/*
 * Copyright 2000-2014 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.intellij.byteCodeViewer;

import com.intellij.codeInsight.lookup.LookupManager;
import com.intellij.icons.AllIcons;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.actionSystem.DataContext;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.compiler.CompilerManager;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.progress.Task;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.ui.popup.JBPopup;
import com.intellij.openapi.ui.popup.JBPopupFactory;
import com.intellij.openapi.util.Computable;
import com.intellij.openapi.util.Disposer;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.*;
import com.intellij.psi.impl.source.tree.injected.InjectedLanguageUtil;
import com.intellij.psi.util.PsiUtilBase;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.ui.awt.RelativePoint;
import com.intellij.util.Processor;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * @author anna
 * @since 5/4/12
 */
public class ShowByteCodeAction extends AnAction {
  @Override
  public void update(AnActionEvent e) {
    e.getPresentation().setEnabled(false);
    e.getPresentation().setIcon(AllIcons.Toolwindows.Documentation);
    final Project project = e.getData(CommonDataKeys.PROJECT);
    if (project != null) {
      final PsiElement psiElement = getPsiElement(e.getDataContext(), project, e.getData(CommonDataKeys.EDITOR));
      if (psiElement != null) {
        if (psiElement.getContainingFile() instanceof PsiClassOwner &&
            ByteCodeViewerManager.getContainingClass(psiElement) != null) {
          e.getPresentation().setEnabled(true);
        }
      }
    }
  }

  @Override
  public void actionPerformed(AnActionEvent e) {
    final DataContext dataContext = e.getDataContext();
    final Project project = CommonDataKeys.PROJECT.getData(dataContext);
    if (project == null) return;
    final Editor editor = CommonDataKeys.EDITOR.getData(dataContext);

    final PsiElement psiElement = getPsiElement(dataContext, project, editor);
    if (psiElement == null) return;

    final String psiElementTitle = ByteCodeViewerManager.getInstance(project).getTitle(psiElement);

    final VirtualFile virtualFile = PsiUtilCore.getVirtualFile(psiElement);
    if (virtualFile == null) return;

    final RelativePoint bestPopupLocation = JBPopupFactory.getInstance().guessBestPopupLocation(dataContext);

    final SmartPsiElementPointer element = SmartPointerManager.getInstance(project).createSmartPsiElementPointer(psiElement);
    ProgressManager.getInstance().run(new Task.Backgroundable(project, "Looking for bytecode...") {
      private String myByteCode;
      private String myErrorMessage;
      private String myErrorTitle;

      @Override
      public void run(@NotNull ProgressIndicator indicator) {
        if (ProjectRootManager.getInstance(project).getFileIndex().isInContent(virtualFile) && isMarkedForCompilation(project, virtualFile)) {
          myErrorMessage = "Unable to show bytecode for '" + psiElementTitle + "'. Class file does not exist or is out-of-date.";
          myErrorTitle = "Class File Out-Of-Date";
        }
        else {
          myByteCode = ApplicationManager.getApplication().runReadAction(new Computable<String>() {
            @Override
            public String compute() {
              return ByteCodeViewerManager.getByteCode(psiElement);
            }
          });
        }
      }

      @Override
      public void onSuccess() {
        if (project.isDisposed()) return;

        if (myErrorMessage != null && myTitle != null) {
          Messages.showWarningDialog(project, myErrorMessage, myErrorTitle);
          return;
        }
        final PsiElement targetElement = element.getElement();
        if (targetElement == null) return;

        final ByteCodeViewerManager codeViewerManager = ByteCodeViewerManager.getInstance(project);
        if (codeViewerManager.hasActiveDockedDocWindow()) {
          codeViewerManager.doUpdateComponent(targetElement, myByteCode);
        }
        else {
          if (myByteCode == null) {
            Messages.showErrorDialog(project, "Unable to parse class file for '" + psiElementTitle + "'.", "Bytecode not Found");
            return;
          }
          final ByteCodeViewerComponent component = new ByteCodeViewerComponent(project, null);
          component.setText(myByteCode, targetElement);
          Processor<JBPopup> pinCallback = popup -> {
            codeViewerManager.recreateToolWindow(targetElement, targetElement);
            popup.cancel();
            return false;
          };

          final JBPopup popup = JBPopupFactory.getInstance().createComponentPopupBuilder(component, null)
            .setProject(project)
            .setDimensionServiceKey(project, ShowByteCodeAction.class.getName(), false)
            .setResizable(true)
            .setMovable(true)
            .setRequestFocus(LookupManager.getActiveLookup(editor) == null)
            .setTitle(psiElementTitle + " Bytecode")
            .setCouldPin(pinCallback)
            .createPopup();
          Disposer.register(popup, component);

          if (editor != null) {
            popup.showInBestPositionFor(editor);
          } else {
            popup.show(bestPopupLocation);
          }
        }
      }
    });
  }

  private static boolean isMarkedForCompilation(Project project, VirtualFile virtualFile) {
    final CompilerManager compilerManager = CompilerManager.getInstance(project);
    return !compilerManager.isUpToDate(compilerManager.createFilesCompileScope(new VirtualFile[]{virtualFile}));
  }

  @Nullable
  private static PsiElement getPsiElement(DataContext dataContext, Project project, Editor editor) {
    PsiElement psiElement = null;
    if (editor == null) {
      psiElement = CommonDataKeys.PSI_ELEMENT.getData(dataContext);
    } else {
      final PsiFile file = PsiUtilBase.getPsiFileInEditor(editor, project);
      final Editor injectedEditor = InjectedLanguageUtil.getEditorForInjectedLanguageNoCommit(editor, file);
      if (injectedEditor != null) {
        PsiFile psiFile = PsiUtilBase.getPsiFileInEditor(injectedEditor, project);
        psiElement = psiFile != null ? psiFile.findElementAt(injectedEditor.getCaretModel().getOffset()) : null;
      }

      if (file != null && psiElement == null) {
        psiElement = file.findElementAt(editor.getCaretModel().getOffset());
      }
    }

    return psiElement;
  }
}

@@ -17,17 +17,17 @@
 2000-201
-4
+6
  JetBrai
@@ -2834,50 +2834,21 @@
 t = 
-CommonDataKeys.PROJECT.getData(dataContext
+e.getProject(
 );%0A 
@@ -2905,16 +2905,26 @@
 ditor = 
+e.getData(
 CommonDa
@@ -2936,36 +2936,16 @@
 s.EDITOR
-.getData(dataContext
 );%0A%0A    
@@ -6789,16 +6789,36 @@
 ement = 
+dataContext.getData(
 CommonDa
@@ -6839,28 +6839,8 @@
 MENT
-.getData(dataContext
 );%0A 

simplify getting project from AnActionEvent