# coding: utf-8

from collections import Counter 
from argparse import ArgumentParser


def checkArguments():
	args = ArgumentParser(description='Cryptanalyst')
	args.add_argument('-f', '--filename', help='Text to analyze')
	args.add_argument('-b', '--bigram', help='Get bigram', action="store_true")
	args.add_argument('-t', '--trigram', help='Get trigram', action="store_true")
	return args.parse_args()

def readFile(filename):
	"""
		This read the file passed in argument and return the data of it
	"""
	text = str()
	with open(filename, 'r') as f:
		data = f.readlines()

		for entry in data:
			text += entry

	return text

def getLetters(text, pos):
	# return Counter(text[idx : idx + pos] for idx in range(len(text) - 1)) 
	###### TODO
	# Sorted by value and to get x data from the dictionary
	return Counter([text[idx: idx + pos] for idx in range(len(text) - 1)])

if __name__ == "__main__":
	args = checkArguments()
	text = readFile(args.filename)

	if args.bigram:
		data = getLetters(text, 2) 
	if args.trigram:
		data = getLetters(text, 3) 

	print(data)