5.5

using System;

namespace FifthProject
{
    class Program
    {
        static void Main(string[] args)
        {
            Aquarium aquarium = new Aquarium();
            UIRender render = new UIRender();
            Renderer renderer = new Renderer();

            while (true)
            {
                renderer.Render(aquarium.Height, aquarium.Width, aquarium.Fishes);
                aquarium.FishMovement();

                Console.SetCursorPosition(0, aquarium.Height);
                render.ShowMenu();

                render.RenderFishList(aquarium.Fishes);

                Console.WriteLine($"{aquarium.Fishes.Length}/{aquarium.Size}");

                int menu = Convert.ToInt32(Console.ReadLine());
                switch (menu)
                {
                    case 1:
                        if (aquarium.Size == aquarium.Fishes.Length)
                        {
                            Console.WriteLine("Аквариум полон");
                        }
                        else
                        {
                            aquarium.AddNewFish();
                        }
                        break;
                    case 2:
                        if (aquarium.Fishes.Length == 0)
                        {
                            Console.WriteLine("Аквариум пуст");
                        }
                        else
                        {
                            Console.WriteLine("Какую рыбку удалить?");
                            int id = Convert.ToInt32(Console.ReadLine());
                            aquarium.DeleteFish(id);
                        }
                        break;
                }
                aquarium.FishLive();
                Console.Clear();
            }
        }
    }

    class UIRender
    {
        public void RenderFishList(Fish[] fishes)
        {
            for (int i = 0; i < fishes.Length; i++)
            {
                Console.WriteLine($"Рыбка номер {i} - {fishes[i].Name}. {fishes[i].Age}/{fishes[i].MaxAge}. {fishes[i].Appearance}");
            }
        }
        public void ShowMenu()
        {
            Console.WriteLine($"1. Добавить рыбку в аквариум\n" +
                              $"2. Вытащить рыбку из аквариума\n" +
                              $"3. Ждать");
        }
    }

    class Renderer
    {
        public void Render(int width, int height, Fish[] fishes)
        {
            for (int i = 0; i < width; i++)
            {
                for (int j = 0; j < height; j++)
                {
                    if (i == 0 || i == width - 1) Console.Write("#");
                    else if (j == 0 || j == height - 1) Console.Write("#");
                    else Console.Write(" ");
                }
                Console.WriteLine();
            }
            for (int i = 0; i < fishes.Length; i++)
            {
                Console.SetCursorPosition(fishes[i].PositionX, fishes[i].PositionY);
                Console.WriteLine(fishes[i].Appearance);
            }
        }
    }

    class Fish
    {
        public int MaxAge { get;}
        public int Age { get; set; }
        public string Name { get;}
        public string Appearance { get; }
        public int PositionX { get; set; }
        public int PositionY { get; set; }

        public Fish(int maxAge, int age, string name, string appearance, int positionX, int positionY)
        {
            MaxAge = maxAge;
            Age = age;
            Name = name;
            Appearance = appearance;
            PositionX = positionX;
            PositionY = positionY;
        }
    }

    class Aquarium
    {
        public Fish[] Fishes { get; set; } = new Fish[0];

        public int Size = 5;
        public int Height = 20;
        public int Width = 15;

        public void AddNewFish()
        {
            Random random = new Random();

            Console.WriteLine("Сколько должна прожить ваша рыбка?");
            int maxAge = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine($"Каков её возраст на данный момент? Максимум {maxAge - 1}");
            int age = Convert.ToInt32(Console.ReadLine()) - 1;

            Console.WriteLine("Как зовут вашу рыбку?");
            string name = Console.ReadLine();

            Console.WriteLine("Нарисуйте ваши рыбку");
            string appearance = Console.ReadLine();

            Fish[] tempFishes = new Fish[Fishes.Length + 1];

            for (int i = 0; i < tempFishes.Length - 1; i++)
            {
                tempFishes[i] = Fishes[i];
            }
            tempFishes[tempFishes.Length - 1] = new Fish(maxAge, age, name, appearance, random.Next(1, Width - 1), random.Next(1, Height - 1));

            Fishes = tempFishes;
        }

        public void DeleteFish(int id)
        {
            Fishes[id] = null;
            Fish[] tempFishes = new Fish[Fishes.Length - 1];
            for (int i = 0; i < Fishes.Length - 1; i++)
            {
                if (Fishes[i] != null)
                {
                    tempFishes[i] = Fishes[i];
                }
                else
                {
                    tempFishes[i] = Fishes[i + 1];
                }
            }

            Fishes = tempFishes;
        }

        public void FishLive()
        {
            for (int i = 0; i < Fishes.Length; i++)
            {
                if (Fishes[i].Age == Fishes[i].MaxAge)
                {
                    DeleteFish(i);
                }
                else
                {
                    Fishes[i].Age++;
                }
            }
        }

        public void FishMovement()
        {
            Random random = new Random();
            for (int i = Fishes.Length - 1; i > -1; i--)
            {
                Console.SetCursorPosition(Fishes[i].PositionX, Fishes[i].PositionY);
                int direction = random.Next(1, 5);

                switch (direction)
                {
                    case 1:
                        if (Console.CursorTop - 1 != 0)
                        {
                            Fishes[i].PositionY--;
                        }

                        break;
                    case 2:
                        if (Console.CursorTop + 1 != Height - 1)
                        {
                            Fishes[i].PositionY++;
                        }

                        break;
                    case 3:
                        if (Console.CursorLeft - 1 != 0)
                        {
                            Fishes[i].PositionX--;
                        }

                        break;
                    case 4:
                        if (Console.CursorLeft + 1 != Width - 1)
                        {
                            Fishes[i].PositionX++;
                        }

                        break;
                }
            }
        }
    }
}