namespace list_lab_1
{
    public class myCell {
        public string element;
        public myCell next;
    }

    public class myList {

        public myCell Head = new myCell();

        public string GetList() {
            myCell tmp = Head;
            string str = " ";
            while (tmp.next != null) {
                tmp = tmp.next;
                str = tmp.element + ",";
            }
            return str;
        }

        public int Count (){
            myCell tmp = Head;
            int i = 0;
            while (tmp.next != null) {
                tmp = tmp.next;
                i++;
            }
            return i;
        }

        public myCell Add(string val, myCell pos) {
            myCell tmp = new myCell();
            tmp.element = val;
            tmp.next = pos.next;
            pos.next = tmp;
            return tmp;
        }

        public void Remove(myCell pos) {
            myCell tmp = Head;
            while (tmp.next != pos) {
                tmp = tmp.next;
            }
            tmp.next = tmp.next.next;
        }

        public void Move(myCell pos, myCell after) {
            Remove(pos);
            Add(pos.element, after);
        }

        public class Program {
            static void Main(string[] args)
            {
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.WriteLine("The list of pets");
                Console.ResetColor();

                Console.WriteLine("Please enter the appropriate number where:" +
                    "\n 1 - adding one new element to the list;" +
                    "\n 2 - removing one element to the list;" +
                    "\n 3 - moving one element in the list;" +
                    "\n 4 - showing all the elements of the list;" +
                    "\n 5 - counting all the elements of the list.");

                myList List = new myList();
                myCell cell = new myCell();
                myCell cell1 = new myCell();

                while (true)
                {
                    int choice = Convert.ToInt32(Console.ReadLine());
                    switch (choice)
                    {
                        case 1:
                            Console.WriteLine("Please, input the name of the pet");
                            if (Convert.ToInt32(List.GetList()) == 1)
                            {
                                List.Add(Console.ReadLine(), List.Head);
                            }
                            else
                            {
                                List.Add(Console.ReadLine(), cell);
                            }
                            break;

                        case 2:
                            List.Remove(cell1);
                            break;

                        case 3:
                            List.Move(cell, cell1);
                            break;

                        case 4:
                            Console.WriteLine(List.GetList());
                            break;

                        case 5:
                            Console.WriteLine(Convert.ToString(List.Count()));
                            break;

                        default:
                            Console.WriteLine("unknown command; try again");
                            break;
                    }
                }
                Console.ReadKey();
            }
        }
    }
}