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

//本程序實現了掃雷游戲的基本操作,包括中鍵打開周圍8個格,但還有待不斷完善
class MyButton extends JButton{       // 按鈕類繼承自 JButton
	public int x, y;                    //坐標
	private boolean isBomb = false;      //是否是雷   
	private boolean isFlaged = false;    //是否設置為旗幟
	private boolean isOpened = false;    //是否作鍵打開
	private int bombNumber = 0;          //周圍8個格的地雷數量
	MyButton(int x, int y) {
		this.x = x;
		this.y = y;
		}
	public void Init() {                  //初始化
		isBomb = false;
		isFlaged = false;
		isOpened = false;	
	}
	public void setBomb() { isBomb = true; }
	public void setFlaged() { isFlaged = true; }
	public void deleteFlag() { isFlaged = false; }
	public void setOpened() { isOpened = true; }
	public void setBombNumber(int bombNumber) { this.bombNumber = bombNumber;} 
	public boolean isBomb() { return isBomb; }
	public boolean isFlaged() { return isFlaged; }
	public boolean isOpened() { return isOpened; }
	public int getBombNumber() { return bombNumber; }	
	public String getBombNumber(int i) {
		Integer bNumber = new Integer(bombNumber);
		return bNumber.toString();
		}
	}
 
public class SweepBomb extends MouseAdapter{
	final int Rows = 10, Columns = 10, TotalBomb = 20; //設置大小和地雷數
	int bombNow;                                      //當前地雷數量
	private boolean gameOver = false;                 //游戲失敗標記
	private static Random rand = new Random();        //隨機數埋雷
	JFrame sweepFrame;                                //以下為界面設計
	JPanel panel1, panel2;
	JButton start;
	JLabel label;
	JTextField textl1, textl2;
	MyButton[][] sweepBombButton = new MyButton[Rows][Columns];
  
	SweepBomb() {
		sweepFrame = new JFrame("掃雷游戲");
		sweepFrame.setBounds(100, 0, 60*Columns, 60*Rows);
		panel1 = new JPanel();
 	    panel2 = new JPanel();
 	    start = new JButton("重新開始");
 	    start.addMouseListener(this);
 	    label = new JLabel("雷數");
 	    textl1 = new JTextField(new Integer(TotalBomb).toString());
 	    textl2 = new JTextField("小心地雷");
 	    panel1.setLayout(new FlowLayout());
	 	panel2.setLayout(new GridLayout(Rows, Columns, 0, 0));
	 	panel1.add(start);
	 	panel1.add(label);
	 	panel1.add(textl1);
	 	panel1.add(textl2);
		
	 	for(int i = 0; i < Rows; i++) {
	 		for(int j = 0; j < Columns; j++) {
	 			sweepBombButton[i][j] = new MyButton(i, j);
	 			sweepBombButton[i][j].addMouseListener(this);		
	 			panel2.add(sweepBombButton[i][j]);
	 			}
	 	}
	 	
	 	sweepFrame.setLayout(new BorderLayout(0,0));
		sweepFrame.add(panel1,BorderLayout.NORTH);
		sweepFrame.add(panel2,BorderLayout.CENTER);
		sweepFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);	
		sweepFrame.setVisible(true);
		startGame();             //開始游戲
	}
	
	public void Init() {                //將每個按鍵初始化
		for(int i = 0; i < Rows; i++) {
			for(int j = 0; j < Columns; j++) {
				sweepBombButton[i][j].Init();
				sweepBombButton[i][j].setForeground(Color.black);
				sweepBombButton[i][j].setText("");
				}
			}
		}
	
	public void berryBomb() {     //隨機埋地雷,地雷數指定
		bombNow = TotalBomb;
		for(int beryBomb = TotalBomb; beryBomb > 0; beryBomb--){
			int i,j;
			do {
				i = rand.nextInt(Rows);
			    j = rand.nextInt(Columns);
				} while(sweepBombButton[i][j].isBomb());
			sweepBombButton[i][j].setBomb();
			}
	}

