/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.jmeter.report.gui.tree;

import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;

import org.apache.jmeter.control.gui.ReportGui;
import org.apache.jmeter.gui.ReportGuiPackage;
import org.apache.jmeter.gui.ReportMainFrame;
import org.apache.jmeter.report.gui.action.ReportDragNDrop;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

public class ReportTreeListener implements TreeSelectionListener, MouseListener, KeyListener, MouseMotionListener {
	private static final Logger log = LoggingManager.getLoggerForClass();

	// Container endWindow;
	// JPopupMenu pop;
	private TreePath currentPath;

	private ActionListener actionHandler;

	private ReportTreeModel model;

	private JTree tree;

	private boolean dragging = false;

	private ReportTreeNode[] draggedNodes;

	private JLabel dragIcon = new JLabel(JMeterUtils.getImage("leafnode.gif"));

	/**
	 * Constructor for the JMeterTreeListener object.
	 */
	public ReportTreeListener(ReportTreeModel model) {
		this.model = model;
		dragIcon.validate();
		dragIcon.setVisible(true);
	}

	public ReportTreeListener() {
		dragIcon.validate();
		dragIcon.setVisible(true);
	}

	public void setModel(ReportTreeModel m) {
		model = m;
	}

	/**
	 * Sets the ActionHandler attribute of the JMeterTreeListener object.
	 * 
	 * @param ah
	 *            the new ActionHandler value
	 */
	public void setActionHandler(ActionListener ah) {
		actionHandler = ah;
	}

	/**
	 * Sets the JTree attribute of the JMeterTreeListener object.
	 * 
	 * @param tree
	 *            the new JTree value
	 */
	public void setJTree(JTree tree) {
		this.tree = tree;
	}

	/**
	 * Sets the EndWindow attribute of the JMeterTreeListener object.
	 * 
	 * @param window
	 *            the new EndWindow value
	 */
	public void setEndWindow(Container window) {
		// endWindow = window;
	}

	/**
	 * Gets the JTree attribute of the JMeterTreeListener object.
	 * 
	 * @return tree the current JTree value.
	 */
	public JTree getJTree() {
		return tree;
	}

	/**
	 * Gets the CurrentNode attribute of the JMeterTreeListener object.
	 * 
	 * @return the CurrentNode value
	 */
	public ReportTreeNode getCurrentNode() {
		if (currentPath != null) {
			if (currentPath.getLastPathComponent() != null) {
				return (ReportTreeNode) currentPath.getLastPathComponent();
			} else {
				return (ReportTreeNode) currentPath.getParentPath().getLastPathComponent();
			}
		} else {
			return (ReportTreeNode) model.getRoot();
		}
	}

	public ReportTreeNode[] getSelectedNodes() {
		TreePath[] paths = tree.getSelectionPaths();
		if (paths == null) {
			return new ReportTreeNode[] { getCurrentNode() };
		}
		ReportTreeNode[] nodes = new ReportTreeNode[paths.length];
		for (int i = 0; i < paths.length; i++) {
			nodes[i] = (ReportTreeNode) paths[i].getLastPathComponent();
		}

		return nodes;
	}

	public TreePath removedSelectedNode() {
		currentPath = currentPath.getParentPath();
		return currentPath;
	}

	public void valueChanged(TreeSelectionEvent e) {
		log.debug("value changed, updating currentPath");
		currentPath = e.getNewLeadSelectionPath();
		actionHandler.actionPerformed(new ActionEvent(this, 3333, "edit"));
	}

	public void mouseClicked(MouseEvent ev) {
	}

	public void mouseReleased(MouseEvent e) {
		if (dragging && isValidDragAction(draggedNodes, getCurrentNode())) {
			dragging = false;
			JPopupMenu dragNdrop = new JPopupMenu();
			JMenuItem item = new JMenuItem(JMeterUtils.getResString("Insert Before"));
			item.addActionListener(actionHandler);
			item.setActionCommand(ReportDragNDrop.INSERT_BEFORE);
			dragNdrop.add(item);
			item = new JMenuItem(JMeterUtils.getResString("Insert After"));
			item.addActionListener(actionHandler);
			item.setActionCommand(ReportDragNDrop.INSERT_AFTER);
			dragNdrop.add(item);
			item = new JMenuItem(JMeterUtils.getResString("Add as Child"));
			item.addActionListener(actionHandler);
			item.setActionCommand(ReportDragNDrop.ADD);
			dragNdrop.add(item);
			dragNdrop.addSeparator();
			item = new JMenuItem(JMeterUtils.getResString("Cancel"));
			dragNdrop.add(item);
			displayPopUp(e, dragNdrop);
		} else {
			ReportGuiPackage.getInstance().getMainFrame().repaint();
		}
		dragging = false;
	}

