"""Tests for Samsung dehumidifier support (issue #88, AY18CG7500GED).

HA-free like the rest of the suite: exercises the registry, discovery/
flatten, and the target-humidity/operating-mode write contracts.
"""

from custom_components.localthings.registry.adapter import flatten
from custom_components.localthings.registry.by_type import for_device_by_model
from custom_components.localthings.registry.discovery import discover
from custom_components.localthings.registry.entities import NumberDesc, SelectDesc
from tests.conftest import _load_device


def _dehumidifier():
    resources = _load_device("dehumidifier")
    info = resources["/information/vs/0"]
    reg = for_device_by_model(
        info["x.com.samsung.da.modelNum"],
        info["x.com.samsung.da.description"],
    )
    return reg, resources


def _bound():
    reg, resources = _dehumidifier()
    return discover(resources, reg.capabilities, reg.pattern_capabilities), resources


def _state():
    bound, resources = _bound()
    return flatten(bound, resources)


def _desc(key):
    bound, _ = _bound()
    return next(b.desc for b in bound if b.desc.key == key)


def test_model_resolves_to_dehumidifier_registry():
    reg, _ = _dehumidifier()
    assert reg is not None and reg.name == "dehumidifier"


def test_no_unbound_hrefs():
    """Every resource in the issue #88 dump binds or is covered -- clears
    the coverage-gap repair."""
    reg, resources = _dehumidifier()
    unbound = []
    discover(resources, reg.capabilities, reg.pattern_capabilities, log=unbound.append)
    assert unbound == []


def test_expected_state_keys_present():
    state = _state()
    for key in (
        "humidity",
        "target_humidity",
        "operating_mode",
        "power_switch",
        "auto_clean",
        "air_filter_status",
        "mute_once",
    ):
        assert key in state, key


def test_humidity_sensor_reads_current_value():
    state = _state()
    assert state["humidity"] == 47


def test_target_humidity_number_reads_desired_value():
    state = _state()
    assert state["target_humidity"] == 50


def test_target_humidity_write_contract():
    desc = _desc("target_humidity")
    assert isinstance(desc, NumberDesc)
    path, body = desc.write_fn("55", {})
    assert path == ["humidity", "vs", "0"]
    assert body == {"x.com.samsung.da.desiredHumidity": "55"}


def test_target_humidity_step_reads_live_increment():
    """Step comes from the device's own `increment` field rather than a
    hardcoded constant -- see the adding-device-support skill's 'never
    hard-code the one dump's values' section."""
    desc = _desc("target_humidity")
    assert desc.step_fn({"increment": "5"}) == 5
    assert desc.step_fn({"increment": "10"}) == 10
    # No live field: falls back to a sane default rather than raising.
    assert desc.step_fn({}) == 1


def test_target_humidity_has_no_hardcoded_bounds():
    """No range field is present in any dump seen so far -- native_min/max
    are deliberately left unset (falls back to HA's own 0-100 default for a
    percentage field) rather than a bound guessed from a spec sheet."""
    desc = _desc("target_humidity")
    assert desc.native_min is None
    assert desc.native_max is None
    assert desc.native_min_fn is None
    assert desc.native_max_fn is None


def test_operating_mode_select_options_come_from_live_supported_modes():
    """Options are read live from x.com.samsung.da.supportedModes, not a
    hardcoded tuple -- so a future device with a different mode set is
    handled automatically."""
    desc = _desc("operating_mode")
    assert isinstance(desc, SelectDesc)
    assert desc.options_field == "x.com.samsung.da.supportedModes"
    assert desc.options == ()


def test_operating_mode_write_contract():
    desc = _desc("operating_mode")
    path, body = desc.write_fn("Quiet", {})
    assert path == ["mode", "vs", "0"]
    assert body == {"x.com.samsung.da.modes": ["Quiet"]}


def test_operating_mode_reads_first_mode():
    state = _state()
    assert state["operating_mode"] == "Smart"