package net.newbiehacker.nengine.mapeditor;

import javax.swing.*;
import javax.swing.border.LineBorder;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

/**
 * @author newbiehacker
 */
public class ToolWindow extends JWindow implements MouseListener, MouseMotionListener {
    private static enum DragMode {
        TOP, BOTTOM, RIGHT, LEFT
    }

    private static final int BORDER_WIDTH = 3;
    private int startX = -1, startY = -1, lastX = -1, lastY = -1;
    private DragMode dragMode;

    public ToolWindow(JFrame owner, String title, Component inside) {
        super(owner);
        final Color bg = new Color(102, 153, 255);
        ((JPanel) getContentPane()).setBorder(new LineBorder(bg, BORDER_WIDTH));
        JLabel t = new JLabel(title, JLabel.CENTER);
        getContentPane().setBackground(bg);
        t.setFont(t.getFont().deriveFont(Font.BOLD, 12));
        add(t, BorderLayout.NORTH);
        add(inside, BorderLayout.CENTER);
        addMouseListener(this);
        addMouseMotionListener(this);
        addMouseHandler(inside);
        setAlwaysOnTop(true);
        pack();
    }

    private void addMouseHandler(Component c) {
        c.addMouseMotionListener(this);
        if (c instanceof Container) {
            Container cont = (Container) c;
            for (Component c1 : cont.getComponents()) {
                addMouseHandler(c1);
            }
        }
    }

    public void mouseClicked(MouseEvent e) {
    }

    public void mousePressed(MouseEvent e) {
        Point mouse = e.getPoint();
        lastX = startX = mouse.x;
        lastY = startY = mouse.y;
        if (startX <= BORDER_WIDTH)
            dragMode = DragMode.LEFT;
        else if (startX >= getWidth() - BORDER_WIDTH)
            dragMode = DragMode.RIGHT;
        else if (startY <= BORDER_WIDTH)
            dragMode = DragMode.TOP;
        else if (startY >= getHeight() - BORDER_WIDTH)
            dragMode = DragMode.BOTTOM;
    }

    public void mouseReleased(MouseEvent e) {
        startX = startY = -1;
        dragMode = null;
    }

    public void mouseEntered(MouseEvent e) {
    }

    public void mouseExited(MouseEvent e) {
    }

    public void mouseDragged(MouseEvent e) {
        if (e.getSource() == this) {
            Point mouse = e.getPoint();
            Point p = getLocation();
            if(dragMode == null || dragMode == DragMode.LEFT || dragMode == DragMode.TOP)
                setLocation(p.x + mouse.x - startX, p.y + mouse.y - startY);
            if(dragMode == DragMode.LEFT)
                setSize(getWidth() + startX - mouse.x, getHeight());
            else if(dragMode == DragMode.RIGHT)
                setSize(getWidth() + mouse.x - lastX, getHeight());
            else if(dragMode == DragMode.TOP)
                setSize(getWidth(), getHeight() + startY - mouse.y);
            else if(dragMode == DragMode.BOTTOM)
                setSize(getWidth(), getHeight() + mouse.y - lastY);
            lastX = mouse.x;
            lastY = mouse.y;
        }
    }

    public void mouseMoved(MouseEvent e) {
        Point mouse = e.getLocationOnScreen();
        Point us = getLocationOnScreen();
        startX = e.getX();
        startY = e.getY();
        if (mouse.x <= us.x + BORDER_WIDTH)
            dragMode = DragMode.LEFT;
        else if (mouse.x >= us.x + getWidth() - BORDER_WIDTH)
            dragMode = DragMode.RIGHT;
        else if (mouse.y <= us.y + BORDER_WIDTH)
            dragMode = DragMode.TOP;
        else if (mouse.y >= us.y + getHeight() - BORDER_WIDTH)
            dragMode = DragMode.BOTTOM;
        else {
            dragMode = null;
            setCursor(Cursor.getDefaultCursor());
        }
        if (dragMode != null) {
            Cursor c = Cursor.getDefaultCursor();
            if (dragMode == DragMode.LEFT)
                c = new Cursor(Cursor.W_RESIZE_CURSOR);
            else if (dragMode == DragMode.RIGHT)
                c = new Cursor(Cursor.E_RESIZE_CURSOR);
            else if (dragMode == DragMode.TOP)
                c = new Cursor(Cursor.N_RESIZE_CURSOR);
            else if (dragMode == DragMode.BOTTOM)
                c = new Cursor(Cursor.S_RESIZE_CURSOR);
            setCursor(c);
        }
    }
}