def main_menu(cash_check, vending_machine, inserted_money):
    print("1.Insert a banknote \n"
          "2.Show available products \n"
          "3.Select a product \n"
          "4.Get the change \n")
    n = int(input("Input a figure of operation: "))
    if n == 1:
        inserting(cash_check, inserted_money)
    if n == 2:
        available_product_present(vending_machine)
    if n == 3:
        available_products_cash(cash_check, vending_machine, inserted_money)
    if n == 4:
        get_change(inserted_money, cash_check)


def inserting(check_cash, money):
    banknote = int(input("Please, insert a banknote "))
    if banknote == 50:
        check_cash.insert(FIFTY, 50)
        money += 50
    elif banknote == 100:
        check_cash.insert(HUNDRED, 100)
        money += 100
    elif banknote == 200:
        check_cash.insert(TWO_HUNDRED, 200)
        money += 200
    elif banknote == 500:
        check_cash.insert(FIVE_HUNDRED, 500)
        money += 500
    else:
        print("Invalid banknote. Please, try again")
    return check_cash, money


def available_product_present(vending_machine):
    for it in range(len(vending_machine[NAME])):
            if vending_machine[QUANTITY][it] > 0:
                print(vending_machine[NAME][it], end=' ')
                print(vending_machine[PRICE][it], end=' ')
                print(vending_machine[QUANTITY][it])


# def is_change_available(sum, available_coins):


def available_products_cash(banknotes_check, vending_machine, money):
    if money == 0:
        print("You haven't inserted a banknote. Try again")
    else:
        for item in range(len(vending_machine[PRICE])):
            if money >= vending_machine[PRICE][item] and vending_machine[QUANTITY][item] > 0:
                print(f"Number of {vending_machine[NAME][item]} is {item}")
            choice = int(input("Please, input the number of chosen product: "))
            if choice != " ":
                print(vending_machine[NAME][choice], vending_machine[PRICE][choice], vending_machine[QUANTITY][choice],
                      end=' ')
                vending_machineending_machine[QUANTITY][choice] -= 1
                money -= vending_machine[PRICE][choice]

    return banknotes_check, vending_machine, money


def get_change(money, banknotes_check, check_change, checking):
    for i in range(len(banknotes_check)):
        money += banknotes_check[i]
    if money == 0:
        print("You haven't inserted a banknote. Try again")
    else:
        for i in range(len(check_change)):
            if check_change[i] != 0:
                checking.append(True)
        if checking == [True, True, True, True]:
            print(f"Ten-coin - {money // 10}, five-coin - {money % 10 // 5}, two-coin {money % 5 // 2}, one-coin {money % 1}")
            money = 0
            banknotes_check = [0, 0, 0, 0]
        elif check_change[TEN] == 0:
            print(
                f"There are not left ten-coins, five-coin - {money % 10 // 5}, two-coin {money % 5 // 2}, one-coin "
                f"{money % 1}")
            money = 0
            banknotes_check = [0, 0, 0, 0]
    return money, banknotes_check


machine = [["Milkshake", "TikTak", "Oreo", "Mars", "It"], [90, 50, 120, 75, 300], [15, 15, 15, 15, 15]]
NAME, PRICE, QUANTITY = range(3)
cash = [0, 0, 0, 0]
FIFTY, HUNDRED, TWO_HUNDRED, FIVE_HUNDRED = range(4)
change = [400, 400, 400, 400]
TEN, FIVE, TWO, ONE = range(4)
sum_of_money = 0

while True:
    main_menu(cash, machine, sum_of_money)