public GetResponse ProcessRobotInput(string inputs, MartianMap map)
{
var response = new GetResponse();
foreach (var input in inputs.ToUpperInvariant())
{
if (input == nameof(GetResponse.Turns.L)[0])
{
if ((int)currentDirection > 0)
{
currentDirection = currentDirection - 1;
}
else
{
currentDirection = GetResponse.Directions.West;
}
}
if (input == nameof(GetResponse.Turns.R)[0])
{
if ((int)currentDirection < 3)
{
currentDirection = currentDirection + 1;
}
else
{
currentDirection = GetResponse.Directions.North;
}
}
if (input == nameof(GetResponse.Turns.F)[0])
{
var previousCell = new int[]
{
currentX, currentY
};
switch (currentDirection)
{
case GetResponse.Directions.North:
if (!HasScent(currentX, currentY, map))
{
currentY++;
}
else if (map.GetMapPosition(currentX, currentY + 1) != deathCell)
{
currentY++;
}
else
{
response.Message = $"Suicide at {currentX}, {currentY + 1} is forbidden";
}
break;
case GetResponse.Directions.East:
if (!HasScent(currentX, currentY, map))
{
currentX++;
}
else if (map.GetMapPosition(currentX + 1, currentY) != deathCell)
{
currentX++;
}
else
{
response.Message = $"Suicide at {currentX + 1}, {currentY} is forbidden";
}
break;
case GetResponse.Directions.South:
if (!HasScent(currentX, currentY, map))
{
currentY--;
}
else if (map.GetMapPosition(currentX, currentY - 1) != deathCell)
{
currentY--;
}
else
{
response.Message = $"Suicide at {currentX}, {currentY - 1} is forbidden";
}
break;
case GetResponse.Directions.West:
if (!HasScent(currentX, currentY, map))
{
currentX--;
}
else if (map.GetMapPosition(currentX - 1, currentY) != deathCell)
{
currentX--;
}
else
{
response.Message = $"Suicide at {currentX - 1}, {currentY} is forbidden";
}
break;
default:
throw new ArgumentOutOfRangeException();
}
currentScent = HasScent(currentX, currentY, map);
if (map.GetMapPosition(currentX, currentY)
.Equals(deathCell, StringComparison.InvariantCultureIgnoreCase))
{
map.MarkAsScent(previousCell[0], previousCell[1]);
Death();
response.Message = $"Robot died at {previousCell[0]}, {previousCell[1]}, cell marked as {scentCell} Dangerous";
}
}
}
response.X = currentX;
response.Y = currentY;
response.Scent = currentScent;
response.Direction = currentDirection;
return(response);
}
private bool HasScent(int x, int y, MartianMap map)
{
var scent = map.GetMapPosition(x, y);
return(scent == scentCell);
}