"""Tests for SlicerApiService."""

from __future__ import annotations

import asyncio

import httpx
import pytest

from backend.app.services.slicer_api import (
    BundleNotFoundError,
    BundleSummary,
    SlicerApiServerError,
    SlicerApiService,
    SlicerApiUnavailableError,
    SliceResult,
    SlicerInputError,
    _guess_model_content_type,
)


def _mock_client(handler) -> httpx.AsyncClient:
    """Build an httpx.AsyncClient that routes every request through `handler`.
    handler signature: (httpx.Request) -> httpx.Response.
    """
    transport = httpx.MockTransport(handler)
    return httpx.AsyncClient(transport=transport, timeout=10.0)


class TestGuessModelContentType:
    """The sidecar's multer middleware rejects octet-stream for STL uploads,
    so we guess by extension."""

    def test_stl(self):
        assert _guess_model_content_type("Cube.stl") == "model/stl"

    def test_3mf(self):
        assert _guess_model_content_type("Bank.3mf") == "model/3mf"

    def test_3mf_uppercase(self):
        assert _guess_model_content_type("Bank.3MF") == "model/3mf"

    def test_step(self):
        assert _guess_model_content_type("Cube.step") == "model/step"

    def test_stp(self):
        assert _guess_model_content_type("Cube.stp") == "model/step"

    def test_unknown(self):
        assert _guess_model_content_type("foo.bar") == "application/octet-stream"


class TestSliceWithProfiles:
    @pytest.mark.asyncio
    async def test_happy_path_returns_gcode_and_metadata(self):
        captured: dict = {}

        def handler(request: httpx.Request) -> httpx.Response:
            captured["url"] = str(request.url)
            captured["body_len"] = len(request.content)
            captured["content_type"] = request.headers.get("content-type", "")
            return httpx.Response(
                status_code=200,
                content=b"; G-CODE START\nG28\n",
                headers={
                    "content-type": "application/octet-stream",
                    "x-print-time-seconds": "656",
                    "x-filament-used-g": "0.94",
                    "x-filament-used-mm": "302.5",
                },
            )

        client = _mock_client(handler)
        service = SlicerApiService("http://sidecar:3000", client=client)

        result = await service.slice_with_profiles(
            model_bytes=b"solid Cube\n",
            model_filename="Cube.stl",
            printer_profile_json='{"name": "p"}',
            process_profile_json='{"name": "pr"}',
            filament_profile_jsons=['{"name": "f"}'],
        )

        assert isinstance(result, SliceResult)
        assert result.content == b"; G-CODE START\nG28\n"
        assert result.print_time_seconds == 656
        assert result.filament_used_g == 0.94
        assert result.filament_used_mm == 302.5
        assert captured["url"].endswith("/slice")
        assert captured["content_type"].startswith("multipart/form-data")
        # Roughly: model bytes (>0) + 3 profile JSONs (>0). Sanity check that
        # all four parts hit the wire.
        assert captured["body_len"] > 0

    @pytest.mark.asyncio
    async def test_4xx_raises_slicer_input_error(self):
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=400,
                json={"message": "Invalid file type for printerProfile."},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerInputError) as exc_info:
            await service.slice_with_profiles(
                model_bytes=b"x",
                model_filename="Cube.stl",
                printer_profile_json="{}",
                process_profile_json="{}",
                filament_profile_jsons=["{}"],
            )
        assert "Invalid file type" in str(exc_info.value)

    @pytest.mark.asyncio
    async def test_5xx_raises_server_error(self):
        # 5xx from the sidecar = wrapped CLI failed (segfault, range-check
        # reject, etc). Distinguished from connection failures so callers
        # can retry with a different request shape.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=500,
                json={"message": "Failed to slice the model"},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiServerError) as exc_info:
            await service.slice_with_profiles(
                model_bytes=b"x",
                model_filename="Cube.stl",
                printer_profile_json="{}",
                process_profile_json="{}",
                filament_profile_jsons=["{}"],
            )
        assert "Failed to slice the model" in str(exc_info.value)

    @pytest.mark.asyncio
    async def test_5xx_includes_sidecar_details_field(self):
        """Sidecar's AppError emits ``{message, details}`` — both must end up
        in the raised error so ``bambuddy.log`` carries the actual CLI
        rejection reason instead of just the generic outer message.
        Pinned to fix the regression where every 3MF slice surfaced as
        the unhelpful ``Failed to slice the model`` line in production."""

