import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.Sprite;

public class MainCanvas extends GameCanvas 
				implements Runnable, CommandListener{
	public static final int GAME_UI				= 0;	//進(jìn)入用戶界面
	public static final int GAME_GAMING			= 1;	//進(jìn)行游戲
	public static final int GAME_BUTTON			= 2;	//游戲時(shí)顯示界面按鈕
	public static final int GAME_END				= 3;	//游戲結(jié)束
	public static final int GAME_STATE_NUM 		= 4;	//狀態(tài)總數(shù)
	private int m_nState	= GAME_UI;						//存儲(chǔ)當(dāng)前的游戲狀態(tài)
	
	private boolean		m_bRunning;			    		//控制線程運(yùn)行
	private MyUI			m_UI;							//界面對(duì)象
	private Sprite			m_TextSp;						//圖形文字對(duì)象
	private Mahjong		m_Mahjong;						//麻將對(duì)象
	private Command MenuCommand;							//高級(jí)按鈕對(duì)象
	public MainCanvas( ){
		super(true);			
		try{
			//創(chuàng)建用戶界面，并設(shè)置界面中的按鈕
			MyButton button = new MyButton(41, 21, 0, 1, -1, -1, -1, 2);
			m_UI = new MyUI(button);
        }
        catch(Exception exception){}
        setState(GAME_UI);
		Start();
	}
	//重新開牌
	private void Reset(){	
		if( m_Mahjong == null ){
			m_Mahjong = new Mahjong(getWidth(), getHeight());
		}
		m_Mahjong.Reset();
        if( MenuCommand == null ){
        	//創(chuàng)建菜單
        	MenuCommand = new Command("Menu", Command.OK, 0);
        	addCommand(MenuCommand);
            setCommandListener(this);
        }
        if( m_TextSp == null ){
        	//創(chuàng)建圖形文字對(duì)象
        	try{
        		Image img = Image.createImage("/demo/text.png");
        		m_TextSp = new Sprite(img, 82, 25);
        		m_TextSp.defineReferencePixel(41, 23);
        		int x = getWidth()/2;
        		int y = getHeight()/2 - 10;
        		m_TextSp.setRefPixelPosition(x, y);
        	}
        	catch(Exception exception){}
        }
        
	}
	private void setState( int state ){					//設(shè)置游戲狀態(tài)
		if( state < 0 || state >= GAME_STATE_NUM )
			return;
		m_nState = state;
		switch( m_nState ){
		case GAME_UI:										//進(jìn)入用戶界面
			m_UI.setState(MyUI.UI_TITLE);					//顯示標(biāo)題界面
			//設(shè)置本游戲的按鈕類型，本游戲有:開始及退出兩種按鈕
			m_UI.getButton().setShow(true, false, false, false, false, true );
			break;
		case GAME_BUTTON:									//在游戲中途顯示按鈕
			m_UI.setState(MyUI.UI_BUTTON);
			//游戲中途，顯示復(fù)位與退出按鈕
			m_UI.getButton().setShow(false, true, false, false, false, true );
			break;
		case GAME_GAMING:									//正在游戲
			m_UI.setState(MyUI.UI_HIDE);
			break;
		case GAME_END:										//游戲結(jié)束
			m_UI.setState(MyUI.UI_HIDE);
			break;
		}
	}
	public void Start(){
		m_bRunning = true;
		Thread thread = new Thread(this);	//分配新線程
		thread.start();						//線程啟動(dòng)
	}
	public void run() {
		//得到系統(tǒng)當(dāng)前時(shí)間,并將時(shí)間換算成毫秒
		long T1 = System.currentTimeMillis();
		long T2 = T1;
		while(m_bRunning){
			T2 = System.currentTimeMillis();
			if( T2 - T1 > 150 ){			//間隔150毫秒
				T1 = T2;
				Input();
				Logic();
				Paint();
			}
		}
	}
	public void Stop(){
		m_bRunning = false;
	}
	public void Input(){
		int keyStates = getKeyStates();
		switch( m_nState ){
		case GAME_UI:
			{
				switch( m_UI.Input( keyStates ) ){
				case MyButton.BUTTON_START:					//按下開始鍵
					Reset();
					setState(GAME_GAMING);
					break;
				case MyButton.BUTTON_EXIT:					//按下退出鍵
					MahjongMidlet.midlet.notifyDestroyed();
					break;
				}
			}
			break;			
		case GAME_GAMING:									//游戲中
			try{
				m_Mahjong.Input(keyStates);
			}
			catch(Exception e){
				e.printStackTrace();
			}
			break;
		case GAME_BUTTON:									//游戲中途顯示按鈕
			{
				switch( m_UI.Input( keyStates ) ){
				case MyButton.BUTTON_RESET:					//按下復(fù)位鍵
					Reset();
					setState(GAME_GAMING);
					break;
				case MyButton.BUTTON_EXIT:					//按下退出鍵
					MahjongMidlet.midlet.notifyDestroyed();
					break;
				}
			}
			break;
		case GAME_END:
			if( ( keyStates & GameCanvas.FIRE_PRESSED ) != 0 ){
				Reset();
				setState(GAME_GAMING);
			}
			break;
		}
	}
	public void Logic(){	
		switch( m_nState ){
		case GAME_GAMING:
			try{
				m_Mahjong.Logic();
			}
			catch(Exception e){
				e.printStackTrace();
			}
			switch( m_Mahjong.getState() ){
			case Mahjong.STATE_COM_HU:
			case Mahjong.STATE_NOBONE:
				m_TextSp.setFrame(1);						//電腦勝利
				setState(GAME_END);
				break;
			case Mahjong.STATE_PLA_HU:
				m_TextSp.setFrame(0);						//玩家勝利
				setState(GAME_END);
				break;
			}
			break;
		}
	}
	public void Paint(){
		Graphics g = getGraphics();
		//用黑色清屏
		g.setColor(0);
		g.fillRect( 0, 0, getWidth(), getHeight() );
		
		g.setColor(0xFFFF0000);
		switch( m_nState ){
		case GAME_UI:								//顯示界面
			m_UI.Paint(g, getWidth(), getHeight());
			break;			
		case GAME_GAMING:							//顯示游戲畫面
		case GAME_BUTTON:
		case GAME_END:
			try{
				m_Mahjong.Paint(g, getWidth(), getHeight());
			}
			catch(Exception e){
				e.printStackTrace();
			}
			if( m_nState == GAME_END )
				m_TextSp.paint(g);
			m_UI.Paint(g, getWidth(), getHeight());
			break;
		}
		flushGraphics();
	}
	public void commandAction(Command c, Displayable s){
		if( c == MenuCommand ){
			switch( m_nState ){	
			case GAME_END:							//游戲結(jié)束，顯示按鈕
			case GAME_GAMING:						//正在游戲，顯示按鈕	
				setState(GAME_BUTTON);
				break;
			case GAME_BUTTON:						//正顯示按鈕，退回游戲
				setState(GAME_GAMING);
				break;
			default:
				break;
			}
		}
	}
}