"""t14: `nvidia_shield.adb_command` against a REAL Home Assistant install.

The user's report was that the Shield could not be SELECTED for the action, so he
ran his diagnostics through the deprecated ``androidtv`` integration. A stub suite
cannot settle that: the picker is whatever HA hands the browser, and "was the
command sent to the Shield I picked?" is decided by HA's own service registry,
schema validation and target merging.

What this file drives, on the installed HA (2026.10.1):

* the REAL ``hass.services`` registry — the registration our ``async_setup`` makes;
* the REAL websocket command the frontend calls (``get_services``), asserting the
  payload carries ``target: {entity: [{domain: media_player}]}`` — that payload IS
  the picker;
* the REAL ``hass.services.async_call`` with ``return_response=True`` — asserting
  the output comes back under ``adb_response`` (the key the user's captures use)
  and that a call without it behaves as before;
* the REAL entity registry, for the ``device_id`` shape an automation sends.

WHAT THIS FILE CANNOT PROVE: there is no browser here, so nothing about how the
picker LOOKS. It proves the wire contract — the registration, the metadata the UI
consumes, and the resolved call. Every test skips cleanly when homeassistant is not
installed (run it with ``--with 'homeassistant>=2026.10' --with adb-shell``).
"""

from __future__ import annotations

import importlib
import json
import sys
from pathlib import Path
from types import SimpleNamespace

import pytest
import pytest_asyncio

pytest.importorskip(
    "homeassistant",
    reason="the real service registry is the point of this file",
)

from homeassistant.components.websocket_api import commands as ws_commands  # noqa: E402
from homeassistant.config_entries import (  # noqa: E402
    SOURCE_USER,
    ConfigEntries,
    ConfigEntry,
)
from homeassistant.core import HomeAssistant  # noqa: E402
from homeassistant.exceptions import ServiceValidationError  # noqa: E402
from homeassistant.helpers import device_registry as device_registry  # noqa: E402
from homeassistant.helpers import entity_registry as er  # noqa: E402
from homeassistant.helpers.entity_registry import (  # noqa: E402
    EntityRegistryItems,
    EntityRegistrySettings,
)
from homeassistant.helpers.service import (  # noqa: E402
    async_get_all_descriptions,
)

_ROOT = Path(__file__).resolve().parent.parent
if str(_ROOT) not in sys.path:
    sys.path.insert(0, str(_ROOT))

DOMAIN = "nvidia_shield"
SERVICE = "adb_command"
ENTITY_ID = "media_player.shield"


class FakePoller:
    """The ADB surface the handler uses: one shell call, real values back."""

    def __init__(self, output="ok", error=None):
        self.output = output
        self.error = error
        self.calls: list[str] = []

    async def shell(self, command):
        self.calls.append(command)
        if self.error is not None:
            raise self.error
        return self.output


@pytest_asyncio.fixture(name="ha")
async def ha_fixture(tmp_path):
    """A real HomeAssistant with the real registries and the real service registry.

    No core bootstrap: the registries are filled directly with the two containers
    core's loader fills (same objects), exactly as the t56 flow probe does — so an
    EntitySelector / target expansion sees the entities the real one would.
    """
    hass = HomeAssistant(str(tmp_path))
    device_registry.async_setup(hass)
    await device_registry.async_load(hass)
    registry = er.async_get(hass)
    registry.entities = EntityRegistryItems(hass)
    registry.deleted_entities = {}
    registry.settings = EntityRegistrySettings()
    registry._entities_data = registry.entities.data
    hass.data[er.DATA_REGISTRY] = registry
    # the real entry manager: device_registry.async_get_or_create needs an entry it
    # can look up, exactly as a real device registration does
    hass.config_entries = ConfigEntries(hass, {})
    hass.config_entries.async_schedule_reload = lambda entry_id: None
    entry = ConfigEntry(
        version=1,
        minor_version=1,
        domain=DOMAIN,
        title="Shield",
        data={},
        options={},
        source=SOURCE_USER,
        unique_id=None,
        subentries_data=(),
        discovery_keys={},
    )
    object.__setattr__(entry, "_options", {})
    hass.config_entries._entries[entry.entry_id] = entry
    hass._shield_entry = entry
    return hass


@pytest.fixture(name="integration")
def integration_fixture():
    """The integration package, imported by path under its real name."""
    return importlib.import_module("custom_components.nvidia_shield")


@pytest.fixture(name="media_player_module")
def media_player_fixture():
    return importlib.import_module("custom_components.nvidia_shield.media_player")


@pytest_asyncio.fixture(name="shield")
async def shield_fixture(ha, integration, media_player_module):
    """Set the integration up, and register ONE Shield as an adb_command target.

