import java.awt.*;
import java.awt.event.*;

public class Move
{
   //basic set of variables
	public int srccol = 0;
	public int srcrow = 0;
   public int destcol = 0;
	public int destrow = 0;
	public int victcol = 0;
	public int victrow = 0;
	public int prtnrcol = 0;
	public int prtnrrow = 0;
	public int bencol = 0;   //"beneficiary" if the enemy pawn which this move 
	public int benrow = 0;	 //did not capture en passe and which has thus changed its enpasse status to false 
   public int transforms = 0; // 1,2,3,4 - queen/rook/bishop/knight
   public int castle = 0;     //1,2 - short/long
   public boolean enpasse = false;  //does this move capture a pawn en passe?
	public boolean check = false;
	public boolean doublecheck = false;
	public boolean checkmate = false;
	public boolean stalemate = false;

	public String srcname = null;	  //"king/queen/rook/bishop/knight/pawn"
	public String srcowner = null;  //"white/black"
	public boolean srcenpasse = false;   //was the source piece vulnerable to enpasse?
	public boolean srccancastle = false; //was the source piece in pa position to castle?
	public String victname = null;  //"king/queen/rook/bishop/knight/pawn"
	public String victowner = null; //"white/black"
	public boolean victenpasse = false; //was the victim piece vulnerable to enpasse?
	public boolean victcancastle = false; //was the victim piece in pa position to castle?

	//auxiliary set 1
	public Square srcsqr = null;
	public Square destsqr = null;
	public Square victsqr = null;
	public Square prtnrsqr = null;

	//auxiliary set 2
	public Piece srcpiece = null;
	public Piece victpiece = null;
	public Piece prtnrpiece = null;

	//auxiliary set 3
	public Field srcfld = null;
	public Field destfld = null;
	public Field victfld = null;
	public Field prtnrfld = null;
   
	//fot easier analysis
	public double estimate = -1000;

   public Move() {clear();}
   
   public Move(Move m)
   {
      srccol = m.srccol; srcrow = m.srcrow;
      destcol = m.destcol; destrow = m.destrow;
      victcol = m.victcol; victrow = m.victrow;
		prtnrcol = m.prtnrcol; prtnrrow = m.prtnrrow;
		bencol = m.bencol; benrow = m.benrow;

      transforms = m.transforms; castle = m.castle; enpasse = m.enpasse;
		check = m.check; checkmate = m.checkmate; stalemate = m.stalemate;

		srcsqr = m.srcsqr; destsqr = m.destsqr; victsqr = m.victsqr; prtnrsqr = m.prtnrsqr;
		srcfld = m.srcfld; destfld = m.destfld; victfld = m.victfld; prtnrfld = m.prtnrfld;

		srcpiece = m.srcpiece; victpiece = m.victpiece; prtnrpiece = m.prtnrpiece;

		srcname = (m.srcname == null) ? null : new String(m.srcname);
		srcowner = (m.srcowner == null) ? null : new String(m.srcowner);
		srcenpasse = m.srcenpasse;
		srccancastle = m.srccancastle;
		victname = (m.victname == null) ? null : new String(m.victname);
		victowner = (m.victowner == null) ? null: new String(m.victowner);
		victenpasse = m.victenpasse;
		victcancastle = m.victcancastle;

   }

	//set check and add doublecheck if one check already exists
	public void addCheck()
	{
		if (check == true) doublecheck = true;
		else check = true;
	}
   
	//knowing only srccol,srcrow,destcol,destrow
	public boolean buildMoveFromSrcAndDest(Position p)
	{
		srcsqr = p.square[srccol][srcrow];
		destsqr = p.square[destcol][destrow];
		srcpiece = srcsqr.piece;
		//is this move self-consistent?
		if (!PositionAnalysis.checkConsistency(this,p)) return false;
		//establish castle
		PositionAnalysis.establishCastle(this,p);
		//we don't get transformation piece because computer will think it up
		//establish enpasse status of the move
		PositionAnalysis.establishEnpasseStatus(this,p);
		//establish victim attributes
		PositionAnalysis.establishVictim(this,p);
		//set src and victim pieces' characteristics
		PositionAnalysis.establishSourceAttributes(this);
		PositionAnalysis.establishVictimAttributes(this);
		//establish beneficiary, if any
		PositionAnalysis.establishBeneficiary(this,p);
		//is this move valid, i.e. made according to the rules?
		if (!PositionAnalysis.checkValidity(this,p)) return false;
		//is this move possible, i.e. does it expose my king to check?
		if (!PositionAnalysis.checkPossibility(this,p)) return false;
		//establish if it's a check, or doublecheck
		PositionAnalysis.establishMoveResults(this,p);
		return true;
	}

	//assumes: srccol,srcrow,destcol,destrow are set
	public boolean buildMoveFromSrcAndDest(Chess c)
	{
		srcfld = c.field[srccol][srcrow];
		destfld = c.field[destcol][destrow];
		srcsqr = c.curPos.square[srccol][srcrow];
		destsqr = c.curPos.square[destcol][destrow];
		srcpiece = srcfld.piece;
		//is this move self-consistent?
		if (!PositionAnalysis.checkConsistency(this,c)) return false;
		//establish castle
		PositionAnalysis.establishCastle(this,c);
		//get transformation piece, if necessary
		if (Chessboard.withinPawnRange(new Square(srccol,srcrow),new Square(destcol,destrow),srcpiece.owner)) 
			Chess.establishTransformation(this);
		//establish enpasse status of the move
		PositionAnalysis.establishEnpasseStatus(this,c);
		//establish victim attributes
		PositionAnalysis.establishVictim(this,c);
		//set src and victim pieces' characteristics
		PositionAnalysis.establishSourceAttributes(this);
		PositionAnalysis.establishVictimAttributes(this);
		//establish beneficiary, if any
		PositionAnalysis.establishBeneficiary(this,c);
		//is this move valid, i.e. made according to the rules?
		if (!PositionAnalysis.checkValidity(this,c.curPos)) return false;
		//is this move possible, i.e. does it expose my king to check?
		if (!PositionAnalysis.checkPossibility(this,c.curPos)) return false;
		//establish if it's a check, or doublecheck
		PositionAnalysis.establishMoveResults(this,c.curPos);
		return true;
	}

