//FormAI DATASET v0.1 Category: Chess AI ; Style: asynchronous
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>

#define BOARD_SIZE 8          // Define the board size
#define BLACK true            // Define a boolean for black
#define WHITE false           // Define a boolean for white

typedef char piece_type;
typedef bool color_type;

// Define structs for piece and position
typedef struct {
    piece_type type;
    color_type color;
} Piece;

typedef struct {
    int row;
    int col;
} Position;

// Define a struct for the chess board
typedef struct { 
    Piece *board[BOARD_SIZE][BOARD_SIZE];
} ChessBoard;

// Function to initialize the board
void init_board(ChessBoard* board){
    // Create Black pieces
    board->board[0][0] = (Piece*)malloc(sizeof(Piece));
    board->board[0][0]->color = BLACK;
    board->board[0][0]->type = 'r';
    board->board[0][1] = (Piece*)malloc(sizeof(Piece));
    board->board[0][1]->color = BLACK;
    board->board[0][1]->type = 'n';
    board->board[0][2] = (Piece*)malloc(sizeof(Piece));
    board->board[0][2]->color = BLACK;
    board->board[0][2]->type = 'b';
    board->board[0][3] = (Piece*)malloc(sizeof(Piece));
    board->board[0][3]->color = BLACK;
    board->board[0][3]->type = 'q';
    board->board[0][4] = (Piece*)malloc(sizeof(Piece));
    board->board[0][4]->color = BLACK;
    board->board[0][4]->type = 'k';
    board->board[0][5] = (Piece*)malloc(sizeof(Piece));
    board->board[0][5]->color = BLACK;
    board->board[0][5]->type = 'b';
    board->board[0][6] = (Piece*)malloc(sizeof(Piece));
    board->board[0][6]->color = BLACK;
    board->board[0][6]->type = 'n';
    board->board[0][7] = (Piece*)malloc(sizeof(Piece));
    board->board[0][7]->color = BLACK;
    board->board[0][7]->type = 'r';
    for(int i=0; i<BOARD_SIZE; i++){
        board->board[1][i] = (Piece*)malloc(sizeof(Piece));
        board->board[1][i]->color = BLACK;
        board->board[1][i]->type = 'p';
    }
    // Create White pieces
    board->board[7][0] = (Piece*)malloc(sizeof(Piece));
    board->board[7][0]->color = WHITE;
    board->board[7][0]->type = 'r';
    board->board[7][1] = (Piece*)malloc(sizeof(Piece));
    board->board[7][1]->color = WHITE;
    board->board[7][1]->type = 'n';
    board->board[7][2] = (Piece*)malloc(sizeof(Piece));
    board->board[7][2]->color = WHITE;
    board->board[7][2]->type = 'b';
    board->board[7][3] = (Piece*)malloc(sizeof(Piece));
    board->board[7][3]->color = WHITE;
    board->board[7][3]->type = 'q';
    board->board[7][4] = (Piece*)malloc(sizeof(Piece));
    board->board[7][4]->color = WHITE;
    board->board[7][4]->type = 'k';
    board->board[7][5] = (Piece*)malloc(sizeof(Piece));
    board->board[7][5]->color = WHITE;
    board->board[7][5]->type = 'b';
    board->board[7][6] = (Piece*)malloc(sizeof(Piece));
    board->board[7][6]->color = WHITE;
    board->board[7][6]->type = 'n';
    board->board[7][7] = (Piece*)malloc(sizeof(Piece));
    board->board[7][7]->color = WHITE;
    board->board[7][7]->type = 'r';
    for(int i=0; i<BOARD_SIZE; i++){
        board->board[6][i] = (Piece*)malloc(sizeof(Piece));
        board->board[6][i]->color = WHITE;
        board->board[6][i]->type = 'p';
    }
    // Initialize the empty spaces on the board
    for(int i=2; i<=5; i++){
        for(int j=0; j<BOARD_SIZE; j++){
            board->board[i][j] = NULL;
        }
    }
}

// Function to print the board with ASCII characters
void print_board(ChessBoard* board){
    printf("\n  a b c d e f g h\n");
    for(int i=0; i<BOARD_SIZE; i++){
        printf("%d ", i+1);
        for(int j=0; j<BOARD_SIZE; j++){
            if(board->board[i][j] == NULL){
                printf(". ");
            } else {
                printf("%c ", board->board[i][j]->type);
            }
        }
        printf("%d", i+1);
        printf("\n");
    }
    printf("  a b c d e f g h\n");
}

