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

namespace BankÖvning
{
    class Bank
    {
        private List<Person> personList;
        private Person loggedInUser;
        private void Welcome()
        {
            Console.WriteLine("Welcome to the worlds best bank!\nTo logg in press [A]\nTo create new account press[B]");
        }

        private bool LoggedIn()
        {
            return (loggedInUser != null);// om loggedInUser inte är null är man inloggad
        }

        private void Login(String uName, String pass)
        {
            Person p = personList.Find(x => x.GetName() == uName);
            if( p != null)
            {
                if(p.Checkpass(pass))
                {
                    loggedInUser = p;
                }
                else
                {
                    Console.WriteLine("Felaktigt lösenord");
                }
            }
            else
            {
                Console.WriteLine("Ogiltigt användarnamn");
            }

        }

        private bool CreateUser()
        {
            Console.WriteLine("Enter username of your choice");
            string uName = Console.ReadLine();
            Console.WriteLine("Enter password of your choice");
            string pass = Console.ReadLine();
            if (null != personList.Find(x => x.GetName() == uName))
            {
                Console.WriteLine("Username taken");
                return false;
            }

            if(pass.Length < 3)
            {
                Console.WriteLine("För kort lösenord");
                return false;
            }
            personList.Add(new Person(uName, pass));
            Console.WriteLine("Användare skapad");
            return true;
        }

        private void Choice()
        {
            char uChoice = char.Parse(Console.ReadLine());
            switch (uChoice)
            {
                case 'A':
                    Console.Clear();
                    Console.WriteLine("Enter your username");
                    string uName = Console.ReadLine();
                    Console.WriteLine("Enter your password");
                    string uPass = Console.ReadLine();
                    Login(uName, uPass);
                    break;
                case 'B':
                    Console.Clear();
                    while (!CreateUser()) ;
                    break;
            }
        }
        private void BankChoice()
        {
            // User meny för det olika valen
            Console.WriteLine("To check your balance press [B]\n");
            Console.WriteLine("To Deposit money press [D]\n");
            Console.WriteLine("To Withdraw money press [W]\n");
            Console.WriteLine("To quit the application press [Q]\n");
            char bankChoise = char.Parse(Console.ReadLine());

            switch (bankChoise) // Kollar kontots summa +- deposits och withdraws.
            {
                case 'B':
                    Console.WriteLine("Your account balance is " + loggedInUser.GetBalance());
                    break;
                case 'D':
                    Console.WriteLine("How much money do you want to deposit?");
                    int deposit = int.Parse(Console.ReadLine());
                    loggedInUser.Deposit(deposit);
                    Console.WriteLine("Your new balance is" + loggedInUser.GetBalance());
                    break;
                case 'W':
                    Console.WriteLine("How much do you want to withdraw?");
                    int withdraw = int.Parse(Console.ReadLine());
                    loggedInUser.Withdraw(withdraw);
                    Console.WriteLine("Your new balance is" + loggedInUser.GetBalance());
                    break;
            }
        }

        public Bank()
        {
            personList = new List<Person>();
            loggedInUser = null;
            personList.Add(new Person("sture", "1234")); // Lägger till en användare som redan ska finnas i banksystemet!
            for (int i = 0; i < 100; i++) // lägger till 100 personer i listan för att testköra att listan fungerar.
            {
                personList.Add(new Person("Person" + i, "" + i));
            }
        }

        public void Start()
        {
            while (!LoggedIn())
            {
                Welcome();
                Choice();
            }
            while(true)  BankChoice();
        }

    }
}