using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;

namespace quiz_forms
{
    class LoginCreate
    {
       //Declaring Variables Start
        List<string> data = new List<string>();
        private string username;
        private string password;
        string passgood = "";
        int passwordmade = 0;
        string usergood = "";
        string accountcreated;
        string validlogin = "false";
        //Declaring Variables End

        public string Username
        {
            get { return username; }
            set { username = value; }
        }

        public string Password
        {
            get { return password; }
            set { password = value; }
        }

        public string usercheck
        {
            get { return usergood; }
        }

        public string passcheck
        {
            get { return passgood; }
        }

        public string passwordadd(string password)
        {
            int passlength = password.Length;
            int validationint = 0;
            if (passlength > 5 && passlength <14)
            {
                validationint++;
            }
            foreach (char var in password)
            {
                if (var.ToString() == char.ToUpper(var).ToString())
                {
                    validationint++;
                }
                if (var.ToString() == char.IsDigit(var).ToString())
                {
                    validationint++;
                }
            }
            if (validationint >= 3)
            {
                passwordmade++;
                passgood = "good";
                return "good";
            }
            else
            {
                passgood = "Error";
                return "Error";
            }
        }

        public string usernameadd(string username)
        {
            int userlength = username.Length;
            if (userlength > 0)
            {
                usergood = "good";
                return "good";
            }
            else
            {
                usergood = "Error";
                return "Error";
            }

        }

        public string adminreg(User user, List<User> players, Image adminav)
        {
            if (!File.Exists("Users.bin"))
            {
                try
                {
                    FileStream fs = new FileStream("Users.bin", FileMode.Create);
                    try
                    {
                        user.getUser = "Admin";
                        user.getPassword = "Admin123";
                        user.getAvatar = adminav;
                        user.getrank = 1;
                        user.getScore = 12345;

                    }
                    catch
                    {
                        return "couldnt add admin";
                    }
                }
                catch
                {
                    return "couldnt create file";
                }
            }

        }

        public string validation(string username, string password, Image avatar, User playuser, List<User> user)
        {
            string registered = "false";
            FileStream fileStream = File.OpenRead("../../TextFiles/users.bin");
            BinaryReader binaryReader = new BinaryReader(fileStream);
            while (binaryReader.PeekChar() != -1)
            {
                string userbin = binaryReader.ReadString();

                if ((userbin == username))
                {
                    registered = "alreadyacc";
                }
            }
            binaryReader.Close();
            if (registered != "alreadyacc")
            {
                int userlength = username.Length;
                if (userlength > 0)
                {
                    data.Add(username);
                    usergood = "good";
                }
                else
                {
                    usergood = "Error";
                }


                int passlength = password.Length;
                int validationint = 0;
                if (passlength > 5 && passlength < 14)
                {
                    validationint++;
                }
                foreach (char var in password)
                {
                    if (var.ToString() == char.ToUpper(var).ToString())
                    {
                        validationint++;
                    }
                    if (var.ToString() == char.IsDigit(var).ToString())
                    {
                        validationint++;
                    }
                }
                if (validationint >= 3)
                {
                    passwordmade++;
                    passgood = "good";
                }
                else
                {
                    passgood = "Error";
                }

                if ((usergood == "good") && (passgood == "good"))
                {
                    if (register(username, password, avatar,playuser,user) == "true")
                    {
                        registered = "true";
                    }
                }
            }
            else
            {
                return registered = "already acc";

            }
            return registered;
        }

        public string register(string username, string password, Image avatar, User user, List<User> players)
        {
            FileStream fs = new FileStream("Users.bin", FileMode.Create);
            BinaryFormatter formatter = new BinaryFormatter();
            user.getAvatar = avatar;
            user.getUser = username;
            user.getScore = 0;
            user.getPassword = password;
            user.getrank = 0;
            players.Add(user);
            try
            {
                formatter.Serialize(fs, players);
                accountcreated = "true";
                fs.Close();
            }
            catch
            {
                accountcreated = "false";
                fs.Close();
            }
            return accountcreated;
        }

        public string login(string username, string password, User user, List<User> players)
        {
            FileStream fs = new FileStream("Users.bin", FileMode.Open);
            BinaryFormatter formatter = new BinaryFormatter();
            try
            {
                players = (List<User>)formatter.Deserialize(fs);
                fs.Close();
                int userPosition = -1;
                foreach (User player in players)
                {
                    if (player.getUser == username)
                    {
                        userPosition = players.IndexOf(player);
                        if (userPosition == -1)
                        {
                            return "false";
                        }
                        else if (players.ElementAt(userPosition).getPassword == password)
                        {
                            user.getUser = player.getUser;
                            user.getAvatar = player.getAvatar;
                            user.getPassword = player.getPassword;
                            user.getScore = player.getScore;
                            user.getrank = player.getrank;
                            return "true";
                        }
                        else
                        {
                            return "false";
                        }
                    }
                }
            }
            catch
            {
                return "false";
            }
            return "false";
        }
    }
}