	public void produceAuxiliaryVariables(Position p)
	{
		//at least source and destination should be known
		if (srcrow == 0 || srccol == 0 || destrow == 0 || destcol == 0) return;
		//set 1
		srcsqr = p.square[srccol][srcrow];
		destsqr = p.square[destcol][destrow];
		if (victcol != 0 && victrow != 0) victsqr = p.square[victcol][victrow];
		if (prtnrcol != 0 && prtnrrow != 0) prtnrsqr = p.square[prtnrcol][prtnrrow];
		//set 2
		srcpiece = srcsqr.piece;
		if (victsqr != null) victpiece = victsqr.piece;
		if (prtnrsqr != null) prtnrpiece = prtnrsqr.piece;
	}

	public void produceAuxiliaryVariables(Chess c)
	{
		//at least source and destination should be known
		if (srcrow == 0 || srccol == 0 || destrow == 0 || destcol == 0) return;
		//set 3
		srcfld = c.field[srccol][srcrow];
		destfld = c.field[destcol][destrow];
		if (victcol != 0 && victrow != 0) victfld = c.field[victcol][victrow];
		if (prtnrcol != 0 && prtnrrow != 0) prtnrfld = c.field[prtnrcol][prtnrrow];
		//set 2
		srcpiece = srcfld.piece;
		if (victfld != null) victpiece = victfld.piece;
		if (prtnrfld != null) prtnrpiece = prtnrfld.piece;
	}

   public void clear()
	{
		srccol = 0; srcrow = 0; 
		destcol = 0; destrow = 0;
		victcol = 0; victrow = 0;
		prtnrcol = 0; prtnrrow = 0;
		bencol = 0; benrow = 0;
		transforms = 0; castle = 0; enpasse = false;
		check = false; checkmate = false; stalemate = false;
		srcsqr = null; destsqr = null; victsqr = null; prtnrsqr = null;
		srcpiece = null; victpiece = null; prtnrpiece = null;
		srcfld = null; destfld = null; victfld = null; prtnrfld = null;
		srcname = null; srcowner = null; srcenpasse = false; srccancastle = false;
		victname = null; victowner = null; victenpasse = false; victcancastle = false;
	}
	
	//"promise" of the move from general positional considerations
	public double positionalMerit()
	{
		double merit = 0;
		if (check) merit += 0.2;
		if (doublecheck) merit += 0.1;
		if (castle != 0) merit += 0.15;
		if (srcpiece.name.equals("pawn")) {
			if (srccol == 3 || srccol == 6) merit += 0.02;
			if (srccol == 4 || srccol == 5) merit += 0.05;
			if (srcpiece.owner.equals("white") && destrow == 6) merit +=0.05;
			if (srcpiece.owner.equals("white") && destrow == 7) merit += 0.1;
			if (srcpiece.owner.equals("black") && destrow == 3) merit +=0.05;
			if (srcpiece.owner.equals("black") && destrow == 2) merit += 0.1;
			if (enpasse) merit += 0.1;
		}
		if (srcpiece.name.equals("king")) {
			if (castle == 0) merit -= 0.05;
		}
		
		return merit;
	}

	public String toString()
   {
      if (srcsqr == null && srcfld == null) return ("invalid move: srcsqr/srcfld==null");
	   if (destsqr == null && destfld == null) return ("invalid move: destsqr/destfld==null");
	 	if (srcpiece == null) return ("invalid move: srcpiece==null");
      String str = "";
		if (castle == 1) str = str + "0-0"; 
		else if (castle == 2) str = str + "0-0-0";
		else 
		{
			str = str + srcpiece.abbreviation();
      	str = str + srcsqr.coords();
	   	if (victpiece == null) str = str + "-"; else str = str + ":";
	   	str = str + destsqr.coords();
      	if (transforms != 0)
      	{ 
         	if (transforms == 1) str = str + "Q";
         	if (transforms == 2) str = str + "R";
         	if (transforms == 3) str = str + "B";
         	if (transforms == 4) str = str + "Kt";
      	}
		}
		if (check == true) str = str + "+";
		else if (checkmate == true) str = str + "X";
		if (stalemate == true) str = str + "stalemate";
      return str;   
   }
}
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</div>
<script type="text/javascript">
if (typeof lycos_ad !== "undefined" && "slider" in lycos_ad) {
  document.write(lycos_ad['slider']);
}
</script> <!-- added 7/22 -->
<div id="FooterAd" style="background:#DFDCCF; border-top:1px solid #393939; clear:both; display:none; width:100%!important; position:relative; z-index:999999!important; height:90px!important"> 
<div class="adCenterClass" style="display:block!important; overflow:hidden; width:916px;">
<div id="footerAd_container" style="display:block!important; float:left; width:728px">
<iframe id="lycosFooterAdiFrame" style="border:0; display:block; float:left; height:96px; overflow:hidden; padding:0; width:750px"></iframe>
</div>
</div>
</div>