/*
  tictac_lib.c

  Library file implementation. See tictac_lib.h for the definition
  of the functions.
*/
#include <stdio.h>
#include <stdlib.h>
#include "tictac_def.h"

int isRowFull(char board[10][10], int N, char player, int row)
{
   int count = 0, col = 0;
   for (col = 0; col < N; col++)
   {
      if (board[row][col] == player)
         count++;
   }
   return (count == N);
}

int isColFull(char board[10][10], int N, char player, int col)
{
   int count = 0, row = 0;
   for (row = 0; row < N; row++)
   {
      if (board[row][col] == player)
         count++;
   }
   return (count == N);
}

int isDiagFull(char board[10][10], int N, char player)
{
   int count = 0, i = 0;
   for (i = 0; i < N; i++)
   {
      if (board[i][i] == player)
         count++;
   }
   return (count == N);
}

int isMinorDiagFull(char board[10][10], int N, char player)
{
   int count = 0, i = 0;
   for (i = 0; i < N; i++)
   {
      if (board[i][N-i-1] == player)
         count++;
   }
   return (count == N);
}

int hasPlayerWon(char board[10][10], int N, char player)
{
   int playerWon = FALSE;
   int row = 0, col = 0;

   for (row = 0; row < N; row++)
   {
      if (isRowFull(board, N, player, row))
         return TRUE;
   }

   for (col = 0; col < N; col++)
   {
      if (isColFull(board, N, player, col))
         return TRUE;
   }

   if (isDiagFull(board, N, player))
      return TRUE;
   if (isMinorDiagFull(board, N, player))
      return TRUE;

   return FALSE;
}

int gameOver(char board[10][10], int N)
{
   int row = 0, col = 0;
   for (row = 0; row < N; row++)
   {
      for (col = 0; col < N; col++)
      {
         if (board[row][col] == EMPTY)
            return FALSE;
      }
   }
   return TRUE;
}

void init_board(char board[10][10], int N)
{
   int row, col;
   for (row = 0; row < N; row++)
   {
      for (col = 0; col < N; col++)
      {
         board[row][col] = EMPTY;
      }
   }
}

void show_board(char board[10][10], int N)
{
   int row, col;

   for (row = 0; row < N-1; row++)
   {
      for (col = 0; col < N-1; col++)
      {
         printf(" %c |", board[row][col]);
      }
      printf(" %c\n", board[row][N-1]);
      for (col = 0; col < N-1; col++)
      {
         printf("---|");
      }
      printf("---\n");
   }
   for (col = 0; col < N-1; col++)
   {
      printf(" %c |", board[N-1][col]);
   }
   printf(" %c\n", board[N-1][N-1]);
}

void getMove(char board[10][10], int N, char player)
{
   int row, col;
   int valid_move = FALSE;
   
   while (!valid_move)
   {
      printf("\nPlayer %c, enter row col: ", player);
      scanf("%d%d", &row, &col);

      if (row < 1)
         printf("\tSorry, row must be positive\n");
      else if (row > N)
         printf("\tSorry, row must be less than %d\n", (N+1));
      else if (col < 1)
         printf("\tSorry, col must be positive\n");
      else if (col > N)
         printf("\tSorry, col must be less than %d\n", (N+1));
      else if (board[row-1][col-1] != EMPTY)
         printf("\tSorry, that position is already taken\n");
      else
      {
         board[row-1][col-1] = player;
         valid_move = TRUE;
      }
   }
}