"""
Copyright © 2022 Noah Vogt <noah@noahvogt.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""

import sys

from utils import log, error_msg, expand_dir


def parse_argv_as_tuple() -> tuple:
    try:
        song_file_path = sys.argv[1]
        output_dir = expand_dir(sys.argv[2])
    except IndexError:
        error_msg("incorrect amount of arguments provided, exiting...")
    try:
        chosen_structure = sys.argv[3]
        if chosen_structure.strip() == "":
            chosen_structure = ""
    except IndexError:
        chosen_structure = ""

    log("parsing {}...".format(song_file_path))
    return song_file_path, output_dir, chosen_structure