    Yields the fake manager behind that entity, so a test can see exactly how many
    commands reached the device.
    """
    await integration.async_setup(ha, {})
    poller = FakePoller()
    manager = SimpleNamespace(adb_poller=poller, connected=True)
    media_player_module._ADB_COMMAND_TARGETS[ENTITY_ID] = manager
    try:
        yield poller
    finally:
        media_player_module._ADB_COMMAND_TARGETS.pop(ENTITY_ID, None)


def _service_payload(descriptions):
    return descriptions[DOMAIN][SERVICE]


class RecordingConnection:
    """The websocket connection shape ``handle_get_services`` needs."""

    def __init__(self):
        self.messages: list[dict] = []

    def send_message(self, message):
        self.messages.append(message)

    def send_result(self, msg_id, payload):
        self.messages.append({"id": msg_id, "type": "result", "result": payload})


async def test_the_registration_declares_a_response(ha, integration, shield):
    """t14: a service that answers must say so — and OPTIONAL keeps callers free."""
    from homeassistant.core import SupportsResponse

    service = ha.services.async_services()[DOMAIN][SERVICE]
    assert service.supports_response is SupportsResponse.OPTIONAL


async def test_the_frontend_payload_carries_the_target_picker(ha, integration, shield):
    """THE fix: what the browser receives for this action must offer the Shield.

    Driven through the real websocket command (``get_services``), because that is
    the payload the UI builds its action form and target picker from.
    """
    payload = await async_get_all_descriptions(ha)
    description = _service_payload(payload)

    # the entity target the picker is rendered from
    assert description["target"] == {"entity": [{"domain": ["media_player"]}]}
    # a response-bearing action: the UI can offer to return the output
    assert description["response"] == {"optional": True}
    # both fields survive the runtime description (the form would be empty without)
    assert set(description["fields"]) == {"command", "entity_id"}

    # ...and it serialises as JSON, which is what actually crosses the wire
    assert json.loads(json.dumps(payload))[DOMAIN][SERVICE]["target"] == {
        "entity": [{"domain": ["media_player"]}]
    }


async def test_the_websocket_command_serves_the_same_payload(ha, integration, shield):
    """The exact command the frontend calls, not just the accessor behind it."""
    connection = RecordingConnection()
    # the command is decorated: it schedules the handler as a background task and
    # returns None, which is exactly how the frontend's request is served
    ws_commands.handle_get_services(ha, connection, {"id": 7, "type": "get_services"})
    await ha.async_block_till_done()

    # HA serialises the response to JSON BYTES before it reaches the socket, so this
    # is the exact text the browser parses for the action form
    assert len(connection.messages) == 1
    message = json.loads(connection.messages[0])
    assert message["id"] == 7
    assert message["success"] is True
    served = message["result"][DOMAIN][SERVICE]
    assert served["target"] == {"entity": [{"domain": ["media_player"]}]}
    assert served["response"] == {"optional": True}
    assert set(served["fields"]) == {"command", "entity_id"}


async def test_a_call_returns_the_command_output(ha, integration, shield):
    """The response the user's captures read: ``adb_response``, the old key."""
    response = await ha.services.async_call(
        DOMAIN,
        SERVICE,
        {"command": "echo hi", "entity_id": ENTITY_ID},
        blocking=True,
        return_response=True,
    )

    assert response == {"adb_response": "ok"}
    assert shield.calls == ["echo hi"]


async def test_a_call_from_the_ui_target_shape_returns_the_output(ha, integration, shield):
    """HA merges a picked target into the call as a LIST — accept it."""
    response = await ha.services.async_call(
        DOMAIN,
        SERVICE,
        {"command": "echo list", "entity_id": [ENTITY_ID]},
        blocking=True,
        return_response=True,
    )

    assert response == {"adb_response": "ok"}
    assert shield.calls == ["echo list"]


