from __future__ import annotations

import json
import zipfile
from pathlib import Path

import numpy as np
import pytest
from fastapi import APIRouter
from fastapi.routing import APIRoute

from k1link.datasets import (
    DatasetAdmissionError,
    DatasetFrameError,
    dataset_gateway_catalog,
    goose_admission,
    goose_benchmark,
    read_dataset_admission_manifest,
    read_dataset_ground_preview,
    read_dataset_native_scan_preview,
    read_semantic_kitti_frame,
)
from k1link.datasets.goose_admission import admit_goose_validation
from k1link.datasets.goose_benchmark import benchmark_goose_current_ground
from k1link.web.lidar_api import build_lidar_router


def _endpoint(router: APIRouter, path: str) -> object:
    for route in router.routes:
        if isinstance(route, APIRoute) and route.path == path and "GET" in route.methods:
            return route.endpoint
    raise AssertionError(f"GET {path} route is missing")


def test_goose_semantickitti_frame_retains_xyzi_and_packed_labels(
    tmp_path: Path,
) -> None:
    points_path = tmp_path / "frame_vls128.bin"
    labels_path = tmp_path / "frame_goose.label"
    np.asarray(
        [
            [1.0, 2.0, 3.0, 0.25],
            [-4.0, 5.0, 0.5, 0.75],
        ],
        dtype="<f4",
    ).tofile(points_path)
    np.asarray(
        [
            (12 << 16) | 3,
            (99 << 16) | 42,
        ],
        dtype="<u4",
    ).tofile(labels_path)

    frame = read_semantic_kitti_frame(points_path, labels_path)

    assert frame.representation == "native-scan"
    assert frame.point_count == 2
    assert frame.points_xyz_m.tolist() == [[1.0, 2.0, 3.0], [-4.0, 5.0, 0.5]]
    assert frame.remission.tolist() == [0.25, 0.75]
    assert frame.semantic_labels.tolist() == [3, 42]
    assert frame.instance_labels.tolist() == [12, 99]
    assert frame.points_xyz_m.flags.writeable is False


def test_dataset_frame_fails_closed_on_misaligned_or_nonfinite_input(
    tmp_path: Path,
) -> None:
    points_path = tmp_path / "frame.bin"
    labels_path = tmp_path / "frame.label"
    np.asarray([[1.0, 2.0, 3.0, 0.25]], dtype="<f4").tofile(points_path)
    np.asarray([1, 2], dtype="<u4").tofile(labels_path)
    with pytest.raises(DatasetFrameError, match="counts do not match"):
        read_semantic_kitti_frame(points_path, labels_path)

    np.asarray([[np.nan, 2.0, 3.0, 0.25]], dtype="<f4").tofile(points_path)
    np.asarray([1], dtype="<u4").tofile(labels_path)
    with pytest.raises(DatasetFrameError, match="non-finite"):
        read_semantic_kitti_frame(points_path, labels_path)


def test_dataset_gateway_enforces_d_storage_and_representation_boundaries(
    tmp_path: Path,
) -> None:
    blocked = dataset_gateway_catalog(tmp_path / "datasets")
    admitted = dataset_gateway_catalog(Path("/mnt/d/NDC_MISSIONCORE/datasets"))

    assert blocked["storage"]["status"] == "blocked-storage-policy"  # type: ignore[index]
    assert admitted["storage"]["status"] == "ready"  # type: ignore[index]
    assert admitted["next_action"] == "download-goose-validation-to-d"
    representations = admitted["representations"]
    assert isinstance(representations, list)
    assert [item["id"] for item in representations] == [  # type: ignore[index]
        "native-scan",
        "normalized-scan",
        "rolling-local-map",
    ]
    inputs = admitted["known_inputs"]
    assert isinstance(inputs, list)
    assert inputs[0]["admitted_for_patchworkpp"] is False  # type: ignore[index]


def test_dataset_gateway_api_is_read_only_and_path_free(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    monkeypatch.setenv("MISSIONCORE_DATASET_ROOT", "/mnt/d/NDC_MISSIONCORE/datasets")
    route = _endpoint(build_lidar_router(), "/api/v1/lidar/dataset-gateway")
    response = route()  # type: ignore[operator]

    assert response["schema_version"] == "missioncore.dataset-gateway-catalog/v2"
    assert response["access"] == "read-only"
    assert response["storage"]["admitted"] is True
    assert response["storage"]["path_exposed"] is False
    assert "/mnt/d/NDC_MISSIONCORE/datasets" not in repr(response).replace(
        response["storage"]["required_wsl_root"],  # type: ignore[index]
        "",
    )


