"""Unit tests for printer model utilities."""

import pytest

from backend.app.services.camera import get_camera_port, supports_rtsp
from backend.app.utils.printer_models import (
    CARBON_ROD_MODELS,
    LINEAR_RAIL_MODELS,
    STEEL_ROD_MODELS,
    get_rod_type,
    has_ethernet,
    has_external_storage,
    has_remote_storage_toggle,
    is_dual_nozzle_model,
    normalize_printer_model,
    normalize_printer_model_id,
    supports_nozzle_flow_type,
)


class TestGetRodType:
    """Tests for get_rod_type() rod/rail classification."""

    @pytest.mark.parametrize("model", ["X1C", "X1", "X1E", "P1P", "P1S"])
    def test_carbon_rod_models(self, model: str):
        assert get_rod_type(model) == "carbon"

    @pytest.mark.parametrize("model", ["C11", "C12", "C13"])
    def test_carbon_rod_internal_codes(self, model: str):
        assert get_rod_type(model) == "carbon"

    def test_p2s_is_steel_rod(self):
        """P2S uses hardened steel rods, not carbon rods (#640)."""
        assert get_rod_type("P2S") == "steel_rod"

    def test_p2s_internal_code_is_steel_rod(self):
        """N7 (P2S internal code) uses steel rods."""
        assert get_rod_type("N7") == "steel_rod"

    @pytest.mark.parametrize("model", ["A1", "A1 Mini", "H2D", "H2D Pro", "H2C", "H2S"])
    def test_linear_rail_models(self, model: str):
        assert get_rod_type(model) == "linear_rail"

    @pytest.mark.parametrize("model", ["N1", "N2S", "A11", "A12", "O1D", "O1E", "O2D", "O1C", "O1C2", "O1S"])
    def test_linear_rail_internal_codes(self, model: str):
        assert get_rod_type(model) == "linear_rail"

    def test_unknown_model_returns_none(self):
        assert get_rod_type("UNKNOWN") is None

    def test_none_returns_none(self):
        assert get_rod_type(None) is None

    def test_case_insensitive(self):
        assert get_rod_type("p2s") == "steel_rod"
        assert get_rod_type("x1c") == "carbon"
        assert get_rod_type("a1") == "linear_rail"

    def test_strips_whitespace_and_dashes(self):
        assert get_rod_type(" P2S ") == "steel_rod"
        assert get_rod_type("A1-Mini") == "linear_rail"


class TestX2DModel:
    """X2D printer support (issue #988).

    The X2D is a dual-nozzle enclosed printer launched April 2026. It shares
    the hardened steel rod hardware with P2S (NOT carbon rods) and uses
    RTSP on port 322 like other X/H series printers. Internal SSDP/MQTT
    model code is "N6"; serial numbers begin with "20P9".
    """

    def test_x2d_is_steel_rod_display_name(self):
        assert get_rod_type("X2D") == "steel_rod"

    def test_x2d_is_steel_rod_internal_code(self):
        assert get_rod_type("N6") == "steel_rod"

    def test_x2d_model_id_map(self):
        assert normalize_printer_model_id("N6") == "X2D"

    def test_x2d_model_map(self):
        assert normalize_printer_model("Bambu Lab X2D") == "X2D"

    def test_x2d_has_ethernet_display_name(self):
        assert has_ethernet("X2D") is True

    def test_x2d_has_ethernet_internal_code(self):
        assert has_ethernet("N6") is True

    def test_x2d_supports_rtsp_display_name(self):
        assert supports_rtsp("X2D") is True

    def test_x2d_supports_rtsp_internal_code(self):
        assert supports_rtsp("N6") is True

    def test_x2d_camera_port_is_rtsp(self):
        assert get_camera_port("N6") == 322
        assert get_camera_port("X2D") == 322

    def test_x2d_not_in_carbon_rod_set(self):
        """Regression guard: X2D has hardened steel rods, not carbon (#988).

        A prior PR classified X2D as carbon; the reporter confirmed it uses
        the same stainless steel rod gantry as P2S. This assertion pins the
        classification so a future change that reverts it will fail loudly.
        """
        assert "X2D" not in CARBON_ROD_MODELS
        assert "N6" not in CARBON_ROD_MODELS
        assert "X2D" in STEEL_ROD_MODELS
        assert "N6" in STEEL_ROD_MODELS


class TestA2LModel:
    """A2L printer support (#1684).