	public ReportTreeNode[] getDraggedNodes() {
		return draggedNodes;
	}

	/**
	 * Tests if the node is being dragged into one of it's own sub-nodes, or
	 * into itself.
	 */
	private boolean isValidDragAction(ReportTreeNode[] source, ReportTreeNode dest) {
		boolean isValid = true;
		TreeNode[] path = dest.getPath();
		for (int i = 0; i < path.length; i++) {
			if (contains(source, path[i])) {
				isValid = false;
			}
		}
		return isValid;
	}

	public void mouseEntered(MouseEvent e) {
	}

	private void changeSelectionIfDragging(MouseEvent e) {
		if (dragging) {
			ReportGuiPackage.getInstance().getMainFrame().drawDraggedComponent(dragIcon, e.getX(), e.getY());
			if (tree.getPathForLocation(e.getX(), e.getY()) != null) {
				currentPath = tree.getPathForLocation(e.getX(), e.getY());
				if (!contains(draggedNodes, getCurrentNode())) {
					tree.setSelectionPath(currentPath);
				}
			}
		}
	}

	private boolean contains(Object[] container, Object item) {
		for (int i = 0; i < container.length; i++) {
			if (container[i] == item) {
				return true;
			}
		}
		return false;
	}

	public void mousePressed(MouseEvent e) {
		// Get the Main Frame.
		ReportMainFrame mainFrame = ReportGuiPackage.getInstance().getMainFrame();
		// Close any Main Menu that is open
		mainFrame.closeMenu();
		int selRow = tree.getRowForLocation(e.getX(), e.getY());
		if (tree.getPathForLocation(e.getX(), e.getY()) != null) {
			log.debug("mouse pressed, updating currentPath");
			currentPath = tree.getPathForLocation(e.getX(), e.getY());
		}
		if (selRow != -1) {
			// updateMainMenu(((JMeterGUIComponent)
			// getCurrentNode().getUserObject()).createPopupMenu());
			if (isRightClick(e)) {
				if (tree.getSelectionCount() < 2) {
					tree.setSelectionPath(currentPath);
				}
				if (getCurrentNode() instanceof ReportTreeNode) {
					log.debug("About to display pop-up");
					displayPopUp(e);
				}
			}
		}
	}

	public void mouseDragged(MouseEvent e) {
		if (!dragging) {
			dragging = true;
			draggedNodes = getSelectedNodes();
			if (draggedNodes[0].getUserObject() instanceof ReportGui) {
				dragging = false;
			}

		}
		changeSelectionIfDragging(e);
	}

	public void mouseMoved(MouseEvent e) {
	}

	public void mouseExited(MouseEvent ev) {
	}

	public void keyPressed(KeyEvent e) {
	}

	public void keyReleased(KeyEvent e) {
	}

	public void keyTyped(KeyEvent e) {
	}

	private boolean isRightClick(MouseEvent e) {
		return (MouseEvent.BUTTON2_MASK & e.getModifiers()) > 0 || (MouseEvent.BUTTON3_MASK == e.getModifiers());
	}

	/*
	 * NOTUSED private void updateMainMenu(JPopupMenu menu) { try { MainFrame
	 * mainFrame = GuiPackage.getInstance().getMainFrame();
	 * mainFrame.setEditMenu(menu); } catch (NullPointerException e) {
	 * log.error("Null pointer: JMeterTreeListener.updateMenuItem()", e);
	 * log.error("", e); } }
	 */

	private void displayPopUp(MouseEvent e) {
		JPopupMenu pop = getCurrentNode().createPopupMenu();
		ReportGuiPackage.getInstance().displayPopUp(e, pop);
	}

	private void displayPopUp(MouseEvent e, JPopupMenu popup) {
		log.warn("Shouldn't be here");
		if (popup != null) {
			popup.pack();
			popup.show(tree, e.getX(), e.getY());
			popup.setVisible(true);
			popup.requestFocus();
		}
	}
}
