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"""Release gates reject corrupt targets and source references before packaging."""

from __future__ import annotations

import shutil

import pyarrow.parquet as pq
import pytest

from kitti_c2l import release
from kitti_c2l.generate import generate_sequence_rows
from kitti_c2l.sequence_mapping import SequenceInfo
from kitti_c2l.windows import generate_sequence_windows
from kitti_c2l.writer import rows_to_table, windows_to_table


@pytest.fixture
def small_release_table(fake_kitti_root, tmp_path, monkeypatch):
    info = SequenceInfo("04", "2011_09_30", "0016", 0, 3, 4, "train")
    monkeypatch.setattr(release, "load_sequence_mapping", lambda: {"04": info})
    rows = list(generate_sequence_rows(info, fake_kitti_root))
    path = tmp_path / "train.parquet"
    pq.write_table(rows_to_table(rows), path)
    return path, rows, info, fake_kitti_root


def test_release_table_checks_source_calibration(small_release_table):
    path, rows, _, raw_root = small_release_table
    result = release.validate_table(path, kitti_calib_root=raw_root)
    assert result["rows"] == len(rows) == 20
    assert result["sha256"] == release.sha256(path)


@pytest.mark.parametrize(
    "field,value,reason",
    [
        ("sample_seed", 1, "seed"),
        ("raw_frame_index", 99, "raw mapping"),
        ("sample_id", "bad_id", "invalid ID"),
        ("delta_cam_tx_cm", 999.0, "seeded perturbation"),
        ("miscal_t_cam_from_velo_cm", [999.0, 0.0, 0.0], "translation/units"),
        ("gt_R_cam_from_velo", [float("nan")] * 9, "non-finite"),
        ("miscal_R_cam_from_velo", [-1, 0, 0, 0, 1, 0, 0, 0, 1], "reflected"),
        ("stage", None, "null values"),
    ],
)
def test_release_rejects_corrupt_rows(small_release_table, field, value, reason):
    path, rows, _, _ = small_release_table
    rows[0] = rows[0]._replace(**{field: value})
    pq.write_table(rows_to_table(rows), path)
    with pytest.raises(release.ReleaseValidationError, match=reason):
        release.validate_table(path)


@pytest.mark.parametrize("duplicate", [False, True])
def test_release_rejects_missing_or_duplicate_stages(small_release_table, duplicate):
    path, rows, _, _ = small_release_table
    rows = rows + [rows[0]] if duplicate else rows[:-1]
    pq.write_table(rows_to_table(rows), path)
    with pytest.raises(release.ReleaseValidationError, match="duplicate|coverage"):
        release.validate_table(path)


def test_release_checks_short_final_window(small_release_table):
    path, _, info, raw_root = small_release_table
    path = path.with_name("windows_train.parquet")
    rows = list(generate_sequence_windows(info, raw_root))
    pq.write_table(windows_to_table(rows), path)
    assert release.validate_table(path)["rows"] == 5
    rows[0] = rows[0]._replace(window_length=30)
    pq.write_table(windows_to_table(rows), path)
    with pytest.raises(release.ReleaseValidationError, match="window coverage"):
        release.validate_table(path)


def test_release_rejects_materialized_sensor_assets(tmp_path):
    data = tmp_path / "data"
    data.mkdir()
    for name in (*release.DATA_FILES, "frames_train-00000-of-00001.parquet"):
        (data / name).touch()
    with pytest.raises(release.ReleaseValidationError, match="sensor assets are excluded"):
        release.validate_release(tmp_path)


def test_staging_uses_allowlist_and_refuses_overwrite(tmp_path, monkeypatch):
    import scripts.prepare_release as preparation

