#include <locale.h>
#include <stdio.h>
#include <string.h>

#include "config.h"
#include "pieces.h"


void print_board(int board[BOARD_SIZE][BOARD_SIZE]) {
  for (int rank = BOARD_SIZE - 1; rank >= 0; rank--) {
    printf("%i|", rank + 1);
    for (int file = 0; file < BOARD_SIZE; file++) {
      int piece = board[rank][file];
      printf("%s ", pieces[piece]);
    }
    printf("\n");
  }
  printf("  a b c d e f g h\n");
}

void parse_FEN(char* FEN, int board[BOARD_SIZE][BOARD_SIZE]) {
  // TODO: parse everything, not position only
  int rank = 7;
  int file = 0;
  size_t lenght = strlen(FEN);

  for (int k = 0; k < lenght; k++) {
    if (FEN[k] > '0' && FEN[k] <= '8') {
      int last_file = file + FEN[k] - '0';
      for (file; file < last_file; file++) {
        board[rank][file] = EMPTY;
      }
    } else {
      switch (FEN[k]) {
        case 'r':
          board[rank][file] = BLACK | ROOK;
          break;
        case 'R':
          board[rank][file] = ROOK;
          break;
        case 'n':
          board[rank][file] = BLACK | KNIGHT;
          break;
        case 'N':
          board[rank][file] = KNIGHT;
          break;
        case 'b':
          board[rank][file] = BLACK | BISHOP;
          break;
        case 'B':
          board[rank][file] = BISHOP;
          break;
        case 'q':
          board[rank][file] = BLACK | QUEEN;
          break;
        case 'Q':
          board[rank][file] = QUEEN;
          break;
        case 'k':
          board[rank][file] = BLACK | KING;
          break;
        case 'K':
          board[rank][file] = KING;
          break;
        case 'p':
          board[rank][file] = BLACK | PAWN;
          break;
        case 'P':
          board[rank][file] = PAWN;
          break;
        case '/':
          rank--;
          file = -1; // so that it becomes 0
          break;
        case ' ':
          return;
        default:
          board[rank][file] = KNIGHT;
      }
      file++;
    }
  }
}

int main() {
  int board[BOARD_SIZE][BOARD_SIZE];
  parse_FEN(DEFAULT_FEN, board);
  print_board(board);

	return 0;
}