/*
Copyright 2015 Google Inc. All Rights Reserved.

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.google.security.zynamics.zylib.yfileswrap.gui.zygraph;

import com.google.security.zynamics.zylib.general.ClipboardHelpers;
import com.google.security.zynamics.zylib.gui.zygraph.functions.NodeFunctions;
import com.google.security.zynamics.zylib.gui.zygraph.helpers.GraphHelpers;
import com.google.security.zynamics.zylib.gui.zygraph.helpers.SelectedVisibleFilter;
import com.google.security.zynamics.zylib.gui.zygraph.nodes.IViewNode;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.functions.MoveFunctions;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.functions.ZoomFunctions;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.nodes.ZyGraphNode;

import y.view.Graph2DView;
import y.view.Graph2DViewActions;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.Collection;

import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.KeyStroke;

public class CRegisterHotKeys {
  public static <NodeType extends ZyGraphNode<?>> void register(
      final AbstractZyGraph<NodeType, ?> graph) {
    final Graph2DView view = graph.getView();

    final Graph2DViewActions actions = new Graph2DViewActions(view);
    final ActionMap amap = actions.createActionMap();
    final InputMap imap = actions.createDefaultInputMap(amap);

    view.setActionMap(amap);
    view.setInputMap(JComponent.WHEN_FOCUSED, imap);
    view.getCanvasComponent().setActionMap(amap);
    view.getCanvasComponent().setInputMap(JComponent.WHEN_FOCUSED, imap);

    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0), "DOWN");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0), "UP");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0), "LEFT");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0), "RIGHT");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, 0), "+");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, 0), "-");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_M, 0), "m");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_S, 0), "s");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_LESS, 0), "<");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_A, KeyEvent.CTRL_DOWN_MASK), "SELECT_VISIBLE_NODES");
    imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_C, KeyEvent.CTRL_DOWN_MASK),
        "COPY_CONTENT_FROM_SELECTED_NODES");

    amap.remove(Graph2DViewActions.DELETE_SELECTION);
    amap.remove(Graph2DViewActions.EDIT_LABEL);

    registerActions(graph);
  }

  public static <NodeType extends ZyGraphNode<?>> void registerActions(
      final AbstractZyGraph<NodeType, ?> graph) {
    final ActionMap amap = graph.getView().getCanvasComponent().getActionMap();

    amap.put("DOWN", new CActionHotKey<NodeType>("DOWN", graph));
    amap.put("UP", new CActionHotKey<NodeType>("UP", graph));
    amap.put("LEFT", new CActionHotKey<NodeType>("LEFT", graph));
    amap.put("RIGHT", new CActionHotKey<NodeType>("RIGHT", graph));
    amap.put("+", new CActionHotKey<NodeType>("+", graph));
    amap.put("-", new CActionHotKey<NodeType>("-", graph));
    amap.put("m", new CActionHotKey<NodeType>("m", graph));
    amap.put("s", new CActionHotKey<NodeType>("s", graph));
    amap.put("<", new CActionHotKey<NodeType>("<", graph));
    amap.put("SELECT_VISIBLE_NODES", new CActionHotKey<NodeType>("SELECT_VISIBLE_NODES", graph));
    amap.put("COPY_CONTENT_FROM_SELECTED_NODES", new CActionHotKey<NodeType>(
        "COPY_CONTENT_FROM_SELECTED_NODES", graph));

    graph.getView().setActionMap(amap);
    graph.getView().getCanvasComponent().setActionMap(amap);

  }

  public static <NodeType extends ZyGraphNode<?>> void unregisterActions(
      final AbstractZyGraph<NodeType, ?> graph) {
    final ActionMap amap1 = graph.getView().getCanvasComponent().getActionMap();
    final ActionMap amap2 = graph.getView().getActionMap();

    amap1.remove("F2");
    amap1.remove("DOWN");
    amap1.remove("UP");
    amap1.remove("LEFT");
    amap1.remove("RIGHT");
    amap1.remove("+");
    amap1.remove("-");
    amap1.remove("m");
    amap1.remove("s");
    amap1.remove("<");
    amap1.remove("SELECT_VISIBLE_NODES");
    amap1.remove("COPY_CONTENT_FROM_SELECTED_NODES");

    amap2.remove("DOWN");
    amap2.remove("UP");
    amap2.remove("LEFT");
    amap2.remove("RIGHT");
    amap2.remove("+");
    amap2.remove("-");
    amap2.remove("m");
    amap2.remove("s");
    amap2.remove("<");
    amap2.remove("SELECT_VISIBLE_NODES");
    amap2.remove("COPY_CONTENT_FROM_SELECTED_NODES");
  }

  private static class CActionHotKey<NodeType extends ZyGraphNode<? extends IViewNode<?>>> extends
      AbstractAction {
    private static final long serialVersionUID = 4029488848855226091L;

    private final String m_action;

    private final AbstractZyGraph<NodeType, ?> m_graph;

    public CActionHotKey(final String action, final AbstractZyGraph<NodeType, ?> graph) {
      super(action);

      m_action = action;

      m_graph = graph;
    }

    @Override
    public void actionPerformed(final ActionEvent event) {
      if (m_action.equals("UP")) {
        MoveFunctions.pan(m_graph, 0, -1);
      } else if (m_action.equals("DOWN")) {
        MoveFunctions.pan(m_graph, 0, 1);
      } else if (m_action.equals("LEFT")) {
        MoveFunctions.pan(m_graph, -1, 0);
      } else if (m_action.equals("RIGHT")) {
        MoveFunctions.pan(m_graph, 1, 0);
      } else if (m_action.equals("+")) {
        m_graph.zoomIn();
      } else if (m_action.equals("-")) {
        m_graph.zoomOut();
      } else if (m_action.equals("m")) {
        m_graph.getView().fitContent(true);
      } else if (m_action.equals("s")) {
        ZoomFunctions
            .zoomToNodes(m_graph, SelectedVisibleFilter.filter(m_graph.getSelectedNodes()));
      } else if (m_action.equals("SELECT_VISIBLE_NODES")) {
        // Use a temporary variable to work around OpenJDK build problem. Original code is:
        // m_graph.selectNodes(NodeFunctions.getVisibleNodes(m_graph), true);
        final Collection<NodeType> nodes = NodeFunctions.getVisibleNodes(m_graph);

        m_graph.selectNodes(nodes, true);
      } else if (m_action.equals("COPY_CONTENT_FROM_SELECTED_NODES")) {
        ClipboardHelpers.copyToClipboard(GraphHelpers.getSelectedContent(m_graph));
      }
    }
  }
}
