#!/usr/bin/env python

# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
#
# SPDX-License-Identifier: Apache-2.0

# This script is used from the $IDF_PATH/install.* scripts. This way the argument parsing can be done at one place and
# doesn't have to be implemented for all shells.

import argparse
from itertools import chain

try:
    import python_version_checker

    # check the Python version before it will fail with an exception on syntax or package incompatibility.
    python_version_checker.check()
except RuntimeError as e:
    print(e)
    raise SystemExit(1)


def action_extract_features(args: str) -> None:
    """
    Command line arguments starting with "--enable-" are features. This function selects those and prints them.
    """
    features = ['core']  # "core" features should be always installed

    if args:
        arg_prefix = '--enable-'
        features += [arg[len(arg_prefix):] for arg in args.split() if arg.startswith(arg_prefix)]

    print(','.join(features))


def action_extract_targets(args: str) -> None:
    """
    Command line arguments starting with "esp" are chip targets. This function selects those and prints them.
    """
    target_sep = ','
    targets = []

    if args:
        target_args = (arg for arg in args.split() if arg.lower().startswith('esp'))
        # target_args can be comma-separated lists of chip targets

        targets = list(chain.from_iterable(commalist.split(target_sep) for commalist in target_args))

    print(target_sep.join(targets or ['all']))


def main() -> None:
    parser = argparse.ArgumentParser()

    subparsers = parser.add_subparsers(dest='action', required=True)
    extract = subparsers.add_parser('extract', help='Process arguments and extract part of it')

    extract.add_argument('type', choices=['targets', 'features'])
    extract.add_argument('str-to-parse', nargs='?')

    args, unknown_args = parser.parse_known_args()
    # standalone "--enable-" won't be included into str-to-parse

    action_func = globals()['action_{}_{}'.format(args.action, args.type)]
    str_to_parse = vars(args)['str-to-parse'] or ''
    action_func(' '.join(chain([str_to_parse], unknown_args)))


if __name__ == '__main__':
    main()