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

public class MakeChessManual extends JPanel implements ActionListener
{
  JTextArea text=null;
  JScrollPane scroll=null;
  ChessBoard board=null;
  ChessPoint[][] point;
  LinkedList 棋譜=null;
  LinkedList 吃掉的棋子=null;    
  JButton buttonUndo;
  int i=0;
  public MakeChessManual(ChessBoard board,ChessPoint[][] point)   
  {
   this.board=board;
   this.point=point;
   text=new JTextArea();
   scroll=new JScrollPane(text);
   棋譜=new LinkedList();
   吃掉的棋子=new LinkedList();
   buttonUndo=new JButton("悔棋");
   buttonUndo.setFont(new Font("隸書",Font.PLAIN,18));
   setLayout(new BorderLayout());
   add(scroll,BorderLayout.CENTER);
   add(buttonUndo,BorderLayout.SOUTH);
   buttonUndo.addActionListener(this);
  }
  public char numberToLetter(int n)   
  { 
    char c='\0';
    switch(n)
     {
       case 1 : c='A'; break;
       case 2 : c='B'; break;
       case 3 : c='C'; break;
       case 4 : c='D'; break;
       case 5 : c='E'; break;
       case 6 : c='F'; break;
       case 7 : c='G'; break;
       case 8 : c='H'; break;
       case 9 : c='I'; break;
       case 10 : c='J'; break;
     } 
    return c;
  }
  public void 記錄棋譜(ChessPiece piece,int startI,int startJ,int endI,int endJ)
  { 
     Point pStart=new Point(startI,startJ);
     Point pEnd=new Point(endI,endJ);
     MoveStep step=new MoveStep(pStart, pEnd);
     棋譜.add(step);
     
     String 棋子類別=piece.棋子類別();
     String name=piece.getName();
     String m="#"+棋子類別+name+": "+
              startI+numberToLetter(startJ)+" 到 "+endI+numberToLetter(endJ);
     text.append(m);
     if(piece.棋子類別().equals(board.黑方顏色))
        text.append("\n");
  }
 public void 記錄吃掉的棋子(Object object)
  {
     吃掉的棋子.add(object);
  }
 
  public LinkedList 獲取棋譜()
  {
     return 棋譜;
  }
 public void actionPerformed(ActionEvent e)
  { 
   int position=text.getText().lastIndexOf("#");
   if(position!=-1)
     text.replaceRange("",position,text.getText().length());
   if(棋譜.size()>0)
     {
      MoveStep lastStep=(MoveStep)棋譜.getLast();
      棋譜.removeLast();
      Object qizi=吃掉的棋子.getLast();
      吃掉的棋子.removeLast();
      String temp=qizi.toString();
     if(temp.equals("沒吃棋子"))
      {
        int startI=lastStep.pStart.x;
        int startJ=lastStep.pStart.y; 
        int endI=lastStep.pEnd.x;
        int endJ=lastStep.pEnd.y; 
        ChessPiece piece=point[endI][endJ].getPiece();
        
        point[startI][startJ].setPiece(piece,board);
        (point[endI][endJ]).set有棋子(false);
 
        if(piece.棋子類別().equals(board.紅方顏色))
         {
           board.紅方走棋=true;
           board. 黑方走棋=false;
         }
        if(piece.棋子類別().equals(board.黑方顏色))
         {
           board.黑方走棋=true;
           board.紅方走棋=false;
         }
       }
     else
       {
         ChessPiece removedPiece=(ChessPiece)qizi;
         int startI=lastStep.pStart.x;
         int startJ=lastStep.pStart.y; 
         int endI=lastStep.pEnd.x;
         int endJ=lastStep.pEnd.y; 
         ChessPiece piece=point[endI][endJ].getPiece();
         point[startI][startJ].setPiece(piece,board);     
         point[endI][endJ].setPiece(removedPiece,board);  
         (point[endI][endJ]).set有棋子(true);
 
        if(piece.棋子類別().equals(board.紅方顏色))
         {
           board.紅方走棋=true;
           board. 黑方走棋=false;
         }
        if(piece.棋子類別().equals(board.黑方顏色))
         {
           board.黑方走棋=true;
           board.紅方走棋=false;
         }
      }
    }
  }
}