// Using Directives
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Text.RegularExpressions;

namespace SalesCalc
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());

            string txtSaleAmt;
            int txtNumSales = 0;
            double addingSales;
            double txtTtlSales = 0.00;
            double txtAvgSale;
            double txtCommDue = 0.00;
            double txtCommRate = 0.035;
            bool txtBonus = false;
            double txtBonusAmt = 0.00;
            double ttlCommDue;

            Console.WriteLine("enter amt");
            txtSaleAmt = Console.ReadLine();

            //Validation to perform
            if (validateInput(txtSaleAmt))
            {
                // convert string
                addingSales = Convert.ToInt32(Convert.ToDouble(txtSaleAmt));
                Console.WriteLine("amount is {0}", txtSaleAmt);
                txtTtlSales += addingSales;
                txtNumSales++;
                Console.WriteLine(" totalsales = {0}, adding = {1}, number sales = {2}", txtTtlSales, addingSales, txtNumSales);
                txtAvgSale = (txtTtlSales / txtNumSales);
                Console.WriteLine("average is {0}", txtAvgSale);
                if (txtTtlSales <= 500.00)
                {
                    txtCommRate = 0.035;
                }
                else if (txtTtlSales <= 999.99)
                {
                    txtCommRate = 0.04;
                }
                else
                {
                    txtCommRate = 0.05;
                }

                txtCommDue += (txtCommRate * addingSales);
                Console.WriteLine("commission due is {0} and rate is {1} and average is {2}", txtCommDue, txtCommRate, txtAvgSale);

                if (txtCommRate == 0.04)
                {
                    txtBonus = true;
                    txtBonusAmt = 25.00;
                    ttlCommDue = (txtCommDue + txtBonusAmt);
                }

                else if (txtCommRate == 0.05)
                {
                    txtBonus = true;
                    txtBonusAmt = 200.00;
                    ttlCommDue = (txtCommDue + txtBonusAmt);
                }
                else
                {
                    txtBonus = false;
                    ttlCommDue = txtCommDue;
                }
                txtCommDue += txtBonusAmt;
                Console.WriteLine("commission due is {0}", txtCommDue);

            }
        }

        // Function to Test for Positive Number both Integer & Real

        private static bool validateInput(string s)
        {
            Regex r = new Regex(@"^\d+(\.\d{1,2})?$");
            return r.IsMatch(s);
        }

    }

}