/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Graphics;
public class SpellCanvas extends Canvas implements Runnable {
    private final int PUZZLE_STATE = 0;
    private final int IMAGE_STATE = 1;
    private final int FINISH_STATE = 2;
    private final int PUZZLE_MOVE = 3;
    private final int xCell = 30;
    private final int yCell = 29;
    private int state;
    public Graphics g;
    public Image[] img = new Image[9];
    public int[][] current = new int[3][3];
    public int steps;
    public int hiddenX;
    public int hiddenY;
    public int LCD_WIDTH;
    public int LCD_HEIGHT;
    public int midWidth;
    public int midHeight;
    public int cur;
    Thread t;

    public final int K_CLR = -7;
    public final int K_MENU = -6;

    public final int K_LEFT = -3;
    public final int K_RIGHT = -4;
    public final int K_UP = -1;
    public final int K_DOWN = -2;
    public final int K_SELECT = -5;


    public SpellCanvas() {
        LCD_WIDTH=this.getWidth();
        LCD_HEIGHT=this.getHeight();
        midWidth=LCD_WIDTH/2;
        midHeight=LCD_HEIGHT/2;
        this.state = 0;
        hiddenX=2;
        hiddenY=2;
        cur=8;
        current = new int[][] {
                  {2, 7, 5},
                  {1, 0, 6},
                  {4, 3, 8}
        };
        createImg();
        t=new Thread(this);
        t.start();
    }

    public void createImg(){
        try{
            for (int i = 0;i <= 8; i++ ) {
                img[i]=Image.createImage("/pic/"+Integer.toString(i)+".PNG");
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
    public void drawPuzzle(Graphics g){

        g.setColor(255, 255, 255);
        g.fillRect(0, 0, LCD_WIDTH, LCD_HEIGHT);
        g.setColor(0,0,255);
        g.fillRect((LCD_WIDTH - 90) / 2 -2,(LCD_HEIGHT - 87) / 2 -2,90+6,87+6);
        for (int i = 0; i <= 2; i++) {
            for (int j = 0; j <= 2; j++) {
                if(!(i==hiddenX&&j==hiddenY)){
                    g.drawImage(img[current[i][j]],
                                (LCD_WIDTH - 90) / 2 + 31 * j,
                                (LCD_HEIGHT - 87) / 2 + 30 * i,
                                Graphics.TOP | Graphics.LEFT);
                }else{
                    g.setColor(0,0,0);
                    g.fillRect((LCD_WIDTH - 90) / 2 + 31 * hiddenY,
                                (LCD_HEIGHT - 87) / 2 + 30 * hiddenX,30,29);
                }
            }
        }
        g.setColor(0,0,0);
        g.drawString("steps :"+steps,midWidth,2,Graphics.TOP|Graphics.HCENTER);
        g.drawString("按星號鍵查看完整圖片",midWidth,140,Graphics.TOP|Graphics.HCENTER);
    }

    public void drawWhole(Graphics g){
        g.setColor(255, 255, 255);
        g.fillRect(0, 0, LCD_WIDTH, LCD_HEIGHT);
        g.setColor(0,0,255);
        g.fillRect((LCD_WIDTH - 90) / 2 -2,(LCD_HEIGHT - 87) / 2 -2,90+6,87+6);
        for (int i = 0; i <= 2; i++) {
            for (int j = 0; j <= 2; j++) {
                g.drawImage(img[3 * i + j], (LCD_WIDTH - 90) / 2 + 31 * j,
                            (LCD_HEIGHT - 87) / 2 + 30 * i,
                            Graphics.TOP | Graphics.LEFT);
            }
        }
        g.drawString("按星號鍵返回",midWidth,140,Graphics.TOP|Graphics.HCENTER);
    }

    public void drawFinish(Graphics g){
        g.setColor(0,0,0);
        g.fillRect(0,0,LCD_WIDTH,LCD_HEIGHT);
        g.setColor(191,191,191);
        g.fillRect(midWidth-40,midHeight-10,80,20);
        g.setColor(255,255,255);
        g.drawString("Congratulations!",midWidth,midHeight,Graphics.VCENTER|Graphics.HCENTER);
    }

    public void drawSelect(int cur){
        g.setColor(255,0,0);
        g.drawRect((LCD_WIDTH-90)/2-1+(cur%3)*31,(LCD_HEIGHT-87)/2-1+(cur/3)*30,31,30);
    }

    public void drawMove(int cur){
        if(hiddenX==cur/3&&hiddenY==cur%3){
            return;
        }
        if((cur/3-1==hiddenX&&cur%3==hiddenY)||(cur/3+1==hiddenX&&cur%3==hiddenY)||(cur/3==hiddenX&&cur%3-1==hiddenY)||(cur/3==hiddenX&&cur%3+1==hiddenY)){
            current[hiddenX][hiddenY] = current[cur / 3][cur % 3];
            hiddenX = cur / 3;
            hiddenY = cur % 3;
            steps++;
        }
    }

    protected void paint(Graphics g) {
        this.g=g;
        switch(state){
        case PUZZLE_STATE:
            drawPuzzle(g);
            drawSelect(cur);
            break;
        case PUZZLE_MOVE:
            drawPuzzle(g);
            drawSelect(cur);
            break;
        case IMAGE_STATE:
            drawWhole(g);
            break;
        case FINISH_STATE:
            drawWhole(g);
            drawFinish(g);
            break;
        }
    }
    public void keyPressed(int key){
        switch (state) {
        case PUZZLE_STATE:
            switch (key) {
            case Canvas.KEY_STAR:
                state = 1;
                break;
            case K_DOWN:
            case Canvas.KEY_NUM8:
                if(!(cur+3>8)){
                    cur += 3;
                }
                break;
            case K_UP:
            case Canvas.KEY_NUM2:
                if(!(cur-3<0)){
                    cur -= 3;
                }
                break;
            case K_LEFT:
            case Canvas.KEY_NUM4:
                if(cur-1<0){
                    cur  =1;
                }
                cur-=1;
                break;
            case K_RIGHT:
            case Canvas.KEY_NUM6:
                if(cur+1>8){
                    cur=7;
                }
                cur+=1;
                break;
            case K_SELECT:
                if (current[0][0] == 0 && current[0][1] == 1 &&
                    current[0][2] == 2 && current[1][0] == 3 &&
                    current[1][1] == 4 && current[1][2] == 5 &&
                    current[2][0] == 6 && current[2][1] == 7 &&
                    current[2][2] == 8) {
                    state = FINISH_STATE;
                    break;
                }else{
                    state = PUZZLE_MOVE;
                    break;
                }
            }
            break;
        case IMAGE_STATE:
            switch(key){
            case Canvas.KEY_STAR:
            case K_SELECT:
                state = 0;
                break;
            }
            break;
        case PUZZLE_MOVE:
            switch (key) {
            case Canvas.KEY_STAR:
                state = 1;
                break;
            case K_UP:
            case Canvas.KEY_NUM2:
                    drawMove(cur);
                state=0;
                break;
            case K_DOWN:
            case Canvas.KEY_NUM8:
                    drawMove(cur);
                state=0;
                break;
            case K_LEFT:
            case Canvas.KEY_NUM4:
                    drawMove(cur);
                state=0;
                break;
            case K_RIGHT:
            case Canvas.KEY_NUM6:
                    drawMove(cur);
                state=0;
                break;
            }
            break;
        }
    }

    public void run(){
        while(true){
            repaint();
            serviceRepaints();
            try{
                Thread.sleep(100);
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }
}