computer_store

def is_price_positive_number(tax_):
    return tax_ >= 0


def increase_taxes_with_twenty_percent(prices_without_taxes_, prices_with_taxes_):
    prices_with_taxes_ = [price * 1.20 for price in prices_without_taxes_]
    return prices_with_taxes_


def take_ten_percent_of_discount(total_sum_, prices_with_taxes_):
    total_sum_ = total_sum_ * 0.9
    return total_sum_


def take_taxes(taxes_, prices_without_taxes_, prices_with_taxes_):
    taxes_ = sum(prices_with_taxes_) - sum(prices_without_taxes_)
    return taxes_


def print_result(total_price_without_taxes_, taxes_, total_sum_):
    return print("Congratulations you've just bought a new computer!\n"
                 f"Price without taxes: {total_price_without_taxes_:.2f}$\n"
                 f"Taxes: {taxes_:.2f}$\n"
                 "-----------\n"
                 f"Total price: {total_sum_:.2f}$")


def computer_store():
    prices_without_taxes = []
    prices_with_taxes = []
    taxes = 0
    type_of_customer = ""

    while True:
        command = input()
        if command == "special":
            type_of_customer = "special"
            break
        elif command == "regular":
            type_of_customer = "regular"
            break
        current_tax = float(command)

        if not is_price_positive_number(current_tax):
            print("Invalid price!")
            continue

        prices_without_taxes.append(current_tax)

    if prices_without_taxes:
        total_price_without_taxes = sum(prices_without_taxes)
        prices_with_taxes = increase_taxes_with_twenty_percent(prices_without_taxes, prices_with_taxes)
        taxes = take_taxes(taxes, prices_without_taxes, prices_with_taxes)
        total_sum = sum(prices_with_taxes)
        if type_of_customer == "special":
            total_sum = take_ten_percent_of_discount(total_sum, prices_with_taxes)

        print_result(total_price_without_taxes, taxes, total_sum)

    else:
        print("Invalid order!")


computer_store()







##########################################################################################


# price_without_task = 0
# while True:
#     command = input()
#
#     if command == 'special' or command == 'regular':
#         break
#
#     price = float(command)
#     if price < 0:
#         print('Invalid price!')
#         continue
#
#     price_without_task += price
#
# taxes = price_without_task * 0.2
# final_price = price_without_task + taxes
#
# if command == 'special':
#     if price_without_task > 0:
#         discount = final_price * 0.1
#         final_price = final_price - discount
#         print(f"Congratulations you've just bought a new computer!\n"
#               f"Price without taxes: {price_without_task:.2f}$\n"
#               f"Taxes: {taxes:.2f}$\n"
#               f"-----------\n"
#               f"Total price: {final_price:.2f}$")
#     else:
#         print('Invalid order!')
#
# elif command == 'regular':
#     if price_without_task > 0:
#         print(f"Congratulations you've just bought a new computer!\n"
#               f"Price without taxes: {price_without_task:.2f}$\n"
#               f"Taxes: {taxes:.2f}$\n"
#               f"-----------\n"
#               f"Total price: {final_price:.2f}$")
#     else:
#         print('Invalid order!')