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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 = true;
            int surnameSearch = 0;
            string[] menu = { "1. Добавить досье.", "2. Вывести досье.", "3. Удалить досье.", "4. Поиск по фамилии.", "5. Выход." };
            string[] fullName = { "Иванов Иван Иванович", "Шевцов Глеб Егорыч" };
            string[] position = { "Директор", "Коллектор" };
            string newWorker = "";
            string positonWorker = "";
            string command;
            int dossierNumber;
            int hitCoincidence = 0;
            Console.CursorVisible = false;
            while (exit)
            {
                Console.SetCursorPosition(0, 0);
                string selectMenuItems = DrawMenu(ref surnameSearch, menu);
                switch (selectMenuItems)
                {
                    case "1. Добавить досье.":
                        Console.Write("Ведите ФИО нового сотрудника:");
                        newWorker = Console.ReadLine();
                        IncreaseDossier(ref fullName, newWorker);
                        Console.Write("Ведите должность сотрудника:");
                        positonWorker = Console.ReadLine();
                        IncreaseDossier(ref position, positonWorker);
                        Console.Clear();
                        break;
                    case "2. Вывести досье.":
                        Console.Clear();
                        DrawaAllDossier(fullName, position);
                        break;
                    case "3. Удалить досье.":
                        Console.Clear();
                        if (fullName.Length == 0)
                        {
                            DrawLabels("Нет досье в списке.");
                        }
                        else
                        {
                            DrawaAllDossier(fullName, position);
                            Console.SetCursorPosition(0, 0);
                            Console.Write("Досье для удаления:");
                            dossierNumber = Convert.ToInt32(Console.ReadLine());
                            if(dossierNumber > fullName.Length)
                            {
                                DrawLabels("Нет досье с таким номером");
                            }
                            else
                            {
                                DecreaseDossier(ref fullName, ref dossierNumber);
                                DecreaseDossier(ref position, ref dossierNumber);
                                Console.Clear();
                            }
                        }
                        break;
                    case "4. Поиск по фамилии.":
                        Console.Clear();
                        Console.Write("Введите фамилию:");
                        command = Console.ReadLine();
                        SearchSurname(fullName, position, command, ref hitCoincidence);
                        break;
                    case "5. Выход.":
                        exit = false;
                        break;
                }
            }
        }
        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($"{i + 1}) {array[i]} - {array1[i]}");
                    hitCoincidence++;
                }
            }
            if(hitCoincidence == 0)
            {
                DrawLabels("Cовпадений нет.");
            }
        }
        static string[] IncreaseDossier(ref string[] array, string value)
        {
            string[] temp = new string[array.Length + 1];
            for (int i = 0; i < array.Length; i++)
            {
                temp[i] = array[i];
            }
            temp[temp.Length-1] = value;
            array = temp;
            return array;
        }
        static string[] DecreaseDossier(ref string[] array, ref int value)
        {
                string[] temp = new string[array.Length - 1];
                for (int i = 0, j = 0; i < array.Length; i++)
                {
                    if (i == (value - 1))
                        continue;
                    temp[j] = array[i];
                    j++;
                }
                array = temp;
                return array;
        }
        static void DrawaAllDossier(string[]arra1, string[]array2)
        {
            if (arra1.Length == 0)
            {
                DrawLabels("Нет досье в списке.");
            }
            else
            {
                for (int i = 0; i < arra1.Length; i++)
                {
                    Console.SetCursorPosition(30, i);
                    Console.WriteLine($"{i + 1}) {arra1[i]} - {array2[i]}");
                }
            }
        }
        static string DrawMenu(ref int surnameSearch, string[] items)
        {
            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();
            }
            ConsoleKeyInfo ckey = Console.ReadKey();
            if (ckey.Key == ConsoleKey.DownArrow)
            {
                if (surnameSearch == items.Length - 1)
                {
                    surnameSearch = 0;
                }
                else
                {
                    surnameSearch++;
                }
            }
            else if (ckey.Key == ConsoleKey.UpArrow)
            {
                if (surnameSearch <= 0)
                {
                    surnameSearch = items.Length - 1;
                }
                else
                {
                    surnameSearch--;
                }
            }
            else if (ckey.Key == ConsoleKey.Enter)
            {
                return items[surnameSearch];
            }
            else
            {
                Console.Clear();
            }
            Console.Clear();
            return "";
        }
    }
}