import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;

/**
 * MiniMineSweeper: This is a game 
 * @author Ye Wang
 */
public class MiniMineSweeper implements MouseListener{
   public static final int ROW, COLOMN, WIDTH, HEIGHT;
  
   static {
    ROW=3;
    COLOMN=3;
    WIDTH=400;
    HEIGHT=300;
   }
   private int boom;//Define the location of mine
   
   private MyPanel myPanel= new MyPanel();
   private JFrame myFrame = new JFrame();
   private ArrayList<JButton> list=new ArrayList<JButton>();

   String str="BOOooM!!! Would you like to play again?";

   public static void main(String[] args) {
      MiniMineSweeper myGui=new MiniMineSweeper();
      myGui.go();
   }
   /**
     * Show the "welcome" dialog when the game begins
     */  
   public MiniMineSweeper(){
      JOptionPane.showMessageDialog(null,"Welcome to MiniMineSweeper!\n"
      +"The object of the game is to click on all \n"
      +"the squares EXCEPT the one with the bomb.\n"
      +"(There is only one bomb). To choose a square \n"
      +" to display please simply click on the square.");
    }
   /**
     * Set the game frame 
     */
   public void go(){
      boom=(int)(Math.random()*8);
      
      for(int i=0;i<ROW*COLOMN;i++)
         list.add(new JButton());
      myFrame.setTitle("Boom!");
      myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      myFrame.addMouseListener(this);
      myFrame.setSize(WIDTH, HEIGHT);
      
      //System.out.println(boom+"");
      myPanel.setLayout(new GridLayout(ROW,COLOMN));
  
      for (JButton button : list){
         button.addMouseListener(this);
         button.setBackground(Color.gray);
         myPanel.add(button);
      } //Set the initial interface of game
  
       myFrame.getContentPane().add(myPanel);
       myFrame.setVisible(true);
   }

   public void mouseClicked(MouseEvent e) {
   }
   public void mousePressed(MouseEvent e) {
   }
   public void mouseExited(MouseEvent e) {
   }
   public void mouseEntered(MouseEvent e) {
   }
   /**
    * Decide what to do when user clicks on a button
    */
   public void mouseReleased(MouseEvent e) {
    
      if (list.indexOf(e.getComponent())==boom){
         e.getComponent().setBackground(Color.black);
         showOption(str);
      }//Boom when the user click on the mine
      else e.getComponent().setBackground(Color.white);
        
      if (win()) {
           str="Congratulations!!! Would you like to"
           +"play again?";
      showOption(str);
      }
   } 
   /**
     * deal with user's option 
     */
   public void showOption(String str){
      if(JOptionPane.showConfirmDialog(null, str, "", 
         JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION) {
         boom=(int)(Math.random()*8);
         for (JButton button: list)
            button.setBackground(Color.gray);
            myPanel.setVisible(true);
      }//restart the game
      else System.exit(0);//exit the game
   }


   /**
     * Compute the remain area to check whether the user won
     */
   private boolean win() {
      int count = 0;
      boolean clear=false;
      for(JButton panel:list) {
         if(panel.getBackground() == Color.WHITE) 
            count++;
      }
      if(count == 8) clear=true;
      return clear;
   }
   /**
     * MyPanel:This is a inner class for setting panel
     */
   public class MyPanel extends JPanel {
      public void paintComponent(Graphics g){
      g.drawLine(WIDTH/3,0,WIDTH/3,HEIGHT);
      g.drawLine(WIDTH/3*2,0,WIDTH/3*2,HEIGHT);
      g.drawLine(0,HEIGHT/3*1,WIDTH,HEIGHT/3*2);
   }// draw the border of the button
}
}