using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace P2.Sav3
{
    static class Calculator
    {

        public static void RunCalculator()
        {
            Info();

            Console.WriteLine("Įveskite funkciją (Sveikasis Skaičius)");
            int func = int.Parse(Console.ReadLine());

            if (func < 1 || func > 4)
            {
                Console.WriteLine("Klaidinga operacija");
                return;
            }

            Console.WriteLine("Įveskite pirmąjį skaičių");
            double a = double.Parse(Console.ReadLine());

            Console.WriteLine("Įveskite antrąjį skaičių");
            double b = double.Parse(Console.ReadLine());

            switch (func)
            {
                case 1:
                    Addition(a, b);
                    break;

                case 2:
                    Subraction(a, b);
                    break;

                case 3:
                    Multiplication(a, b);
                    break;

                case 4:
                    Devision(a, b);
                    break;

                default:
                    Console.WriteLine("Problema Operacijose");
                    break;
            }

        }

        // Prints out information needed for the calculator
        private static void Info()
        {
            Console.WriteLine("Skaičiuotuvas");
            Console.WriteLine("-----------------------");
            Console.WriteLine("1): sudėtis (+)");
            Console.WriteLine("2): atimtis (-)");
            Console.WriteLine("3): daugyba (*)");
            Console.WriteLine("4): dalyba  (/)");
            Console.WriteLine("-----------------------");
        }
        private static void Addition (double a, double b) => Console.WriteLine($"{a,0:f} + {b,0:f} = {(double)(a + b),0:f}");
        private static void Subraction (double a, double b) => Console.WriteLine($"{a,0:f} - {b,0:f} = {(double)(a - b),0:f}");
        private static void Multiplication (double a, double b) => Console.WriteLine($"{a,0:f} * {b,0:f} = {(double)(a * b),0:f}");

        private static void Devision (double a, double b)
        {
            try
            {
                Console.WriteLine($"{a,0:f} / {b,0:f} = {(double)(a / b),0:f}");
            }
            catch (Exception)
            {
                Console.WriteLine("Problema su Dalyba");
            }
        }
    }
}