using System;
using System.Collections.Generic;
using System.Text;
using Sys = Cosmos.System;
using Cosmos.System.FileSystem;
using Cosmos.System.FileSystem.VFS;
using System.IO;
using Cosmos.HAL;
using System.Security.Cryptography;
using System.Net;

namespace OS_Test
{
    public class Kernel : Sys.Kernel
    {
        protected override void BeforeRun()
        {
            Console.Clear();
            Console.WriteLine("Loaded BronzeOS.");
            Console.WriteLine("Created by GtaMasterYT!");
            var fs = new CosmosVFS();
            VFSManager.RegisterVFS(fs);
            fs.Initialize();
        }

        protected override void Run()
        {
            var foldercheck = @"0:\BronzeOS\";
            if (!Directory.Exists(foldercheck))
            {
                Directory.CreateDirectory(foldercheck);
            }
            var firstRunCheck = @"0:\BronzeOS\firstrun.dat";
            if (!File.Exists(firstRunCheck))
            {
                File.Create(firstRunCheck);
                File.WriteAllText(firstRunCheck, "0");
            }
            if (File.ReadAllText(firstRunCheck) == "0")
            {
                initiateFirstRun();
            }
            Console.WriteLine();
        }
        private static readonly RandomNumberGenerator Random = RandomNumberGenerator.Create();

        // Login Variables
        // TODO: Login
        public static readonly int BlockBitSize = 128;
        public static readonly int KeyBitSize = 256;
        public static readonly int SaltBitSize = 64;
        public static readonly int Iterations = 10000;
        public static readonly int MinPasswordLength = 12;
        public static byte[] NewKey()
        {
            var key = new byte[KeyBitSize / 8];
            Random.GetBytes(key);
            return key;
        }

        public void runOS()
        {
            Console.WriteLine("Test.");
            Stop();
        }

        public void loginOS()
        {
            Console.Clear();
            Console.WriteLine("Welcome to BronzeOS!");
            Console.WriteLine("Please enter your username.");
            Console.Write(">");
            string username = Console.ReadLine();
            Console.WriteLine("Please enter your password.");
            Console.Write(">");
            string password = Console.ReadLine();
            if(password != "" && username != "")
            {
                if(File.ReadAllLines(@"0:\BronzeOS\login.dat")[0] == username && File.ReadAllLines(@"0:\BronzeOS\login.dat")[1] == password)
                {
                    runOS();
                }
            }
            else
            {
                Console.WriteLine("Please enter actual login information.");
                loginOS();
            }
        }


        // First Run Function
        public void initiateFirstRun()
        {
            Console.Clear();
            Console.WriteLine("Welcome to BronzeOS!");
            Console.WriteLine("Please enter your username.");
            Console.Write(">");
            string username = Console.ReadLine();
            Console.WriteLine("Please enter your password.");
            Console.Write(">");
            string password = Console.ReadLine();
            if (password != "" && username != "")
            {
                if (!File.Exists(@"0:\BronzeOS\login.dat"))
                {
                    File.Create(@"0:\BronzeOS\login.dat");
                }
                File.WriteAllText(@"0:\BronzeOS\login.dat", username + "\n" + password);
            }
            else
            {
                Console.WriteLine("Your username or password was empty. Please try again.");
                initiateFirstRun();
            }


        }
    }
}