public GameState Shoot(string gameId, int row, int column)
{
if (_shots.Count > 100)
throw new Exception("Too many shots!");
Debug.Assert(gameId == "42");
var shot = new CellCoords(row, column);
Debug.Assert(!_shots.Contains(shot));
_shots.Add(shot);
var hitShip = _ships
.Where(s => s.IsSunken == false)
.FirstOrDefault(s => s.PositionCells.Contains(shot));
if (hitShip == null)
{
return new GameState { IsFinished = false, LastShot = ShotResult.Miss };
}
hitShip.HitCells.Add(shot);
var state = new GameState {
IsFinished = _ships.Count(s => s.IsSunken == false) == 0,
LastShot = hitShip.IsSunken ? ShotResult.HitAndSunk : ShotResult.Hit
};
if (state.IsFinished)
{
CalculateScore(_shots.Count);
}
return state;
}
/// <summary>
/// Move the game to a new state. The current state is maintained
/// so that it can be returned to.
/// </summary>
/// <param name="state">the new game state</param>
public static void AddNewState(GameState state)
{
_state.Push(state);
UtilityFunctions.Message = "";
}
/// <summary>
/// End the current state and add in the new state.
/// </summary>
/// <param name="newState">the new state of the game</param>
public static void SwitchState(GameState newState)
{
EndCurrentState();
AddNewState(newState);
}