"""Tests for Samsung water-purifier support (issue #90, TP2X_WATERPURIFIER_20K).

HA-free like the rest of the suite: exercises the registry, discovery/
flatten, and the 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

from tests.conftest import _load_device


def _water_purifier():
    resources = _load_device('water_purifier')
    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 = _water_purifier()
    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_water_purifier_registry():
    reg, _ = _water_purifier()
    assert reg is not None and reg.name == 'water_purifier'


def test_no_unbound_hrefs():
    """Every resource in the issue #90 dump binds or is covered -- clears
    the coverage-gap repair."""
    reg, resources = _water_purifier()
    unbound = []
    discover(resources, reg.capabilities, reg.pattern_capabilities, log=unbound.append)
    assert unbound == []


def test_expected_state_keys_present():
    state = _state()
    for key in ('dispense_type', 'hot_water_temperature', 'dispense_capacity',
                'pouring', 'waterpurifier_status', 'filter_usage', 'filter_status',
                'hotwater_lock', 'coldwater_lock', 'buzz_lock'):
        assert key in state, key


def test_dispense_type_options_come_from_live_supported_types():
    desc = _desc('dispense_type')
    assert desc.options_field == 'x.com.samsung.da.supportedTypes'


def test_dispense_type_write_contract():
    desc = _desc('dispense_type')
    path, body = desc.write_fn('hotwater', {})
    assert path == ['setting', 'waterpurifier', 'vs', '0']
    assert body == {'x.com.samsung.da.desiredType': 'hotwater'}


def test_hot_water_temperature_is_a_select_not_a_number():
    """Only a handful of discrete temperatures are selectable (not a
    continuous range) -- confirmed by supportedHotTemperatures being a short
    enumerated list, not a [min, max] range field."""
    desc = _desc('hot_water_temperature')
    assert desc.options_field == 'x.com.samsung.da.supportedHotTemperatures'


def test_dispense_capacity_bounds_come_live_not_hardcoded():
    """Bounds and step come from the device's own desiredCapacityRange/
    capacityResolution fields, not a hardcoded constant -- see the
    adding-device-support skill's 'never hard-code the one dump's values'
    section."""
    desc = _desc('dispense_capacity')
    assert isinstance(desc, NumberDesc)
    assert desc.native_min is None
    assert desc.native_max is None
    assert desc.range_field == 'x.com.samsung.da.desiredCapacityRange'
    rep = {'x.com.samsung.da.desiredCapacityRange': ['50', '2000'],
           'x.com.samsung.da.capacityResolution': '10'}
    assert desc.step_fn(rep) == 10


def test_dispense_capacity_write_contract():
    desc = _desc('dispense_capacity')
    path, body = desc.write_fn('550', {})
    assert path == ['setting', 'waterpurifier', 'vs', '0']
    assert body == {'x.com.samsung.da.desiredCapacity': '550'}


def test_lock_switches_read_unlocked_as_off():
    state = _state()
    assert state['hotwater_lock'] is False
    assert state['coldwater_lock'] is False
    assert state['buzz_lock'] is False


def test_lock_switch_write_contracts():
    hot = _desc('hotwater_lock')
    cold = _desc('coldwater_lock')
    buzz = _desc('buzz_lock')
    assert hot.write_fn('On', {}) == (
        ['status', 'lock', 'vs', '0'], {'x.com.samsung.da.hotwaterLock': 'Locked'})
    assert cold.write_fn('Off', {}) == (
        ['status', 'lock', 'vs', '0'], {'x.com.samsung.da.coldwaterLock': 'Unlocked'})
    assert buzz.write_fn('On', {}) == (
        ['status', 'lock', 'vs', '0'], {'x.com.samsung.da.buzzLock': 'Locked'})


def test_favorite_capacity_options_come_from_live_capacity_list():
    desc = _desc('favorite_capacity')
    assert desc.options_field == 'x.com.samsung.da.capacityList'


def test_sterilize_timestamps_parsed_as_utc():
    state = _state()
    assert state['sterilize_last_time'].tzinfo is not None
    assert state['sterilize_plan_time'].tzinfo is not None


def test_mode_hrefs_are_ignored_not_guessed():
    """/mode/vs/0's supportedModes carries a single opaque wizard token and
    modes reports an unrelated value not even in supportedModes -- internal
    plumbing, left unmodeled per the 'don't guess' rule rather than exposed
    as a nonsensical select."""
    from custom_components.localthings.registry.capabilities import water_purifier
    ignored_hrefs = {cap.href for cap in water_purifier.COVERAGE}
    assert '/mode/vs/0' in ignored_hrefs
    assert '/automation/waterpurifier/vs/0' in ignored_hrefs


# ---------------------------------------------------------------------------
# Coffee-capable variant (issue #107) -- /favorite/coffee/vs/0 and
# /favorite/hotwater/vs/0, not present in issue #90's original dump.
# ---------------------------------------------------------------------------

def _water_purifier_coffee():
    resources = _load_device('water_purifier_coffee')
    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_coffee():
    reg, resources = _water_purifier_coffee()
    return discover(resources, reg.capabilities, reg.pattern_capabilities), resources


def _state_coffee():
    bound, resources = _bound_coffee()
    return flatten(bound, resources)


