import AlphabetUtils as au


def calculate_frequency(text: str, fancy_printing: bool = False):
	"""
	Calculates the frequency of every letter in the german alphabet for the given text
	:param text: The text to calculate the letter frequency for
	:return: A list of frequencies, where index 0 contains the frequency of a in percent and so on.
	"""
	occurrence_count = [0 for i in range(26)]

	for char in text:
		if au.is_letter_of_alphabet(char):
			char_index = au.get_index_of_letter(char)
			occurrence_count[char_index] += 1

	occurrence_frequency = []

	for count in occurrence_count:
		occurrence_frequency.append(count / len(text))

	if fancy_printing:
		for i in range(26):
			print(f'{au.get_letter_at_index(i, True)}: {occurrence_frequency[i] * 100}%')

	return occurrence_frequency


if __name__ == '__main__':
	print(
		calculate_frequency('Hier den Text eingeben, für den die Wahrscheinlichkeiten berechnet werden sollen', True))