/*
 * 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 com.maddyhome.idea.copyright.actions;

import com.intellij.openapi.actionSystem.*;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.options.ShowSettingsUtil;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.openapi.ui.Messages;
import com.intellij.psi.PsiDocumentManager;
import com.intellij.psi.PsiFile;
import com.maddyhome.idea.copyright.CopyrightManager;
import com.maddyhome.idea.copyright.CopyrightUpdaters;
import com.maddyhome.idea.copyright.ui.CopyrightProjectConfigurable;
import org.jetbrains.annotations.Nullable;

public class GenerateCopyrightAction extends AnAction {
  public void update(AnActionEvent event) {
    Presentation presentation = event.getPresentation();
    DataContext context = event.getDataContext();
    Project project = CommonDataKeys.PROJECT.getData(context);
    if (project == null) {
      presentation.setEnabled(false);
      return;
    }

    PsiFile file = getFile(context, project);
    if (file == null || !CopyrightUpdaters.hasExtension(file)) {
      presentation.setEnabled(false);
    }
  }

  @Nullable
  private static PsiFile getFile(DataContext context, Project project) {
    PsiFile file = LangDataKeys.PSI_FILE.getData(context);
    if (file == null) {
      Editor editor = PlatformDataKeys.EDITOR.getData(context);
      if (editor != null) {
        file = PsiDocumentManager.getInstance(project).getPsiFile(editor.getDocument());
      }
    }
    return file;
  }

  public void actionPerformed(AnActionEvent event) {
    DataContext context = event.getDataContext();
    Project project = CommonDataKeys.PROJECT.getData(context);
    assert project != null;
    Module module = LangDataKeys.MODULE.getData(context);
    PsiDocumentManager.getInstance(project).commitAllDocuments();


    PsiFile file = getFile(context, project);
    assert file != null;
    if (CopyrightManager.getInstance(project).getCopyrightOptions(file) == null) {
      if (Messages.showOkCancelDialog(project, "No copyright configured for current file. Would you like to edit copyright settings?",
                                      "No Copyright Available", Messages.getQuestionIcon()) == DialogWrapper.OK_EXIT_CODE) {
        ShowSettingsUtil.getInstance().showSettingsDialog(project, new CopyrightProjectConfigurable(project).getDisplayName());
      }
      else {
        return;
      }
    }
    new UpdateCopyrightProcessor(project, module, file).run();
  }
}