import re


def remove_profanity(text):
    remove_words = ["fuck", "Fuck", "shit", "rape", "bastard", "bitch"]
    for word in remove_words:
        text = text.replace(word, "****")
        
    return text


def all_replace(text):
    text = first_to_second_person(text)
    text = text.replace("#","")
    
    text = remove_profanity(text)
    
    return text
    
    
def action_replace(text):
    return all_replace(text)
    
    
def story_replace(text):
    return all_replace(text)
    
    
def split_first_sentence(text):
    first_period = text.find('.')
    first_exclamation = text.find('!')
    
    if first_exclamation < first_period and first_exclamation > 0:
        split_point = first_exclamation+1
    elif first_period > 0:
        split_point = first_period+1
    else:
        split_point = text[0:20]
        
    return text[0:split_point], text[split_point:]

    
def cut_trailing_sentence(text):
    last_period = text.rfind('.')
    last_exclamation = text.rfind('!')
    
    if last_exclamation > last_period:
        text = text[0:last_exclamation+1]
    elif last_period > 0:
        text = text[0:last_period+1]

    return text


def replace_outside_quotes(text, current_word, repl_word):

    reg_expr = re.compile(current_word + '(?=([^"]*"[^"]*")*[^"]*$)')

    output = reg_expr.sub(repl_word, text)
    return output


first_to_second_mappings = [
    ("I am", "you are"),
    ("I ", "you "),
    ("I've", "You've"),
    ("my", "your"),
    ("we ","you "),
    ("We ","You "),
    (" mine"," yours"),
]

second_to_first_mappings = [
    ("Your", "My"),
    ("your", "my"),
    ("you are", "I am"),
    ("You are", "I am"),
    ("You", "I"),
    ("you", "I"),
]

def capitalize_helper(string):
    string_list = list(string)
    string_list[0] = string_list[0].upper()
    return "".join(string_list)


def capitalize_first_letters(text):
    first_letters_regex = re.compile(r'((?<=[\.\?!]\s)(\w+)|(^\w+))')

    def cap(match):
        return (capitalize_helper(match.group()))

    result = first_letters_regex.sub(cap, text)
    return result


def first_to_second_person(text):
    for pair in first_to_second_mappings:
        text = replace_outside_quotes(text, pair[0], pair[1])

    return capitalize_first_letters(text)


def second_to_first_person(text):
    for pair in second_to_first_mappings:
        text = replace_outside_quotes(text, pair[0], pair[1])

    return capitalize_first_letters(text)

if __name__ == '__main__':
    f = open("test.txt", "r")
    test_text = f.read()

    print("Text is \n\n",test_text)

    print("First person: ")
    converted = second_to_first_person(test_text)
    print(converted)

    print("Back to second person: ")
    print(first_to_second_person(converted))