# -*- coding: utf-8 -*-
# SPDX-FileCopyrightText: 2016-2025 PyThaiNLP Project
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: Apache-2.0
"""Command line helpers."""

import io
import sys
from argparse import ArgumentError, ArgumentParser

sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding="utf-8")
sys.stderr = io.TextIOWrapper(sys.stderr.buffer, encoding="utf-8")

# a command should start with a verb when possible
COMMANDS = sorted(["data", "soundex", "tag", "tokenize", "benchmark"])

CLI_NAME = "thainlp"


def make_usage(command: str) -> dict:
    prog = f"{CLI_NAME} {command}"

    return {"prog": prog, "usage": f"{prog} [options]"}


def exit_if_empty(command: str, parser: ArgumentParser) -> None:
    """Print help and exit if command is empty.

    :param command: command from command line
    :type command: str
    :param parser: parser object of the app
    :type parser: ArgumentParser
    """
    if not command:
        if parser:
            parser.print_help()
        raise ArgumentError(None, "No command provided.")