using System;

namespace Dla_damiana
{
    public interface IFigura
    {
    }
    public class Kwadrat : IFigura
    {

    }
    public class Trojkat : IFigura
    {

    }

    abstract class FabrykaFigur : IFigura
    {
        public abstract IFigura StworzFigure();
    }

    class FabrykaKwadratow : FabrykaFigur
    {
        public override IFigura StworzFigure()
        {
            return new Kwadrat();
        }
    }

    class FabrykaTrojkotow : FabrykaFigur
    {
        public override IFigura StworzFigure()
        {
            return new Trojkat();
        }
    }

    public interface IDziałania
    {
        void DeltaDodatnia(double a, double b, double c);
        void DeltaRownaZero(double a, double b, double c);
        void DeltaUjemna(double a, double b, double c);
    }

    public class Działania : IDziałania
    {
        public void DeltaDodatnia(double a, double b, double c)
        {
            double delta = b * b - 4.0 * a * c;
            Console.WriteLine("Pierwszy pierwiastek: {0}", (-b - delta) / (2 * a));
            Console.WriteLine("Drugi pierwiastek: {0}", (-b + delta) / (2 * a));
        }

        public void DeltaRownaZero(double a, double b, double c)
        {
            Console.WriteLine("Pierwiastek: {0}", (-b) / (2 * a));
        }

        public void DeltaUjemna(double a, double b, double c)
        {
            Console.WriteLine("Brak pierwiastków wielomianu kwadratowego");
        }
    }

    public class Fasada
    {
        public void ObliczPierWieomianu(double a, double b, double c)
        {
            Działania ob = new Działania();
            double delta = b * b - 4.0 * a * c;
            if (delta > 0)
            {
                ob.DeltaDodatnia(a, b, c);
            }
            else if (delta == 0)
            {
                ob.DeltaRownaZero(a, b, c);
            }
            else
            {
                ob.DeltaUjemna(a, b, c);
            }
        }
    }

    class Client
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string ZipCode { get; set; }
        private double _myWallet;
        public double MyWallet { get => _myWallet; set => _myWallet = value; }
        public string Town { get; set; }
        public string Street { get; set; }
        public int HomeNumber { get; set; }

        public Client(Builder builder)
        {
            FirstName = builder.firstname;
            LastName = builder.lastname;
            ZipCode = builder.zipcode;
            _myWallet = builder.myWallet;
            Town = builder.town;
            Street = builder.street;
            HomeNumber = builder.homenumber;
        }

        public class Builder
        {
            public string firstname;
            public string lastname;
            public string zipcode;
            public double myWallet;
            public string town;
            public string street;
            public int homenumber;

            public Builder FirstName(string firstname)
            {
                this.firstname = firstname;
                return this;
            }

            public Builder LastName(string lastname)
            {
                this.lastname = lastname;
                return this;
            }

            public Builder ZipCode(string zipcode)
            {
                this.zipcode = zipcode;
                return this;
            }

            public Builder MyWallet(double myWallet)
            {
                this.myWallet = myWallet;
                return this;
            }

            public Builder Town(string town)
            {
                this.town = town;
                return this;
            }

            public Builder HomeNumber(int homenumber)
            {
                this.homenumber = homenumber;
                return this;
            }

            public Builder Street(string street)
            {
                this.street = street;
                return this;
            }

            public Client build()
            {
                return new Client(this);
            }
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            FabrykaFigur fabryka = new FabrykaKwadratow();
            IFigura kwadrat = fabryka.StworzFigure();

            Fasada ob = new Fasada();
            ob.ObliczPierWieomianu(2, 6, 4);

            Client client = new Client.Builder()
        .FirstName("Slawomir")
        .LastName("Kowalski")
        .ZipCode("34 174")
        .MyWallet(456.32)
        .HomeNumber(23)
        .Town("Cambridge")
        .Street("botolph lane")
        .build();
        }
    }
}