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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

"""Adapt benchmark CLI arguments to reusable application/report services."""

from __future__ import annotations

import argparse
import json
from pathlib import Path

from speech_text_data_aligners.application.benchmark import (
    BenchmarkOptions,
    benchmark_backends,
)
from speech_text_data_aligners.backends.registry import (
    BackendRegistry,
    default_backend_registry,
)
from speech_text_data_aligners.benchmarking.reports import (
    preflight_report_bundle,
    render_report,
    write_report_bundle,
)
from speech_text_data_aligners.core.errors import ConfigurationError


def configure_parser(parser: argparse.ArgumentParser) -> None:
    """Add benchmark composition/presentation arguments to a subcommand parser.

    Parameters
    ----------
        parser: Parser owned by the CLI composition root.

    Side Effects:
        Registers arguments and the command handler on ``parser``.

    """
    parser.add_argument("metadata_csv", type=Path)
    parser.add_argument("reference_csv", type=Path)
    parser.add_argument("audio_dir", type=Path)
    parser.add_argument("--backend", action="append", required=True)
    parser.add_argument("--backend-config-json", default="{}")
    parser.add_argument("--strict", action="store_true")
    parser.add_argument("--output-base", type=Path)
    parser.add_argument("--overwrite", action="store_true")
    parser.add_argument(
        "--format", choices=("json", "csv", "markdown"), default="markdown"
    )
    parser.set_defaults(handler=run)


def run(
    args: argparse.Namespace,
    *,
    registry: BackendRegistry | None = None,
) -> int:
    """Construct selected backends and delegate benchmark work to library services.

    Parameters
    ----------
        args: Parsed benchmark arguments.
        registry: Optional injected lazy registry for tests/custom composition.

    Returns
    -------
        Zero after writing a bundle or printing the requested report format.

    Raises
    ------
        ConfigurationError: If backend names repeat or configuration JSON is invalid.
        SpeechTextAlignerError: Propagated typed construction/report/service failures.

    Side Effects:
        Calls backends and either writes a report bundle or prints one report to stdout.

    """
    if len(args.backend) != len(set(args.backend)):
        raise ConfigurationError("benchmark backend names must be unique")
    try:
        config = json.loads(args.backend_config_json)
    except json.JSONDecodeError as error:
        raise ConfigurationError("backend configuration is not valid JSON") from error
    if not isinstance(config, dict):
        raise ConfigurationError("backend configuration JSON must be an object")
    if args.output_base is not None:
        # Reserve all report paths before factories can initialize costly backends.
        preflight_report_bundle(
            args.output_base,
            metadata_csv=args.metadata_csv,
            reference_csv=args.reference_csv,
            overwrite=args.overwrite,
        )
    selected_registry = registry or default_backend_registry()
    backends = {
        name: selected_registry.create(name, config=config.get(name, {}))
        for name in args.backend
    }
    report = benchmark_backends(
        backends=backends,
        metadata_csv=args.metadata_csv,
        reference_csv=args.reference_csv,
        audio_dir=args.audio_dir,
        options=BenchmarkOptions(strict=args.strict),
    )
    if args.output_base is not None:
        write_report_bundle(
            report,
            args.output_base,
            metadata_csv=args.metadata_csv,
            reference_csv=args.reference_csv,
            overwrite=args.overwrite,
        )
    else:
        print(render_report(report, args.format), end="")
    return 0