"""Common code for CLI subcommands"""

import argparse
import sys

from trovedb import trove_factory, user_env, trove as tr


def display_error(msg: str) -> None:
    print(f"Error: {msg}", file=sys.stderr)


class CliEnv:
    """Environment for CLI subcommands"""
    def __init__(self, verbose: bool = False):
        self.verbose = verbose
        self.local_trove = trove_factory.get_trove(user_env.TROVEBASE) if user_env.TROVEBASE else None

    def checked_trove(self) -> tr.Trove:
        if self.local_trove is None:
            display_error("No local trove found")
            raise SystemExit()
        return self.local_trove

def common_args(parser: argparse.ArgumentParser) -> None:
    parser.add_argument('-v', '--verbose', action='store_true')

def get_env(args: argparse.Namespace) -> CliEnv:
    return CliEnv(args.verbose)