#!/usr/bin/env python3

import sys
import re

SEPARATORS = [' ', '\n', 's']


def get_args():
    """ Get command line arguments """

    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument("-m", "--macros", default=["macros"], action="append")
    parser.add_argument("input")
    parser.add_argument("output")
    return parser.parse_args()


def main(args):
    """ Entry point for script """
    macros = []
    for macro_file in args.macros:
        with open(macro_file) as file:
            macros += [x.split('\t') for x in file.read().split('\n')]

    for index, macro in enumerate(macros):
        if len(macro) != 2:
            macros.pop(index)
            continue
        macros[index] = tuple(macros[index])

    macros.sort(key=lambda tup: len(tup[0]), reverse=True)
    
    with open(args.input) as file:
        input = file.read()

    for macro in macros:
        pattern, repl = macro
        print(macro)
        for separator in SEPARATORS:
            input = input.replace(pattern + separator, repl + separator)

    output = input

    with open(args.output, 'w+') as file:
        file.write(output)

    print(output)

    return 0


if __name__ == '__main__':
    try:
        sys.exit(main(get_args()))
    except KeyboardInterrupt:
        sys.exit(0)