"""Initialize the package and get dependencies.

SPDX-FileCopyrightText: © 2023 Brian S. Stephan <bss@incorporeal.org>
SPDX-License-Identifier: MIT
"""
import argparse
import importlib
import logging
import os
import pathlib
import sys

import grpc

# dynamically generate version number
try:
    # packaged/pip install -e . value
    from ._version import version as __version__
except ImportError:
    # local clone value
    from setuptools_scm import get_version
    __version__ = get_version(root='..', relative_to=__file__)

# configure basic logging and logger for this module
root = logging.getLogger()
root.setLevel(logging.DEBUG)
handler = logging.StreamHandler(sys.stderr)
formatter = logging.Formatter('%(asctime)s %(levelname)8s [%(name)s] %(message)s')
handler.setFormatter(formatter)
root.addHandler(handler)

logger = logging.getLogger(__name__)

# parse flags that are common to many tools (e.g. adding paths for finding .proto files)
core_parser = argparse.ArgumentParser(add_help=False)
core_parser.add_argument('-v', '--version', action='version', version=f"%(prog)s {__version__}",
                         help="show version information and exit")
core_parser.add_argument('-d', '--debug', action='store_true', help="enable debug logging")
core_parser.add_argument('-P', '--proto-files-path', type=pathlib.Path, default=list(), action='append',
                         help="path to .proto files to read, including dependencies; you will likely need "
                              "to supply this twice, once for GP2040-CE's .proto files and once for nanopb's")
args, _ = core_parser.parse_known_args()
for path in args.proto_files_path:
    sys.path.append(os.path.abspath(os.path.expanduser(path)))

if args.debug:
    handler.setLevel(logging.DEBUG)
else:
    handler.setLevel(logging.WARNING)


def get_config_pb2():
    """Retrieve prebuilt _pb2 file or attempt to compile it live."""
    try:
        return importlib.import_module('config_pb2')
    except ModuleNotFoundError:
        # compile the proto files in realtime, leave them in this package
        logger.info("Invoking gRPC tool to compile config.proto...")
        return grpc.protos('config.proto')