    The A2L is a hybrid 3D printer + cutter/plotter announced June 2026. It
    uses linear rails like the A1 family, has NO Ethernet (Wi-Fi 2.4 GHz only),
    a low-rate chamber-image camera on port 6000 (no RTSP), and a single FDM
    extruder (the second "tool head" in BambuStudio's profile is the cutter,
    not a second extruder — must NOT be classified as dual-nozzle). Internal
    SSDP/MQTT model code is "N9"; serial numbers begin with "26A19".
    """

    def test_a2l_is_linear_rail_display_name(self):
        assert get_rod_type("A2L") == "linear_rail"

    def test_a2l_is_linear_rail_internal_code(self):
        assert get_rod_type("N9") == "linear_rail"

    def test_a2l_model_id_map(self):
        assert normalize_printer_model_id("N9") == "A2L"

    def test_a2l_model_map(self):
        assert normalize_printer_model("Bambu Lab A2L") == "A2L"

    def test_a2l_has_no_ethernet_display_name(self):
        """A2L specs (bambulab.com/de-de/a2l/specs) list Ethernet 'Nicht verfügbar'."""
        assert has_ethernet("A2L") is False

    def test_a2l_has_no_ethernet_internal_code(self):
        assert has_ethernet("N9") is False

    def test_a2l_does_not_support_rtsp_display_name(self):
        """A2L uses the low-rate chamber-image protocol on port 6000, not RTSP."""
        assert supports_rtsp("A2L") is False

    def test_a2l_does_not_support_rtsp_internal_code(self):
        assert supports_rtsp("N9") is False

    def test_a2l_camera_port_is_chamber_image(self):
        assert get_camera_port("A2L") == 6000
        assert get_camera_port("N9") == 6000

    def test_a2l_is_not_dual_nozzle(self):
        """A2L has a single FDM extruder + a cutter/plotter head. The
        BambuStudio profile flag ``use_double_extruder_default_texture`` flags
        the dual TOOL HEADS, not dual filament extrusion — A2L must not land
        in the dual-nozzle group or AMS routing will target the deputy slot
        and the firmware will reject the print with 07FF_8012.
        """
        assert is_dual_nozzle_model("A2L") is False
        assert is_dual_nozzle_model("N9") is False

    def test_a2l_in_linear_rail_set(self):
        assert "A2L" in LINEAR_RAIL_MODELS
        assert "N9" in LINEAR_RAIL_MODELS

    def test_a2l_not_in_carbon_or_steel_rod_sets(self):
        assert "A2L" not in CARBON_ROD_MODELS
        assert "N9" not in CARBON_ROD_MODELS
        assert "A2L" not in STEEL_ROD_MODELS
        assert "N9" not in STEEL_ROD_MODELS


class TestA1SeriesModelIds:
    """Regression guard for the A1-family internal-code → display-name map.

    The serial-prefix and firmware-API key tables across the codebase agree
    that N2S is the A1 (serial prefix 039) and N1 is the A1 Mini (serial
    prefix 030). PRINTER_MODEL_ID_MAP had these swapped, which silently
    misclassified A1 as A1 Mini in any path that resolved by internal code.
    """

    def test_n2s_is_a1(self):
        assert normalize_printer_model_id("N2S") == "A1"

    def test_n1_is_a1_mini(self):
        assert normalize_printer_model_id("N1") == "A1 Mini"


class TestDualNozzleModel:
    """is_dual_nozzle_model — the single source of truth for nozzle class,
    consumed by start_print, the K-profile routes, and the re-slice guard."""

    def test_h2d_and_pro_are_dual(self):
        # Takes a normalized model code (like has_ethernet) — "H2D Pro" with a
        # space is accepted; full "Bambu Lab …" names are normalized by callers.
        assert is_dual_nozzle_model("H2D") is True
        assert is_dual_nozzle_model("H2D Pro") is True
        assert is_dual_nozzle_model("H2DPRO") is True

    def test_internal_codes_are_dual(self):
        assert is_dual_nozzle_model("O1D") is True  # H2D
        assert is_dual_nozzle_model("O1E") is True  # H2D Pro

    def test_single_nozzle_models_are_not_dual(self):
        # H2S is in the H2 family but single-nozzle (#1386) — must be False.
        for model in ("X1C", "X1E", "P1S", "P1P", "A1", "A1 Mini", "P2S", "H2S"):
            assert is_dual_nozzle_model(model) is False, model

    def test_none_and_empty_are_not_dual(self):
        assert is_dual_nozzle_model(None) is False
        assert is_dual_nozzle_model("") is False


class TestSupportsNozzleFlowType:
    """Which models offer a Standard / High Flow choice on a K-profile.

