Lab 12 Main

//menu of employees with sorting types and orders (using delegate)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Project_2
{
    class Program
    {
        private static int index = 0;
        static List<Employee> employees = new List<Employee>();
        //public static ArrayList employees = new ArrayList();
        static EmployeeSort employeeSort = new EmployeeSort();
        static EmployeeSortReverse employeeSortReverse = new EmployeeSortReverse();
        public delegate void SortType();
        public static SortType sortType;
        static void Main(string[] args)
        {
            //Employee[] arr = new Employee[]
            //{
            //    new Employee{ID = 1, Salary = 50 },
            //    new Employee{ID = 2, Salary = 10 },
            //    new Employee{ID = 3, Salary = 30}
            //};
            //int result = arr[1].CompareTo(arr[2]);
            //Array.Sort(arr);

            List<string> menuItems = new List<string>() { "New", "Display", "Sort", "Exit" };

            Console.CursorVisible = false;

            while (true)
            {
                string selectedMenuItem = drawMenu(menuItems);
                if (selectedMenuItem == "New")
                {
                    Console.Clear();
                    newEmployee();
                }
                else if (selectedMenuItem == "Display")
                {
                    Console.Clear();
                    displayEmployee();
                }
                else if (selectedMenuItem == "Sort")
                {
                    Console.Clear();
                    sortType = new SortType(sortEmployees);
                    sortType.Invoke();
                }
                else if (selectedMenuItem == "Exit")
                {
                    Environment.Exit(0);
                }
            }
        }

        private static string drawMenu(List<string> items)
        {
            for (int i = 0; i < items.Count; i++)
            {
                if (i == index)
                {
                    Console.BackgroundColor = ConsoleColor.Gray;
                    Console.ForegroundColor = ConsoleColor.Black;
                    Console.WriteLine(items[i]);
                }
                else
                {
                    Console.WriteLine(items[i]);
                }
                Console.ResetColor();
            }

            ConsoleKeyInfo ckey = Console.ReadKey();

            if (ckey.Key == ConsoleKey.DownArrow)
            {
                if (index == items.Count - 1)
                {
                    //index = 0;
                }
                else
                {
                    index++;
                }
            }
            else if (ckey.Key == ConsoleKey.UpArrow)
            {
                if (index <= 0)
                {
                    //index = menuItems.count - 1;
                }
                else
                {
                    index--;
                }
            }
            else if (ckey.Key == ConsoleKey.Enter)
            {
                return items[index];
            }
            else
            {
                return "";
            }

            Console.Clear();
            return "";
        }

        static void newEmployee()
        {
            string name;
            int id, salary;
            Console.WriteLine("Enter employee information.");
            Console.Write("ID: "); id = int.Parse(Console.ReadLine());
            Console.Write("Name: "); name = Console.ReadLine();
            Console.Write("Salary: "); salary = int.Parse(Console.ReadLine());

            Employee e = new Employee(id, name, salary);
            employees.Add(e);
        }

        static void sortEmployees()
        {
            Console.WriteLine("Choose your sorting order:\n1. Ascending\n2. Descending");
            int orderChoice = int.Parse(Console.ReadLine());
            switch (orderChoice)
            {
                case 1:
                    Console.WriteLine("Choose sorting type:\n1. ID\n2. Name\n3. Salary");
                    int choice1 = int.Parse(Console.ReadLine());
                    switch (choice1)
                    {
                        case 1:
                            employeeSort.sortChoice = EmployeeSort.sortBy.ID;
                            break;
                        case 2:
                            employeeSort.sortChoice = EmployeeSort.sortBy.name;
                            break;
                        case 3:
                            employeeSort.sortChoice = EmployeeSort.sortBy.salary;
                            break;
                        default:
                            Console.WriteLine("Error, invalid choice");
                            break;
                    }
                    employees.Sort(employeeSort);
                    break;
                case 2:
                    Console.WriteLine("Choose sorting type:\n1. ID\n2. Name\n3. Salary");
                    int choice2 = int.Parse(Console.ReadLine());
                    switch (choice2)
                    {
                        case 1:
                            employeeSortReverse.sortChoice = EmployeeSortReverse.sortBy.ID;
                            break;
                        case 2:
                            employeeSortReverse.sortChoice = EmployeeSortReverse.sortBy.name;
                            break;
                        case 3:
                            employeeSortReverse.sortChoice = EmployeeSortReverse.sortBy.salary;
                            break;
                        default:
                            Console.WriteLine("Error, invalid choice");
                            break;
                    }
                    employees.Sort(employeeSortReverse);
                    break;
            }
        }

        static void displayEmployee()
        {
            foreach (var employee in employees)
            {
                Console.WriteLine("Employee ID: {0}\nEmployee Name: {1}\nEmployee Salary: {2}\n", employee.ID, employee.name, employee.salary);
            }
            //for (int i = 0; i < employees.Count; i++)
            //{
            //    Console.WriteLine("Employee ID: {0}\nEmployee Name: {1}\nEmployee Salary: {2}\n", ((Employee)employees[i]).ID, ((Employee)employees[i]).name, ((Employee)employees[i]).salary);
            //}
        }
    }
}