// See https://aka.ms/new-console-template for more information

using System.Security.AccessControl;
namespace BankApp
{
    public class BankAppProg
    {
        private static List<Account> accounts = new List<Account>();

        public static void Main(string[] args)
        {
            bool isAppRunning = true;

            while (isAppRunning)
            {
                DisplayMenu();

                int choice = GetChoice();

                switch (choice)
                {
                    case 1:
                        AddAccount();
                        break;
                    case 2:
                        ViewAccounts();
                        break;
                    case 3:
                        Deposit();
                        break;
                    case 4:
                        Withdraw();
                        break;
                    case 5:
                        Console.WriteLine("Exiting App");
                        isAppRunning = false;
                        break;
                    default:
                        Console.WriteLine("Invalid Choice");
                        break;
                }
            }
        }


        static void DisplayMenu()
        {
            Console.Clear();
            Console.WriteLine("MENU");
            Console.WriteLine("-------");
            Console.WriteLine("1. Add Account ");
            Console.WriteLine("2. View All Accounts");
            Console.WriteLine("3. Deposit ");
            Console.WriteLine("4. Withdraw ");
            Console.WriteLine("5. Exit ");
        }
        
        static int GetChoice()
        {
            Console.WriteLine("Choose an option: ");
            int choice;
        
            while (!int.TryParse(Console.ReadLine(), out choice) || choice < 1 || choice > 5)
            {
                Console.WriteLine("Please enter a valid choice.");
            }
            return choice;
        }
        
        static void AddAccount()
        {
            Console.Clear();
            Console.WriteLine("Enter Account Holder Name: ");
            string name = Console.ReadLine();
        
            int accountNumber = accounts.Count + 1;
            Account newAccount = new Account(accountNumber, name);
            accounts.Add(newAccount);
           
            Console.WriteLine($"A new account has been created for {name} with the account number {accountNumber}");
            Console.WriteLine("Press any key to continue...");
            Console.ReadKey();
        }

        static void ViewAccounts()
        {
            Console.Clear();
            if (accounts.Count == 0)
            {
                Console.WriteLine("No accounts have been added");
            }
            else
            {
                Console.WriteLine("ACCOUNTS");
                Console.WriteLine("------------");

                foreach (var account in accounts)
                {
                    Console.WriteLine($"Account Number: {account.AccountNumber}");
                    Console.WriteLine($"Account Holder: {account.AccountHolder}");
                    Console.WriteLine($"Balance: ${account.Balance}");
                    Console.WriteLine("-------------");
                }
            }
            Console.WriteLine("Press any key to continue...");
            Console.ReadKey();
        }

        static void Deposit()
        {
            
            // Find acc for number given
            Console.Clear();
            Console.Write("Enter Account Number: ");
            int accountNumber = int.Parse(Console.ReadLine());
            
            //lambda expressions(?)
            // Look up acc list array for matching number
            Account account = accounts.Find(a => a.AccountNumber == accountNumber);
            if (account != null)
            {
                Console.Write("Enter Deposit Amount: $");
                double depositAmount = double.Parse(Console.ReadLine());

                if (depositAmount > 0)
                {
                    account.Balance += depositAmount;
                    Console.WriteLine($"Deposited ${depositAmount} into Account {account.AccountNumber}");
                    Console.WriteLine($"Current Balance: ${account.Balance}");
                }
                else
                {
                    {
                        Console.WriteLine("Deposit amount must be greater than zero");
                    }
                }
                
            }
            else
            {
                Console.WriteLine("Account Not Found");
            }

            Console.WriteLine("Press any key to continue...");
            Console.ReadKey();
        }


        static void Withdraw()
        {
            Console.Clear();
            Console.Write("Enter Account Number: ");
            int accountNumber = int.Parse(Console.ReadLine());
            
            Account account = accounts.Find(a => a.AccountNumber == accountNumber);

            if (account != null)
            {
                Console.Write("Enter Withdraw Amount: ");
                double withdrawAmount = double.Parse(Console.ReadLine());

                if (withdrawAmount < 0 || withdrawAmount > account.Balance)
                {
                    Console.WriteLine("Withdrawl has Failed");
                }

                else
                {
                    account.Balance -= withdrawAmount;
                    Console.WriteLine($"Withdrawn ${withdrawAmount} from Account {account.AccountNumber}");
                    Console.WriteLine($"Current Balance: ${account.Balance}");
                }
                
            }
            else
            {
                Console.WriteLine("Account Not Found");
            }
            Console.WriteLine("Press any key to continue...");
            Console.ReadKey();
        }
    }
}