#include <conio.h>
#include <stdio.h>

#include "consts.h"
#include "protos.h"

char is_board_solved(BOARD board) {
    char cases[8] = {EMPTY};
    char i;

    // rows and cols
    for (i = 0; i < 3; i++) {
        cases[i] = board[i][0] * board[i][1] * board[i][2];
        cases[i + 3] = board[0][i] * board[1][i] * board[2][i];
    }

    // diagonals
    cases[6] = board[0][0] * board[1][1] * board[2][2];
    cases[7] = board[0][2] * board[1][1] * board[2][0];

    // check cases for winner
    for (i = 0; i < 8; i++) {
        if (cases[i] == 1) {
            // X won
            return X;
        } else if (cases[i] == 8) {
            // O won
            return O;
        }
    }

    // check cases for remaining moves
    for (i = 0; i < 9; i++) {
        if (cases[i] == EMPTY) {
            // more spaces left; game continues
            return EMPTY;
        }
    }

    // stalemate
    return TIE;
}

void print_board(BOARD board) {
    char i, j;

    for (i = 0; i < 3; i++) {
        for (j = 0; j < 3; j++) {
            printf("%d ", board[i][j]);
        }
        printf("\n");
    }
}

int main() {
    char solution = EMPTY;
    char move = EMPTY;
    char move_x = EMPTY;
    char move_y = EMPTY;
    BOARD board = {{EMPTY}, {EMPTY}, {EMPTY}};

    while (1) {
        print_board(board);

        solution = is_board_solved(board);
        switch (solution) {
            case X:
                printf("X won");
                break;
            case O:
                printf("O won");
                break;
            case TIE:
                printf("Stalemate");
                break;
            default:
                printf("Enter a move...");
        }
        printf("\n");

        cursor(1);
        move = cgetc() - '0' - 1;
        // if move is not a number then bail
        // if (move < 1 || move > 8) { invalid! }
        move_x = move % 3;
        move_y = move / 3;
        // if move not already taken
        board[move_y][move_x] = X;
    }

    return 0;
}