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

namespace Kingston_Italiana
{
    class Program
    {
        static void Main(string[] args)
        {
            Menu();
        }

        public static void Menu()
        {

            // Main Menu
            char ch;
            string Title = "**KINGSTON ITALANIA**\n\n";

            Console.SetCursorPosition((Console.WindowWidth - Title.Length) / 3, Console.CursorTop);
            Console.WriteLine(Title);

            Console.WriteLine("Welcome to Kingston Italiana. Here are your choices:\n\n");

            Console.WriteLine("1 - Employee Details");

            Console.WriteLine("\n2 - Pay Slip");

            Console.WriteLine("\n3 - Help");

            Console.WriteLine("\n4 - Exit Program");

            Console.WriteLine("\n\nPlease select a choice from above using your keyboard:");
            ch = char.Parse(Console.ReadLine());

            switch (ch)
            {
                // Employee Details
                case '1':
                    string EmployeeName;
                    string JobTitle;
                    int Age;
                    DateTime Date;
                    int HoursWorked;
                    int OverTime;
                    double OverTimePay;
                    double HourlyRate = 0;
                    double Pay;
                    double GrossPay;
                    double TAX = 0;
                    double NationalInsurance = 0;
                    double NetPay;
                    {
                        Console.Clear();
                    }
                    // Title
                    string Title2 = "**EMPLOYEE DETAILS**";

                    Console.SetCursorPosition((Console.WindowWidth - Title2.Length) / 4, Console.CursorTop);
                    Console.WriteLine(Title2);

                    // Employee Name
                    Console.WriteLine("\n\nEnter Employee Name:");
                    EmployeeName = Console.ReadLine();

                    // Job Title
                    Console.WriteLine("\nEnter Job Title:");
                    JobTitle = Console.ReadLine();

                    if (JobTitle == "apprentice" && JobTitle == "Apprentice" && JobTitle == "APPRENTICE")
                    {
                        HourlyRate = 2.68;
                    }

                    else
                    // Age
                    Console.WriteLine("\nEnter Age of Employee:");
                    Age = Int32.Parse(Console.ReadLine());

                    if (Age >= 16 && Age < 18)
                    {
                        HourlyRate = 3.72;
                    }
                    else if (Age >= 18 && Age <= 20)
                    {
                        HourlyRate = 5.03;
                    }
                    else if (Age >= 21)
                    {
                        HourlyRate = 6.31;
                    }

                    // Date
                    Console.WriteLine("\nEnter the current Date (DD/MM/YYYY):");
                    Date = DateTime.Parse(Console.ReadLine());

                    // Hours Worked
                    Console.WriteLine("\nEnter amount of Hours worked during the week:");
                    HoursWorked = Int32.Parse(Console.ReadLine());

                    if (HoursWorked > 56)
                    {
                        OverTime = HoursWorked - 56;
                    }

                    else
                    {
                        OverTime = 0;
                    }
                        OverTimePay = (OverTime * HourlyRate);
                        Pay = (HoursWorked * HourlyRate) + (OverTime * HourlyRate);
                        GrossPay = (Pay * 52); // Calculate Pay for a Year

                    if (GrossPay <= 8632)
                    {
                        NationalInsurance = GrossPay * 0;
                    }
                    else if (GrossPay > 8632 && GrossPay <= 50000)
                    {
                        NationalInsurance = GrossPay * 0.12;
                    }
                    else if (GrossPay > 50000)
                    {
                        NationalInsurance = GrossPay * 0.2;
                    }
                    if (GrossPay <= 12500)
                    {
                        TAX = GrossPay * 0;
                    }
                    else if (GrossPay > 12501 && GrossPay <= 50000)
                    {
                        TAX = GrossPay * 0.2;
                    }
                    else if (GrossPay >= 50001 && GrossPay <= 150000)
                    {
                        TAX = GrossPay * 0.4;
                    }
                    NetPay = GrossPay - (TAX - NationalInsurance);

                    // Go back to Main Menu
                    Console.WriteLine("\nPress any key to go back to the Main Menu.");
                    Console.ReadKey();
                    Console.Clear();
                    Menu();

                    break;
                case '2':
                    {
                        Console.Clear();
                    }

                    // Go back to Main Menu
                    Console.WriteLine("\n\nPress any key to go back to the Main Menu.");
                    Console.ReadKey();
                    Console.Clear();
                    Menu();
                    break;

                // Help Page
                case '3':
                    {
                        Console.Clear();
                    }
                    string Title3 = "**HELP PAGE**\n\n";
                    Console.SetCursorPosition((Console.WindowWidth - Title3.Length) / 2, Console.CursorTop);
                    Console.WriteLine(Title3);

                    Console.WriteLine("This is the help page of Kingston Italiana. This program is about calculating the pay of an Employee. The first thing to do in this program is to input the Employee Details for calculating the pay. After that a PaySlip will be generated based upon the details inputted upon the Employee.\n\n");
                    Console.WriteLine("Ultimately, this program will output the Employee Details, Gross Pay, TAX, National Insurance and Net Pay.\n");

                    // Go back to Main Menu
                    Console.WriteLine("\n\nPress any key to go back to the Main Menu.");
                    Console.ReadKey();
                    Console.Clear();
                    Menu();

                    break;

                // Closing the Programming
                case '4':
                    Environment.Exit(0);

                    break;
            }
        }
    }
}