import com.sun.lwuit.Button;
import com.sun.lwuit.Dialog;
import com.sun.lwuit.Display;
import com.sun.lwuit.Form;
import com.sun.lwuit.Label;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.layouts.GridLayout;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import java.util.Random;

public class TicTacToe extends MIDlet implements ActionListener {


    private Button[] mButtons = new Button[9];          
    private Label[] mLabels = new Label[6];
    
    private int index;
    private int players;
    private int level;
    
       public TicTacToe() {        
       }

       protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
              // TODO Auto-generated method stub
       }

       protected void pauseApp() {
              // TODO Auto-generated method stub
       }

       protected void startApp() throws MIDletStateChangeException {
              // TODO Auto-generated method stub
              
        Display.init(this);
        Form f = new Form("Tic-Tac-Toe");
        f.setLayout(new GridLayout(4,4));
       
	      mLabels[0]= new Label("1");
	      mLabels[1]= new Label("2");
	      mLabels[2]= new Label("3");       
	      mLabels[3]= new Label("A");
	      mLabels[4]= new Label("B");
	      mLabels[5]= new Label("C"); 
              
              for( int i =0;i<9;i++){
                     mButtons[i] = new Button("");
                     mButtons[i].setName(Integer.toString(i));
                     mButtons[i].addActionListener(this);
              }
              index = 1;    
              players = 0;
        
        f.addComponent(mButtons[0]);
        f.addComponent(mButtons[1]);
        f.addComponent(mButtons[2]);
        f.addComponent(mLabels[0]);
        f.addComponent(mButtons[3]);
        f.addComponent(mButtons[4]);
        f.addComponent(mButtons[5]);      
        f.addComponent(mLabels[1]);
        f.addComponent(mButtons[6]);
        f.addComponent(mButtons[7]);
        f.addComponent(mButtons[8]);         
        f.addComponent(mLabels[2]);
        f.addComponent(mLabels[3]);
        f.addComponent(mLabels[4]);
        f.addComponent(mLabels[5]);
        
              if(Dialog.show("Game mode:", "Select player count?", "1", "2")== false){
                     players = 2;
              }
              else{
                     players = 1;  
              }
              if(Dialog.show("Game Difficulty Level:", "Select Artificial-?", "Nonsense", "Intelligence")== false){
                     level = 2; //Intelligence
              }
              else{
                     level = 1; //Nonsense
              }             
        f.show();
       }
       
       public void CleanScreen() {
              for( int i =0;i<9;i++){
                     mButtons[i].setText("");
              }
              index=1;
       }
       
       public void HandleRetryExit(String caption){
              // Create Dialog, add text and image, associate a sound
              if(Dialog.show(caption, "Try again ?", "Yes", "No")== false){
                     Display.getInstance().exitApplication();
              }
              else{
                     // Start again
                     CleanScreen();       
              }
       }
         
       public int random(){
           //Generate random integers in range 0..8.
           Random randomGenerator = new Random();
           return randomGenerator.nextInt(9);
         }
         
       
       public int checkWinner() {
              int ret = 0;
              
              // check rows
              for(int i = 0; i<3; i++){
                     if( mButtons[0+(i*3)].getText() == mButtons[1+(i*3)].getText() &&
                           mButtons[0+(i*3)].getText() == mButtons[2+(i*3)].getText() ){
                           if(mButtons[0+(i*3)].getText() == "X"){
                                  ret = 1;
                           }
                           else if(mButtons[0+(i*3)].getText() == "O") {
                                  ret = 2;
                           }
                                  
                     }
              }
              
              // check columns
              for(int i = 0; i<3; i++){
                     if( mButtons[0+i].getText() == mButtons[3+i].getText() &&
                           mButtons[0+i].getText() == mButtons[6+i].getText() ){
                           if(mButtons[0+i].getText() == "X"){
                                  ret = 1;
                           }
                           else if(mButtons[0+i].getText() == "O") {
                                  ret = 2;
                           }
                                  
                     }
              }      
              
              // check cross line \
              if( mButtons[0].getText() == mButtons[4].getText() &&
                           mButtons[0].getText() == mButtons[8].getText() ){
                           if(mButtons[0].getText() == "X"){
                                  ret = 1;
                           }
                           else if(mButtons[0].getText() == "O"){
                                  ret = 2;
                           }
              }
              
              // check cross line /
              if( mButtons[2].getText() == mButtons[4].getText() &&
                           mButtons[2].getText() == mButtons[6].getText() ){
                           if(mButtons[2].getText() == "X"){
                                  ret = 1;
                           }
                           else if(mButtons[2].getText() == "O"){
                                  ret = 2;
                           }
              }
              
