досье

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics.CodeAnalysis;
using System.Dynamic;
using System.Globalization;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
namespace CSLight
{
    class Program
    {
        static void Main(string[] args)
        {
            bool exit = false;
            int surnameSearch = 0;
            string[] menu = { "1. Добавить досье.", "2. Вывести досье.", "3. Удалить досье.", "4. Поиск по фамилии.", "5. Выход." };
            string[] fullNames = { "Иванов Иван Иванович", "Шевцов Глеб Егорыч" };
            string[] positions = { "Директор", "Коллектор" };
            Console.CursorVisible = false;
            while (!exit)
            {
                DrawMenu(surnameSearch, menu);
                string selectMenuItems = ChangeDirection(ref surnameSearch, menu);
                switch (selectMenuItems)
                {
                    case "1. Добавить досье.":
                        string newWorker = "";
                        string positonWorker = "";
                        ClearConsole();
                        Console.Write("Ведите ФИО нового сотрудника:");
                        newWorker = Console.ReadLine();
                        IncreaseDossier(ref fullNames, newWorker);
                        Console.Write("Ведите должность сотрудника:");
                        positonWorker = Console.ReadLine();
                        IncreaseDossier(ref positions, positonWorker);
                        ClearConsole();
                        break;
                    case "2. Вывести досье.":
                        DrawaAllDossier(fullNames, positions);
                        break;
                    case "3. Удалить досье.":
                        bool verificationWasSuccessful = false;
                        int dossierNumber = 0;
                        ClearConsole();
                        CheckDossierNumber(fullNames, positions, ref dossierNumber, ref verificationWasSuccessful);
                        if (verificationWasSuccessful)
                        {
                            DecreaseDossier(ref fullNames, dossierNumber);
                            DecreaseDossier(ref positions, dossierNumber);
                            ClearConsole();
                        }
                        break;
                    case "4. Поиск по фамилии.":
                        ClearConsole();
                        int hitCoincidence = 0;
                        string command;
                        Console.Write("Введите фамилию:");
                        command = Console.ReadLine();
                        SearchSurname(fullNames, positions, command, ref hitCoincidence);
                        break;
                    case "5. Выход.":
                        exit = true;
                        break;
                }
            }
        }

        static void CheckDossierNumber(string[] array, string[] array1, ref int dossierNumber, ref bool verificationWasSuccessful)
        {
            if (array.Length == 0)
            {
                DrawLabels("Нет досье в списке.");
            }
            else
            {
                DrawaAllDossier(array, array1);
                Console.SetCursorPosition(0, 0);
                Console.Write("Досье для удаления:");
                dossierNumber = Convert.ToInt32(Console.ReadLine());
                if (dossierNumber > array.Length || dossierNumber <= 0)
                {
                    ClearConsole();
                    DrawLabels("Нет досье с таким номером");
                }
                else
                {
                    verificationWasSuccessful = true;
                    ReturnIndexArray(array, ref dossierNumber);
                }
            }
        }

        static int ReturnIndexArray(string[] array, ref int index)
        {
            return index;
        }

        static void DrawLabels(string text)
        {
            Console.SetCursorPosition(30, 0);
            Console.Write(text);
        }

        static void SearchSurname(string[] array, string[] array1, string command, ref int hitCoincidence)
        {
            for (int i = 0; i < array.Length; i++)
            {
                if (array[i].StartsWith(command))
                {
                    Console.SetCursorPosition(30, i);
                    Console.WriteLine($"{i + 1}) {array[i]} - {array1[i]}");
                    hitCoincidence++;
                }
            }
            if (hitCoincidence == 0)
            {
                DrawLabels("Cовпадений нет.");
            }
        }

        static string[] IncreaseDossier(ref string[] array, string value)
        {
            string[] temp = new string[array.Length + 1];
            for (int i = 0; i < array.Length; i++)
            {
                temp[i] = array[i];
            }
            temp[temp.Length - 1] = value;
            array = temp;
            return array;
        }

        static string[] DecreaseDossier(ref string[] array, int value)
        {
            string[] temp = new string[array.Length - 1];
            for (int i = 0, j = 0; i < array.Length; i++)
            {
                if (i == (value - 1))
                    continue;
                temp[j] = array[i];
                j++;
            }
            array = temp;
            return array;
        }

        static void DrawaAllDossier(string[] array1, string[] array2)
        {
            if (array1.Length == 0)
            {
                DrawLabels("Нет досье в списке.");
            }
            else
            {
                for (int i = 0; i < array1.Length; i++)
                {
                    Console.SetCursorPosition(30, i);
                    Console.WriteLine($"{i + 1}) {array1[i]} - {array2[i]}");
                }
            }
        }

        static void DrawMenu(int surnameSearch, string[] items)
        {
            Console.SetCursorPosition(0, 0);
            for (int i = 0; i < items.Length; i++)
            {
                if (i == surnameSearch)
                {
                    Console.BackgroundColor = ConsoleColor.Gray;
                    Console.ForegroundColor = ConsoleColor.Black;
                    Console.WriteLine(items[i]);
                }
                else
                {
                    Console.WriteLine(items[i]);
                }
                Console.ResetColor();
            }
        }

        static string ChangeDirection(ref int surnameSearch, string[] items)
        {
            ConsoleKeyInfo key = Console.ReadKey();
            switch (key.Key)
            {
                case ConsoleKey.UpArrow:
                    if (surnameSearch <= 0)
                    {
                        surnameSearch = items.Length - 1;
                        DrawMenu(surnameSearch, items);
                    }
                    else
                    {
                        surnameSearch--;
                        DrawMenu(surnameSearch, items);
                    }
                    break;
                case ConsoleKey.DownArrow:
                    if (surnameSearch == items.Length - 1)
                    {
                        surnameSearch = 0;
                        DrawMenu(surnameSearch, items);
                    }
                    else
                    {
                        surnameSearch++;
                        DrawMenu(surnameSearch, items);
                    }
                    break;
                case ConsoleKey.Enter:
                    {
                        return items[surnameSearch];
                    }
            }
            return "";
        }

        static void ClearConsole()
        {
            Console.Clear();
        }
    }
}