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

namespace ConsoleApp1
{
    public class System : ISystem
    {
        private string name;
        private string version;
        private string sn;
        private bool isOn = false;

        public System(string name, string version, string sn)
        {
            this.name = name;
            this.version = version;
            this.sn = sn;
        }

        public string Name => this.name;
        public string Version => this.version;
        public string SN => this.sn;

        public override string ToString()
        {
            return $"  - Name: {this.name}\n  - Version: {this.version}";
        }

        public bool Start()
        {
            if (this.isOn) return false;

            Console.WriteLine($"System starting...");
            this.isOn = true;

            return true;
        }

        public void Restart()
        {
            Console.WriteLine("System restarting in:");

            for (int i = 3; i > 0; i--)
            {
                Console.WriteLine(i);
                Thread.Sleep(1000);
            }

            this.Quit();
            this.Start();
        }

        public bool Quit()
        {
            if (!this.isOn) return false;

            Console.WriteLine($"System quiting...");
            this.isOn = false;

            return true;
        }
    }
}