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#include "../include/chess_ai.hpp"
chess_ai::chess_board::chess_board() : SIZE(CHESS_BOARD_SIZE) {
init_board_vector();
}
chess_ai::chess_board::chess_board(board_state state) : SIZE(CHESS_BOARD_SIZE) {
unsigned vec_index, sqr_index;
init_board_vector();
if(state == initial) {
for(vector_iterator it_vec = grid.begin(); it_vec != grid.end();
++it_vec) {
for(square_iterator it_sqr = (*it_vec).begin();
it_sqr != (*it_vec).end(); ++it_sqr) {
chess_piece piece;
piece_colour colour;
if(vec_index < 3) {
colour = black;
} else {
colour = white;
}
vec_index = it_vec - grid.begin();
sqr_index = it_sqr - (*it_vec).begin();
if(vec_index == 1 || vec_index == 6) {
piece.set_type(pawn);
} else if(vec_index == 0 || vec_index == 7) {
if(sqr_index == 0 || sqr_index == 7)
piece.set_type(rook);
else if(sqr_index == 1 || sqr_index == 6)
piece.set_type(knight);
else if(sqr_index == 2 || sqr_index == 5)
piece.set_type(bishop);
else if(sqr_index == 3)
piece.set_type(queen);
else if(sqr_index == 4)
piece.set_type(king);
}
piece.set_colour(colour);
piece.set_x(sqr_index);
piece.set_y(vec_index);
*it_sqr = piece;
}
}
} else {
for(auto& row : grid) {
for(auto& square : row) {
chess_piece piece;
square = piece;
}
}
}
}
chess_ai::chess_board::~chess_board() {}
void chess_ai::chess_board::init_board_vector() {
for(unsigned i = 0; i < SIZE; ++i) {
std::vector<chess_ai::chess_piece> tmp_vec;
for(unsigned j = 0; j < SIZE; ++j) {
chess_piece piece;
tmp_vec.push_back(piece);
}
grid.push_back(tmp_vec);
}
}
void chess_ai::chess_board::print_board() {
std::cout << " |";
for(unsigned i = 0; i < SIZE; ++i) {
std::cout << "---|";
}
std::cout << std::endl << "8 |";
for(unsigned y = 0; y < SIZE; ++y) {
for(unsigned x = 0; x < SIZE; ++x) {
std::cout << " " << grid[y][x].str() << " |";
}
std::cout << std::endl << " |";
if(y == SIZE-1) {
std::cout << "---+";
for(unsigned i = 0; i < SIZE-2; ++i) {
std::cout << "---+";
}
std::cout << "---|" << std::endl;
} else {
for(unsigned i = 0; i < SIZE-1; ++i) {
std::cout << "---+";
}
std::cout << "---|" << std::endl;
std::cout << 7-y << " |";
}
}
std::cout << " a b c d e f g h" << std::endl;
}
void chess_ai::chess_board::set_piece(chess_piece piece) {
square_iterator it_sqr;
*iterate_board(it_sqr, piece.x, piece.y) = piece;
}
void chess_ai::chess_board::remove_piece(chess_piece piece) {
remove_piece(piece.x, piece.y);
}
void chess_ai::chess_board::remove_piece(unsigned x, unsigned y) {
square_iterator it_sqr;
*iterate_board(it_sqr, x, y) = chess_piece();
}
chess_ai::move_error chess_ai::chess_board::move_piece(chess_piece piece) {
return move_piece(piece.x, piece.y);
}
chess_ai::move_error chess_ai::chess_board::move_piece(unsigned x, unsigned y) {
square_iterator it;
iterate_board(it, x, y);
if(it->y < 7 && it->y > 0) {
if(it->colour == white)
return move_piece(x, y, x, y-1);
return move_piece(x, y, x, y+1);
}
return move_error_IllegalMove;
}
chess_ai::move_error chess_ai::chess_board::move_piece
(chess_ai::chess_piece piece, unsigned x, unsigned y) {
return move_piece(piece.x, piece.y, x, y);
}
chess_ai::move_error chess_ai::chess_board::move_piece
(unsigned orig_x, unsigned orig_y, unsigned dest_x, unsigned dest_y) {
chess_piece taken;
return move_piece(orig_x, orig_y, dest_x, dest_y, taken);
}
chess_ai::move_error chess_ai::chess_board::move_piece
(unsigned orig_x, unsigned orig_y, unsigned dest_x, unsigned dest_y,
chess_piece& taken_piece) {
square_iterator it;
square_iterator new_it;
iterate_board(it, orig_x, orig_y);
iterate_board(new_it, dest_x, dest_y);
switch(it->type) {
case pawn:
return move_pawn(it, new_it, taken_piece);
case rook:
case knight:
case bishop:
case queen:
case king:
default:
return move_error_IllegalMove;
}
}
chess_ai::square_iterator& chess_ai::chess_board::iterate_board
(square_iterator& it, unsigned x, unsigned y) {
unsigned vec_index, sqr_index;
for(vector_iterator it_vec = grid.begin(); it_vec != grid.end(); ++it_vec) {
for(square_iterator it_sqr = (*it_vec).begin();
it_sqr != (*it_vec).end(); ++it_sqr) {
vec_index = it_vec - grid.begin();
sqr_index = it_sqr - (*it_vec).begin();
if(vec_index == y && sqr_index == x) {
it = it_sqr;
return it;
}
}
}
return it;
}
chess_ai::move_error chess_ai::chess_board::move_pawn
(square_iterator it, square_iterator new_it, chess_piece& taken_piece) {
chess_piece piece(it->type, it->colour, new_it->x, new_it->y);
if((new_it->y - it->y == 2 && it->y == 1) ||
((int)new_it->y - (int)it->y == -2 && it->y == 6) ||
(new_it->y - it->y == 1 && piece.colour == black && it->y < 7) ||
((int)new_it->y - (int)it->y == -1 && piece.colour == white &&
it->y > 0)) {
if(new_it->x == it->x) {
if(new_it->type == empty) {
remove_piece(it->x, it->y);
set_piece(piece);
return move_Success;
} else if(new_it->colour == it->colour) {
return move_error_FriendlyPieceOnDestination;
}
return move_error_EnemyPieceOnDestination;
} else if(new_it->x - it->x == 1 || (int)new_it->x - (int)it->x == -1) {
if(new_it->colour != it->colour && new_it->colour != none) {
taken_piece.set(new_it->type, new_it->colour, new_it->x,
new_it->y);
remove_piece(it->x, it->y);
set_piece(piece);
return move_Success;
} else if(new_it->colour == it->colour) {
return move_error_FriendlyPieceOnDestination;
}
}
}
return move_error_IllegalMove;
}
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