def _downloading_manifest() -> dict[str, object]:
    return {
        "schema_version": "missioncore.dataset-admission/v1",
        "source_id": "goose-3d/v2025-08-22",
        "observed_at_utc": "2026-07-25T10:00:00Z",
        "status": "downloading",
        "storage": {
            "policy": "worker-d-only",
            "admitted": True,
            "canonical_root": True,
            "path_exposed": False,
        },
        "archive": {
            "filename": "goose_3d_val.zip",
            "source_url": "https://goose-dataset.de/storage/goose_3d_val.zip",
            "bytes_transferred": 512,
            "total_bytes": 1024,
            "size_bytes": None,
            "sha256": None,
            "integrity": "pending",
            "vendor_checksum_available": False,
        },
        "license": {
            "spdx": "CC-BY-SA-4.0",
            "artifact_present": False,
        },
        "frame": None,
        "next_action": "complete-download-and-admit",
    }


def test_dataset_gateway_uses_worker_manifest_instead_of_static_download_state(
    tmp_path: Path,
) -> None:
    manifest_path = tmp_path / "admission.json"
    manifest_path.write_text(json.dumps(_downloading_manifest()), encoding="utf-8")

    catalog = dataset_gateway_catalog(
        tmp_path / "not-worker-d",
        admission_manifest_path=manifest_path,
    )

    assert catalog["storage"]["admitted"] is True  # type: ignore[index]
    assert catalog["storage"]["attestation"] == "worker-manifest"  # type: ignore[index]
    source = catalog["sources"][0]  # type: ignore[index]
    assert source["admission"]["status"] == "downloading"  # type: ignore[index]
    assert source["admission"]["archive"]["bytes_transferred"] == 512  # type: ignore[index]
    assert catalog["next_action"] == "complete-download-and-admit"


def test_dataset_admission_manifest_fails_closed_on_forged_storage(
    tmp_path: Path,
) -> None:
    manifest = _downloading_manifest()
    manifest["storage"]["path_exposed"] = True  # type: ignore[index]
    path = tmp_path / "admission.json"
    path.write_text(json.dumps(manifest), encoding="utf-8")

    with pytest.raises(DatasetAdmissionError, match="storage admission"):
        read_dataset_admission_manifest(path)


def test_goose_admission_extracts_one_aligned_frame_and_bounded_preview(
    tmp_path: Path,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    root = tmp_path / "datasets"
    archive = root / "goose-3d/v2025-08-22/archives/goose_3d_val.zip"
    archive.parent.mkdir(parents=True)
    points = np.asarray(
        [
            [1.0, 2.0, 3.0, 0.25],
            [-4.0, 5.0, 0.5, 0.75],
            [2.0, 1.0, -0.2, 0.5],
        ],
        dtype="<f4",
    )
    packed_labels = np.asarray([23, 38, 31], dtype="<u4")
    mapping = (
        "class_name,label_key,has_instance,hex,challege_category_id,"
        "challenge_category_name\n"
        "asphalt,23,0,#ff2f80,2,artificial_ground\n"
        "soil,31,0,#d16100,3,natural_ground\n"
        "building,38,0,#013349,1,artificial_structures\n"
    )
    with zipfile.ZipFile(archive, "w") as target:
        target.writestr(
            "goose/velodyne/val/scene/2026_frame_vls128.bin",
            points.tobytes(),
        )
        target.writestr(
            "goose/labels/val/scene/2026_frame_goose.label",
            packed_labels.tobytes(),
        )
        target.writestr("goose/goose_label_mapping.csv", mapping)
        target.writestr(
            "goose/LICENSE",
            "Creative Commons Attribution-ShareAlike 4.0 International",
        )
    monkeypatch.setattr(goose_admission, "GOOSE_ARCHIVE_OBSERVED_BYTES", archive.stat().st_size)
    monkeypatch.setattr(goose_admission, "_is_canonical_worker_root", lambda _: True)

    manifest = admit_goose_validation(root, archive_path=archive, preview_points=2)

    assert manifest["status"] == "frame-ready"
    assert manifest["frame"]["frame_id"] == "2026_frame"
    assert manifest["frame"]["point_count"] == 3
    assert manifest["frame"]["ground_truth_ground_points"] == 2
    state_path = root / "state/goose-3d-v2025-08-22.json"
    assert read_dataset_admission_manifest(state_path)["status"] == "frame-ready"
    digest = manifest["archive"]["sha256"]
    preview_path = root / f"goose-3d/v2025-08-22/installs/{digest}/previews/2026_frame.json"
    preview = read_dataset_native_scan_preview(preview_path)
    assert preview["point_count"] == 2
    assert len(preview["semantic_rgb_0_to_255"]) == 6
    assert preview["safety"]["navigation_or_safety_accepted"] is False