              // Check game state
              if(ret == 1){
                     HandleRetryExit("Winner is X.");    
              }
              else if(ret == 2) {
                     HandleRetryExit("Winner is O.");               
              }
              else if (index == 10){
                     HandleRetryExit("The game is draw.");
                     ret = 3;
              }
                     
              return ret;
       }
       
    public void artificialNonsense(){
       int button;
       // randomize all turns
       while(mButtons[button=random()].getText().length() != 0){
              ;
       }
       mButtons[button].setText("X");
       index++; // next turn is human player
    }
    
    public void artificialIntelligence(){
       // Use real logic
       // Find 2 pair lines -> no -> set random -> otherwise block
              // check rows
       
       index++; // next turn is human player
       
       // check columns
              for(int i = 1; i<8; i=i+3){              
                     // columns 1 and 2
                     if( mButtons[i].getText().length() != 0 ){
                           if(    mButtons[i].getText() == mButtons[i-1].getText() ){
                                  if(mButtons[i+1].getText() == ""){
                                         mButtons[i+1].setText("X");
                                         return;
                                  }                    
                           }
                           // columns 2 and 3
                           if( mButtons[i].getText() == mButtons[i+1].getText() ){
                                  if(mButtons[i-1].getText() == ""){
                                         mButtons[i-1].setText("X");
                                         return;
                                  }                    
                           }                    
                           // columns 1 and 3
                           if( mButtons[i-1].getText() == mButtons[i+1].getText() ){
                                  if(mButtons[i].getText() == ""){
                                         mButtons[i].setText("X");
                                         return;
                                  }                    
                           }
                     }
              }

              // check rows
              for(int i = 3; i<6; i++){
                     // rows 1 and 2
                     if( mButtons[i].getText().length() != 0 ){
                           if( mButtons[i].getText() == mButtons[i-3].getText() ){
                                  if(mButtons[i+3].getText() == ""){
                                         mButtons[i+3].setText("X");
                                         return;
                                  }                    
                           }
                           // rows 2 and 3
                           if( mButtons[i].getText() == mButtons[i+3].getText() ){
                                  if(mButtons[i-3].getText() == ""){
                                         mButtons[i-3].setText("X");
                                         return;
                                  }                    
                           }                                 
                     }
                     // rows 1 and 3
                     if( mButtons[i-3].getText().length() != 0 ){
                           if( mButtons[i-3].getText() == mButtons[i+3].getText() ){
                                  if(mButtons[i].getText() == ""){
                                         mButtons[i].setText("X");
                                         return;
                                  }                    
                           }             
                     }             
              }      
              
              // check cross lines
              if( mButtons[4].getText().length() != 0 ){
                     // line 0-4
                     if(    mButtons[0].getText() == mButtons[4].getText() ){
                           if(mButtons[8].getText() == ""){
                                  mButtons[8].setText("X");
                                  return;
                           }                                               
                     }
                     // line 4-8
                     if( mButtons[4].getText() == mButtons[8].getText() ){
                           if(mButtons[0].getText() == ""){
                                  mButtons[0].setText("X");
                                  return;
                           }                                               
                     }                          
                     // line 6-4
                     if( mButtons[6].getText() == mButtons[4].getText() ){
                           if(mButtons[2].getText() == ""){
                                  mButtons[2].setText("X");
                                  return;
                           }                                               
                     }
                     // line 4-2
                     if(    mButtons[4].getText() == mButtons[2].getText() ){
                           if(mButtons[6].getText() == ""){
                                  mButtons[6].setText("X");
                                  return;
                           }                                               
                     }      
              }
              
              
              // line 0-8
              if( mButtons[0].getText().length() != 0 &&
                     mButtons[0].getText() == mButtons[8].getText() ){
                     if(mButtons[4].getText() == ""){
                           mButtons[4].setText("X");
                           return;
                     }                                               
              }
              // line 2-6
              if( mButtons[2].getText().length() != 0 &&
                     mButtons[2].getText() == mButtons[6].getText() ){
                     if(mButtons[4].getText() == ""){
                           mButtons[4].setText("X");
                           return;
                     }                                               
              }                    
              
              // use nonsense logic
              index--;
              artificialNonsense();
    }
    
    
       public void actionPerformed(ActionEvent arg0) {
              // Check action
              int status;
              Button b = (Button) arg0.getSource();
              
              if(b.getText().length() == 0 ){
                     if(index % 2 == 0){
                           b.setText("X");
                     }
                     else{
                           b.setText("O");
                     }
               index++;
               status=checkWinner();
               if (status == 0 && players == 1){
                     // set computer move
                     if(level == 1){
                            artificialNonsense();      
                     }
                     else{
                            artificialIntelligence();
                     }
              
                     status=checkWinner();
               }
              }
       }
}