"""Pure operational-store rules independent of the HA WebSocket harness."""
import pytest

from custom_components.houseplan.virtual_lights import (
    async_reconcile_virtual_lights,
    async_toggle_virtual_light,
    async_virtual_light_snapshot,
    eligible_virtual_light_ids,
)


class FakeStore:
    def __init__(self, data=None):
        self.data = data
        self.writes = []

    async def async_load(self):
        return self.data

    async def async_save(self, data):
        self.data = data
        self.writes.append(data)


def _config(*markers):
    return {"spaces": [], "markers": list(markers), "settings": {}}


def _manual(marker_id, **extra):
    return {
        "id": marker_id, "binding": "virtual", "is_light": True,
        "tap_action": "toggle", **extra,
    }


def test_eligibility_is_the_exact_triple_and_hidden_is_not_lifecycle():
    config = _config(
        _manual("eligible", hidden=True),
        _manual("wrong-action", tap_action="info"),
        _manual("wrong-role", is_light=False),
        _manual("removed", removed=True),
        {"id": "ha", "binding": "entity:light.lamp", "is_light": True, "tap_action": "toggle"},
    )
    assert eligible_virtual_light_ids(config) == {"eligible"}


@pytest.mark.asyncio
async def test_revision_gap_fails_safe_on_and_known_transition_preserves_only_eligible():
    store = FakeStore({"rev": 5, "config_rev": 2, "off": ["keep", "drop"]})
    gap = await async_virtual_light_snapshot(store, _config(_manual("keep")), 4)
    assert gap == {"rev": 6, "config_rev": 4, "off": []}

    store = FakeStore({"rev": 8, "config_rev": 4, "off": ["keep", "drop"]})
    carried = await async_reconcile_virtual_lights(
        store,
        _config(_manual("keep", hidden=True), _manual("drop", is_light=False)),
        5,
        previous_config_rev=4,
    )
    assert carried == {"rev": 9, "config_rev": 5, "off": ["keep"]}


@pytest.mark.asyncio
async def test_toggle_accepts_only_an_id_and_inverts_server_current_state():
    store = FakeStore()
    config = _config(_manual("lamp"))
    first = await async_toggle_virtual_light(store, config, 1, "lamp")
    second = await async_toggle_virtual_light(store, config, 1, "lamp")
    assert first == {"marker_id": "lamp", "on": False, "rev": 1}
    assert second == {"marker_id": "lamp", "on": True, "rev": 2}
    assert await async_toggle_virtual_light(store, config, 1, "missing") is None