static void Main()
{
var rover = new Rover();
var instructions = new List <string>();
var commands = new List <Func <bool> >();
Console.WriteLine("Hello Mars! Provide 5 commands one by one. Choose from left/right or <x>m e.g. 50m.");
// Capture 5 instructions
for (var i = 0; i < 5; i++)
{
instructions.Add(Console.ReadLine());
}
// filter for invalid commands
if (!instructions.All(instruction => !string.IsNullOrWhiteSpace(instruction) &&
(instruction.Trim().ToLower().Equals("left") ||
instruction.Trim().ToLower().Equals("right") ||
instruction.Trim().ToLower().EndsWith('m') &&
int.TryParse(instruction.Trim().Remove(instruction.Length - 1), out _))))
{
Console.WriteLine("Invalid command present.");
}
else
{
// Construct the command list
foreach (var instruction in instructions)
{
switch (instruction.ToLower())
{
case "left":
commands.Add(() => rover.TurnLeft());
break;
case "right":
commands.Add(() => rover.TurnRight());
break;
default:
if (instruction.Trim().ToLower().EndsWith('m') &&
int.TryParse(instruction.Trim().Remove(instruction.Length - 1), out var units))
{
var result = units;
commands.Add(() => rover.Proceed(result));
}
break;
}
}
if (!rover.AddCommands(commands))
{
return;
}
Console.WriteLine($"Performing commands. Rover present at {rover.CurrentPosition} facing {rover.FacingDirection.ToString()}");
// process command list
rover.Process();
}
}