    Mirrors the slicer's own rule — BambuStudio/OrcaSlicer gate their
    Nozzle-Flow control on ``len(nozzle_volume) // len(nozzle_diameter) > 1``
    read from the machine preset. Evaluated over every bundled Bambu profile,
    only the A-series lands on one variant. Getting this wrong in the
    permissive direction shows a redundant dropdown; getting it wrong in the
    other direction makes half a printer's calibration table unreachable.
    """

    def test_a_series_has_one_flow_variant(self):
        for model in ("A1", "A1 Mini", "A1MINI", "A2L"):
            assert supports_nozzle_flow_type(model) is False, model

    def test_a_series_internal_codes(self):
        for code in ("N1", "N2S", "N9", "A04", "A11", "A12"):
            assert supports_nozzle_flow_type(code) is False, code

    def test_single_nozzle_models_still_offer_both_flows(self):
        # The split is NOT nozzle count: all of these are single-nozzle and
        # all carry two nozzle_volume variants in their machine preset.
        for model in ("X1", "X1C", "X1E", "P1P", "P1S", "P2S", "H2S"):
            assert supports_nozzle_flow_type(model) is True, model

    def test_dual_nozzle_models_offer_both_flows(self):
        for model in ("H2D", "H2D Pro", "H2C"):
            assert supports_nozzle_flow_type(model) is True, model

    def test_unknown_and_empty_default_to_supported(self):
        # Fail open: a redundant dropdown beats an unreachable half-table.
        assert supports_nozzle_flow_type(None) is True
        assert supports_nozzle_flow_type("") is True
        assert supports_nozzle_flow_type("SomeFuturePrinter") is True


class TestHasExternalStorage:
    """Pins which Bambu models have a MicroSD slot. The connection
    diagnostic flips its ``external_storage`` check from ``fail`` to
    ``skip`` based on this — a false add (X1C marked as no-storage) would
    silently disable a genuine fail signal for X1/P1/P2S/H2 users."""

    @pytest.mark.parametrize("model", ["A1", "A1 Mini", "A1MINI", "A1-Mini", "a1"])
    def test_a1_series_has_no_external_storage(self, model: str):
        assert has_external_storage(model) is False

    @pytest.mark.parametrize("model", ["N1", "N2S", "A04", "A11", "A12"])
    def test_a1_internal_codes_have_no_external_storage(self, model: str):
        assert has_external_storage(model) is False

    @pytest.mark.parametrize(
        "model",
        ["X1C", "X1E", "X1", "P1S", "P1P", "P2S", "H2D", "H2D Pro", "H2C", "H2S", "X2D"],
    )
    def test_other_models_have_external_storage(self, model: str):
        assert has_external_storage(model) is True

    def test_unknown_model_defaults_to_true(self):
        # Default-true keeps the diagnostic active for new Bambu models;
        # add them to NO_EXTERNAL_STORAGE_MODELS explicitly when they ship
        # without a slot.
        assert has_external_storage("BrandNewModel2027") is True

    def test_none_and_empty_default_to_true(self):
        assert has_external_storage(None) is True
        assert has_external_storage("") is True


class TestHasRemoteStorageToggle:
    """#2524: P1-series have a slot but no reachable control to enable the
    "Store sent files on external storage" option. The diagnostic uses this
    to skip (not fail) on those models. A false add here would silently
    disable the genuine fail signal for X1/P2S/H2 users."""

    @pytest.mark.parametrize("model", ["P1S", "P1P", "p1s", "P1-S", "P1 S"])
    def test_p1_series_has_no_reachable_toggle(self, model: str):
        assert has_remote_storage_toggle(model) is False

    @pytest.mark.parametrize(
        "model",
        ["X1C", "X1E", "X1", "P2S", "H2D", "H2D Pro", "H2C", "H2S", "X2D", "A1", "A1 Mini"],
    )
    def test_other_models_have_reachable_toggle(self, model: str):
        assert has_remote_storage_toggle(model) is True

    def test_unknown_and_empty_default_to_true(self):
        # Default-true keeps the fail signal active for models not explicitly
        # listed — the skip only applies to known no-toggle firmware.
        assert has_remote_storage_toggle("BrandNewModel2027") is True
        assert has_remote_storage_toggle(None) is True
        assert has_remote_storage_toggle("") is True
