"""Release packaging and provenance guarantees added in v1.2.1.

Two defects reached production before these existed, and both were invisible to every gate the
project had. Neither was a code bug: the source was correct in both cases and the *artifact* was
wrong, which is precisely the class of failure a unit test looking at source cannot see.

**The console could not reach its own API.** Vite inlines ``VITE_*`` at build time, but
``release_build.py`` never passed ``VITE_API_BASE_URL``, so every release image compiled the
Dockerfile's development default — ``http://localhost:8000`` — into an immutable bundle, and the
nginx CSP, derived from the same argument, hardcoded the same wrong origin. The frontend test suite
passed because jsdom never performs a cross-origin fetch; the release gate passed because it
inspects labels and checksums, not bundle contents. It surfaced only when a human opened the
production console.

**The Node Agent's identity drifted from its tag.** ``docker-compose.node-agent.yml`` declared a
``build:`` block with no ``args:``, so a Compose-built agent got version ``0.0.0`` and empty
revision/created labels while still being tagged from ``MODELFORGE_VERSION``. Production ran an
image tagged ``1.1.1`` whose contents were ``1.2.0`` and whose OCI labels were blank.

These tests read the actual release inputs — the Dockerfiles, the Compose projections and the
release builder — so the same two failures cannot ship again without failing here first.
"""

from __future__ import annotations

import re
from pathlib import Path

import pytest
import yaml

from modelforge_api.domain.release import PRODUCT_VERSION

ROOT = Path(__file__).resolve().parents[2]
RELEASE_BUILD = ROOT / "scripts" / "release_build.py"
FRONTEND_DOCKERFILE = ROOT / "frontend" / "Dockerfile"
NODE_AGENT_DOCKERFILE = ROOT / "node-agent" / "Dockerfile"

#: Every image the release builder publishes. The Runtime Worker is a first-class private runtime
#: artifact even though it exposes no public listener.
RELEASE_IMAGES = (
    "modelforge-api",
    "modelforge-web",
    "modelforge-node-agent",
    "modelforge-runtime-worker",
)

#: The OCI fields a release image must carry for an operator to trace it back to a commit.
REQUIRED_OCI_LABELS = (
    "org.opencontainers.image.title",
    "org.opencontainers.image.version",
    "org.opencontainers.image.revision",
    "org.opencontainers.image.created",
    "org.opencontainers.image.source",
)


def _release_build_source() -> str:
    return RELEASE_BUILD.read_text(encoding="utf-8")


def _compose(name: str) -> dict:
    return yaml.safe_load((ROOT / name).read_text(encoding="utf-8"))


# --------------------------------------------------------------- console API origin (defect A)


def test_the_release_builder_requires_an_explicit_public_api_origin() -> None:
    """No origin, no release. The default that shipped v1.2.0 was a development convenience."""

    source = _release_build_source()
    assert "--public-api-origin" in source
    assert "MODELFORGE_PUBLIC_API_ORIGIN" in source
    assert "def normalise_public_api_origin" in source


def test_a_release_build_without_an_api_origin_fails_closed() -> None:
    import importlib.util

    spec = importlib.util.spec_from_file_location("modelforge_release_build", RELEASE_BUILD)
    assert spec and spec.loader
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)

    for empty in ("", "   "):
        with pytest.raises(SystemExit) as raised:
            module.normalise_public_api_origin(empty)
        assert "public API origin" in str(raised.value)


@pytest.mark.parametrize(
    "value",
    [
        "localhost:8000",  # no scheme: ambiguous, and how the original default looked
        "ftp://example.com",
        "https://",
        "https://example.com/api",  # a path would be appended twice
        "https://example.com?x=1",
    ],
)
def test_a_malformed_api_origin_is_refused(value: str) -> None:
    import importlib.util

    spec = importlib.util.spec_from_file_location("modelforge_release_build", RELEASE_BUILD)
    assert spec and spec.loader
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    with pytest.raises(SystemExit):
        module.normalise_public_api_origin(value)


@pytest.mark.parametrize(
    ("given", "expected"),
    [
        ("https://modelforge.example.com", "https://modelforge.example.com"),
        ("http://192.0.2.10:18000/", "http://192.0.2.10:18000"),
        ("  https://example.com  ", "https://example.com"),
    ],
)
def test_a_valid_api_origin_is_normalised(given: str, expected: str) -> None:
    import importlib.util

    spec = importlib.util.spec_from_file_location("modelforge_release_build", RELEASE_BUILD)
    assert spec and spec.loader
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    assert module.normalise_public_api_origin(given) == expected


def test_the_api_origin_reaches_the_console_image_build() -> None:
    """The validated origin must actually be passed to the build that inlines it."""