// Function to move a piece from one position to another
void move_piece(ChessBoard* board, Position current_pos, Position new_pos){
    // Check if move is within the board
    if(new_pos.row >= BOARD_SIZE || new_pos.row < 0 || new_pos.col >= BOARD_SIZE || new_pos.col < 0){
        printf("Invalid move.\n");
        return;
    }
    // Check if something is blocking the path
    int dy = new_pos.row - current_pos.row;
    int dx = new_pos.col - current_pos.col;
    int y_dir = dy == 0 ? 0 : dy/abs(dy);
    int x_dir = dx == 0 ? 0 : dx/abs(dx);
    int y = current_pos.row + y_dir;
    int x = current_pos.col + x_dir;
    while( y != new_pos.row || x != new_pos.col ){
        if(board->board[y][x] != NULL){
            printf("Invalid move.\n");
            return;
        }
        y += y_dir;
        x += x_dir;
    }
    // Check if moving piece is a valid piece
    if(board->board[current_pos.row][current_pos.col] == NULL){
        printf("Invalid move.\n");
        return;
    }
    // Check if moving the piece is allowed
    switch(board->board[current_pos.row][current_pos.col]->type){
        case 'p':
            // Check for standard pawn moves
            if((current_pos.col == new_pos.col) && (board->board[new_pos.row][new_pos.col] != NULL)){
                printf("Invalid move.\n");
                return;
            }
            // Check for pawn attack moves
            if(abs(current_pos.col - new_pos.col) == 1 && board->board[new_pos.row][new_pos.col] != NULL){
                if(board->board[current_pos.row][current_pos.col]->color == WHITE){
                    if(new_pos.row != current_pos.row-1){
                        printf("Invalid move.\n");
                        return;
                    }
                } else {
                    if(new_pos.row != current_pos.row+1){
                        printf("Invalid move.\n");
                        return;
                    }
                }
            } else {
                if(board->board[current_pos.row][current_pos.col]->color == WHITE){
                    if((current_pos.row - new_pos.row) > 2){
                        printf("Invalid move.\n");
                        return;
                    }
                } else {
                    if((new_pos.row - current_pos.row) > 2){
                        printf("Invalid move.\n");
                        return;
                    }
                }
                if(board->board[new_pos.row][new_pos.col] != NULL){
                    printf("Invalid move.\n");
                    return;
                }
            }
            break;
        case 'r':
            if(current_pos.row != new_pos.row && current_pos.col != new_pos.col){
                printf("Invalid move.\n");
                return;
            } 
            break;
        case 'n':
            if(!((abs(current_pos.row - new_pos.row) == 2 && abs(current_pos.col - new_pos.col) == 1) 
                || (abs(current_pos.row - new_pos.row) == 1 && abs(current_pos.col - new_pos.col) == 2))) {
                printf("Invalid move.\n");
                return;
            }
            break;
        case 'b':
            if(abs(current_pos.row - new_pos.row) != abs(current_pos.col - new_pos.col)){
                printf("Invalid move.\n");
                return;
            }
            break;
        case 'q':
            if(!(current_pos.row == new_pos.row || current_pos.col == new_pos.col 
                || abs(current_pos.row - new_pos.row) == abs(current_pos.col - new_pos.col))) {
                printf("Invalid move.\n");
                return;
            }
            break;
        case 'k':
            if(!((abs(current_pos.row - new_pos.row) == 1 && abs(current_pos.col - new_pos.col) <= 1) 
                || (abs(current_pos.row - new_pos.row) <= 1 && abs(current_pos.col - new_pos.col) == 1))) {
                printf("Invalid move.\n");
                return;
            }
            break;
        default: // Should never happen
            break;
    }
    // Move the piece to the new position
    board->board[new_pos.row][new_pos.col] = board->board[current_pos.row][current_pos.col];
    board->board[current_pos.row][current_pos.col] = NULL;
}

// Example main function to test the asynchronous Chess AI
int main(){
    ChessBoard board;
    init_board(&board);
    print_board(&board);
    move_piece(&board, (Position){6, 4}, (Position){4, 4});
    print_board(&board);
    move_piece(&board, (Position){0, 1}, (Position){2, 2});
    print_board(&board);
    move_piece(&board, (Position){7, 4}, (Position){5, 3});
    print_board(&board);
    move_piece(&board, (Position){1, 1}, (Position){2, 1});
    print_board(&board);
    move_piece(&board, (Position){0, 6}, (Position){2, 5});
    print_board(&board);
    move_piece(&board, (Position){7, 3}, (Position){5, 4});
    print_board(&board);
    move_piece(&board, (Position){0, 2}, (Position){3, 5}); //Invalid move
    print_board(&board);
return 0;
}
