/*
 * Copyright 2003-2011 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 jetbrains.mps.ide.project;

import com.intellij.application.options.pathMacros.PathMacroConfigurable;
import com.intellij.ide.DataManager;
import com.intellij.notification.Notification;
import com.intellij.notification.NotificationListener;
import com.intellij.notification.NotificationType;
import com.intellij.notification.Notifications;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.actionSystem.PlatformDataKeys;
import com.intellij.openapi.application.PathMacros;
import com.intellij.openapi.components.ApplicationComponent;
import com.intellij.openapi.options.ShowSettingsUtil;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.project.ProjectManager;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.util.AsyncResult.Handler;
import jetbrains.mps.ide.MPSCoreComponents;
import jetbrains.mps.project.PathMacrosProvider;
import jetbrains.mps.util.EqualUtil;
import org.jetbrains.annotations.NotNull;

import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkEvent.EventType;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

public class WorkbenchPathMacros implements ApplicationComponent, PathMacrosProvider {
  public WorkbenchPathMacros(MPSCoreComponents coreComponents, PathMacros ideaPathMacros) {
  }

  @NotNull
  @Override
  public String getComponentName() {
    return "Workbench path macros provider";
  }

  @Override
  public void initComponent() {
    jetbrains.mps.project.PathMacros.getInstance().addMacrosProvider(this);
  }

  @Override
  public void disposeComponent() {
    jetbrains.mps.project.PathMacros.getInstance().removeMacrosProvider(this);
  }

  @Override
  public Set<String> getNames() {
    return PathMacros.getInstance().getAllMacroNames();
  }

  @Override
  public Set<String> getUserNames() {
    return PathMacros.getInstance().getUserMacroNames();
  }

  @Override
  public String getValue(String name) {
    return PathMacros.getInstance().getValue(name);
  }

  @Override
  public void report(String message, String macro) {
    Notifications.Bus.notify(new Notification(Notifications.SYSTEM_MESSAGES_GROUP_ID, "Undefined macro", macro + " <html><a href=''>fix...</a></html>", NotificationType.ERROR, new NotificationListener() {
      @Override
      public void hyperlinkUpdate(@NotNull Notification notification, @NotNull HyperlinkEvent event) {
        if (event.getEventType() != EventType.ACTIVATED) return;
        DataManager.getInstance().getDataContextFromFocus().doWhenDone(new Handler<DataContext>() {
          @Override
          public void run(DataContext dataContext) {
            Project project = PlatformDataKeys.PROJECT.getData(dataContext);

            Map<String, String> oldMacroses = collectMacroses();
            ShowSettingsUtil.getInstance().showSettingsDialog(project, new PathMacroConfigurable().getDisplayName());
            Map<String, String> newMacroses = collectMacroses();
            if (sameMaps(oldMacroses, newMacroses)) return;

            int res = Messages.showYesNoDialog(
              "All opened projects should be reloaded in order to apply changes.\n" +
                "Reload all opened projects?", "Reload Projects", null);
            if (res == Messages.NO) return;

            ProjectManager pm = ProjectManager.getInstance();
            for (Project p : pm.getOpenProjects()) {
              pm.reloadProject(p);
            }
          }
        });
      }
    }));
  }

  private boolean sameMaps(Map<String, String> m1, Map<String, String> m2) {
    Set<String> keys = new HashSet<String>();
    keys.addAll(m1.keySet());
    keys.addAll(m2.keySet());

    for (String key : keys) {
      if (!EqualUtil.equals(m1.get(key), m2.get(key))) return false;
    }
    return true;
  }

  private Map<String, String> collectMacroses() {
    HashMap<String, String> res = new HashMap<String, String>();
    PathMacros pm = PathMacros.getInstance();
    for (String name : pm.getUserMacroNames()) {
      res.put(name, pm.getValue(name));
    }
    return res;
  }
}