/*
 * Copyright 2000-2016 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.plugins.terminal.vfs;

import com.google.common.base.Predicate;
import com.google.common.collect.Lists;
import com.intellij.codeHighlighting.BackgroundEditorHighlighter;
import com.intellij.ide.structureView.StructureViewBuilder;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.fileEditor.FileEditor;
import com.intellij.openapi.fileEditor.FileEditorLocation;
import com.intellij.openapi.fileEditor.FileEditorState;
import com.intellij.openapi.fileEditor.ex.FileEditorManagerEx;
import com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.UserDataHolderBase;
import com.intellij.util.ConcurrencyUtil;
import com.jediterm.terminal.TtyConnectorWaitFor;
import com.jediterm.terminal.ui.TerminalAction;
import com.jediterm.terminal.ui.TerminalActionProviderBase;
import com.jediterm.terminal.ui.settings.TabbedSettingsProvider;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import java.awt.event.KeyEvent;
import java.beans.PropertyChangeListener;
import java.util.List;

/**
 * @author traff
 */
public class TerminalSessionEditor extends UserDataHolderBase implements FileEditor {

  private Project myProject;
  private final TerminalSessionVirtualFileImpl myFile;
  private final TtyConnectorWaitFor myWaitFor;

  public TerminalSessionEditor(Project project, @NotNull TerminalSessionVirtualFileImpl terminalFile) {
    myProject = project;
    myFile = terminalFile;

    final TabbedSettingsProvider settings = myFile.getSettingsProvider();

    myFile.getTerminal().setNextProvider(new TerminalActionProviderBase() {
      @Override
      public List<TerminalAction> getActions() {
        return Lists.newArrayList(
          new TerminalAction("Close Session", settings.getCloseSessionKeyStrokes(), new Predicate<KeyEvent>() {
            @Override
            public boolean apply(KeyEvent input) {
              handleCloseSession();
              return true;
            }
          }).withMnemonicKey(KeyEvent.VK_S)
        );
      }
    });

    myWaitFor = new TtyConnectorWaitFor(myFile.getTerminal().getTtyConnector(), ConcurrencyUtil.newSingleThreadExecutor("Terminal session"));

    myWaitFor
      .setTerminationCallback(new Predicate<Integer>() {
        @Override
        public boolean apply(Integer integer) {
          ApplicationManager.getApplication().invokeLater(() -> FileEditorManagerEx.getInstanceEx(myProject).closeFile(myFile));

          return true;
        }
      });
  }

  private void handleCloseSession() {
    myFile.getTerminal().close();
  }

  @NotNull
  @Override
  public JComponent getComponent() {
    return myFile.getTerminal();
  }

  @Nullable
  @Override
  public JComponent getPreferredFocusedComponent() {
    return myFile.getTerminal();
  }

  @NotNull
  @Override
  public String getName() {
    return myFile.getName();
  }

  @Override
  public void setState(@NotNull FileEditorState state) {

  }

  @Override
  public boolean isModified() {
    return false;
  }

  @Override
  public boolean isValid() {
    return true;
  }

  @Override
  public void selectNotify() {

  }

  @Override
  public void deselectNotify() {

  }

  @Override
  public void addPropertyChangeListener(@NotNull PropertyChangeListener listener) {

  }

  @Override
  public void removePropertyChangeListener(@NotNull PropertyChangeListener listener) {

  }

  @Nullable
  @Override
  public BackgroundEditorHighlighter getBackgroundHighlighter() {
    return null;
  }

  @Nullable
  @Override
  public FileEditorLocation getCurrentLocation() {
    return null;
  }

  @Nullable
  @Override
  public StructureViewBuilder getStructureViewBuilder() {
    return null;
  }

  @Override
  public void dispose() {
    Boolean closingToReopen = myFile.getUserData(FileEditorManagerImpl.CLOSING_TO_REOPEN);
    myWaitFor.detach();
    if (closingToReopen == null || !closingToReopen) {
      myFile.getTerminal().close();
    }
  }
}
