"""Stage 9 acceptance: a protected scene package, opened from the application.

The container could always read a signed or sealed package, but the application never
passed a verification key or a content-key provider, so a legitimate protected release
was refused with "this package is signed; a verification key is required" — and the only
ways to run it were to ship a plain package or to disable the check. These tests are
about the *wiring*: preferences → ``SceneKeys`` → the loader the pane actually uses.
"""

from __future__ import annotations

import json
from pathlib import Path

import pytest
from orisys_app_shared.scene3d import protect, synthetic
from orisys_app_shared.scene3d.contracts import ExpectedGeometry, ThreeDError
from orisys_app_shared.scene3d.package import write_package
from orisys_studio.scene3d.asset_source import SceneSource, load_package
from orisys_studio.scene3d.keys import (
    PREF_CONTENT_KEY_FILE,
    PREF_CONTENT_KEY_ID,
    PREF_REQUIRE_SIGNATURE,
    PREF_VERIFY_KEY,
    resolve_scene_keys,
)

KEY_ID = "finger-display"
CONTENT_KEY_HEX = "11" * 32


def _expected(scene) -> ExpectedGeometry:
    return ExpectedGeometry(
        "finger", "", scene.geometry_id, scene.field_domain_id, scene.shape_hw
    )


def _keys_and_paths(tmp_path: Path):
    """A signing key pair and a content key file, as a release build would have."""
    private = protect.generate_signing_key()
    public = protect.public_key_pem(private)
    verify_path = tmp_path / "verify.pem"
    verify_path.write_bytes(public)
    key_path = tmp_path / "content.key"
    key_path.write_text(CONTENT_KEY_HEX + "\n", encoding="utf-8")
    provider = protect.MappingKeyProvider({KEY_ID: CONTENT_KEY_HEX})
    return private, public, verify_path, key_path, provider


def _write_signed(tmp_path: Path, scene, *, sealed: bool):
    private, public, verify_path, key_path, provider = _keys_and_paths(tmp_path)
    from orisys_app_shared.scene3d.contracts import Sealing

    target = tmp_path / ("sealed.oryscene" if sealed else "signed.oryscene")
    write_package(
        scene,
        target,
        sealing=Sealing(
            key_id=KEY_ID if sealed else "",
            provider=provider if sealed else None,
            signing_key_pem=private,
            signing_key_reference="stage-9",
            verify_key_pem=public,
        ),
    )
    return target, verify_path, key_path


def _source(path: Path) -> SceneSource:
    return SceneSource(path=path, kind="package", directory=path.parent)


@pytest.mark.parametrize("sealed", (False, True), ids=("signed", "sealed"))
def test_a_protected_package_opens_from_the_application(tmp_path, sealed):
    """The review's R4: the library could read it; the application could not.

    With keys resolved from preferences, the pane's own loader accepts both signed
    and sealed release packages and returns their scene intact.
    """
    scene = synthetic.poc_scene()
    package, verify_path, key_path = _write_signed(tmp_path, scene, sealed=sealed)
    prefs = {PREF_VERIFY_KEY: str(verify_path)}
    if sealed:
        prefs.update(
            {
                PREF_CONTENT_KEY_FILE: str(key_path),
                PREF_CONTENT_KEY_ID: KEY_ID,
            }
        )

    keys = resolve_scene_keys(prefs)
    described = keys.describe()
    assert keys.verify_key_pem is not None
    assert described["verify_key"] is True
    assert CONTENT_KEY_HEX.encode() not in keys.verify_key_pem
    if sealed:
        assert keys.provider is not None
        assert described["content_key"] is True
        assert described["content_key_id"] == KEY_ID
        # The description carries paths and ids, never key material.
        assert CONTENT_KEY_HEX not in json.dumps(described)

    assets = load_package(_source(package), _expected(scene), keys)
    assert assets.geometry_id == scene.geometry_id
    # The writer replaces the synthetic scene's placeholder with the manifest hash.
    assert len(assets.asset_hash) == 64


def test_without_the_verification_key_a_signed_package_is_refused(tmp_path):
    """Not a silent fallback to plain: the refusal names what is missing."""
    scene = synthetic.poc_scene()
    package, _verify_path, _key_path = _write_signed(tmp_path, scene, sealed=False)
    keys = resolve_scene_keys({})
    with pytest.raises(ThreeDError) as excinfo:
        load_package(_source(package), _expected(scene), keys)
    assert excinfo.value.diagnostic.code == "asset_auth_failed"
    assert "verification key" in excinfo.value.diagnostic.message