    root = tmp_path / "source"
    root.mkdir()
    for relative in preparation.RELEASE_FILES:
        destination = root / relative
        destination.parent.mkdir(parents=True, exist_ok=True)
        destination.write_bytes(b"fixture")
    (root / "private-notes.txt").write_text("not for release")
    monkeypatch.setattr(preparation, "validate_release", lambda *args, **kwargs: {})
    output = tmp_path / "public"
    archive = preparation.prepare(root, output)
    assert archive.exists()
    assert {str(p.relative_to(output)) for p in output.rglob("*") if p.is_file()} == set(
        preparation.RELEASE_FILES
    ) | {"SHA256SUMS"}
    with pytest.raises(FileExistsError):
        preparation.prepare(root, output)
    # Identical inputs produce an identical archive despite a different source path/mtime.
    other_root = tmp_path / "other-source"
    shutil.copytree(root, other_root)
    other_output = tmp_path / "again" / "public"
    other_archive = preparation.prepare(other_root, other_output)
    assert release.sha256(archive) == release.sha256(other_archive)


@pytest.fixture
def recorded_hub_release(tmp_path):
    import json
    from pathlib import Path

    source = Path(__file__).resolve().parents[1] / "release/v1"
    destination = tmp_path / "release/v1"
    destination.mkdir(parents=True)
    for name in [
        "hub_manifest.json",
        "manifest.json",
        "HF_DATASET_CARD.md",
        "hub_payload_verification.json",
    ]:
        shutil.copyfile(source / name, destination / name)
    return tmp_path, json.loads((destination / "hub_manifest.json").read_text())


def test_recorded_full_hub_inventory(recorded_hub_release):
    root, _ = recorded_hub_release
    result = release.validate_hub_manifest(root)
    assert len(result["shards"]) == 50
    assert result["total_frames"] == 22400


@pytest.mark.parametrize(
    "problem",
    ["missing_shard", "duplicate_shard", "wrong_frame_count", "changed_metadata", "empty_shard"],
)
def test_full_hub_inventory_rejects_invalid_snapshot(recorded_hub_release, problem):
    import json

    root, report = recorded_hub_release
    if problem == "missing_shard":
        report["shards"].pop()
    elif problem == "duplicate_shard":
        report["shards"][-1] = report["shards"][0]
    elif problem == "wrong_frame_count":
        report["shards"][0]["rows"] += 1
    elif problem == "changed_metadata":
        report["metadata_files"][0]["sha256"] = "0" * 64
    else:
        report["shards"][0]["bytes"] = 0
    (root / "release/v1/hub_manifest.json").write_text(json.dumps(report))
    with pytest.raises(release.ReleaseValidationError):
        release.validate_hub_manifest(root)


def test_full_card_cannot_drop_existing_frames_configuration(recorded_hub_release):
    import yaml

    root, _ = recorded_hub_release
    path = root / "release/v1/HF_DATASET_CARD.md"
    _, header, body = path.read_text().split("---", 2)
    metadata = yaml.safe_load(header)
    metadata["configs"] = [
        config for config in metadata["configs"] if config["config_name"] != "frames"
    ]
    path.write_text("---\n" + yaml.safe_dump(metadata) + "---" + body)
    with pytest.raises(release.ReleaseValidationError, match="all three configs"):
        release.validate_hub_manifest(root)


def test_full_update_keeps_existing_payloads_and_uses_production_card(tmp_path, monkeypatch):
    import json

    import scripts.prepare_release as preparation

    root = tmp_path / "source"
    root.mkdir()
    for relative in preparation.RELEASE_FILES:
        target = root / relative
        target.parent.mkdir(parents=True, exist_ok=True)
        target.write_text("fixture")
    card = root / "release/v1/HF_DATASET_CARD.md"
    card.write_text("production card retaining frames")
    monkeypatch.setattr(preparation, "validate_release", lambda *args, **kwargs: {})
    monkeypatch.setattr(
        preparation,
        "validate_hub_manifest",
        lambda *args: {"repo_id": "owner/dataset", "revision": "a" * 40},
    )
    output = tmp_path / "full-update"
    preparation.prepare(root, output, profile="full-update")
    assert (output / "README.md").read_text() == card.read_text()
    profile = json.loads((output / "release-profile.json").read_text())
    assert profile["requires_existing_frame_shards"] is True
    assert profile["delete_remote_files"] is False
    assert not list((output / "data").glob("frames_*.parquet"))