        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=500,
                json={
                    "message": "Failed to slice the model",
                    "details": "prime_tower_brim_width: -1 not in range [0, 100]",
                },
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiServerError) as exc_info:
            await service.slice_with_profiles(
                model_bytes=b"x",
                model_filename="Cube.stl",
                printer_profile_json="{}",
                process_profile_json="{}",
                filament_profile_jsons=["{}"],
            )
        msg = str(exc_info.value)
        assert "Failed to slice the model" in msg
        assert "prime_tower_brim_width: -1" in msg

    @pytest.mark.asyncio
    async def test_5xx_with_only_details_still_surfaces(self):
        """If a future sidecar version emits ``details`` without
        ``message``, fall back to the details string so we don't end up
        with an empty error."""

        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=500,
                json={"details": "Slicer killed by SIGSEGV"},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiServerError) as exc_info:
            await service.slice_with_profiles(
                model_bytes=b"x",
                model_filename="Cube.stl",
                printer_profile_json="{}",
                process_profile_json="{}",
                filament_profile_jsons=["{}"],
            )
        assert "SIGSEGV" in str(exc_info.value)

    @pytest.mark.asyncio
    async def test_5xx_with_non_json_body_falls_back_to_text(self):
        """Some failure paths (gateway timeouts, bare nginx 502s) return
        plain text rather than the JSON envelope. Don't crash trying to
        decode it — fall back to the text body."""

        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(status_code=502, content=b"Bad Gateway")

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiServerError) as exc_info:
            await service.slice_with_profiles(
                model_bytes=b"x",
                model_filename="Cube.stl",
                printer_profile_json="{}",
                process_profile_json="{}",
                filament_profile_jsons=["{}"],
            )
        assert "Bad Gateway" in str(exc_info.value)

    @pytest.mark.asyncio
    async def test_connection_error_raises_unavailable(self):
        def handler(request: httpx.Request) -> httpx.Response:
            raise httpx.ConnectError("Connection refused")

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiUnavailableError) as exc_info:
            await service.slice_with_profiles(
                model_bytes=b"x",
                model_filename="Cube.stl",
                printer_profile_json="{}",
                process_profile_json="{}",
                filament_profile_jsons=["{}"],
            )
        assert "unreachable" in str(exc_info.value).lower()

    @pytest.mark.asyncio
    async def test_passes_plate_and_export_3mf_options(self):
        captured: dict = {}

        def handler(request: httpx.Request) -> httpx.Response:
            captured["body"] = request.content
            return httpx.Response(
                status_code=200,
                content=b"3MF-BYTES",
                headers={"x-print-time-seconds": "0", "x-filament-used-g": "0", "x-filament-used-mm": "0"},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        await service.slice_with_profiles(
            model_bytes=b"x",
            model_filename="Cube.stl",
            printer_profile_json="{}",
            process_profile_json="{}",
            filament_profile_jsons=["{}"],
            plate=2,
            export_3mf=True,
        )

        body = captured["body"]
        # Multipart body should contain the form fields. Quick membership
        # check beats parsing the multipart envelope.
        assert b'name="plate"' in body
        assert b"\r\n2\r\n" in body or b'name="plate"\r\n\r\n2' in body
        assert b'name="exportType"' in body
        assert b"3mf" in body

