/// <summary>
/// 駒が置かれていない座標を取得します。
/// </summary>
/// <returns></returns>
private (int row, int column) VacantPosition(ITicTacToeModel model, int boardSize, PlayerForm player)
{
//駒が置かれていない座標をランダムに取得
int row;
int column;
Random random = new Random();
row = random.Next(0, boardSize);
column = random.Next(0, boardSize);
while (!model.BoardStatuses[row, column].Equals(PlayerForm.None))
{
row = random.Next(0, boardSize);
column = random.Next(0, boardSize);
}
var list = new List <PlayerForm>();
var count = 0;
//縦横斜めの列のうち、自分の駒が一つもないかつ、相手の駒が一つ以上あるかつ、相手の駒の数が多い列に駒を置く
//行の判定
for (int i = 0; i < boardSize; i++)
{
for (int j = 0; j < boardSize; j++)
{
list.Add(model.BoardStatuses[i, j]);
}
if (!list.Contains(player) && list.Contains(player.GetOpponentPlayerForm()) && count < list.Count(element => element == player.GetOpponentPlayerForm()))
{
count = list.Count(element => element == player.GetOpponentPlayerForm());
row = i;
var index = random.Next(0, list.Count - 1);
while (list[index] != PlayerForm.None)
{
index = random.Next(0, list.Count - 1);
}
column = index;
}
list.Clear();
}
//列の判定
for (int j = 0; j < boardSize; j++)
{
for (int i = 0; i < boardSize; i++)
{
list.Add(model.BoardStatuses[i, j]);
}
if (!list.Contains(player) && list.Contains(player.GetOpponentPlayerForm()) && count < list.Count(element => element == player.GetOpponentPlayerForm()))
{
count = list.Count(element => element == player.GetOpponentPlayerForm());
var index = random.Next(0, list.Count - 1);
while (list[index] != PlayerForm.None)
{
index = random.Next(0, list.Count - 1);
}
row = index;
column = j;
}
list.Clear();
}
//右斜めの判定
for (int i = 0; i < boardSize; i++)
{
for (int j = 0; j < boardSize; j++)
{
var x = i;
var y = j;
while (0 <= x && y < boardSize)
{
list.Add(model.BoardStatuses[x, y]);
x--;
y++;
}
if (list.Count < model.AlignNumber)
{
list.Clear();
break;
}
if (!list.Contains(player) && list.Contains(player.GetOpponentPlayerForm()) && count < list.Count(element => element == player.GetOpponentPlayerForm()))
{
count = list.Count(element => element == player.GetOpponentPlayerForm());
var index = random.Next(0, list.Count - 1);
while (list[index] != PlayerForm.None)
{
index = random.Next(0, list.Count - 1);
}
row = i - index;
column = j + index;
}
list.Clear();
}
}
//左斜めの判定
for (int i = 0; i < boardSize; i++)
{
for (int j = 0; j < boardSize; j++)
{
var x = i;
var y = j;
while (x < boardSize && y < boardSize)
{
list.Add(model.BoardStatuses[x, y]);
x++;
y++;
}
if (list.Count < model.AlignNumber)
{
list.Clear();
break;
}
if (!list.Contains(player) && list.Contains(player.GetOpponentPlayerForm()) && count < list.Count(element => element == player.GetOpponentPlayerForm()))
{
count = list.Count(element => element == player.GetOpponentPlayerForm());
var index = random.Next(0, list.Count - 1);
while (list[index] != PlayerForm.None)
{
index = random.Next(0, list.Count - 1);
}
row = i + index;
column = j + index;
}
list.Clear();
}
}
return(row, column);
}