    source = _release_build_source()
    assert "VITE_API_BASE_URL={public_api_origin}" in source
    assert "ORIGIN_DEPENDENT_IMAGES" in source
    assert "modelforge-web" in source


def test_the_release_manifest_records_the_console_api_origin() -> None:
    """An operator must be able to see the compiled-in origin without unpacking the image."""

    assert '"public_api_origin"' in _release_build_source()


def test_the_console_csp_is_derived_from_the_same_origin_argument() -> None:
    """The bundle and the policy that protects it cannot be allowed to disagree."""

    dockerfile = FRONTEND_DOCKERFILE.read_text(encoding="utf-8")
    assert 'API_ORIGIN=$(printf \'%s\' "${VITE_API_BASE_URL}" | cut -d/ -f1-3)' in dockerfile
    # The build fails rather than shipping a policy with an unsubstituted placeholder.
    assert 'grep -q "connect-src \'self\' ${API_ORIGIN};"' in dockerfile


def test_the_console_csp_is_never_widened_to_a_wildcard() -> None:
    template = (ROOT / "frontend" / "security-headers.inc.template").read_text(encoding="utf-8")
    connect = [line for line in template.splitlines() if "connect-src" in line]
    assert connect, "the template must define connect-src"
    for line in connect:
        assert "connect-src 'self' __API_ORIGIN__" in line
        assert "*" not in line.split("connect-src", 1)[1].split(";")[0]


def test_local_development_keeps_its_convenient_default() -> None:
    """Fail-closed is a property of the release path, not of `docker compose up` on a laptop."""

    dockerfile = FRONTEND_DOCKERFILE.read_text(encoding="utf-8")
    assert "ARG VITE_API_BASE_URL=http://localhost:8000" in dockerfile
    development = _compose("docker-compose.yml")["services"]["web"]["build"]["args"]
    assert development["VITE_API_BASE_URL"] == "${VITE_API_BASE_URL:-http://localhost:8000}"


def test_the_production_overlay_still_demands_an_api_base_url() -> None:
    production = _compose("docker-compose.production.yml")["services"]["web"]["build"]["args"]
    assert production["VITE_API_BASE_URL"].startswith("${VITE_API_BASE_URL:?")


# ------------------------------------------------------------- image provenance (defect B)


def test_every_release_dockerfile_declares_the_release_identity_arguments() -> None:
    for relative in (
        "backend/Dockerfile",
        "frontend/Dockerfile",
        "node-agent/Dockerfile",
        "runtime-worker/Dockerfile",
    ):
        text = (ROOT / relative).read_text(encoding="utf-8")
        for argument in ("MODELFORGE_VERSION", "MODELFORGE_COMMIT", "MODELFORGE_BUILT_AT"):
            assert f"ARG {argument}" in text, f"{relative} does not accept {argument}"


def test_every_release_dockerfile_emits_the_required_oci_labels() -> None:
    for relative in (
        "backend/Dockerfile",
        "frontend/Dockerfile",
        "node-agent/Dockerfile",
        "runtime-worker/Dockerfile",
    ):
        text = (ROOT / relative).read_text(encoding="utf-8")
        for label in REQUIRED_OCI_LABELS:
            assert f'LABEL {label}=' in text, f"{relative} does not set {label}"


def test_the_oci_version_and_revision_come_from_the_release_arguments() -> None:
    """A label typed in by hand is a label that drifts."""

    for relative in (
        "backend/Dockerfile",
        "frontend/Dockerfile",
        "node-agent/Dockerfile",
        "runtime-worker/Dockerfile",
    ):
        text = (ROOT / relative).read_text(encoding="utf-8")
        assert 'org.opencontainers.image.version="${MODELFORGE_VERSION}"' in text
        assert 'org.opencontainers.image.revision="${MODELFORGE_COMMIT}"' in text
        assert 'org.opencontainers.image.created="${MODELFORGE_BUILT_AT}"' in text


def test_the_node_agent_compose_build_passes_the_release_identity() -> None:
    """The exact gap that let production run a 1.1.1 tag containing 1.2.0."""