    @pytest.mark.asyncio
    async def test_multi_filament_sends_one_part_per_profile(self):
        # Multi-color slicing requires N filament profiles, in plate-slot
        # order, sent as N repeated multipart `filamentProfile` parts (NOT a
        # single concatenated value). The CLI joins their resulting paths
        # with `;` for --load-filaments. A future regression to a dict-shaped
        # `files=` would silently keep prior tests green but ship only the
        # last filament — pin the wire shape.
        captured: dict = {}

        def handler(request: httpx.Request) -> httpx.Response:
            captured["body"] = request.content
            return httpx.Response(
                status_code=200,
                content=b"3MF-BYTES",
                headers={"x-print-time-seconds": "0", "x-filament-used-g": "0", "x-filament-used-mm": "0"},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        await service.slice_with_profiles(
            model_bytes=b"x",
            model_filename="Cube.3mf",
            printer_profile_json="{}",
            process_profile_json="{}",
            filament_profile_jsons=['{"a":1}', '{"b":2}', '{"c":3}'],
        )

        body = captured["body"]
        # Three repeated `filamentProfile` parts, in submission order.
        assert body.count(b'name="filamentProfile"') == 3
        assert b'{"a":1}' in body and b'{"b":2}' in body and b'{"c":3}' in body
        # Parts present in plate order — the 'a' bytes appear before 'b'
        # which appear before 'c'. (httpx preserves the list order.)
        assert body.index(b'{"a":1}') < body.index(b'{"b":2}') < body.index(b'{"c":3}')

    @pytest.mark.asyncio
    async def test_missing_metadata_headers_default_to_zero(self):
        # The /slice endpoint always sets these on success, but be defensive
        # so a stripped reverse-proxy or older sidecar doesn't crash callers.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(status_code=200, content=b"; gcode")

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        result = await service.slice_with_profiles(
            model_bytes=b"x",
            model_filename="Cube.stl",
            printer_profile_json="{}",
            process_profile_json="{}",
            filament_profile_jsons=["{}"],
        )
        assert result.print_time_seconds == 0
        assert result.filament_used_g == 0.0
        assert result.filament_used_mm == 0.0


class TestHealth:
    @pytest.mark.asyncio
    async def test_health_returns_body(self):
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=200,
                json={"status": "healthy", "checks": {"orcaslicer": {"available": True}}},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        body = await service.health()
        assert body["status"] == "healthy"

    @pytest.mark.asyncio
    async def test_health_unreachable_raises(self):
        def handler(request: httpx.Request) -> httpx.Response:
            raise httpx.ConnectError("no route")

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiUnavailableError):
            await service.health()


class TestSliceWithProfilesProgress:
    """Live-progress wiring for slice_with_profiles.

    When the caller supplies a ``request_id`` and an ``on_progress``
    callback, the service forwards the id as a ``requestId`` form field
    (the sidecar uses it to wire up `--pipe` per request) and spawns a
    background poller that calls back into ``on_progress`` for each
    snapshot the sidecar publishes. The poller is cancelled the moment
    the slice POST returns.
    """

    @pytest.mark.asyncio
    async def test_request_id_forwarded_as_form_field(self):
        captured: dict = {}

        def handler(request: httpx.Request) -> httpx.Response:
            if request.url.path == "/slice":
                captured["body"] = request.content
                return httpx.Response(
                    status_code=200,
                    content=b"PK\x03\x04 fake",
                    headers={"x-print-time-seconds": "1", "x-filament-used-g": "0", "x-filament-used-mm": "0"},
                )
            # /slice/progress/<id> — return 404 so the poller exits cleanly.
            return httpx.Response(status_code=404, json={"error": "not_found"})

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        await service.slice_with_profiles(
            model_bytes=b"x",
            model_filename="Cube.stl",
            printer_profile_json="{}",
            process_profile_json="{}",
            filament_profile_jsons=["{}"],
            request_id="abc-123",
            on_progress=lambda _snap: None,
        )
        # The form field name on the wire is `requestId` (camelCase) to
        # match the sidecar's SlicingSettings shape.
        body = captured["body"].decode("utf-8", errors="ignore")
        assert "requestId" in body
        assert "abc-123" in body