def test_a_missing_or_unreadable_key_file_is_a_state_not_a_crash(tmp_path):
    """The 2D application must start whatever the key configuration looks like."""
    keys = resolve_scene_keys(
        {
            PREF_VERIFY_KEY: str(tmp_path / "gone.pem"),
            PREF_CONTENT_KEY_FILE: str(tmp_path / "gone.key"),
            PREF_CONTENT_KEY_ID: KEY_ID,
        }
    )
    assert keys.verify_key_pem is None and keys.provider is None
    described = keys.describe()
    assert described["verify_key_error"] == "missing"
    assert described["content_key_error"] == "missing"

    # A key file without a key id is not usable either, and says which half is absent.
    key_path = tmp_path / "content.key"
    key_path.write_text(CONTENT_KEY_HEX, encoding="utf-8")
    keys = resolve_scene_keys({PREF_CONTENT_KEY_FILE: str(key_path)})
    assert keys.provider is None
    assert keys.describe()["content_key_error"] == "no key id configured"


def test_release_mode_refuses_an_unsigned_package(tmp_path):
    """The gate that replaces "ask the engineer to sign it"."""
    scene = synthetic.poc_scene()
    plain = tmp_path / "plain.oryscene"
    write_package(scene, plain)
    release = resolve_scene_keys({PREF_REQUIRE_SIGNATURE: True})
    assert release.require_signature is True
    with pytest.raises(ThreeDError) as excinfo:
        load_package(_source(plain), _expected(scene), release)
    assert excinfo.value.diagnostic.code == "asset_auth_failed"
    assert "requires signed scene packages" in excinfo.value.diagnostic.message

    # The same package is fine in a development build (and the shipped engineering
    # package is exactly this case).
    dev = resolve_scene_keys({})
    assert load_package(_source(plain), _expected(scene), dev).geometry_id == scene.geometry_id


class _InlineExecutor:
    """Runs submitted work immediately: the loader's path without a thread."""

    def submit(self, function, *args, **kwargs):
        from concurrent.futures import Future

        future: Future = Future()
        try:
            future.set_result(function(*args, **kwargs))
        except BaseException as exc:  # noqa: BLE001 - mirrored into the future
            future.set_exception(exc)
        return future

    def shutdown(self, wait: bool = True) -> None:  # noqa: ARG002 - executor contract
        return None


def test_the_scene_loader_passes_the_keys_to_its_worker(qt_app, tmp_path):
    """The pane's loader is where the wiring has to happen, not just ``load_package``."""
    from orisys_studio.scene3d.asset_source import SceneAssetLoader

    scene = synthetic.poc_scene()
    package, verify_path, _key_path = _write_signed(tmp_path, scene, sealed=False)
    keys = resolve_scene_keys({PREF_VERIFY_KEY: str(verify_path)})

    loader = SceneAssetLoader()
    loader._executor = _InlineExecutor()
    loaded: list = []
    failures: list = []
    loader.loaded.connect(
        lambda assets, description, request_id, device: loaded.append(assets)
    )
    loader.failed.connect(lambda item, request_id: failures.append(item))
    try:
        loader.load(_source(package), _expected(scene), keys=keys)
        assert not failures, [item.message for item in failures]
        assert loaded and loaded[0].geometry_id == scene.geometry_id
    finally:
        loader.close()

    # Without them the same file is refused, and the loader reports it rather than
    # raising into the GUI thread.
    loader = SceneAssetLoader()
    loader._executor = _InlineExecutor()
    failures = []
    loader.failed.connect(lambda item, request_id: failures.append(item))
    try:
        loader.load(_source(package), _expected(scene), keys=resolve_scene_keys({}))
        assert failures and failures[0].code == "asset_auth_failed"
    finally:
        loader.close()


def test_the_pane_carries_the_keys_into_its_loader(qt_app):
    from orisys_studio.ui.mesh3d_panel import Mesh3dPanel

    panel = Mesh3dPanel()
    keys = resolve_scene_keys({})
    assert panel.keys() is None
    panel.set_keys(keys)
    assert panel.keys() is keys