"""Tests for the Q10 B01 map content trait.

The Q10 map API is push-driven: the device publishes ``MAP_RESPONSE`` messages
and the trait updates its cached state from them via ``update_from_map_response``
(there is no synchronous get-map request).
"""

import asyncio
from collections.abc import AsyncGenerator
from pathlib import Path
from typing import cast
from unittest.mock import Mock

import pytest

from roborock.cli import _await_q10_map_push, cli
from roborock.devices.traits.b01.q10 import Q10PropertiesApi, create
from roborock.devices.traits.b01.q10.map import MapContentTrait
from roborock.map.b01_q10_map_parser import Q10Point, parse_map_packet, parse_trace_packet
from roborock.protocols.b01_q10_protocol import Q10Message

from .conftest import FakeB01Q10Channel

FIXTURE = Path("tests/map/testdata/b01_q10_map.bin")
TRACE_FIXTURE = Path("tests/map/testdata/b01_q10_trace.bin")


def test_update_from_map_packet_populates_image_and_rooms() -> None:
    """A parsed 01 01 map packet populates the image, rooms and map data."""
    packet = parse_map_packet(FIXTURE.read_bytes())
    trait = MapContentTrait()
    updates: list[None] = []
    trait.add_update_listener(lambda: updates.append(None))

    trait.update_from_map_packet(packet)

    assert trait.image_content is not None
    assert trait.image_content[:8] == b"\x89PNG\r\n\x1a\n"
    assert {room.id: room.name for room in trait.rooms} == {2: "Living Room", 3: "Bedroom"}
    assert trait.map_data is not None
    assert len(updates) == 1


def test_update_from_trace_packet_populates_path_and_position() -> None:
    """A parsed 02 01 trace packet populates the path and robot position."""
    packet = parse_trace_packet(TRACE_FIXTURE.read_bytes())
    trait = MapContentTrait()
    updates: list[None] = []
    trait.add_update_listener(lambda: updates.append(None))

    trait.update_from_trace_packet(packet)

    assert [(p.x, p.y) for p in trait.path] == [(169, 0)]
    assert trait.robot_position is not None
    assert (trait.robot_position.x, trait.robot_position.y) == (169, 0)
    assert len(updates) == 1


def test_q10_position_is_available_as_top_level_cli_command() -> None:
    assert "q10-position" in cli.commands


# --- CLI push waiting --------------------------------------------------------


class _FakeQ10Properties:
    def __init__(self) -> None:
        self.map = MapContentTrait()
        self.refresh_count = 0

    async def refresh(self) -> None:
        self.refresh_count += 1


class _FakeQ10PropertiesWithTrace(_FakeQ10Properties):
    async def refresh(self) -> None:
        await super().refresh()
        self.map.update_from_trace_packet(parse_trace_packet(TRACE_FIXTURE.read_bytes()))


async def test_await_q10_map_push_waits_for_fresh_update() -> None:
    """A cached trace alone is not treated as a successful new map push."""
    properties = _FakeQ10Properties()
    properties.map.path = [Q10Point(1, 2)]

    got_trace = await _await_q10_map_push(
        cast(Q10PropertiesApi, properties), lambda: bool(properties.map.path), timeout=0.01
    )

    assert got_trace is False
    assert properties.refresh_count == 1


async def test_await_q10_map_push_returns_true_after_update() -> None:
    properties = _FakeQ10PropertiesWithTrace()

    got_trace = await _await_q10_map_push(
        cast(Q10PropertiesApi, properties), lambda: bool(properties.map.path), timeout=0.01
    )

    assert got_trace is True
    assert [(p.x, p.y) for p in properties.map.path] == [(169, 0)]


async def test_await_q10_map_push_can_fall_back_to_cached_map_on_timeout() -> None:
    properties = _FakeQ10Properties()
    properties.map.image_content = b"cached-png"

    got_map = await _await_q10_map_push(
        cast(Q10PropertiesApi, properties),
        lambda: properties.map.image_content is not None,
        timeout=0.01,
        allow_cached_on_timeout=True,
    )

    assert got_map is True
    assert properties.refresh_count == 1


# --- Integration through the Q10PropertiesApi subscribe loop -----------------


@pytest.fixture(name="message_queue")
def message_queue_fixture() -> asyncio.Queue[Q10Message]:
    return asyncio.Queue()


@pytest.fixture(name="mock_channel")
def mock_channel_fixture(message_queue: asyncio.Queue[Q10Message]) -> FakeB01Q10Channel:
    channel = FakeB01Q10Channel()

    async def mock_stream() -> AsyncGenerator[Q10Message, None]:
        while True:
            yield await message_queue.get()

    setattr(channel, "subscribe_stream", Mock(side_effect=mock_stream))
    return channel


@pytest.fixture(name="q10_api")
async def q10_api_fixture(mock_channel: FakeB01Q10Channel) -> AsyncGenerator[Q10PropertiesApi, None]:
    api = create(mock_channel)
    await api.start()
    yield api
    await api.close()


async def _wait_for(predicate, timeout: float = 2.0) -> None:
    async with asyncio.timeout(timeout):
        while not predicate():
            await asyncio.sleep(0.01)


async def test_subscribe_loop_routes_map_push(
    q10_api: Q10PropertiesApi,
    message_queue: asyncio.Queue[Q10Message],
) -> None:
    """A map pushed onto the stream is routed to the map trait by the loop."""
    assert q10_api.map.image_content is None

    message_queue.put_nowait(parse_map_packet(FIXTURE.read_bytes()))

    await _wait_for(lambda: q10_api.map.image_content is not None)
    assert {room.id: room.name for room in q10_api.map.rooms} == {2: "Living Room", 3: "Bedroom"}


async def test_subscribe_loop_routes_trace_push(
    q10_api: Q10PropertiesApi,
    message_queue: asyncio.Queue[Q10Message],
) -> None:
    """A trace pushed onto the stream is routed to the map trait by the loop."""
    assert not q10_api.map.path

    message_queue.put_nowait(parse_trace_packet(TRACE_FIXTURE.read_bytes()))

    await _wait_for(lambda: bool(q10_api.map.path))
    assert q10_api.map.robot_position is not None
