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

namespace PlaneLib
{
    class Circle : PlaneFigure
    {
        static Random rnd = new Random();

        private string name;

        public string Name
        {
            get { return name; }
        }

        private double radius;

        public double Radius
        {
            get { return radius; }
            set
            {
                if (value <= 0)
                {
                    throw new PlaneFigureException("the circle's radius is non-positive");
                }
                else
                {
                    radius = value;
                }
            }
        }


        public Circle(string name, double _radius) : base(name)
        {
            this.Radius = _radius;
            this.name = name;
        }

        public override double Area
        {
            get
            {
                return Math.PI * this.Radius * this.Radius;
            }
        }

        public override void ChangePlaneFigure()
        {
            double curr = -1;
            while (curr <= 0)
            {
                curr = rnd.Next(-2, 6) + rnd.NextDouble();
                this.Radius = curr;
            }
        }

        public override string ToString()
        {
            return base.ToString() + $"Circle with radius: {Radius} cm";
        }
    }
}