    @pytest.mark.asyncio
    async def test_on_progress_called_with_snapshots(self):
        # Drive enough poller ticks for at least one progress 200 to land
        # before the slice response unblocks the caller.
        slice_release = asyncio.Event()
        snapshots: list[dict] = []

        async def slice_handler() -> httpx.Response:
            # Hold the slice POST until the test signals release, mimicking
            # a real long-running slice.
            await slice_release.wait()
            return httpx.Response(
                status_code=200,
                content=b"PK\x03\x04",
                headers={"x-print-time-seconds": "1", "x-filament-used-g": "0", "x-filament-used-mm": "0"},
            )

        def handler(request: httpx.Request) -> httpx.Response:
            if request.url.path == "/slice":
                # MockTransport supports async handlers if we return a
                # coroutine — but the simpler path is to drive completion
                # via the captured event below.
                pass
            if request.url.path == "/slice/progress/req-1":
                return httpx.Response(
                    status_code=200,
                    json={
                        "stage": "Generating G-code",
                        "total_percent": 75,
                        "plate_percent": 80,
                        "plate_index": 1,
                        "plate_count": 1,
                        "updated_at": 0,
                    },
                )
            return httpx.Response(404)

        # Use an async handler so the slice POST blocks until released.
        async def async_handler(request: httpx.Request) -> httpx.Response:
            if request.url.path == "/slice":
                return await slice_handler()
            return handler(request)

        client = httpx.AsyncClient(transport=httpx.MockTransport(async_handler))
        service = SlicerApiService("http://sidecar:3000", client=client)

        # Run the slice with progress callback, releasing it after a beat.
        async def release_after_first_snapshot():
            # Wait until the poller has published at least one snapshot
            # via the on_progress callback, then unblock the slice POST.
            for _ in range(60):
                if snapshots:
                    break
                await asyncio.sleep(0.05)
            slice_release.set()

        release_task = asyncio.create_task(release_after_first_snapshot())
        try:
            await service.slice_with_profiles(
                model_bytes=b"x",
                model_filename="Cube.stl",
                printer_profile_json="{}",
                process_profile_json="{}",
                filament_profile_jsons=["{}"],
                request_id="req-1",
                on_progress=lambda snap: snapshots.append(snap),
            )
        finally:
            release_task.cancel()
            await asyncio.gather(release_task, return_exceptions=True)
            await client.aclose()

        assert snapshots, "on_progress was never called"
        first = snapshots[0]
        assert first["stage"] == "Generating G-code"
        assert first["total_percent"] == 75

    @pytest.mark.asyncio
    async def test_progress_404_does_not_crash_or_stop_polling(self):
        """A 404 from /slice/progress/:id is expected during the early
        race window (POST fired before sidecar's progressStore.start()
        ran) and from older sidecars without progress support. Neither
        should crash the slice or block the response — the poller just
        keeps trying until the outer cancel fires."""

        def handler(request: httpx.Request) -> httpx.Response:
            if request.url.path == "/slice":
                return httpx.Response(
                    status_code=200,
                    content=b"PK\x03\x04",
                    headers={"x-print-time-seconds": "1", "x-filament-used-g": "0", "x-filament-used-mm": "0"},
                )
            return httpx.Response(status_code=404, json={"error": "not_found"})

        snapshots: list[dict] = []
        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        result = await service.slice_with_profiles(
            model_bytes=b"x",
            model_filename="Cube.stl",
            printer_profile_json="{}",
            process_profile_json="{}",
            filament_profile_jsons=["{}"],
            request_id="legacy-sidecar",
            on_progress=lambda snap: snapshots.append(snap),
        )
        assert result is not None
        # Sustained 404 → no snapshots ever forwarded.
        assert snapshots == []


# ── BundleSummary parsing + bundle CRUD client methods ─────────────────────


class TestBundleClientMethods:
    """Coverage for import_bundle / list_bundles / get_bundle / delete_bundle.

