# weight temperature height
import questionary


def is_float(s):
    """
    Checks if a given string can be successfully converted to a float.

    Args:
        s: The string to check.

    Returns:
        True if the string is a valid float, False otherwise.
    """
    try:
        float(s)
        return True
    except ValueError:
        return False


def weight():
    way = questionary.select("Which way?", ["kg to lb", "lb to kg", "Back"]).ask()
    if way == "kg to lb":
        weight = questionary.text(
            "Enter the kg weight:",
            validate=lambda text: True if is_float(text) else False,
        ).ask()
        print("Your converted weight is:", round(float(weight) * 2.2, 2))
    elif way == "lb to kg":
        weight = questionary.text(
            "Enter the lb weight:",
            validate=lambda text: True if is_float(text) else False,
        ).ask()
        print("Your converted weight is:", round(float(weight) / 2.2, 2))


def temperature():
    way = questionary.select("Which way?", ["C to F", "F to C", "Back"]).ask()
    if way == "C to F":
        temp = questionary.text(
            "Enter the C temperature:",
            validate=lambda text: True if is_float(text) else False,
        ).ask()
        print("Your converted temperature is:", round((float(temp) * 1.8) + 32, 2))
    elif way == "F to C":
        temp = questionary.text(
            "Enter the F temperature:",
            validate=lambda text: True if is_float(text) else False,
        ).ask()
        print("Your converted temperature is:", round((float(temp) - 32) * 5 / 9, 2))


def height():
    way = questionary.select("Which way?", ["in to cm", "cm to in", "Back"]).ask()
    if way == "in to cm":
        height = questionary.text(
            "Enter the in height:",
            validate=lambda text: True if is_float(text) else False,
        ).ask()
        print("Your converted height is:", round(float(height) * 2.54, 2))
    elif way == "cm to in":
        height = questionary.text(
            "Enter the cm height:",
            validate=lambda text: True if is_float(text) else False,
        ).ask()
        print("Your converted height is:", round(float(height) / 2.54, 2))


def main():
    while True:
        choice = questionary.select(
            "Which type of unit do you want to convert?",
            ["Weight", "Temperature", "Height", "Exit"],
        ).ask()
        if choice == "Exit":
            break
        if choice == "Weight":
            weight()
        elif choice == "Temperature":
            temperature()
        elif choice == "Height":
            height()


if __name__ == "__main__":
    main()