Untitled

class Program
{
    static void Main(string[] args)
    {

        double number;
        IUI ui = new ConsoleIO();
     
        Stack<double> numberStack = new Stack<double>();
        Controller controller = new Controller();
        //finns en egent stack i .net

        DisplayMenuContent();
        //DoubleStack stack = new DoubleStack();
        while (true)
        {
            ui.WriteOutput("Välj några siffror, sedan kan du välja vad dessa ska göra\n");
            number = controller.CheckValidDoubleInput();
            AppendStack(number);
            DisplayStack();

            string LetterOrArithmetic = controller.CheckValidLetterInput(ui.ReadInput());


            //Om man skriver in fler än 1 char så blir det fel
            string input = Console.ReadLine().Trim();
            //om man trycker enter blir värdet i command ett mellanslag annars första strecket
            if (input == "") input = " ";
            //kontrollerar om första tecknet är en digit
            //If the command is a digit, it is interpreted as a number, converted to double, and pushed onto the stack.
            char command = input[0];
            if (Char.IsDigit(command))
            {
                //Konverterar även fler tecken än det första. 
                double value = Convert.ToDouble(input);
                numberStack.Push(value);
            }
            //If the command is '+', two values are popped from the stack, added together, and the result is pushed back onto the stack.
            //Tar de sista skrivna värderna i stacken och lägger ihop dem
            if (command == '+')
            {
                numberStack.Push(numberStack.Pop() + numberStack.Pop());
            }
            //If the command is '*', two values are popped from the stack, multiplied together, and the result is pushed back onto the stack.
            else if (command == '*')
            {
                numberStack.Push(numberStack.Pop() * numberStack.Pop());
            }

            //If the command is '-', two values are popped from the stack, subtracted from each other (order matters), and the result is pushed back onto the stack.
            //Tar översta värdet först och sparar det. Andra värdet subtraheras, dvs det sista in. Last in first ouy. 
            else if (command == '-')
            {
                double d = numberStack.Pop();
                numberStack.Push(numberStack.Pop() - d);
            }
            //If the command is '/', two values are popped from the stack, divided (order matters), and the result is pushed back onto the stack.
            else if (command == '/')
            {
                double d = numberStack.Pop();
                numberStack.Push(numberStack.Pop() / d);
            }
            //If the command is 'c', the stack is cleared.
            //Sätter depth till noll
            else if (command == 'c')
            {
                numberStack.Clear();
            }

            //If the command is 'q', the program breaks out of the loop and terminates.
            else if (command == 'q')
            {
                break;
            }
            else
            {
                //If the command is not recognized, an error message is displayed.
                Console.WriteLine("Illegal command, ignored");
            }

        }

         void DisplayMenuContent()
        {
            ui.WriteOutput(
                       
                        "tryck - för att subthrahera\n" +
                        "tryck + för att addera\n" +
                        "tryck * för att multiplicera\n" +
                        "tryck / för att dividera\n" +
                        "tryck q för att stänga programmet\n" +
                        "tryck c för att rensa\n" +
                        "\n");
           
        }

        void DisplayStack()
        {
            ui.WriteOutput("[");
            //Skriver ut en lista
            numberStack.ToList().ForEach(number => ui.WriteOutput(number.ToString()+ ","));
            ui.WriteOutput("]\n");
        }
        void AppendStack(double number)
        {
            numberStack.Push(number);
        }
    }


}