// CSE 143, Homework 1, Rectangle-Rama
// This provided main program uses your RectangleManager class.
// It display a DrawingPanel, creates several random Rectangle objects,
// and adds them to your manager.  It also listens for mouse clicks, notifying
// your rectangle manager when the mouse buttons are pressed.

// A left-click raises a rectangle to the top of the Z-order.
// A Shift-left-click lowers a rectangle to the bottom of the Z-order.
// A right-click (or a Ctrl-left-click for Mac people) deletes a rectangle.
// A Shift-right-click (or a Shift-Ctrl-left-click for Mac people) deletes 
// all rectangles touching the mouse point.

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;

public class RectangleMain {
    // constants for the drawing panel size, rectangle sizes, and # of rects
    public static final int WIDTH = 300;
    public static final int HEIGHT = 300;
    public static final int MIN_SIZE = 20;
    public static final int MAX_SIZE = 100;
    public static final int RECTANGLES = 20;
    
    public static void main(String[] args) {
        DrawingPanel panel = new DrawingPanel(WIDTH, HEIGHT);
        Graphics g = panel.getGraphics();
        
        // create several random rectangles and put them into a manager
        RectangleManager list = new RectangleManager();
        for (int i = 0; i < RECTANGLES; i++) {
            // choose random coordinates
            Random rand = new Random();
            int w = rand.nextInt(MAX_SIZE - MIN_SIZE + 1) + MIN_SIZE;
            int h = rand.nextInt(MAX_SIZE - MIN_SIZE + 1) + MIN_SIZE;
            int x = rand.nextInt(WIDTH - w);
            int y = rand.nextInt(HEIGHT - h);
            
            // choose random color
            int red = rand.nextInt(256);
            int green = rand.nextInt(256);
            int blue = rand.nextInt(256);
            Color color = new Color(red, green, blue);
            
            // add random rectangle to list
            Rectangle rect = new Rectangle(x, y, w, h, color);
            list.addRectangle(rect);
        }
        
        list.drawAll(g);
        
        // listen for mouse clicks
        RectangleMouseListener listener = new RectangleMouseListener(panel, list);
        panel.addMouseListener(listener);
    }
    
    // A class for responding to mouse clicks on the drawing panel.
    public static class RectangleMouseListener extends MouseInputAdapter {
        private DrawingPanel panel;
        private RectangleManager list;
        
        public RectangleMouseListener(DrawingPanel panel, RectangleManager list) {
            this.panel = panel;
            this.list = list;
        }
        
        public void mousePressed(MouseEvent event) {
            int x = event.getX();
            int y = event.getY();
            if (event.isControlDown() || SwingUtilities.isRightMouseButton(event)) {
                // treat right-clicks and control-left-clicks as the same (for Mac users)
                if (event.isShiftDown()) {
                    list.deleteAll(x, y);
                } else {
                    list.delete(x, y);
                }
            } else {
                if (event.isShiftDown()) {
                    list.lower(x, y);
                } else {
                    list.raise(x, y);
                }
            }
                
            // repaint all of the rectangles
            panel.clear();
            Graphics g = panel.getGraphics();
            list.drawAll(g);
        }
    }
}