async def test_a_call_without_the_response_still_works(ha, integration, shield):
    """Existing YAML callers: same data, no ``return_response`` — unchanged."""
    result = await ha.services.async_call(
        DOMAIN,
        SERVICE,
        {"command": "echo old", "entity_id": ENTITY_ID},
        blocking=True,
    )

    assert result is None
    assert shield.calls == ["echo old"]


async def test_the_device_target_shape_resolves_through_the_registry(
    ha, integration, shield, media_player_module
):
    """An automation that targets the DEVICE sends ``device_id``: resolve it."""
    device = device_registry.async_get(ha).async_get_or_create(
        config_entry_id=ha._shield_entry.entry_id,
        identifiers={(DOMAIN, "shield-device")},
        name="Shield",
    )
    er.async_get(ha).async_get_or_create(
        "media_player",
        DOMAIN,
        "uid_shield",
        device_id=device.id,
        suggested_object_id="shield",
    )

    response = await ha.services.async_call(
        DOMAIN,
        SERVICE,
        {"command": "echo device", "device_id": device.id},
        blocking=True,
        return_response=True,
    )

    assert response == {"adb_response": "ok"}
    assert shield.calls == ["echo device"]


async def test_no_target_is_an_error_naming_what_to_pass(ha, integration, shield):
    """Never a silent no-op: HA's own validation is not the only guard."""
    with pytest.raises(ServiceValidationError) as err:
        await ha.services.async_call(
            DOMAIN, SERVICE, {"command": "echo x"}, blocking=True
        )

    assert err.value.translation_key == "no_target"
    assert shield.calls == []


async def test_two_targets_send_nothing(ha, integration, shield, media_player_module):
    """A raw shell command is never broadcast to Shields the user did not pick."""
    other = SimpleNamespace(adb_poller=FakePoller(), connected=True)
    media_player_module._ADB_COMMAND_TARGETS["media_player.other"] = other
    try:
        with pytest.raises(ServiceValidationError) as err:
            await ha.services.async_call(
                DOMAIN,
                SERVICE,
                {"command": "echo x", "entity_id": [ENTITY_ID, "media_player.other"]},
                blocking=True,
            )

        assert err.value.translation_key == "ambiguous_target"
        assert shield.calls == []
        assert other.adb_poller.calls == []
    finally:
        media_player_module._ADB_COMMAND_TARGETS.pop("media_player.other", None)


async def test_an_unknown_entity_is_an_error(ha, integration, shield):
    """Another integration's media player is not a Shield to run shell on."""
    with pytest.raises(ServiceValidationError) as err:
        await ha.services.async_call(
            DOMAIN,
            SERVICE,
            {"command": "echo x", "entity_id": "media_player.someone_else"},
            blocking=True,
        )

    assert err.value.translation_key == "unsupported_target"
    assert shield.calls == []


async def test_an_unreachable_shield_is_an_error_not_an_empty_response(
    ha, integration, shield, media_player_module
):
    """The acceptance's honesty clause: ADB down → error, not ``None`` back."""
    media_player_module._ADB_COMMAND_TARGETS[ENTITY_ID] = SimpleNamespace(
        adb_poller=None, connected=False
    )
    try:
        with pytest.raises(ServiceValidationError) as err:
            await ha.services.async_call(
                DOMAIN,
                SERVICE,
                {"command": "echo x", "entity_id": ENTITY_ID},
                blocking=True,
                return_response=True,
            )
        assert err.value.translation_key == "adb_unavailable"
    finally:
        media_player_module._ADB_COMMAND_TARGETS.pop(ENTITY_ID, None)


async def test_a_failing_transport_surfaces_the_error(
    ha, integration, shield, media_player_module
):
    """A transport failure mid-call propagates — never ``adb_response: None``."""
    poller = FakePoller(error=ConnectionError("adb socket dead"))
    media_player_module._ADB_COMMAND_TARGETS[ENTITY_ID] = SimpleNamespace(
        adb_poller=poller, connected=True
    )
    try:
        with pytest.raises(ConnectionError):
            await ha.services.async_call(
                DOMAIN,
                SERVICE,
                {"command": "echo x", "entity_id": ENTITY_ID},
                blocking=True,
                return_response=True,
            )
    finally:
        media_player_module._ADB_COMMAND_TARGETS.pop(ENTITY_ID, None)