using System;
using System.Collections.Generic;

namespace Homework44
{
    class Program
    {
        static void Main(string[] args)
        {
            Dispatcher dispatcher = new Dispatcher();
            dispatcher.IsWork();
        }
    }

    class Dispatcher
    {
        private int _wagonCapacity = 24;
        private int _minPassengers = 50;
        private int _maxPassengers = 201;

        private List<Train> _trains = new List<Train>();
        private TrainRouteGenerator _routeGenerator = new TrainRouteGenerator();

        public void IsWork()
        {
            const string CommandCreateTrain = "go";
            const string CommandExitMenu = "exit";
            const string CommandShowTrains = "show";

            bool isWork = true;

            while (isWork)
            {
                ShowShortTrainInfo();

                Console.WriteLine("\nВы находитесь в меню создания поездов");
                Console.WriteLine($"Чтобы создать поезд введите {CommandCreateTrain}");
                Console.WriteLine($"Чтобы показать список поездов введите {CommandShowTrains}");
                Console.WriteLine($"Чтобы выйти из меню введите {CommandExitMenu}");
                Console.Write("Выберите действие: ");

                string userInput = Console.ReadLine();

                switch (userInput)
                {
                    case CommandCreateTrain:
                        CreateTrain();
                        break;

                    case CommandShowTrains:
                        ShowTrainInformation();
                        break;

                    case CommandExitMenu:
                        isWork = ExitProgram();
                        break;

                    default:
                        Console.WriteLine("Некорректный ввод, попробуйте еще раз.");
                        break;
                }

                Console.ReadKey();
                Console.Clear();
            }
        }

        private void CreateTrain()
        {
            string direction = _routeGenerator.GetPath();
            int passengerCount = AccidentalProvider.GetRandomPassengerCount(_minPassengers, _maxPassengers);

            if (passengerCount == -1)
            {
                Console.WriteLine("Продажа билетов отменена.");
                return;
            }

            List<Wagon> wagons = CreateWagons(passengerCount);
            Train train = new Train(direction, passengerCount, wagons);

            Console.WriteLine("\nИнформация о созданном поезде:");
            train.ShowInfo();

            _trains.Add(train);
        }

        private List<Wagon> CreateWagons(int passengerCount)
        {
            List<Wagon> wagons = new List<Wagon>();

            int remainingPassengers = passengerCount;

            while (remainingPassengers > 0)
            {
                int passengersForThisWagon = Math.Min(_wagonCapacity, remainingPassengers);
                wagons.Add(new Wagon(_wagonCapacity, passengersForThisWagon));
                remainingPassengers -= passengersForThisWagon;
            }

            return wagons;
        }

        private void ShowTrainInformation()
        {
            if (_trains.Count == 0)
            {
                Console.WriteLine("Поездов пока нет.");
                return;
            }

            Console.WriteLine("Список поездов:");

            for (int i = 0; i < _trains.Count; i++)
            {
                Console.WriteLine($"Поезд {i + 1}: {_trains[i].Direction}, " +
                $"Пассажиров: {_trains[i].PassengerCount}, Вагонов: {_trains[i].WagonCount}");
            }
        }

        private bool ExitProgram()
        {
            Console.WriteLine("Вы вышли из программы!");
            return false;
        }

        private void ShowShortTrainInfo()
        {
            if (_trains.Count == 0)
            {
                Console.WriteLine("Поездов пока нет.");
                return;
            }

            Console.WriteLine("Существующие поезда:");

            for (int i = 0; i < _trains.Count; i++)
            {
                Console.WriteLine($"Поезд {i + 1}: {_trains[i].Direction}," +
                $" Пассажиров: {_trains[i].PassengerCount}, Вагонов: {_trains[i].WagonCount}");
            }
        }
    }

    class AccidentalProvider
    {
        private static Random s_random = new Random();

        public static int GetRandomPassengerCount(int minPassengers, int maxPassengers)
        {
            return s_random.Next(minPassengers, maxPassengers);
        }
    }

    class TrainRouteGenerator
    {
        private string[] _locations = new string[]
        {
           "Москва", "Санкт-Петербург", "Калуга", "Тверь", "Ярославль", "Краснодар",
           "Ростов", "Вологда", "Нижний Новгород", "Владивосток", "Екатеринбург",
           "Самара", "Сочи", "Белгород", "Брянск", "Сергиев Посад", "Козельск", "Иваново"
        };

        public string GetPath()
        {
            string departure = GetRandomLocation();
            string arrival = GetDifferentLocation(departure);

            return $"{departure} - {arrival}";
        }

        private string GetRandomLocation()
        {
            return _locations[AccidentalProvider.GetRandomPassengerCount(0, _locations.Length - 1)];
        }

        private string GetDifferentLocation(string excludeLocation)
        {
            string arrival;

            do
            {
                arrival = GetRandomLocation();
            } while (arrival == excludeLocation);

            return arrival;
        }
    }

    class Train
    {
        private List<Wagon> _wagons;
        public Train(string direction, int passengerCount, List<Wagon> wagons)
        {
            Direction = direction;
            PassengerCount = passengerCount;
            _wagons = wagons;
        }

        public string Direction { get; private set; }
        public int PassengerCount { get; private set; }
        public int WagonCount => _wagons.Count;

        public void ShowInfo()
        {
            Console.WriteLine($"Направление: {Direction}");
            Console.WriteLine($"Количество пассажиров: {PassengerCount}");
            Console.WriteLine($"Количество вагонов: {WagonCount}");
            Console.WriteLine("Информация по вагонам:");

            for (int i = 0; i < _wagons.Count; i++)
            {
                Console.WriteLine($"  Вагон {i + 1}: Занято мест: {_wagons[i].OccupiedSeats}");
            }
        }
    }

    class Wagon
    {
        public Wagon(int capacity, int occupiedSeats)
        {
            Capacity = capacity;
            OccupiedSeats = occupiedSeats;
        }

        public int Capacity { get; private set; }
        public int OccupiedSeats { get; private set; }
    }
}