() {
        scheduleUpdate(false);
      }

      @Override
      public void importAndResolveScheduled() {
        scheduleUpdate(true);
      }
    });
  }

  private void init() {
    myUpdatesQueue.activate();
  }

  @Override
  public void disposeComponent() {
    if (myNotification != null) myNotification.expire();
  }

  private void scheduleUpdate(final boolean close) {
    myUpdatesQueue.queue(new Update(myUpdatesQueue) {
      public void run() {
        doUpdateNotifications(close);
      }
    });
  }

  private void doUpdateNotifications(boolean close) {
    if (close) {
      if (myNotification == null) return;

      myNotification.expire();
      myNotification = null;
    }
    else {
      if (myNotification != null && !myNotification.isExpired()) return;

      myNotification = new Notification(MAVEN_IMPORT_NOTIFICATION_GROUP,
                                        ProjectBundle.message("maven.project.changed"),
                                        "<a href='reimport'>" + ProjectBundle.message("maven.project.importChanged") + "</a> " +
                                        "<a href='autoImport'>" + ProjectBundle.message("maven.project.enableAutoImport") + "</a>",
                                        NotificationType.INFORMATION, new NotificationListener.Adapter() {
        @Override
        protected void hyperlinkActivated(@NotNull Notification notification, @NotNull HyperlinkEvent event) {
          if (event.getDescription().equals("reimport")) {
            myMavenProjectsManager.scheduleImportAndResolve();
          }
          if (event.getDescription().equals("autoImport")) {
            myMavenProjectsManager.getImportingSettings().setImportAutomatically(true);
          }
          notification.expire();
          myNotification = null;
        }
      });

      Notifications.Bus.notify(myNotification, myProject);
    }
  }
}