    build = _compose("docker-compose.node-agent.yml")["services"]["node-agent"]["build"]
    args = build.get("args")
    assert args, "the node-agent build must pass release identity arguments"
    assert args["MODELFORGE_VERSION"] == "${MODELFORGE_VERSION:-0.0.0}"
    assert args["MODELFORGE_COMMIT"] == "${MODELFORGE_COMMIT:-}"
    assert args["MODELFORGE_BUILT_AT"] == "${MODELFORGE_BUILT_AT:-}"


def test_every_composed_release_image_passes_the_release_identity() -> None:
    """Whatever builds a published image must stamp it; otherwise the tag is the only identity."""

    for compose_file, service in (
        ("docker-compose.yml", "api"),
        ("docker-compose.yml", "web"),
        ("docker-compose.node-agent.yml", "node-agent"),
        ("docker-compose.runtime-worker.yml", "runtime-worker"),
    ):
        build = _compose(compose_file)["services"][service].get("build")
        assert build, f"{compose_file}:{service} has no build section"
        args = build.get("args") or {}
        assert "MODELFORGE_VERSION" in args, f"{compose_file}:{service} omits MODELFORGE_VERSION"
        assert "MODELFORGE_COMMIT" in args, f"{compose_file}:{service} omits MODELFORGE_COMMIT"


def test_the_node_agent_image_reference_is_versioned_and_never_floating() -> None:
    service = _compose("docker-compose.node-agent.yml")["services"]["node-agent"]
    reference = service["image"]
    assert "${MODELFORGE_NODE_AGENT_IMAGE:-" in reference
    assert "${MODELFORGE_VERSION:-local}" in reference
    assert ":latest" not in reference


def test_the_runtime_worker_image_reference_is_versioned_and_never_floating() -> None:
    service = _compose("docker-compose.runtime-worker.yml")["services"]["runtime-worker"]
    reference = service["image"]
    assert "${MODELFORGE_RUNTIME_WORKER_IMAGE:-" in reference
    assert "${MODELFORGE_VERSION:-local}" in reference
    assert ":latest" not in reference


def test_the_agent_version_derives_from_the_repository_version_file() -> None:
    """Single-source versioning: VERSION drives every packaged manifest.

    Read from the file rather than imported: the Node Agent is a separate distribution and is not
    installed into the backend's environment, and a version test that silently skips when the
    import fails would be worthless.
    """

    text = (ROOT / "node-agent" / "src" / "modelforge_node_agent" / "__init__.py").read_text(
        encoding="utf-8"
    )
    match = re.search(r'__version__\s*=\s*"([^"]+)"', text)
    assert match, "the Node Agent must declare __version__"
    assert match.group(1) == PRODUCT_VERSION
    assert (ROOT / "VERSION").read_text(encoding="utf-8").strip() == PRODUCT_VERSION


def test_the_runtime_worker_version_matches_the_release() -> None:
    text = (ROOT / "runtime-worker" / "src" / "modelforge_runtime_worker" / "__init__.py").read_text(
        encoding="utf-8"
    )
    match = re.search(r'__version__\s*=\s*"([^"]+)"', text)
    assert match and match.group(1) == PRODUCT_VERSION


def test_the_release_builder_publishes_exactly_the_expected_images() -> None:
    source = _release_build_source()
    for image in RELEASE_IMAGES:
        assert f'"{image}"' in source


# ---------------------------------------------------------------- artifact reproducibility


def test_release_artifacts_are_written_with_unix_line_endings() -> None:
    """`sha256sum -c` treats a trailing CR as part of the filename and fails on every entry.

    Found while verifying v1.2.0 on Windows: all four digests were correct and not one filename
    could be read.
    """

    source = _release_build_source()
    assert source.count('newline="\\n"') >= 2
    assert 'checksums.write_text("\\n".join(lines) + "\\n", encoding="utf-8", newline="\\n")' in (
        source
    )


def test_the_build_timestamp_feeds_the_reproducible_build_contract() -> None:
    source = _release_build_source()
    assert "SOURCE_DATE_EPOCH" in source
    assert "def source_date_epoch" in source


def test_the_release_build_refuses_a_dirty_tree_by_default() -> None:
    source = _release_build_source()
    assert "refusing to build a release from a dirty working tree" in source


def test_the_release_build_records_no_host_specific_paths() -> None:
    """A manifest that names the machine that built it is not a portable release record."""

    source = _release_build_source()
    for accidental in ("C:\\\\", "/home/", "/Users/", "os.getcwd()"):
        assert accidental not in source, f"release build references {accidental!r}"