/*
Copyright 2011-2016 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.editmode.actions;

import com.google.security.zynamics.zylib.gui.zygraph.editmode.IStateAction;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.AbstractZyGraph;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.IZyEditModeListener;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.edges.ZyGraphEdge;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.helpers.CEdgeHighlighter;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.helpers.CNodeHighlighter;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.helpers.CTooltipUpdater;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.editmode.states.CNodeEnterState;
import com.google.security.zynamics.zylib.yfileswrap.gui.zygraph.nodes.ZyGraphNode;

import y.base.Node;

import java.awt.event.MouseEvent;

/**
 * Describes the default actions which are executed as soon as the mouse cursor enters a node.
 */
public class CDefaultNodeEnterAction<NodeType extends ZyGraphNode<?>, EdgeType extends ZyGraphEdge<?, ?, ?>>
    implements IStateAction<CNodeEnterState<NodeType, EdgeType>> {
  /**
   * Highlights the edges that are attached to the node that is entered.
   * 
   * @param node The node that is entered.
   */
  protected void highlightEdges(final Node node) {
    CEdgeHighlighter.highlightEdgesOfNode(node, true);
  }

  /**
   * Highlights the entered node.
   * 
   * @param node The node that is entered.
   */
  protected void highlightNode(final Node node) {
    CNodeHighlighter.highlightNode(node, true);
  }

  /**
   * Updates the tooltip that is shown in the graph depending on the entered node.
   * 
   * @param graph The graph that contains the node.
   * @param node The node that is entered.
   */
  protected void updateTooltip(final AbstractZyGraph<?, ?> graph, final Node node) {
    CTooltipUpdater.updateNodeTooltip(graph, node);
  }

  @Override
  public void execute(final CNodeEnterState<NodeType, EdgeType> state, final MouseEvent event) {
    highlightNode(state.getNode());
    highlightEdges(state.getNode());
    updateTooltip(state.getGraph(), state.getNode());

    final AbstractZyGraph<NodeType, EdgeType> graph = state.getGraph();

    final NodeType node = graph.getNode(state.getNode());

    for (final IZyEditModeListener<NodeType, EdgeType> listener : state.getStateFactory()
        .getListeners()) {
      try {
        listener.nodeEntered(node, event);
      } catch (final Exception exception) {
        // TODO: log this
      }
    }

    graph.updateViews();
  }
}
