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

namespace UserLogin
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.OutputEncoding = Encoding.UTF8;

            Console.Write("Enter username: ");
            string username = Console.ReadLine();

            Console.Write("Enter password: ");
            string password = Console.ReadLine();

            LoginValidation validation = new LoginValidation(username, password, ExceptionAction);

            User user = new User();

            if (validation.ValidateUserInput(user))
            {
                Console.WriteLine();
                Console.WriteLine("-----Sucessfull login!-----");
                Console.WriteLine();

                switch (LoginValidation.currentUserRole)
                {
                    case UserRoles.ADMIN:
                        Console.WriteLine("Welcome, ADMIN!");
                        user.PrintInfo();

                        AdminActions();

                        break;
                    case UserRoles.INSPECTOR:
                        Console.WriteLine("Welcome, INSPECTOR!");
                        user.PrintInfo();
                        break;
                    case UserRoles.PROFESSOR:
                        Console.WriteLine("Welcome, PROFESSOR!");
                        user.PrintInfo();
                        break;
                    case UserRoles.STUDENT:
                        Console.WriteLine("Welcome, STUDENT!");
                        user.PrintInfo();
                        break;
                }

                Console.WriteLine();
            }
            else
            {
                //Console.WriteLine(validation.ErrorMessage);
            }

            //Console.ReadLine();
        }

        public static void AdminActions()
        {
            Console.WriteLine("----------------------------------");
            Console.WriteLine("Изберете опция:");
            Console.WriteLine("0: Изход");
            Console.WriteLine("1: Промяна на роля на потребител");
            Console.WriteLine("2: Промяна на активност на потребител");
            Console.WriteLine("3: Списък на потребителите");
            Console.WriteLine("4: Преглед на лог на актовност");
            Console.WriteLine("5: Преглед текуща активност");
            Console.Write("\nИзбор: ");

            int choice = int.Parse(Console.ReadLine());

            switch (choice)
            {
                case 0:
                    Environment.Exit(1);
                    break;
                case 1:
                    ChangeUserRole();
                    break;
                case 2:
                    ChangeUserActivity();
                    break;
                case 3:
                    ListAllUsers();
                    break;
                case 4:
                    ListLogActivity();
                    break;
                case 5:
                    GetCurrentSessionActivities();
                    break;
                default:
                    Console.WriteLine("Oops! Невалиден избор");
                    AdminActions();
                    break;
            }

        }

        public static void GetCurrentSessionActivities()
        {
            Console.WriteLine("Въведете филтър за търсене: ");
            string filter = Console.ReadLine();

            Logger.GetCurrentSessionActivities(filter);

            AdminActions();
        }

        public static void ListLogActivity()
        {
            if (File.Exists("log.txt") == true)
            {
                using (StreamReader Reader = new StreamReader("log.txt"))
                {
                    StringBuilder Sb = new StringBuilder();
                    Sb.Append(Reader.ReadToEnd());
                    {
                        Console.WriteLine("The Log File is read");
                    }

                    Console.WriteLine(Sb);

                    Reader.Close();
                }
            }

            AdminActions();
        }

        public static void ListAllUsers()
        {
            Dictionary<string, int> allUsers = UserData.AllUsersUsernames();

            foreach (KeyValuePair<string, int> user in allUsers)
            {
                Console.WriteLine(user.Value + ". " + user.Key);
            }

            AdminActions();
        }

        public static void ChangeUserRole()
        {
            Console.WriteLine();
            Console.Write("Потребителско име: ");
            string userToEdit = Console.ReadLine();
            Dictionary<string, int> allUsers = UserData.AllUsersUsernames();

            if (!allUsers.ContainsKey(userToEdit) || userToEdit.Equals(String.Empty))
            {
                Console.WriteLine();
                Console.WriteLine("Несъществуващ потребител!");
                AdminActions();
            }

            Console.WriteLine("1.ADMIN, 2.INSPECTOR, 3.PROFESSOR, 4.STUDENT");
            Console.Write("Нова роля: ");
            int role = int.Parse(Console.ReadLine());

            if (role != 1 && role != 2 && role !=3 && role != 4)
            {
                Console.WriteLine("Oops! Невалидна роля!");
                ChangeUserRole();
            }

            if (allUsers.ContainsKey(userToEdit))
            {
                UserData.AssignUserRole(allUsers[userToEdit], (UserRoles)role);
                Console.WriteLine();
                Console.WriteLine("Успешно променена роля!");
                AdminActions();
            }
            else
            {
                Console.WriteLine();
                Console.WriteLine("Невалиден потребител!");
                AdminActions();
            }
        }

        public static void ChangeUserActivity()
        {
            Console.WriteLine();
            Console.Write("Потребителско име: ");
            string userToEdit = Console.ReadLine();
            Dictionary<string, int> allUsers = UserData.AllUsersUsernames();

            Console.Write("Нова дата на активност: ");
            string date = Console.ReadLine();
            DateTime validTo;

            if (DateTime.TryParse(date, out validTo))
            {
                if (allUsers.ContainsKey(userToEdit))
                {
                    UserData.SetUserActiveTo(allUsers[userToEdit], validTo);
                    Console.WriteLine();
                    Console.WriteLine("Успешно сменена дата!");
                    AdminActions();
                }
                else
                {
                    Console.WriteLine("Невалиден потребител!");
                    AdminActions();
                }

            }
            else
            {
                Console.WriteLine("Невалидна дата!");
                AdminActions();
            }

        }

        public static void ExceptionAction(string s)
        {
            Console.WriteLine("Oops! " + s);
        }
    }
}