"""Software-only checks for the fixed HTTP-agent offline decoder."""

from __future__ import annotations

import json
from pathlib import Path

import pytest

from tools.rf001_offline_decode import decode_offline


def test_decode_offline_forces_legacy_and_refuses_overwrite(tmp_path: Path) -> None:
    repository = tmp_path / "repo"
    repository.mkdir()
    iq_path = tmp_path / "waveform.cs8"
    truth_path = tmp_path / "truth.json"
    report_path = tmp_path / "report.json"
    iq_path.write_bytes(b"iq")
    truth_path.write_text("{}", encoding="utf-8")
    calls: list[dict[str, object]] = []

    def fake_decoder(iq_file: Path, **options: object) -> dict[str, object]:
        calls.append({"iq_file": iq_file, **options})
        return {"crc_valid_packets": 100, "exact_packets": 100}

    result = decode_offline(
        repository,
        iq_path,
        truth_path,
        report_path,
        decoder=fake_decoder,
    )

    assert result == {"crc_valid_packets": 100, "exact_packets": 100}
    assert calls == [
        {
            "iq_file": iq_path,
            "iq_format": "cs8",
            "truth_metadata_path": truth_path,
            "decoder_backend": "legacy",
            "capture_started_at": None,
            "tx_started_at": None,
            "tx_finished_at": None,
        }
    ]
    assert json.loads(report_path.read_text(encoding="utf-8")) == result
    with pytest.raises(FileExistsError, match="already exists"):
        decode_offline(
            repository,
            iq_path,
            truth_path,
            report_path,
            decoder=fake_decoder,
        )