using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace HW
{
    abstract class Shape : IComparable<Shape>
    {
        private string name;
        public string Name { get { return name; } }
        public Shape(string name)
        {
            this.name = name;
        }
        public abstract double Area();
        public abstract double Perimeter();
        public int CompareTo(Shape s)
        {
            Shape shape = s as Shape;
            if (shape != null)
                return this.Area().CompareTo(shape.Area());
            else
                throw new Exception("���������� �������� ��� �������");
        }
    }

    class Circle : Shape
    {
        private double radius;
        public double Radius { get { return radius; } }
        public Circle(string name, double radius) : base(name)
        {
            this.radius = radius;
        }
        public override double Area()
        {
            return Math.PI * (this.radius * this.radius);
        }
        public override double Perimeter()
        {
            return this.radius * (2 * Math.PI);
        }
    }
    class Square : Shape
    {
        private double a;
        public double A { get { return a; } }
        public Square(string name, double a) : base(name)
        {
            this.a = a;
        }
        public override double Area()
        {
            return a * this.a;
        }
        public override double Perimeter()
        {
            return 4 * this.a;
        }
    }


    class Program
    {

        static void Main()
        {
            List<Shape> shapes = new List<Shape>();

            for (int i = 0; i < 4; i++)
            {
                Console.WriteLine("What shape should it be? \n" +
                    "S - Square    :    C - Circle\n" +
                    "If you want to stop entering shapes press e");
                string tempShape = Console.ReadLine();
                if (tempShape == "s" || tempShape == "S")
                {
                    Console.Write("Enter length : ");
                    double tempShapePar = Convert.ToDouble(Console.ReadLine());
                    shapes.Add(new Square($"Square {i}", tempShapePar));
                }
                else if (tempShape == "c" || tempShape == "C")
                {
                    Console.Write("Enter radius : ");
                    double tempShapePar = Convert.ToDouble(Console.ReadLine());
                    shapes.Add(new Circle($"Circle {i}", tempShapePar));
                }
                else if (tempShape == "e")
                {
                    break;

                }
                else
                {
                    i--;
                    Console.WriteLine("You have entered wrong char. Try again");

                }
            }
            Console.WriteLine("Do you want to find largest perimiter?\n" +
                "Y - yes    :   N - no");
            string TempPer = Console.ReadLine(); ;
            bool ans = false;
            while (!ans)
            {
                if ((TempPer == "y" || TempPer == "Y") && shapes.Count > 0)
                {
                    ans = true;
                    double tempPerimeter = 0;
                    int tempCounterTrue = 0;
                    int tempCounter = 0;
                    foreach (var i in shapes)
                    {
                        if (tempPerimeter < i.Perimeter())
                        {
                            tempPerimeter = i.Perimeter();
                            tempCounterTrue = tempCounter;
                        }
                        tempCounter++;
                    }
                    Console.WriteLine(shapes[tempCounterTrue].Name + " has the biggest perimeter");
                }
                else if ((TempPer == "y" || TempPer == "Y") && shapes.Count <= 0)
                {
                    Console.WriteLine("Not enough items in list");
                    ans = true;
                }
                else if (TempPer == "n" || TempPer == "N")
                {
                    ans = true;
                }
                else
                {
                    Console.WriteLine("Wrong answer. Try again.");
                }
            }

            Console.WriteLine("Do you want to sort list and print it?\n" +
               "Y - yes    :   N - no");
            bool istempSort = false;
            string SortAns = Console.ReadLine();
            while (!istempSort)
            if ((SortAns == "y" || SortAns == "Y") && shapes.Count > 0)
            {
                istempSort = true;
                shapes.Sort();
                foreach (var i in shapes)
                {
                    Console.WriteLine($"{i.Name}, Area = {i.Area()}, Perimeter = {i.Perimeter()}");
                }
            }
            else if ((SortAns == "y" || SortAns == "Y") && shapes.Count <= 0)
                {
                    Console.WriteLine("Not enough items in list");
                    istempSort = true;
                }
            else if (SortAns == "n" || SortAns == "N")
            {
                    istempSort = true;
                    Console.WriteLine("Not enough items in list");
            }
            else
            {
                Console.WriteLine("Wrong answer. Try again.");
            }

            Console.ReadKey();
        }
    }
}