oop

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

namespace MobilePhoneDevice
{
    class Battery
    {
        private string model;
        private double hoursIdle = 4d;  // !
        private double hoursTalk = 0.5d; // !
        public BatteryType BatteryType { get; set; }

        //property for model
        public string Model
        {
            get
            {
                return this.model;
            }
            private set // ????
            {
                this.model = value;
            }
        }

        //property for hours idle
        public double HoursIdle
        {
            get { return this.hoursIdle; }
            private set // ????
            {
                this.hoursIdle = value;
                if (value < 0.0)
                {
                    throw new ArgumentException();
                }
            }
        }

        //property for hours talk
        public double HoursTalk
        {
            get { return this.hoursTalk; }
            private set // ????
            {
                this.hoursTalk = value;
            }
        }

        //no default contructor
        //public Battery()
        //{
        //}

        //constructor
        public Battery(string model):this(model, 4,0.5,BatteryType.Liion)
        {
        }

        //constructor
        public Battery(string model, double hoursTalk):this(model,4.0,hoursTalk,BatteryType.Liion)
        {
        }
        //constructor
        public Battery(string model, double hoursIdle, double hoursTalk,BatteryType batteryType)
        {
            this.model = model;
            this.hoursIdle = hoursIdle;
            if (hoursIdle<0)
            {
                throw new ArgumentException();
            }
            this.hoursTalk = hoursTalk;
            if (hoursTalk<0)
            {
                throw new ArgumentException();
            }
            this.BatteryType = batteryType;
        }
    }
}