using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GrandTheftMultiplayer.Server.API;
using GrandTheftMultiplayer.Server.Elements;

namespace Gamemode
{
    public class Login : Script
    {
        public static Login Instance;
        public Action<Client, User> OnUserLogin;

        public Login()
        {
            Instance = this;
            API.onClientEventTrigger += API_onClientEventTrigger;
        }

        private void API_onClientEventTrigger(Client sender, string eventName, params object[] arguments)
        {
            if (eventName == "CheckUser")
            {
                // This will return which button was clicked. Since above in ShowDialog(),
                // we declared 3 buttons to be displayed, then it will return either
                // 0, 1, or 2 depending on which button was clicked
                int button_clicked = Convert.ToInt32(arguments[0]);

                // This will return the string that was inputted into the input box
                string input_text = arguments[1].ToString();

                if (button_clicked == 0) // Login
                {
                    API.consoleOutput(input_text);
                    ShowPasswordSelection(sender, input_text);
                    return;
                }
                if (button_clicked == 1) // Register
                {
                    API.consoleOutput(input_text);
                    ShowRegistrationPassword(sender, input_text);
                    return;
                }
                return;
            }
            if (eventName == "CheckPassword")
            {
                int button_clicked = Convert.ToInt32(arguments[0]);
                string input_text = arguments[1].ToString();

                if (button_clicked == 0)
                {
                    API.consoleOutput(input_text);
                    CheckPassword(sender, input_text);
                    return;
                }
            }

            if (eventName == "UserRegistration")
            {
                int button_clicked = Convert.ToInt32(arguments[0]);
                string input_text = arguments[1].ToString();

                if (button_clicked == 0)
                {
                    API.consoleOutput(input_text);
                    string username = sender.getData("username");
                    StartRegistration(sender, username, input_text);
                    return;
                }
            }
        }

        public static void ShowLogin(Client player)
        {
            DBXHandler.Instance.ShowDialog(player, "dbx_text_input", "CheckUser", "Login", "Welcome to Blaine County Roleplay. \nPlease enter your Username into the box below.\nIf you have an account already choose Login, otherwise choose Register.", 2, "Login", "Register");

        }

        private void ShowPasswordSelection(Client player, string username)
        {
            player.setData("username", username);
            DBXHandler.Instance.ShowDialog(player, "dbx_text_input", "CheckPassword", "Login", "Enter your Password for " + username, 1, "Login", true);
        }

        private void ShowRegistrationPassword(Client player, string username)
        {
            if (User.GetUser(username, false) != null)
            {
                player.sendChatMessage("~r~This username is already in use");
                ShowLogin(player);
            }
            player.setData("username", username);
            DBXHandler.Instance.ShowDialog(player, "dbx_text_input", "UserRegistration", "Registration", "Enter your Password for " + username, 1, "Register", true);
        }

        private void CheckPassword(Client player, string password)
        {
            var username = player.getData("username");
            var pass = password.Replace(username, "");
            API.consoleOutput(pass);

            User user = User.GetUser(username);
            if (user == null)
            {
                player.sendChatMessage("~r~Invalid username or password");
                ShowLogin(player);
            }

            if (API.verifyPasswordHashBCrypt(pass, user.Hash) == false)
            {
                player.sendChatMessage("~r~Invalid username or password");
                ShowLogin(player);
            }
            player.resetData("username");
            LoginUser(player, user);
        }

        private void StartRegistration(Client player, string username, string password)
        {
            player.resetData("username");
            var pass = password.Replace(username, "");
            API.consoleOutput(pass);
            RegisterNewUser(player, username, pass);
        }

        private void RegisterNewUser(Client player, string username, string password)
        {
            User user = User.CreateNewUser(username, password);

            player.SendInfoMessage("You've ~g~sucessfully ~w~created your account. Please login.");
            ShowLogin(player);
        }

        private void LoginUser(Client player, User user)
        {
            player.setData("USER", user);
            if (OnUserLogin != null)
            {
                player.SetLoggedIn(true);
                OnUserLogin(player, user);
            }

        }
    }
}