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

namespace _2.LaptopShop
{
    class Laptop
    {
        private string model;
        private int price;
        private string manufacturer;
        private string processor;
        private int ram;
        private string graphics;
        private string hdd;
        private string screen;
        private Battery battery;

        public Laptop(string model, int price)
        {
            this.Model = model;
            this.Price = price;
        }
        public Laptop(string model, int price, string manufacturer = null, string processor = null, int ram = 0, string hdd = null, string graphicsCard = null, string screen = null, string type = null, int batteryLife = 0)
            : this(model, price)
        {
            this.Manufacturer = manufacturer;
            this.Processor = processor;
            this.Ram = ram;
            this.Hdd = hdd;
            this.Graphics = graphics;
            this.Battery = battery;
            this.Screen = screen;
            this.battery = new Battery(type, batteryLife);
        }

        public string Model
        {
            get { return this.model; }
            set
            {
                if (string.IsNullOrEmpty(value))
                {
                    throw new ArgumentNullException("The model field can not be empty!");
                }
                this.model = value;
            }
        }
        public int Price
        {
            get { return this.price; }
            set
            {
                if (value < 0)
                {
                    throw new IndexOutOfRangeException("The price can not be negative!");
                }
                this.price = value;
            }
        }
        public string Manufacturer
        {
            get { return this.manufacturer; }
            set
            {
                this.manufacturer = value;
            }
        }
        public string Processor
        {
            get { return this.processor; }
            set
            {
                this.processor = value;
            }
        }
        public int Ram
        {
            get { return this.ram; }
            set
            {
                this.ram = value;
            }
        }
        public string Graphics
        {
            get { return this.graphics; }
            set
            {
                this.graphics = value;
            }
        }
        public string Hdd
        {
            get { return this.hdd; }
            set
            {
                this.hdd = value;
            }
        }
        public string Screen
        {
            get { return this.screen; }
            set
            { this.screen = value; }
        }
        public Battery Battery
        {
            get { return this.battery; }
            set { this.battery = value; }
        }

        public override string ToString()
        {
            StringBuilder laptopStringBuild = new StringBuilder();
            laptopStringBuild.AppendLine("model: " + this.Model);
            if (this.Manufacturer != null)
            {
                laptopStringBuild.AppendLine("manufacturer: " + this.Manufacturer);
            }
            if (this.Processor != null)
            {
                laptopStringBuild.AppendLine("processor: " + this.Processor);
            }
            if (this.Ram != 0)
            {
                laptopStringBuild.AppendLine("RAM: " + this.Ram);
            }
            if (this.Hdd != null)
            {
                laptopStringBuild.AppendLine("HDD: " + this.Hdd);
            }
            if (this.Screen != null)
            {
                laptopStringBuild.AppendLine("screen: " + this.Screen);
            }
            if (this.Battery != null)
            {
                laptopStringBuild.AppendLine(this.Battery.ToString());
            }
            laptopStringBuild.AppendLine("price: " + this.Price);
            return laptopStringBuild.ToString();
        }
        }



    class Battery
    {
        private string type;
        private double batteryLife;

        public Battery(string type)
        {
            this.Type = type;
        }
        public Battery(string type, int batteryLife)
            : this(type)
        {
            this.BatteryLife = batteryLife;
        }

        public string Type
        {
            get { return this.Type; }
            set
            {
                if (value == "")
                {
                    throw new ArgumentException("Invalid type!");
                }
                this.type = value;
            }
        }
        public double BatteryLife
        {
            get { return this.BatteryLife; }
            set
            {
                if (batteryLife < 0)
                {
                    throw new ArgumentException("Battery life can not be negative!");
                }
                this.batteryLife = value;
            }
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            Laptop sample = new Laptop("Yoga", 34, "lenovo", "intel", 16, "ekran", "nvidia", "15", "bateriq", 999);

            Console.WriteLine(sample.ToString());
        }
    }
}