/*
 *  JFLAP - Formal Languages and Automata Package
 * 
 * 
 *  Susan H. Rodger
 *  Computer Science Department
 *  Duke University
 *  August 27, 2009

 *  Copyright (c) 2002-2009
 *  All rights reserved.

 *  JFLAP is open source software. Please see the LICENSE for terms.
 *
 */




package automata;

import gui.editor.DeleteTool;
import gui.editor.EditCanvas;
import gui.editor.EditorPane;
import gui.editor.Tool;
import gui.viewer.AutomatonPane;
import gui.environment.AutomatonEnvironment;

import java.awt.Color;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import debug.EDebug;

import javax.swing.JTextArea;

/**
 * A class that represents notes on the JFLAP canvas.
 */
public class Note extends JTextArea{
	private Point myAutoPoint = null;
	public boolean moving = false;
	protected Point initialPointState;
	protected Point initialPointClick;
	protected AutomatonPane myView;
	public Point myViewPoint = new Point(0,0);
	public Note(Point p, String message){
		setLocationManually(p);
		this.setText(message);
	}
	
	/**
	 * Creates an instance of <CODE>Note</CODE> with a specified message.
	 */
	public Note(String message){
		this.setText(message);
	}
	
	public Note(Point point) {
		setLocationManually(point);
	}
	
    /*
       For the undo part of cloning, we need a way to store the view without becoming visible / active.
     */
    public void setView(AutomatonPane view){
        myView = view;
    }

	/**
	 * Initializes the note with relevant properties.
	 */
	public void initializeForView(AutomatonPane view){
		myView = view;
		setLocationManually(myAutoPoint);
        this.setDisabledTextColor(Color.BLACK);
		this.setBackground(new Color(255, 255, 150));
		this.addMouseMotionListener(new MouseMotionListener(){
			public void mouseDragged(MouseEvent e) {
				if (e.isPopupTrigger())
					return;
				if(!((Note)e.getSource()).isEditable()){					
					int diffX = e.getPoint().x - initialPointClick.x; 
					int diffY = e.getPoint().y - initialPointClick.y;

					int nowAtX = initialPointState.x+ diffX;
					int nowAtY =  initialPointState.y +diffY;
					((Note)e.getSource()).setLocationManually(new Point(nowAtX, nowAtY));
					initialPointState = new Point(((Note)e.getSource()).getAutoPoint());
				}
				else {
					//do normal select functionality
				}
				myView.repaint();
			}
			public void mouseMoved(MouseEvent e) {
				// TODO Auto-generated method stub
				
			}				
		});
		this.addMouseListener(new MouseListener(){

			public void mouseClicked(MouseEvent e) {
                if (myView.getDrawer().getAutomaton().getEnvironmentFrame() !=null)
                    ((AutomatonEnvironment)myView.getDrawer().getAutomaton().getEnvironmentFrame().getEnvironment()).saveStatus();
				((Note)e.getComponent()).setEnabled(true);
				((Note)e.getComponent()).setEditable(true);
				((Note)e.getComponent()).setCaretColor(null);
			}

			public void mousePressed(MouseEvent e) {
                if (myView.getDrawer().getAutomaton().getEnvironmentFrame() !=null){
                    ((AutomatonEnvironment)myView.getDrawer().getAutomaton().getEnvironmentFrame().getEnvironment()).saveStatus();
                    ((AutomatonEnvironment)myView.getDrawer().getAutomaton().getEnvironmentFrame().getEnvironment()).setDirty();
                }

				initialPointState = new Point(((Note)e.getSource()).getAutoPoint());
				initialPointClick = new Point(e.getPoint().x, e.getPoint().y);
				
				//delete the text box
				EditorPane pane = myView.getCreator();
				Tool curTool = pane.getToolBar().getCurrentTool();
				if(curTool instanceof DeleteTool){
					myView.remove((Note)e.getSource());
					myView.getDrawer().getAutomaton().deleteNote((Note)e.getSource());
					myView.repaint();
				}
				
			}


			public void mouseReleased(MouseEvent e) {
				// TODO Auto-generated method stub
				
			}

			public void mouseEntered(MouseEvent e) {
				// TODO Auto-generated method stub
				
			}

			public void mouseExited(MouseEvent e) {
				// TODO Auto-generated method stub
				
			}
			
		});
        myView.add(this);
		setEnabled(true);
		setEditable(true);
		setCaretColor(null);
		this.setSelectionStart(0);
		this.setSelectionEnd(this.getColumnWidth());
		this.requestFocus();
	}

	public Point getAutoPoint(){
		return myAutoPoint;
	}
	
	/**
	 * Gets the AutomatonPane that the Note belongs to.
	 * @return the AutomatonPane that the Note belongs to.
	 */
    public AutomatonPane getView(){
        return myView;
    }

    /**
     * Sets the Note manually to a specified Point.
     * @param point 
     */
	public void setLocationManually(Point point) {
		moving = true;
		myAutoPoint = point;
		if(myView != null){
			setLocation(myView.transformFromAutomatonToView(point));	
		}
	}
	
	public void setLocation(Point p){
		if(moving){		
			if(myView!=null){
				myViewPoint = p;
				super.setLocation(p);
			}
		}
	}
	
	public void setLocation(int x, int y){
		if(moving){
			super.setLocation(x, y);
		}
		moving = false;
	}


	public void updateView() {
		setLocationManually(myAutoPoint);
		
	}
	
	public int specialHash(){
//        EDebug.print(myAutoPoint.hashCode() + getText().hashCode());
        return myAutoPoint == null? -1 : myAutoPoint.hashCode() + this.getText().hashCode();
	}


	
	
}