using System;

namespace ConsoleApp28
{
    internal class Program
    {
        static void Main(string[] args)
        {
            const string CommandAddDossier = "1";
            const string CommandShowDossier = "2";
            const string CommandDeleteDossier = "3";
            const string CommandSearchName = "4";
            const string CommandExitProgram = "5";

            string[] names = new string[0];
            string[] positions = new string[0];
            string userInput;
            bool isWork = true;

            while (isWork)
            {
                Console.WriteLine("        МЕНЮ");
                Console.WriteLine(
                    $" {CommandAddDossier}) Добавить досье.\n" +
                    $" {CommandShowDossier}) Показать досье.\n" +
                    $" {CommandDeleteDossier}) Удалить досье.\n" +
                    $" {CommandSearchName}) Поиск по фамилии.\n" +
                    $" {CommandExitProgram}) Выход.");
                userInput = Console.ReadLine();
                Console.Clear();

                switch (userInput)
                {
                    case CommandAddDossier:
                        AddDossier(ref names, ref positions);
                        break;
                    case CommandShowDossier:
                        ShowDossier(names, positions);
                        break;
                    case CommandDeleteDossier:
                        DeleteDossier(ref names, ref positions);
                        break;
                    case CommandSearchName:
                        SearchName(names, positions);
                        break;
                    case CommandExitProgram:
                        isWork = false;
                        break;
                }
            }
        }

        static void AddElement(ref string[] array, string text)
        {
            Console.Write(text);
            string userInput = Console.ReadLine();
            string[] temporaryArray = new string[array.Length + 1];

            for (int i = 0; i < array.Length; i++)
            {
                temporaryArray[i] = array[i];
            }

            temporaryArray[temporaryArray.Length - 1] = userInput;
            array = temporaryArray;
        }

        static void AddDossier(ref string[] names, ref string[] positions)
        {
            AddElement(ref names, "Укажите ваше ФИО :");
            AddElement(ref positions, "Укажите вашу должность :");
        }

        static void ShowDossier(string[] names, string[] positions)
        {
            for (int i = 0; i < names.Length; i++)
            {
                ShowElement(i, names[i], positions[i]);
            }
        }

        static void DeleteElement(ref string[] array, int number)
        {
            string[] tempArray = new string[array.Length - 1];
            int index = number - 1;

            for (int i = 0; i < index; i++)
            {
                tempArray[i] = array[i];
            }
            for (int i = index; i < tempArray.Length; i++)
            {
                tempArray[i] = array[i + 1];
            }

            array = tempArray;
        }

        static void DeleteDossier(ref string[] names, ref string[] positions)
        {
            Console.Write("Укажите номер досье которое нужно удалить : ");
            string userInput = Console.ReadLine();
            bool isNumber = int.TryParse(userInput, out int numberValue);

            if (isNumber && numberValue <= names.Length && numberValue > 0)
            {
                DeleteElement(ref names, numberValue);
                DeleteElement(ref positions, numberValue);
                Console.WriteLine($"Досье {userInput} удалено.");
            }
            else
            {
                Console.WriteLine($"Досье {userInput} нету.");
            }
        }

        static void SearchName(string[] names, string[] positions)
        {
            Console.Write("Введите фамилию : ");
            string userInput = Console.ReadLine();
            string[] nameElements;
            bool isFound = false;

            for (int i = 0; i < names.Length; i++)
            {
                nameElements = names[i].Split(' ');

                for (int j = 0; j < nameElements.Length; j++)
                {
                    if (nameElements[j].ToLower() == userInput.ToLower())
                    {
                        Console.Write("Найден : ");
                        ShowElement(i, names[i], positions[i]);
                        isFound = true;
                    }
                }
            }

            if (isFound == false)
            {
                Console.WriteLine("Ничего не найдено.");
            }
        }

        static void ShowElement(int index, string name, string position)
        {
            Console.WriteLine($"{index + 1}) {name} - {position}.");
        }
    }
}