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# License: Apache-2.0 License
# Created by: Patrick Lumbantobing, VertoX-AI
# Copyright (c) 2026 VertoX-AI. All rights reserved.
#
# This work is licensed under the Apache-2.0 License.
# To view a copy of this license, visit
# https://www.apache.org/licenses/LICENSE-2.0

"""Compose the thin command-line interface and translate typed errors to exit codes."""

from __future__ import annotations

import argparse
import sys
from collections.abc import Sequence

from speech_text_data_aligners.cli import annotate as annotate_cli
from speech_text_data_aligners.cli import benchmark as benchmark_cli
from speech_text_data_aligners.cli import readiness as readiness_cli
from speech_text_data_aligners.core.errors import SpeechTextAlignerError


def build_parser() -> argparse.ArgumentParser:
    """Build the complete CLI parser without constructing a concrete backend.

    Returns:
        Configured top-level parser with annotation, benchmark, and offline readiness subcommands.

    """
    parser = argparse.ArgumentParser(prog="speech-text-aligners")
    subparsers = parser.add_subparsers(dest="command", required=True)
    annotate_cli.configure_parser(subparsers.add_parser("annotate"))
    benchmark_cli.configure_parser(subparsers.add_parser("benchmark"))
    readiness_cli.configure_parser(subparsers.add_parser("readiness"))
    return parser


def main(argv: Sequence[str] | None = None) -> int:
    """Parse CLI arguments, invoke the selected adapter, and return an exit status.

    Parameters
    ----------
        argv: Optional explicit argument sequence; defaults to process arguments.

    Returns
    -------
        Zero on success or two after a safely reportable project error.

    Side Effects:
        Delegated commands may create artifacts; typed errors are written to stderr.

    """
    args = build_parser().parse_args(argv)
    try:
        return int(args.handler(args))
    except SpeechTextAlignerError as error:
        print(f"error: {error}", file=sys.stderr)
        return 2


if __name__ == "__main__":
    raise SystemExit(main())