    Mirrors the existing SlicerApiService tests' mock-transport pattern. The
    bundle endpoints are simple JSON CRUD on the sidecar, but the response
    parsing has to remain forgiving (newer sidecars may add fields, older
    ones may omit some) and the failure modes have to map cleanly to our
    typed exceptions so route handlers can pick the right HTTP status.
    """

    SAMPLE_SUMMARY = {
        "id": "2bd8722dd20a837e",
        "printer_preset_name": "# Bambu Lab H2D 0.4 nozzle",
        "printer": ["# Bambu Lab H2D 0.4 nozzle"],
        "process": ["# 0.20mm Standard @BBL H2D"],
        "filament": ["# Bambu PLA Basic @BBL H2D"],
        "version": "02.06.00.50",
    }

    @pytest.mark.asyncio
    async def test_import_bundle_happy_path(self):
        captured: dict = {}

        def handler(request: httpx.Request) -> httpx.Response:
            captured["url"] = str(request.url)
            captured["method"] = request.method
            captured["content_type"] = request.headers.get("content-type", "")
            return httpx.Response(status_code=201, json=self.SAMPLE_SUMMARY)

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        summary = await service.import_bundle(b"PK\x03\x04zip-bytes", filename="H2D.bbscfg")

        assert isinstance(summary, BundleSummary)
        assert summary.id == "2bd8722dd20a837e"
        assert summary.printer == ["# Bambu Lab H2D 0.4 nozzle"]
        assert summary.process == ["# 0.20mm Standard @BBL H2D"]
        assert summary.filament == ["# Bambu PLA Basic @BBL H2D"]
        assert captured["method"] == "POST"
        assert captured["url"].endswith("/profiles/bundle")
        assert captured["content_type"].startswith("multipart/form-data")

    @pytest.mark.asyncio
    async def test_import_bundle_400_raises_input_error(self):
        # Non-.bbscfg uploads, corrupt zips, malicious entry names — all
        # rejected by the sidecar with 4xx so the user can fix and retry.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=400,
                json={"message": "Bundle is missing bundle_structure.json"},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerInputError) as exc_info:
            await service.import_bundle(b"not a zip")
        assert "missing bundle_structure" in str(exc_info.value)

    @pytest.mark.asyncio
    async def test_import_bundle_5xx_raises_server_error(self):
        # Disk-write failure on DATA_PATH — rare but observable when /data
        # is a tmpfs that filled up.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(status_code=500, json={"message": "ENOSPC"})

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiServerError):
            await service.import_bundle(b"x")

    @pytest.mark.asyncio
    async def test_import_bundle_connection_error(self):
        def handler(request: httpx.Request) -> httpx.Response:
            raise httpx.ConnectError("connection refused")

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiUnavailableError):
            await service.import_bundle(b"x")

    @pytest.mark.asyncio
    async def test_list_bundles_returns_summaries(self):
        def handler(request: httpx.Request) -> httpx.Response:
            assert request.url.path == "/profiles/bundles"
            return httpx.Response(status_code=200, json=[self.SAMPLE_SUMMARY])

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        bundles = await service.list_bundles()
        assert len(bundles) == 1
        assert bundles[0].id == self.SAMPLE_SUMMARY["id"]

    @pytest.mark.asyncio
    async def test_list_bundles_empty_array(self):
        # Sidecar returns [] when no bundles imported yet — must not raise.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(status_code=200, json=[])

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        assert await service.list_bundles() == []

    @pytest.mark.asyncio
    async def test_list_bundles_non_array_raises(self):
        # Older / mis-configured sidecar returning {} instead of []. Surface
        # the bug with a clear server error rather than silently treating
        # malformed payload as empty.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(status_code=200, json={"unexpected": "shape"})

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiServerError):
            await service.list_bundles()

    @pytest.mark.asyncio
    async def test_get_bundle_404_raises_not_found(self):
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(status_code=404, json={"message": "not found"})

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(BundleNotFoundError):
            await service.get_bundle("deadbeef00000000")

    @pytest.mark.asyncio
    async def test_get_bundle_happy_path(self):
        def handler(request: httpx.Request) -> httpx.Response:
            assert request.url.path == "/profiles/bundles/2bd8722dd20a837e"
            return httpx.Response(status_code=200, json=self.SAMPLE_SUMMARY)

