package view;

import model.map.Cell;

import model.map.Map;

import javax.swing.*;

import java.awt.*;

import java.util.function.Supplier;

/**

* Created by Hadi on 2/3/2015 9:41 AM.

*/

public class MapView extends JPanel {

public static int SIZE_MIN = 7, SIZE_MAX = 70;

public static int DEFAULT_SIZE = 20, DEFAULT_OFF_X = -10, DEFAULT_OFF_Y = -10;

private Supplier<Map> mMapProvider;

private int mSize = DEFAULT_SIZE, mOffX = DEFAULT_OFF_X, mOffY = DEFAULT_OFF_Y;

public MapView(Supplier<Map> mapProvider) {

mMapProvider = mapProvider;

}

public void zoom(Point origin, double amount) {

double cx = origin.getX(), cy = origin.getY();

int newSize = (int) Math.round(mSize * Math.exp(-amount / 10));

newSize = Math.max(newSize, SIZE_MIN);

newSize = Math.min(newSize, SIZE_MAX);

double c = (double)newSize/ mSize;

mOffX = (int) (c*(mOffX + cx) - cx);

mOffY = (int) (c*(mOffY + cy) - cy);

mSize = newSize;

repaint();

}

public void translate(int offX, int offY) {

mOffX -= offX;

mOffY -= offY;

}

public void resetView() {

mSize = DEFAULT_SIZE;

mOffX = DEFAULT_OFF_X;

mOffY = DEFAULT_OFF_Y;

repaint();

}

public void setMapProvider(Supplier<Map> mapProvider) {

mMapProvider = mapProvider;

repaint();

}

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

Rectangle b = g.getClip().getBounds();

g.setColor(Color.WHITE);

g.fillRect(b.x, b.y, b.width, b.height);

if (mMapProvider == null)

return;

Map map = mMapProvider.get();

int h = map.getHeight(), w = map.getWidth();

g.translate(-mOffX, -mOffY);

for (int i = 0; i < h; i++) {

for (int j = 0; j < w; j++) {

map.at(j, i).paint(g, mSize);

g.translate(mSize, 0);

}

g.translate(-w* mSize, mSize);

}

g.translate(0, -h* mSize);

g.translate(mOffX, mOffY);

}

public Point getMapPoint(Point mousePoint) {

return new Point((mousePoint.x + mOffX)/ mSize, (mousePoint.y + mOffY)/ mSize);

}

}