// COPYRIGHT NOTES
// ---------------
// This source code is a part of chess which is an example of <Game Programing guide>.
// You may use, compile or redistribute it as part of your application 
// for free. 
// You cannot redistribute sources without the official agreement of the author. 
// If distribution of you application which contents code below was occured, place 
// e-mail <hidebug@hotmail.com> on it is to be appreciated.
// This code can be used WITHOUT ANY WARRANTIES on your own risk.
// 
// Spring Wang <hidebug@hotmail.com>

// ---------------
// 版權(quán)聲明
// ---------------
// 本文件所含之代碼是《人機(jī)博弈程序設(shè)計(jì)指南》的范例程序中國(guó)象棋的一部分
// 您可以免費(fèi)的使用, 編譯 或者作為您應(yīng)用程序的一部分。 
// 但，您不能在未經(jīng)作者書(shū)面許可的情況下分發(fā)此源代碼。 
// 如果您的應(yīng)用程序使用了這些代碼，在您的應(yīng)用程序界面上 
// 放入 e-mail <hidebug@hotmail.com> 是令人欣賞的做法。
// 此代碼并不含有任何保證，使用者當(dāng)自承風(fēng)險(xiǎn)。
// 
// 王小春 <hidebug@hotmail.com>

// MoveGenerator.cpp: implementation of the CMoveGenerator class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "chess.h"
#include "MoveGenerator.h"

#ifdef _DEBUG
#undef THIS_FILE
static BYTE THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CMoveGenerator::CMoveGenerator()
{
	
}

CMoveGenerator::~CMoveGenerator()
{
	
}

int CMoveGenerator::AddMove(int nFromX, int nFromY, int nToX, int nToY,int nPly)
{
	m_MoveList[nPly][m_nMoveCount].From.x = nFromX;
	m_MoveList[nPly][m_nMoveCount].From.y = nFromY;
	m_MoveList[nPly][m_nMoveCount].To.x = nToX;
	m_MoveList[nPly][m_nMoveCount].To.y = nToY;
	m_nMoveCount++;
	return m_nMoveCount;
}

int CMoveGenerator::CreatePossibleMove(BYTE position[10][9], int nPly, int nSide)
{
	int     nChessID;
	int		i,j;
	
	m_nMoveCount = 0;
	for (i = 0; i < 10; i++)
		for (j = 0; j < 9; j++)
		{
			if (position[i][j] != NOCHESS)
			{
				nChessID = position[i][j];
				if (!nSide && IsRed(nChessID))
					continue;
				if (nSide && IsBlack(nChessID))
					continue;
				switch(nChessID)
				{
				case R_KING:
				case B_KING:
					Gen_KingMove(position, i, j, nPly);
					break;
					
				case R_BISHOP:
					Gen_RBishopMove(position, i, j, nPly);
					break;
					
				case B_BISHOP:
					Gen_BBishopMove(position, i, j, nPly);
					break;
					
				case R_ELEPHANT:
				case B_ELEPHANT:
					Gen_ElephantMove(position, i, j, nPly);
					break;
					
				case R_HORSE:		
				case B_HORSE:		
					Gen_HorseMove(position, i, j, nPly);
					break;
					
				case R_CAR:
				case B_CAR:
					Gen_CarMove(position, i, j, nPly);
					break;
					
				case R_PAWN:
					Gen_RPawnMove(position, i, j, nPly);
					break;
					
				case B_PAWN:
					Gen_BPawnMove(position, i, j, nPly);
					break;
					
				case B_CANON:
				case R_CANON:
					Gen_CanonMove(position, i, j, nPly);
					break;
					
				default:
					break;
					
				}
			}
		}
		
		return m_nMoveCount;
}



void CMoveGenerator::Gen_KingMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x,  y;
	for (y = 0; y < 3; y++)
		for (x = 3; x < 6; x++)
			if (IsValidMove(position, j, i, x, y))
				AddMove(j, i, x, y, nPly);

	for (y = 7; y < 10; y++)
		for (x = 3; x < 6; x++)
			if (IsValidMove(position, j, i, x, y))
				AddMove(j, i, x, y, nPly);
}

void CMoveGenerator::Gen_RBishopMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x,  y;
	for (y = 7; y < 10; y++)
		for (x = 3; x < 6; x++)
			if (IsValidMove(position, j, i, x, y))
				AddMove(j, i, x, y, nPly);
}

