#!/usr/bin/python3
import re

def countLines(file="phil.txt"):
    count = sum(1 if not re.match(r"^\s*$", line) else 0 for line in open(file, 'r'))
    return count

def countWords(file="phil.txt"):
    with open(file, 'r') as f:
        count = len(f.read().split())
    return count

def countLetters(file="phil.txt"):
    with open(file, 'r') as f:
        count = len(re.findall(r"\w", f.read()))
    return count

def frequency(pattern, file="phil.txt", top=7):
    unique = {}
    with open(file, 'r') as f:
        matches = re.findall(pattern, f.read().lower())
        count = len(matches)
        for word in matches:
            if word not in unique:
                unique[word] = 0
            unique[word] += 1

    output = []
    temp = sorted(unique.items(), key = lambda x: x[1], reverse=True)
    for _, val in enumerate(temp):
        percent = (val[1] / count) * 100
        output.append("'{0}': {1} | {2:.1f}%".format(val[0], val[1], percent))
    return "\n".join(output[:top])

def wordFrequency(file="phil.txt", top=7):
    return frequency(r"\b\w+\b", file, top)

def letterFrequency(file="phil.txt", top=7):
    return frequency(r"\w", file, top)

def listAll(file="phil.txt", top=7):
    output = {
        "lines": countLines(file),
        "words": countWords(file),
        "letters": countLetters(file),
        "word_frequency": wordFrequency(file, top),
        "letter_frequency": letterFrequency(file, top),
    }

    return "\n".join(["{}:\n{}".format(key, val) for key, val in output.items()])

def goodbye():
    return "Good bye!"

def present(menu):
    output = []
    for key, val in enumerate(menu):
        output.append("{} - {}".format(key+1, val))
    return "Available choices:\n{}".format("\n".join(output))

def main(args):
    menu = {
        "q": goodbye,
        "all": listAll,
        "lines": countLines,
        "words": countWords,
        "letters": countLetters,
        "wfreq": wordFrequency,
        "lfreq": letterFrequency,
    }
    show = present(menu)
    choice = ""
    while choice != "q":
        print(show)
        choice = input("--> ")
        if choice in menu:
            print(menu[choice]())

if __name__ == "__main__":
    import sys
    main(sys.argv[1:])