using System;

using System.Collections.Generic;

​

namespace TaskManagementApp

{

    class Program

    {

        static void Main(string[] args)

        {

            var app = new TaskManagementApp();

            app.StartApp();

        }

    }

​

    public class TaskManagementApp

    {

        private List<Task> tasksList;

        private List<User> usersList;

​

        public void StartApp()

        {

            InitializeUsers();

            InitializeCards();

​

            ShowMainMenu();

        }

​

        private void ShowMainMenu()

        {

            while (true)

            {

                Console.WriteLine("Menu \n 1. Create task \n 2. Change task status \n 3. Show all tasks");

​

                var key = Console.ReadKey().KeyChar;

​

                switch (key)

                {

                    case '1':

                        CreateTask();

                        break;

​

                    case '2':

                        ChangeTaskStatus();

                        break;

​

                    case '3':

                        ShowAllTasks();

                        break;

​

                    default:

                        return;

                }

            }

        }

​

        private void ChangeTaskStatus()

        {

            ShowAllTasks();

​

            Console.WriteLine("Input task number:");

            var numberStr = Console.ReadLine();

​

            int taskNumber;

            if(!int.TryParse(numberStr, out taskNumber))

                Console.WriteLine("Incorrect task number!");

​

            ShowAllStatuses();

​

            Console.WriteLine("Input status number:");

            var statusStr = Console.ReadLine();

​

            int statusNumber;

            if (!int.TryParse(statusStr, out statusNumber))

                Console.WriteLine("Incorrect status number!");

​

            tasksList[taskNumber].TaskStatus = (TaskStatus)statusNumber;

​

            ShowAllTasks();

​

        }

​

        private void ShowAllStatuses()

        {

            int i = 0;

            foreach (var enumValue in Enum.GetValues(typeof(TaskStatus)))

                Console.WriteLine($"{i++}. {enumValue}");

        }

​

        private void ShowAllTasks()

        {

            Console.WriteLine("Number |    Title     | Status |    Decsription");

​

            tasksList.ForEach(t => Console.WriteLine($"{tasksList.IndexOf(t)} |   {t.Title}   | {t.TaskStatus} | {t.Description} "));

        }

​

        private void CreateTask()

        {

            Console.WriteLine("Input task title:");

            var title = Console.ReadLine();

​

            Console.WriteLine("Input task description:");

            var descr = Console.ReadLine();

​

            tasksList.Add(new Task { Title = title, Description = descr });

        }

​

        private void InitializeUsers()

        {

            usersList = new List<User>

            {

                new User{Name = "student1" },

                new User{Name = "student2" },

                new User{Name = "teacher" }

            };

        }

​

        private void InitializeCards()

        {

            tasksList = new List<Task>

            {

                new Task{ Title = "Arrays", Description= "create array", TaskStatus = TaskStatus.ToDo },

                new Task{ Title = "Collections", Description= "Create custom colelction.", TaskStatus = TaskStatus.ToDo },

                new Task{ Title = "Inheritance", Description= "Implement ingheritance", TaskStatus = TaskStatus.ToDo }

            };

        }

​

​

    }

​

​

    public class Task

    {

        public string Title { get; set; }

        public string Description { get; set; }

​

        public TaskStatus TaskStatus { get; set; }

    }

​

    public class User

    {

        public string Name { get; set; }

    }

​

    public enum TaskStatus

    {

        ToDo,

        OnTeacher,

        OnStudent,

        Done

    }

​

​

}

​