	public int getBombNumber(int x, int y) {   //查找周圍的地雷總數
		int sum = 0;
		if(x - 1 >= 0 && y - 1 >= 0 && (sweepBombButton[x-1][y-1].isBomb())) 
			sum++;
		if(x - 1 >= 0 && (sweepBombButton[x-1][y].isBomb())) 
			sum++;
		if(x - 1 >= 0 && y + 1 < Columns && (sweepBombButton[x-1][y+1].isBomb())) 
			sum++;
		if(y - 1 >= 0 && (sweepBombButton[x][y-1].isBomb())) 
			sum++;
		if(y + 1 < Columns && (sweepBombButton[x][y+1].isBomb())) 
			sum++;
		if(x + 1 < Columns && y - 1 >= 0 && (sweepBombButton[x+1][y-1].isBomb())) 
			sum++;
		if(x + 1 < Columns && (sweepBombButton[x+1][y].isBomb())) 
			sum++;
		if(x + 1 < Columns && y + 1 < Columns && (sweepBombButton[x+1][y+1].isBomb())) 
			sum++;
		return sum;
	}
	
	public void startGame() {  //開始游戲
		gameOver = false;       
		berryBomb();             //重新埋地雷
		label.setText("雷數");
 	    textl1.setText(new Integer(TotalBomb).toString());
 	    textl2.setText("小心地雷");
	 	for(int i = 0; i < Rows; i++) {
	 		for(int j = 0; j < Columns; j++) {
	 			if(!sweepBombButton[i][j].isBomb())
	 				sweepBombButton[i][j].setBombNumber(this.getBombNumber(i, j));
	 		}
	 	}		
	}
	
	public void blankAera(int x, int y) { //左鍵按到0,打開一片為0的區域,采用遞歸法
		if(sweepBombButton[x][y].getBombNumber() == 0 && 
		  (!sweepBombButton[x][y].isFlaged()) &&(!sweepBombButton[x][y].isOpened()))   {
			sweepBombButton[x][y].setForeground(Color.blue);
			sweepBombButton[x][y].setText("0");
			sweepBombButton[x][y].setOpened();
			if(x-1 >= 0) blankAera(x-1, y);
			if(x+1 < Columns) blankAera(x+1, y);
			if(y - 1 >=0) blankAera(x, y-1);
			if(y + 1 < Rows) blankAera(x, y+1);
			}
	}
	
	//以下兩個函數用于實現中鍵操作
	public boolean aroundEqual(int x, int y) {  //查找周圍8個格的紅旗數量
		int sum = 0;
		if(x - 1 >= 0 && y - 1 >= 0 && (sweepBombButton[x-1][y-1].isFlaged())) 
			sum++;
		if(x - 1 >= 0 && (sweepBombButton[x-1][y].isFlaged())) 
			sum++;
		if(x - 1 >= 0 && y + 1 < Columns && (sweepBombButton[x-1][y+1].isFlaged())) 
			sum++;
		if(y - 1 >= 0 && (sweepBombButton[x][y-1].isFlaged())) 
			sum++;
		if(y + 1 < Columns && (sweepBombButton[x][y+1].isFlaged())) 
			sum++;
		if(x + 1 < Columns && y - 1 >= 0 && (sweepBombButton[x+1][y-1].isFlaged())) 
			sum++;
		if(x + 1 < Columns && (sweepBombButton[x+1][y].isFlaged())) 
			sum++;
		if(x + 1 < Columns && y + 1 < Columns && (sweepBombButton[x+1][y+1].isFlaged())) 
			sum++;
		return sum == sweepBombButton[x][y].getBombNumber();	
	}
	
		
	public void openAround(int x, int y) {  
		//打開周圍8個格,遇到是地雷但沒有標記紅旗則游戲結束
		for(int i = x-1; i <= x+1; i++) {
			for(int j = y-1; j <= y+1; j++) {
				if(i >= 0 && i < Rows && j >= 0 && j < Columns) {
					if(sweepBombButton[i][j].isBomb()) {
						if(!sweepBombButton[i][j].isFlaged()) {
							sweepBombButton[i][j].setForeground(Color.black);
							sweepBombButton[i][j].setText("*");
							gameOver();
							gameOver = true;
						}
					}
					else {
						sweepBombButton[i][j].setOpened();
						sweepBombButton[i][j].setForeground(Color.blue);
						sweepBombButton[i][j].setText(sweepBombButton[i][j].getBombNumber(1));
						}
					}
				}
		}
	}
	
