2015_OOP_AbstractionEncapsulationPolymorphism_Person

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

namespace World1
{
    class  Person : IIntroducable // : Object
    {
        protected string name;
        protected int age;
        private double temp = 0.23;
        private const int COUNTER = 3;
        private string[] friends = new String[COUNTER];
        private static int counter = 0;
        private static string nationality = "Bulgarian";
        public const double PI = 3.14;
        public static readonly double onlyRead;
        private string expression;

        public static int Counter
        {
            get { return counter; }
        }

        public static string Nationality
        {
            get { return nationality; }
            set { nationality = value; }
        }

        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        public double Balance
        {
            get { return 2 * age * temp; }
        }

        public string[] Freinds
        {
            get { return friends; }
        }


        // Automatic property
        // public string Name { get; set; }

        public int Age
        {
            get { return age; }
            set { age = value; }
        }

        static Person()
        {
            onlyRead = 5.4;
        }

        // Workign Horse
        public Person(string name, int age = 0)
        {
            this.name = name;
            this.age = age;
            counter++;
            // onlyRead = 2.71;
        }

        public Person()
            : this("Default", 0)
        {
           // this.name = "Default";
           // this.age = 0;
        }

        public Person(int age, string name, params string[] friends)
            : this(name, age)
        {
            // this.name = name;
            // this.age = age;
            int i = 0;
            // if (friends.Length > COUNTER)
            // {
            //    return;
            // }
            foreach (string friend in friends) {
                if (i > (COUNTER - 1)) break;
                this.friends[i] = friend;
                i++;
            }

        }

        public virtual void IntroduceYourSelf()
        {
            Console.WriteLine("My name is {0}! I am {1} years old! My balance is {2}. My nationality is {3}. I am feeling {4}",
                name, age, Balance, nationality, GetMyFeelings());
           foreach(string friend in friends) {
                Console.WriteLine("My friend: {0}", friend);
           }

        }

        public static double GetNationalIncome()
        {
            return 10000 * counter;
        }

        public void Listen(string expression)
        {
            this.expression = expression;
        }

        public string Talk()
        {
            return this.expression;
        }

        private string GetMyFeelings()
        {
            if (age > 50) {
                return "sad";
            }
            return "happy";
        }

        /*
        public string GetName()
        {
            return name;
        }

        public void SetName(string name)
        {
            this.name = name;
        }

        public int GetAge()
        {
            return age;
        }

        public void SetAge(int age)
        {
            this.age = age;
        }
        */
    }
}