import java.io.*;
import java.util.Enumeration;
import java.util.Random;
import java.util.Vector;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;
import com.nttdocomo.io.ConnectionException;
import com.nttdocomo.io.HttpConnection;
import com.nttdocomo.ui.*;

class FrogClimberCanvas extends Canvas
{
	public final static int ID_TIMER=0;
	public final static int BALL_LENGTH=16;

	private static Random random=new Random();

	private Image[] frog;
	private int frogX,frogY,frogVx,frogVy,pose;
	private Image ball;
	private int[] ballX,ballY;

	private ShortTimer timer;
	private int scroll,hiscore,rank;
	private boolean checkRank;

	private Vector media;

	// 初期化

	public FrogClimberCanvas()
	{
		setSoftLabel(Panel.SOFT_KEY_1,"終了");
		
		init();
	}

	private void init()
	{
		media=new Vector();
		
		frog=new Image[3];
		for (int i=0;i<=frog.length-1;i++)
		{
			frog[i]=loadImage("/frog"+(1+i)+".gif");
		}
		ball=loadImage("/ball.gif");
		ballX=new int[BALL_LENGTH];
		ballY=new int[BALL_LENGTH];
		
		load();
		
		PhoneSystem.setAttribute(
		    PhoneSystem.DEV_BACKLIGHT,PhoneSystem.ATTR_BACKLIGHT_ON);
	}

	private Image loadImage(String file)
	{
		MediaImage mediaImage;
	
		mediaImage=MediaManager.getImage("resource://"+file);
		media.addElement(mediaImage);
		try {
			mediaImage.use();
		}
		catch (ConnectionException e)
		{
			e.printStackTrace();
		}
		return mediaImage.getImage();
	}

	private void reset()
	{
		frogX=getWidth()/2-frog[0].getWidth()/2;
		frogY=0;
		frogVx=0;
		frogVy=0;
		for (int i=0;i<=BALL_LENGTH-1;i++)
		{
			ballX[i]=(getWidth()/2)*(i%2)+
			    Math.abs(random.nextInt())%(getWidth()/2-frog[0].getWidth());
			ballY[i]=Math.abs(i*32+random.nextInt()%12);
		}
		
		scroll=0;
		rank=0;
		checkRank=false;
	}

	// 開始

	public void start()
	{
		reset();
		
		timer=ShortTimer.getShortTimer(this,ID_TIMER,1000/7,true);
		timer.start();
	}

	// メイン

	public void mainLoop()
	{
		if ((getKeypadState() & (1<<Display.KEY_LEFT  ))!=0)
		{
			frogVx=Math.max(frogVx-1,-5);
			pose=(pose+1)%2;
		}
		if ((getKeypadState() & (1<<Display.KEY_RIGHT ))!=0)
		{
			frogVx=Math.min(frogVx+1, 5);
			pose=(pose+1)%2;
		}
		if ((getKeypadState() & (1<<Display.KEY_UP    ))!=0 ||
		    (getKeypadState() & (1<<Display.KEY_SELECT))!=0)
		{
			if (frogY+frogVy==0)
			{
				frogVy=12;
			}
		}
		
		for (int i=0;i<=BALL_LENGTH-1;i++)
		{
			if (Math.abs(ballX[i]-(frogX+frogVx))<frog[0].getWidth () &&
			    Math.abs(ballY[i]-(frogY+frogVy))%(32*BALL_LENGTH)<frog[0].getHeight())
			{
				frogVy=-frogVy;
				if (frogVy>0)
				{
					frogVy=frogVy*2+Math.abs(random.nextInt())%2;
				}
				if (Math.abs(ballX[i]-(frogX+frogVx))<frog[0].getWidth () &&
				    Math.abs(ballY[i]-(frogY+frogVy))%(32*BALL_LENGTH)<frog[0].getHeight())
				{
					frogVx=-frogVx;
				}
			}
		}
		