	public void gameOver() {  //游戲結束,顯示所有地雷
		textl2.setText("很遺憾，你輸了！");
		for(int i = 0; i < Rows; i++) {
			for(int j = 0; j < Columns; j++) {
				if(sweepBombButton[i][j].isBomb()) {
					sweepBombButton[i][j].setForeground(Color.black);
					sweepBombButton[i][j].setText("*");	
				}
					
			}
		}
	}
	public boolean isWin() {   //所有按鍵都打開則獲勝,地雷掃出獲勝
		if(bombNow != 0) 
			return false;
		for(int i = 0; i < Rows; i++) {
			for(int j = 0; j < Columns; j++) {
				if((!sweepBombButton[i][j].isOpened()) && (!sweepBombButton[i][j].isFlaged()))
					return false;
			}
		}
		return true;
	}
		        
	public void mouseClicked(MouseEvent e) {   //鼠標操作響應
		if(e.getSource() == start){     //按動重新開始按鈕則重新開始游戲
			Init();
			startGame();
		}
		else {
			if(!gameOver && !isWin()){   //沒贏也沒輸的情況下
				int i = ((MyButton)e.getSource()).x;   //找到對應按鍵
				int j = ((MyButton)e.getSource()).y;
				if(e.getButton() == e.BUTTON1) {        //如果按下左鍵
		              if(sweepBombButton[i][j].isBomb()){  //踩雷的話結束游戲
		            	 gameOver();
		            	 gameOver = true;
		             	 }
		              else {                            //否則打開按鍵
		            	  int bombAround = sweepBombButton[i][j].getBombNumber();
		            	  if(bombAround == 0){     //按鍵數為0打開一片為0的區域
		            		  blankAera(i, j);
		            		  }
		            	  else {
		            		  Integer bombNumber = new Integer(bombAround);
		            		  sweepBombButton[i][j].setForeground(Color.blue);
			            	  sweepBombButton[i][j].setText(bombNumber.toString());
			            	  sweepBombButton[i][j].setOpened();
			            	  }
		            	  }
		              }
		         else if(e.getButton() == e.BUTTON3) {   //如果按下右鍵
		        	if(!sweepBombButton[i][j].isOpened()){   //已經打開的話沒反應
		        		if(sweepBombButton[i][j].isFlaged()){//已經插紅旗的話變成問號
			         		sweepBombButton[i][j].deleteFlag();//取消設置紅旗
			         		sweepBombButton[i][j].setForeground(Color.green);
			         		sweepBombButton[i][j].setText("?");
			         		bombNow++;                        //當前地雷數增加
			         		textl1.setText((new Integer(bombNow).toString()));	
			         	}
			         	else {
			         		sweepBombButton[i][j].setFlaged();  //沒有插紅旗則插上紅旗
				        	 sweepBombButton[i][j].setForeground(Color.red);
				        	 sweepBombButton[i][j].setText("旗");
				        	 bombNow--;                        //當前地雷數減小
				        	 textl1.setText((new Integer(bombNow).toString()));		
			         	}			
		        	}					         			        	 
		         }
		         else if(e.getButton() == e.BUTTON2) {       //如果在打開的按鍵上按下中鍵
		        	 if(sweepBombButton[i][j].isOpened()) {  
		        		 if(aroundEqual(i, j)) {   //周圍標出地雷數等于實際地雷數
				         		openAround(i, j);      //打開周圍8個
				         		}
		        		 }		         	
		         	}
				if(isWin()) {
					textl2.setText("恭喜你贏了!");
				}
			}
		}	
	}

	public static void main(String[] args) {
		SweepBomb sweepBomb = new SweepBomb();
	}

}