# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.

import argparse
import sys


def _normalize_spaces(line):
    return ' '.join(line.split())


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('-i', '--input_file', required=True, type=str)
    parser.add_argument('-n', '--repeat_times', required=True, type=int)
    parser.add_argument('-o', '--output_file', required=False, type=str)
    args = parser.parse_args()
    stream = open(args.output_file, 'w', encoding='utf-8') if args.output_file else sys.stdout

    for line in open(args.input_file, 'r', encoding='utf-8'):
        for _ in range(args.repeat_times):
            stream.write(_normalize_spaces(line) + '\n')


if __name__ == '__main__':
    main()