		if (frogX+frogVx<0)
		{
			frogVx=(0-frogX);
		}
		else if (frogX+frogVx>getWidth()-frog[0].getWidth())
		{
			frogVx=(getWidth()-frog[0].getWidth()-frogX);
		}
		frogVy=frogVy-1;
		frogVy=Math.max(frogVy,-frog[0].getHeight());
		frogVy=Math.min(frogVy, frog[0].getHeight());
		if (frogY+frogVy<0)
		{
			frogVy=(0-frogY);
		}
		if (frogVy>0)
		{
			pose=2;
		}
		frogX+=frogVx;
		frogY+=frogVy;
		
		scroll=scroll+(frogY-(getHeight()/2-frog[0].getHeight()/2)-scroll)/4;
		scroll=Math.max(scroll,0);
		
		if (checkRank)
		{
			checkRank();
			checkRank=false;
		}
		
		if (rank==0)
		{
			hiscore=Math.max(hiscore,scroll);
			setSoftLabel(Panel.SOFT_KEY_2,""+hiscore);
		}
		else
		{
			setSoftLabel(Panel.SOFT_KEY_2,rank+"位");
		}
	}

	// 描画処理

	public void paint(Graphics g)
	{
		int y;
	
		g.lock();
		g.setColor(Graphics.getColorOfRGB(0,0,64));
		g.fillRect(0,0,getWidth(),getHeight());
		for (int i=0;i<=BALL_LENGTH-1;i++)
		{
			y=getHeight()-frog[0].getHeight()-ballY[i]+scroll;
			y=(y+32*BALL_LENGTH/2)%(32*BALL_LENGTH)-32*BALL_LENGTH/2;
			if (-frog[0].getHeight()<=y && y<getHeight())
			{
				g.drawImage(ball,ballX[i],y);
			}
		}
		g.drawImage(frog[pose],
		    frogX,getHeight()-frog[0].getHeight()-frogY+scroll);
		g.unlock(true);
	}

	// イベント

	public void processEvent(int type,int param)
	{
		if (type==Display.TIMER_EXPIRED_EVENT && param==ID_TIMER)
		{
			mainLoop();
			repaint();
		}
		
		if (type==Display.KEY_PRESSED_EVENT && param==Display.KEY_SOFT1)
		{
			save();
			exit();
		}
		if (type==Display.KEY_PRESSED_EVENT && param==Display.KEY_SOFT2)
		{
			if (rank==0)
			{
				checkRank=true;
			}
			else
			{
				rank=0;
			}
		}
	}

	// 記録の保存

	private void load()
	{
		StreamConnection connection;
		DataInputStream in;
	
		try {
			connection=(StreamConnection)
			    (Connector.open("scratchpad:///0",Connector.READ));
			in=connection.openDataInputStream();
			hiscore=in.readInt();
			in.close();
			connection.close();
		} catch (IOException e) {}
	}

	private void save()
	{
		StreamConnection connection;
		DataOutputStream out;
	
		try {
			connection=(StreamConnection)
			    (Connector.open("scratchpad:///0",Connector.WRITE));
			out=connection.openDataOutputStream();
			out.writeInt(hiscore);
			out.close();
			connection.close();
		} catch (IOException e) {}
	}

	// 記録のランキング

	private void checkRank()
	{
		HttpConnection connection;
		Reader reader;
		char[] line;
		int length;
	
		try {
			connection=(HttpConnection)
			    (Connector.open(IApplication.getCurrentApp().getSourceURL()+
			    "ranking.cgi?"+hiscore,Connector.READ));
			connection.setRequestMethod(HttpConnection.GET);
			connection.connect();
			
			reader=new InputStreamReader(connection.openInputStream());
			line=new char[32];
			length=reader.read(line);
			rank=Integer.parseInt(new String(line,0,length).trim());
			reader.close();
			
			connection.close();
		} catch (IOException e) {}
	}

	// 終了

	private void exit()
	{
		MediaResource resource;
	
		timer.stop();
		timer.dispose();
		
		for (Enumeration enum=media.elements();enum.hasMoreElements();)
		{
			resource=(MediaResource)(enum.nextElement());
			resource.unuse();
			resource.dispose();
		}
		IApplication.getCurrentApp().terminate();
	}
}