def test_dataset_preview_api_is_read_only_and_integrity_checked(
    tmp_path: Path,
) -> None:
    preview_path = tmp_path / "preview.json"
    preview_path.write_text(
        json.dumps(
            {
                "schema_version": "missioncore.dataset-native-scan-preview/v1",
                "source_id": "goose-3d/v2025-08-22",
                "frame_id": "frame-1",
                "representation": "native-scan",
                "sampling": "deterministic-even-index",
                "source_point_count": 1,
                "point_count": 1,
                "points_xyz_m": [[1.0, 2.0, 3.0]],
                "remission_0_to_255": [128],
                "semantic_label_ids": [23],
                "semantic_rgb_0_to_255": [255, 47, 128],
                "ground_truth_ground": [1],
                "classes": [
                    {
                        "label_id": 23,
                        "class_name": "asphalt",
                        "hex": "#ff2f80",
                        "challenge_category_id": 2,
                        "challenge_category_name": "artificial_ground",
                    }
                ],
                "safety": {
                    "visualization_only": True,
                    "navigation_or_safety_accepted": False,
                },
            }
        ),
        encoding="utf-8",
    )
    router = build_lidar_router(
        dataset_admission_provider=lambda: None,
        dataset_preview_provider=lambda: preview_path,
    )
    route = _endpoint(router, "/api/v1/lidar/dataset-gateway/preview")

    response = route()  # type: ignore[operator]

    assert response["frame_id"] == "frame-1"


def test_goose_current_ground_is_scored_against_independent_labels(
    tmp_path: Path,
    monkeypatch: pytest.MonkeyPatch,
) -> None:
    root = tmp_path / "datasets"
    digest = "a" * 64
    frame_id = "frame-1"
    install = root / f"goose-3d/v2025-08-22/installs/{digest}"
    frame_root = install / f"frames/{frame_id}"
    frame_root.mkdir(parents=True)
    np.asarray(
        [
            [-1.0, 0.0, 0.00, 0.1],
            [0.0, 0.0, 0.02, 0.2],
            [1.0, 0.0, 0.01, 0.3],
            [0.0, 0.2, 1.50, 0.4],
        ],
        dtype="<f4",
    ).tofile(frame_root / "points.bin")
    np.asarray([23, 31, 23, 38], dtype="<u4").tofile(frame_root / "labels.label")
    (install / "goose_label_mapping.csv").write_text(
        "class_name,label_key,has_instance,hex\n"
        "asphalt,23,0,#ff2f80\n"
        "soil,31,0,#d16100\n"
        "building,38,0,#013349\n",
        encoding="utf-8",
    )
    state = {
        "schema_version": "missioncore.dataset-admission/v1",
        "source_id": "goose-3d/v2025-08-22",
        "observed_at_utc": "2026-07-25T10:00:00Z",
        "status": "frame-ready",
        "storage": {
            "policy": "worker-d-only",
            "admitted": True,
            "canonical_root": True,
            "path_exposed": False,
        },
        "archive": {
            "filename": "goose_3d_val.zip",
            "source_url": "https://goose-dataset.de/storage/goose_3d_val.zip",
            "bytes_transferred": 1024,
            "total_bytes": 1024,
            "size_bytes": 1024,
            "sha256": digest,
            "integrity": "zip-structure-and-content-digest",
            "vendor_checksum_available": False,
        },
        "license": {"spdx": "CC-BY-SA-4.0", "artifact_present": True},
        "frame": {
            "frame_id": frame_id,
            "representation": "native-scan",
            "point_count": 4,
            "semantic_class_count": 3,
            "ground_truth_ground_points": 3,
            "ground_truth_ground_fraction": 0.75,
            "preview_point_count": 4,
            "preview_sha256": "b" * 64,
            "preview_available": True,
        },
        "next_action": "review-first-native-scan",
    }
    state_path = root / "state/goose-3d-v2025-08-22.json"
    state_path.parent.mkdir(parents=True)
    state_path.write_text(json.dumps(state), encoding="utf-8")
    monkeypatch.setattr(goose_benchmark, "_is_worker_dataset_root", lambda _: True)

    report = benchmark_goose_current_ground(root, preview_points=4)

    assert report["ground_truth"]["evaluated_points"] == 4
    assert 0 <= report["metrics"]["ground_iou"] <= 1
    assert report["decision"]["promoted"] is False
    output = (
        install
        / "benchmarks"
        / f"current-ground-{report['identity_sha256']}"
        / "preview.json"
    )
    preview = read_dataset_ground_preview(output)
    assert preview["point_count"] == 4
    assert len(preview["disagreement"]) == 4