package com.ckrocket.util;

import java.util.Random;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Image;
import java.io.DataInputStream;

public abstract class TouchCanvas extends Canvas {

    public boolean mousePressed;
    public int dragMouseX, dragMouseY, presMouseX, presMouseY, relMouseX, relMouseY;
    public int presKeyCode, dragKeyCode, relKeyCode;
    public boolean pressKey;
    public long FPS, FPS_Count, FPS_Start;

    public void keyPressed(int keyCode){
     presKeyCode = keyCode;
     pressKey = true;
     sleep(100);
    }

    public void keyDragged(int keyCode){
     dragKeyCode = keyCode;
    }

    public void keyReleased(int keyCode){
     pressKey = false;
     presKeyCode = 0;
    }

    public void pointerPressed(int x, int y) {
        mousePressed = true;
        presMouseX = x;
        presMouseY = y;
    }

    public void pointerDragged(int x, int y) {
        dragMouseX = x;
        dragMouseY = y;
    }

    public void pointerReleased(int x, int y) {
        mousePressed = false;
        relMouseX = x;
        relMouseY = y;
    }

   public String readText(String path) {
        DataInputStream dis = new DataInputStream(getClass().getResourceAsStream(path));
        StringBuffer strBuff = new StringBuffer();
        int ch = 0;
        try {
            while ((ch = dis.read()) != -1) {
                strBuff.append((char ) ch);
            }
            dis.close();
        } catch (Exception e) {
            System.err.println("ERROR in readText() " + e);
        }
        return strBuff.toString();
   } 

    public Image resize(Image img, int newWidth, int newHeight) {
        int imageWidth = img.getWidth();
        int imageHeight = img.getHeight();
        int[] arrayOld = new int[imageWidth * imageHeight];
        int[] arrayNew = new int[newWidth * newHeight];
        img.getRGB(arrayOld, 0, imageWidth, 0, 0, imageWidth, imageHeight);
        for (int y = 0; y < newHeight; y++) {
            for (int x = 0; x < newWidth; x++) {
                arrayNew[x + newWidth * y] = arrayOld[x * imageWidth / newWidth + imageWidth * (y * imageHeight / newHeight)];
            }
        }
        return Image.createRGBImage(arrayNew, newWidth, newHeight, true);
    }

    public int dist(int x1, int y1, int x2, int y2) {
        int dist = (int) (Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)));
        return dist;
    }

    public String getFPS() {
        FPS_Count++;
        if (FPS_Start == 0) {
            FPS_Start = System.currentTimeMillis();
        }
        if (System.currentTimeMillis() - FPS_Start >= 1000) {
            FPS = FPS_Count;
            FPS_Count = 0;
            FPS_Start = System.currentTimeMillis();
        }
        return Long.toString(FPS);
    }

    public boolean pointCross(int x1, int x2, int x3, int x4, int y1, int y2, int y3, int y4) {
        int x = crossPointX(x1, x2, x3, x4, y1, y2, y3, y4);
        int y = crossPointY(x1, x2, x3, x4, y1, y2, y3, y4);
        boolean point =
                x1 <= x && x2 >= x && x3 <= x && x4 >= x
                && y1 <= y && y2 >= y && y3 <= y && y4 >= y;
        return point;
    }

    public int crossPointX(int x1, int x2, int x3, int x4, int y1, int y2, int y3, int y4) {
        int x = (int) (0 - ((x1 * y2 - x2 * y1) * (x4 - x3) - (x3 * y4 - x4 * y3) * (x2 - x1)) / ((y1 - y2) * (x4 - x3) - (y3 - y4) * (x2 - x1)));
        return x;
    }

    public int crossPointY(int x1, int x2, int x3, int x4, int y1, int y2, int y3, int y4) {
        int x = crossPointX(x1, x2, x3, x4, y1, y2, y3, y4);
        int y = (int) (((y3 - y4) * x - (x3 * y4 - x4 * y3)) / (x4 - x3));
        return y;
    }

    public static int random(int min, int max, int dim) {
      return min + new Random().nextInt((int)((max-min)/dim)) * dim;
    }

    public int randomSmooth(int a, int b) {
        Random r = new Random();
        return a + ((r.nextInt() >>> 1) % (b - a));
    }

    public void sleep(long sleep) {
        try {
            Thread.sleep(sleep);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void repaints() {
        super.repaint();
        sleep(40L);
    }
}