using System;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        Aquarium aquarium = new Aquarium();

        aquarium.Work();
    }
}

class Aquarium
{
    private static Random _random = new Random();

    private List<Fish> _fishTypes;
    private List<Fish> _fishInAquarium;
    private int _maxPlace = 6;

    public Aquarium()
    {
        _fishTypes = new List<Fish>() { new Fish("Гуппи", 0, 5), new Fish("Акара", 0, 10), new Fish("Золотая", 0, 15), new Fish("Немо", 0, 20) };
        _fishInAquarium = new List<Fish>();
    }

    public void Work()
    {
        const string AddFishCommand = "1";
        const string RemoveFishCommand = "2";
        const string ExitCommand = "3";

        string userInput;
        bool isWorking = true;

        while (isWorking)
        {
            ShowAllFish();

            Console.SetCursorPosition(0, 10);
            Console.WriteLine($"{AddFishCommand})Добавить рыбку.\n{RemoveFishCommand})Убрать рыбку.\n{ExitCommand})Выйти из программы.");
            userInput = Console.ReadLine();

            Console.Clear();

            switch (userInput)
            {
                case AddFishCommand:
                    AddFish();
                    break;

                case RemoveFishCommand:
                    RemoveFish();
                    break;

                case ExitCommand:
                    isWorking = false;
                    break;
            }

            AgeingFish();
        }
    }

    public void AddFish()
    {
        if (IsFull())
        {
            Fish fish = _fishTypes[_random.Next(_fishTypes.Count - 1)].Clone();
            _fishInAquarium.Add(fish);
        }
    }

    public bool IsFull()
    {
        if (_fishInAquarium.Count >= _maxPlace)
        {
            Console.WriteLine("Аквариум переполнен.");
            return false;
        }
        else
        {
            Console.WriteLine($"Еще есть место для {(_maxPlace - 1) - _fishInAquarium.Count} рыбок.");
            return true;
        }
    }


    public void RemoveFish()
    {
        if (SearchFish(out Fish fish))
        {
            _fishInAquarium.Remove(fish);
        }

        Console.Clear();
    }

    private bool SearchFish(out Fish fish)
    {
        ShowAllFish();

        Console.WriteLine("Какую рыбку вы хотите убрать?");

        int userInput = ConvertToInt();
        int summand = 1;

        for (int i = 0; i < _fishInAquarium.Count; i++)
        {
            if (i + summand == userInput)
            {
                fish = _fishInAquarium[i];
                return true;
            }
        }

        fish = null;

        Console.WriteLine("Рыбка с таким номером не найдена не найдена. Введите любую клавишу.");
        Console.ReadKey();

        return false;
    }

    public void AgeingFish()
    {
        Fish fishRemove = null;

        foreach (Fish fish in _fishInAquarium)
        {
            if (fish.Age >= fish.YearsOfLife)
            {
                fishRemove = fish;
                Console.WriteLine($"К сожалению погибла рыбка {fishRemove.Name}");
            }
            else
            {
                fish.AddAge();
            }
        }


        _fishInAquarium.Remove(fishRemove);
    }

    public void ShowAllFish()
    {
        for (int i = 0; i < _fishInAquarium.Count; i++)
        {
            Console.WriteLine($"{i + 1}){_fishInAquarium[i].Name}|Осталось жить {_fishInAquarium[i].YearsOfLife - _fishInAquarium[i].Age} лет.");
        }
    }

    private int ConvertToInt()
    {
        int templateNumber;
        string userInput = string.Empty;

        while (int.TryParse(userInput, out templateNumber) == false)
        {
            userInput = Console.ReadLine();
        }

        return templateNumber;
    }
}

class Fish
{
    public Fish(string name, int age, int yearsOfLife)
    {
        Name = name;
        Age = age;
        YearsOfLife = yearsOfLife;
    }

    public string Name { get; private set; }
    public int Age { get; private set; }
    public int YearsOfLife { get; private set; }

    public void AddAge()
    {
        Age++;
    }

    public Fish Clone()
    {
        return new Fish(Name, Age, YearsOfLife);
    }
}