/*
 * 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.intellij.uiDesigner.designSurface;

import com.intellij.openapi.actionSystem.*;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.ui.popup.PopupOwner;
import com.intellij.uiDesigner.FormEditingUtil;
import com.intellij.uiDesigner.actions.*;
import com.intellij.uiDesigner.componentTree.ComponentTree;
import com.intellij.uiDesigner.propertyInspector.DesignerToolWindowManager;
import com.intellij.uiDesigner.radComponents.RadComponent;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.util.ArrayList;

/**
 * @author Anton Katilin
 * @author Vladimir Kondratyev
 */
public final class GlassLayer extends JComponent implements DataProvider, PopupOwner {
  private final GuiEditor myEditor;
  private static final Logger LOG = Logger.getInstance("#com.intellij.uiDesigner.designSurface.GlassLayer");
  private Point myLastMousePosition;

  public GlassLayer(final GuiEditor editor){
    myEditor = editor;
    enableEvents(AWTEvent.KEY_EVENT_MASK | AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK);

    registerKeyboardAction(new MoveSelectionToRightAction(myEditor, false, false), IdeActions.ACTION_EDITOR_MOVE_CARET_RIGHT);
    registerKeyboardAction(new MoveSelectionToLeftAction(myEditor, false, false), IdeActions.ACTION_EDITOR_MOVE_CARET_LEFT);
    registerKeyboardAction(new MoveSelectionToUpAction(myEditor, false, false), IdeActions.ACTION_EDITOR_MOVE_CARET_UP);
    registerKeyboardAction(new MoveSelectionToDownAction(myEditor, false, false), IdeActions.ACTION_EDITOR_MOVE_CARET_DOWN);

    registerKeyboardAction(new MoveSelectionToRightAction(myEditor, true, false), "EditorRightWithSelection");
    registerKeyboardAction(new MoveSelectionToLeftAction(myEditor, true, false), "EditorLeftWithSelection");
    registerKeyboardAction(new MoveSelectionToUpAction(myEditor, true, false), "EditorUpWithSelection");
    registerKeyboardAction(new MoveSelectionToDownAction(myEditor, true, false), "EditorDownWithSelection");

    registerKeyboardAction(new MoveSelectionToRightAction(myEditor, false, true), "EditorLineEnd");
    registerKeyboardAction(new MoveSelectionToLeftAction(myEditor, false, true), "EditorLineStart");
    registerKeyboardAction(new MoveSelectionToUpAction(myEditor, false, true), "EditorPageUp");
    registerKeyboardAction(new MoveSelectionToDownAction(myEditor, false, true), "EditorPageDown");

    registerKeyboardAction(new MoveSelectionToRightAction(myEditor, true, true), "EditorLineEndWithSelection");
    registerKeyboardAction(new MoveSelectionToLeftAction(myEditor, true, true), "EditorLineStartWithSelection");
    registerKeyboardAction(new MoveSelectionToUpAction(myEditor, true, true), "EditorPageUpWithSelection");
    registerKeyboardAction(new MoveSelectionToDownAction(myEditor, true, true), "EditorPageDownWithSelection");

    registerKeyboardAction(new MoveComponentAction(-1, 0, 0, 0), "EditorScrollUp");
    registerKeyboardAction(new MoveComponentAction(1, 0, 0, 0), "EditorScrollDown");
    registerKeyboardAction(new MoveComponentAction(0, -1, 0, 0), "EditorPreviousWord");
    registerKeyboardAction(new MoveComponentAction(0, 1, 0, 0), "EditorNextWord");

    registerKeyboardAction(new MoveComponentAction(0, 0, -1, 0), IdeActions.ACTION_MOVE_STATEMENT_UP_ACTION);
    registerKeyboardAction(new MoveComponentAction(0, 0, 1, 0), IdeActions.ACTION_MOVE_STATEMENT_DOWN_ACTION);
    registerKeyboardAction(new MoveComponentAction(0, 0, 0, -1), "EditorPreviousWordWithSelection");
    registerKeyboardAction(new MoveComponentAction(0, 0, 0, 1), "EditorNextWordWithSelection");

    registerKeyboardAction(new SelectAllComponentsAction(), "$SelectAll");

    // F2 should start inplace editing
    final StartInplaceEditingAction startInplaceEditingAction = new StartInplaceEditingAction(editor);
    startInplaceEditingAction.registerCustomShortcutSet(
      new CustomShortcutSet(KeyStroke.getKeyStroke(KeyEvent.VK_F2, 0)),
      this
    );
  }

  private void registerKeyboardAction(final AnAction action, @NonNls final String actionId) {
    action.registerCustomShortcutSet(
      ActionManager.getInstance().getAction(actionId).getShortcutSet(),
      this
    );
  }

  protected void processKeyEvent(final KeyEvent e){
    myEditor.myProcessor.processKeyEvent(e);
    if (!e.isConsumed()) {
      super.processKeyEvent(e);
    }
  }

  protected void processMouseEvent(final MouseEvent e){
    if(e.getID() == MouseEvent.MOUSE_PRESSED){
      requestFocusInWindow();
    }
    try {
      myEditor.myProcessor.processMouseEvent(e);
    }
    catch(Exception ex) {
      LOG.error(ex);
    }
  }

  protected void processMouseMotionEvent(final MouseEvent e){
    myLastMousePosition = e.getPoint();
    try {
      myEditor.myProcessor.processMouseEvent(e);
    }
    catch(Exception ex) {
      LOG.error(ex);
    }
  }

  @NotNull
  public Point getLastMousePosition() {
    if (myLastMousePosition == null) {
      return new Point(10, 10);
    }
    return myLastMousePosition;
  }

  /**
   * Provides {@link PlatformDataKeys#NAVIGATABLE} to navigate to
   * binding of currently selected component (if any)
   */
  public Object getData(final String dataId) {
    if(CommonDataKeys.NAVIGATABLE.is(dataId)) {
      final ComponentTree componentTree = DesignerToolWindowManager.getInstance(myEditor).getComponentTree();
      if (componentTree != null) {
        return componentTree.getData(dataId);
      }
    }
    return null;
  }

  @Nullable
  public Point getBestPopupPosition() {
    final ArrayList<RadComponent> selection = FormEditingUtil.getSelectedComponents(myEditor);
    if (selection.size() > 0) {
      final RadComponent component = selection.get(0);
      final Rectangle bounds = component.getBounds();
      int bottom = bounds.height > 4 ? bounds.y+bounds.height-4 : bounds.y;
      int left = bounds.width > 4 ? bounds.x+4 : bounds.x;
      Point pnt = new Point(left, bottom);  // the location needs to be within the component
      return SwingUtilities.convertPoint(component.getParent().getDelegee(), pnt, this);
    }
    return null;
  }
}