from core.Constants import Constants
from core.Errors import UnknownConnectionTypeError
from cli.helpers import get_distribution
from cli.commands import all_commands
from cli.commands import get_set, sync_update
from pathlib import Path
import argparse
import sys


def _handle_exception(identifier, message, traceback):
    if issubclass(identifier, UnknownConnectionTypeError):
        print('Please specify the desired connection method and try again.\n')
    else:
        sys.__excepthook__(identifier, message, traceback)


if __name__ == '__main__':

    Path(Constants.HV_CONFIG_HOME).mkdir(parents=True, exist_ok=True)
    Path(Constants.HV_DATA_HOME).mkdir(parents=True, exist_ok=True)

    sys.excepthook = _handle_exception

    distribution = get_distribution()

    parser = argparse.ArgumentParser(prog=distribution.name)
    parser.add_argument('--version', '-v', action='version', version=f'{distribution.name} v{distribution.version}')
    subparsers = parser.add_subparsers(title='commands', dest='command')

    for command in all_commands:
        command.register(subparsers)

    arguments = parser.parse_args()

    if arguments.command is None:
        parser.print_help()

    elif arguments.command in (get_set.NAME, get_set.NAME_SET):
        get_set.handle(arguments, parser)

    elif arguments.command in (sync_update.NAME_SYNC, sync_update.NAME_UPDATE):
        sync_update.handle(arguments, parser)

    else:
        command = next((c for c in all_commands if getattr(c, 'NAME', None) == arguments.command), None)
        if command:
            command.handle(arguments, parser)