void CMoveGenerator::Gen_BBishopMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x,  y;
	for (y = 0; y < 3; y++)
		for (x = 3; x < 6; x++)
			if (IsValidMove(position, j, i, x, y))
				AddMove(j, i, x, y, nPly);
}

void CMoveGenerator::Gen_ElephantMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x,  y;

	x=j+2;
	y=i+2;
	if(x < 9 && y < 10  && IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
	x=j+2;
	y=i-2;
	if(x < 9 && y>=0  &&  IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
	x=j-2;
	y=i+2;
	if(x>=0 && y < 10  && IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
	x=j-2;
	y=i-2;
	if(x>=0 && y>=0  && IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
}

void CMoveGenerator::Gen_HorseMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x,  y;

	x=j+2;
	y=i+1;
	if((x < 9 && y < 10) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
	x=j+2;
	y=i-1;
	if((x < 9 && y >= 0) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
	x=j-2;
	y=i+1;
	if((x >= 0 && y < 10) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
	x=j-2;
	y=i-1;
	if((x >= 0 && y >= 0) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
	x=j+1;
	y=i+2;
	if((x < 9 && y < 10) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	x=j-1;
	y=i+2;
	if((x >= 0 && y < 10) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	x=j+1;
	y=i-2;
	if((x < 9 && y >= 0) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	x=j-1;
	y=i-2;
	if((x >= 0 && y >= 0) &&IsValidMove(position, j, i, x, y))
		AddMove(j, i, x, y, nPly);
	
}

void CMoveGenerator::Gen_RPawnMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x, y;
	int nChessID;

	nChessID = position[i][j];

	y = i - 1;
	x = j;
	
	if(y > 0 && !IsSameSide(nChessID, position[y][x]))
		AddMove(j, i, x, y, nPly);
	
	if(i < 5)
	{
		y=i;
		x=j+1;
		if(x < 9 && !IsSameSide(nChessID, position[y][x]))
			AddMove(j, i, x, y, nPly);
		x=j-1;
		if(x >= 0 && !IsSameSide(nChessID, position[y][x]))
			AddMove(j, i, x, y, nPly);
	}
}


void CMoveGenerator::Gen_BPawnMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x, y;
	int nChessID;

	nChessID = position[i][j];

	y = i + 1;
	x = j;
	
	if(y < 10 && !IsSameSide(nChessID, position[y][x]))
		AddMove(j, i, x, y, nPly);
	
	if(i > 4)
	{
		y=i;
		x=j+1;
		if(x < 9 && !IsSameSide(nChessID, position[y][x]))
			AddMove(j, i, x, y, nPly);
		x=j-1;
		if(x >= 0 && !IsSameSide(nChessID, position[y][x]))
			AddMove(j, i, x, y, nPly);
	}
	
}

void CMoveGenerator::Gen_CarMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x,  y;
	int nChessID;

	nChessID = position[i][j];
	
	x=j+1;
	y=i;
	while(x < 9)
	{
		if( NOCHESS == position[y][x] )
			AddMove(j, i, x, y, nPly);
		else
		{
			if(!IsSameSide(nChessID, position[y][x]))
				AddMove(j, i, x, y, nPly);
			break;
		}
		x++;
	}
	
	x = j-1;
	y = i;
	while(x >= 0)
	{
		if( NOCHESS == position[y][x] )
			AddMove(j, i, x, y, nPly);
		else
		{
			if(!IsSameSide(nChessID, position[y][x]))
				AddMove(j, i, x, y, nPly);
			break;
		}
		x--;
	}
	
	x=j;
	y=i+1;//
	while(y < 10)
	{
		if( NOCHESS == position[y][x])
			AddMove(j, i, x, y, nPly);
		else
		{
			if(!IsSameSide(nChessID, position[y][x]))
				AddMove(j, i, x, y, nPly);
			break;
		}
		y++;
	}
	
	x = j;
	y = i-1;//
	while(y>=0)
	{
		if( NOCHESS == position[y][x])
			AddMove(j, i, x, y, nPly);
		else
		{
			if(!IsSameSide(nChessID, position[y][x]))
				AddMove(j, i, x, y, nPly);
			break;
		}
		y--;
	}
}

void CMoveGenerator::Gen_CanonMove(BYTE position[10][9], int i, int j, int nPly)
{
	int x, y;
	BOOL	flag;
	int nChessID;

	nChessID = position[i][j];
	
	x=j+1;		//