from datetime import datetime

todayDate = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
#inlogTime = (datetime.now().strftime('%Y-%m-%d %H:%M:%S') - todayDate)

class accounts:
    def __init__(self, accountNumber, balance):
        self.accountNumber = accountNumber
        self.balance = balance


class transactions:
    def __init__(self, account, date, transactionType, amount):
        self.account = account
        self.date = date
        self.transactionType = transactionType
        self.amount = amount

    def CreateAccount(self):
        while True:
            accountNumber = CheckIfSumIsInt("Ange ditt nya kontonummer")
            print()
            if accountNumber in accountAndBalance:
                print("Kontot existerar redan.")
                print()
                break
            else:
                accountAndBalance[accountNumber] = 0
                print(f"Konto med kontonr: {accountNumber} är skapat!")
                newAccount = accounts(accountNumber, 0)
                return newAccount


def GetIntValMeny(min,max):
    while True:
        try:
            menyVal = int(input("Ange ditt menyval: "))
            print()
            if menyVal >= min and menyVal <= max:
                return menyVal
            else:
                print(f"Du har angett ett felaktigt menyval. Var god ange ett val mellan {min} och {max}.")

        except:
            print(f"Du behöver ange ett val mellan {min} och {max}.")

def ShowMainMenu():
    while True:
        print("* * *  Huvudmeny  * * *")
        print("1. Skapa ett nytt konto")
        print("2. Administrera ett konto")
        print("3. Avsluta")
        print()
        valInMain = GetIntValMeny(1,3)
        return valInMain

def CheckIfSumIsInt(message):
    while True:
        try:
            summa = int(input(f"{message}:"))
            print()
            return summa
        except:
            print("Du måste ange ett nummer.")


accountAndBalance = {}

def CreateAccount():
    GetExistingAccounts()
    while True:
        accountNumber = CheckIfSumIsInt("Ange ditt nya kontonummer")
        print()
        if accountNumber in accountAndBalance:
            print("Kontot existerar redan.")
            print()
            break
        else:
            accountAndBalance[accountNumber] = 0
            print(f"Konto med kontonr: {accountNumber} är skapat!")
            newAccount = accounts(accountNumber, 0)
            return newAccount


def CheckExistingAcc ():
    while True:
        accountNumber = CheckIfSumIsInt("Ange ditt kontonummer")
        print()
        if accountNumber in accountAndBalance:
            return accountNumber
        else:
                print("Ett konto med detta kontonummer finns ej.")
                print()


def ShowAccountMenu():
    account = CheckExistingAcc()
    while True:
        if account == None:
            break
        else:
            print(f"* * *  Kontomeny för konto: {account}  * * *")
            print("1. Ta ut pengar")
            print("2. Sätt in pengar")
            print("3. Kolla saldo")
            print("4. Visa transaktionshistorik")
            print("5. Avsluta")
            print()
            valInAcc = GetIntValMeny(1,5)

            if valInAcc == 1:
                    WithdrawMoney(account)
            elif valInAcc == 2:
                    DepositMoney(account)
            elif valInAcc == 3:
                    CheckBalance(account)
            elif valInAcc == 4:
                PrintTransactionsHistory(account)
            elif valInAcc == 5:
                    break




def WithdrawMoney (account):
    withSum = CheckIfSumIsInt("Ange hur mycket du vill ta ut")
    if withSum < accountAndBalance[account]:
        accountAndBalance[account] -= withSum
        with open (f"{account}.txt", "a") as appendFile:
            appendFile.write(f"kontonr:{account}, datum:{datetime.now().strftime('%Y-%m-%d %H:%M:%S')}, typ:withdraw, summa:{withSum}\n")
    else:
        print("Du har inte tillräckligt med pengar på kontot.")
        print()

def DepositMoney (account):

    depSum = CheckIfSumIsInt("Ange hur mycket du vill sätta in")
    if depSum > 0:
        accountAndBalance[account] += depSum
        with open (f"{account}.txt", "a") as appendFile:
            appendFile.write(f"kontonr:{account}, datum:{datetime.now().strftime('%Y-%m-%d %H:%M:%S')}, typ:deposit, summa:{depSum}\n")

    else:
        print("Du kan inte sätta in 0kr.")
        print()


def CheckBalance (account):

    saldo = accountAndBalance.get(account)
    print(f"Saldo för ditt konto är: {saldo}kr.")
    print()


def PrintTransactionsHistory(account):
    saldo = accountAndBalance.get(account)
    print(f"Nuvarande saldo: {saldo}kr.")
    print()
    with open (f"{account}.txt", "r") as readFile:
        transactionHistory = readFile.readlines()
        for transaction in transactionHistory:
            print(transaction)


def GetExistingAccounts():
    with open("ExistingAccounts.txt", "r") as readFile:
        for line in readFile:
            (key, value) = line.split()
            accountAndBalance[int(key)] = int(value)

def UpdateExistingAccounts():
    with open ("ExistingAccounts.txt", "w") as writeFile:

        updatestring = ""
        for key in accountAndBalance:
            updatestring = updatestring + str(key)
            updatestring = updatestring + " "
            updatestring = updatestring + str(accountAndBalance[key])
            updatestring = updatestring + "\n"
        writeFile.write(updatestring)



def Main():
    print("Hej och välkommen till Carls bankomat")
    print(f"Inloggad klockan: {todayDate}")
    print()


    while True:
        valMainMenu = ShowMainMenu()
        if valMainMenu == 1:
            CreateAccount()
        elif valMainMenu == 2:
            ShowAccountMenu()
        elif valMainMenu == 3:
            print("Programmet avslutas.")
            UpdateExistingAccounts()
            break

# *** SJÄLVA PROGRAMMET ***

Main()