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        summary = await service.get_bundle("2bd8722dd20a837e")
        assert summary.id == "2bd8722dd20a837e"

    @pytest.mark.asyncio
    async def test_delete_bundle_204_succeeds_silently(self):
        def handler(request: httpx.Request) -> httpx.Response:
            assert request.method == "DELETE"
            return httpx.Response(status_code=204)

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        # Should not raise.
        await service.delete_bundle("2bd8722dd20a837e")

    @pytest.mark.asyncio
    async def test_delete_bundle_404_raises_not_found(self):
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(status_code=404, json={"message": "not found"})

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(BundleNotFoundError):
            await service.delete_bundle("missing")


class TestSliceWithBundle:
    """The bundle slice path takes the same model upload but replaces the
    profile-attachment fields with bundle-id + preset-name form fields.
    Coverage for the form shape, the multi-filament join, and the same
    4xx/5xx mapping as slice_with_profiles."""

    @pytest.mark.asyncio
    async def test_form_fields_and_filament_join(self):
        captured: dict = {}

        def handler(request: httpx.Request) -> httpx.Response:
            captured["url"] = str(request.url)
            captured["body"] = request.content
            captured["content_type"] = request.headers.get("content-type", "")
            return httpx.Response(
                status_code=200,
                content=b"; G-CODE",
                headers={
                    "x-print-time-seconds": "60",
                    "x-filament-used-g": "1.0",
                    "x-filament-used-mm": "100.0",
                },
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        result = await service.slice_with_bundle(
            model_bytes=b"solid Cube\n",
            model_filename="Cube.stl",
            bundle_id="2bd8722dd20a837e",
            printer_name="# Bambu Lab H2D 0.4 nozzle",
            process_name="# 0.20mm Standard @BBL H2D",
            filament_names=["# Bambu PLA Basic @BBL H2D", "# Bambu PETG HF @BBL H2D"],
        )

        assert isinstance(result, SliceResult)
        assert result.print_time_seconds == 60
        assert captured["url"].endswith("/slice")
        assert captured["content_type"].startswith("multipart/form-data")
        # Multi-filament joined with ';' — the sidecar's parser splits on
        # both ';' and ',' so the wire format is the more-explicit ';'.
        body = captured["body"]
        assert b"# Bambu PLA Basic @BBL H2D;# Bambu PETG HF @BBL H2D" in body
        # Each form field appears in the multipart body.
        assert b'name="bundle"' in body
        assert b'name="printerName"' in body
        assert b'name="processName"' in body
        assert b'name="filamentNames"' in body
        # Bundle id round-trips on the wire.
        assert b"2bd8722dd20a837e" in body

    @pytest.mark.asyncio
    async def test_404_unknown_preset_maps_to_input_error(self):
        # Sidecar returns 404 when bundle exists but preset name doesn't.
        # The slice route classifies this as user-correctable input error,
        # not server failure.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=404,
                json={"message": 'process preset "Imaginary" not found in bundle "abc"'},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerInputError):
            await service.slice_with_bundle(
                model_bytes=b"x",
                model_filename="Cube.stl",
                bundle_id="abc",
                printer_name="p",
                process_name="Imaginary",
                filament_names=["f"],
            )

    @pytest.mark.asyncio
    async def test_5xx_maps_to_server_error(self):
        # CLI segfault on the resolved triplet — same handling as slice_with_profiles.
        def handler(request: httpx.Request) -> httpx.Response:
            return httpx.Response(
                status_code=500,
                json={"message": "Slicer process failed (signal SIGSEGV)"},
            )

        service = SlicerApiService("http://sidecar:3000", client=_mock_client(handler))
        with pytest.raises(SlicerApiServerError):
            await service.slice_with_bundle(
                model_bytes=b"x",
                model_filename="Cube.3mf",
                bundle_id="abc",
                printer_name="p",
                process_name="pr",
                filament_names=["f"],
            )