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


def _desc_coffee_by_href(key, href):
    """Like _desc_coffee, but disambiguates descriptors that share a key
    across hrefs (hotwater_lock: LOCK's hotwaterLock field and
    FAVORITE_HOTWATER's switchHotwater fallback, issue #144)."""
    bound, _ = _bound_coffee()
    return next(b.desc for b in bound if b.desc.key == key and b.href == href)


def test_coffee_variant_no_unbound_hrefs():
    """Every resource in the issue #107 dump binds or is covered, including
    the four coffee-recipe hrefs not present in issue #90's dump."""
    reg, resources = _water_purifier_coffee()
    unbound = []
    discover(resources, reg.capabilities, reg.pattern_capabilities, log=unbound.append)
    assert unbound == []


def test_coffee_variant_expected_state_keys_present():
    state = _state_coffee()
    for key in ('favorite_coffee_enabled', 'coffee_brew_status',
                'hotwater_lock', 'favorite_hotwater_temperature'):
        assert key in state, key


def test_favorite_coffee_write_contract():
    desc = _desc_coffee('favorite_coffee_enabled')
    assert desc.write_fn('On', {}) == (
        ['favorite', 'coffee', 'vs', '0'], {'favorite.activate': 'On'})
    assert desc.write_fn('Off', {}) == (
        ['favorite', 'coffee', 'vs', '0'], {'favorite.activate': 'Off'})


def test_favorite_hotwater_switch_is_a_lock_not_an_enable_flag():
    """issue #144: switchHotwater's value domain is Locked/Unlocked, not an
    enable flag, and it's misspelled as "Favorite hot water" -- it's the same
    hot-water lock as LOCK.hotwater_lock, just surfaced through this href on
    boards (like this fixture's) that don't populate /status/lock/vs/0's
    hotwaterLock field."""
    lock = _desc_coffee_by_href('hotwater_lock', '/favorite/hotwater/vs/0')
    assert lock.write_fn('On', {}) == (
        ['favorite', 'hotwater', 'vs', '0'], {'x.com.samsung.da.switchHotwater': 'Locked'})
    assert lock.write_fn('Off', {}) == (
        ['favorite', 'hotwater', 'vs', '0'], {'x.com.samsung.da.switchHotwater': 'Unlocked'})
    assert lock.value_fn('Unlocked') is False
    assert lock.value_fn('Locked') is True


def test_favorite_hotwater_lock_wins_in_flattened_state():
    """adapter.flatten() -- the actual source of coordinator.data every
    switch's is_on reads -- only honours exists_fn, never entity.py's
    implicit own-field-presence default. So it's not enough for the
    *registered* entity to resolve correctly (test_expected_state_keys_present
    territory); the shared 'hotwater_lock' key in the flattened dict itself
    must reflect the live switchHotwater value, not a stale phantom from
    LOCK's ungated hotwaterLock read (issue #144). This fixture's
    switchHotwater reads 'Unlocked'; without exists_fn on *both* sides of the
    pair, LOCK's descriptor computes None != 'Unlocked' == True regardless,
    and flatten() would pick whichever of the two entities happens to be
    processed last."""
    state = _state_coffee()
    assert state['hotwater_lock'] is False


def test_exactly_one_hotwater_lock_descriptor_exists_per_resource_state():
    """Both LOCK.hotwater_lock and FAVORITE_HOTWATER's switchHotwater
    fallback are always bound on this fixture (their hrefs are both always
    present) -- discrimination happens entirely in exists_fn. Exactly one of
    the two must ever pass, regardless of iteration order, or two switch
    entities would be registered with the same unique_id."""
    bound, resources = _bound_coffee()
    candidates = [b for b in bound if b.desc.key == 'hotwater_lock']
    assert len(candidates) == 2
    included = [b for b in candidates
                if b.desc.exists_fn(resources.get(b.href) or {}, resources)]
    assert len(included) == 1
    assert included[0].href == '/favorite/hotwater/vs/0'


def test_hotwater_lock_fallback_gating_across_status_lock_states():
    """The fallback (FAVORITE_HOTWATER's switchHotwater descriptor) must
    activate only once /status/lock/vs/0 is confirmed to lack hotwaterLock --
    never while that resource is an unfetched stub ({}), and never when it
    does carry the field. LOCK's own descriptor is the mirror image."""
    fallback = _desc_coffee_by_href('hotwater_lock', '/favorite/hotwater/vs/0')
    primary = _desc_coffee_by_href('hotwater_lock', '/status/lock/vs/0')
    own_rep = {'x.com.samsung.da.switchHotwater': 'Unlocked'}

    # /status/lock/vs/0 absent entirely -- device genuinely lacks it.
    assert fallback.exists_fn(own_rep, {}) is True

    # /status/lock/vs/0 present but not yet fetched (a stub): outcome
    # pending, so the fallback must defer to LOCK rather than assume absence.
    stub_resources = {'/status/lock/vs/0': {}}
    assert fallback.exists_fn(own_rep, stub_resources) is False
    assert primary.exists_fn({}, stub_resources) is True

    # /status/lock/vs/0 fetched and confirmed to lack hotwaterLock (this
    # fixture's actual shape) -- the fallback wins.
    absent_resources = {'/status/lock/vs/0': {'x.com.samsung.da.coldwaterLock': 'Unlocked'}}
    assert fallback.exists_fn(own_rep, absent_resources) is True
    assert primary.exists_fn(absent_resources['/status/lock/vs/0'], absent_resources) is False

    # /status/lock/vs/0 fetched and does carry hotwaterLock -- primary wins.
    present_resources = {'/status/lock/vs/0': {'x.com.samsung.da.hotwaterLock': 'Unlocked'}}
    assert fallback.exists_fn(own_rep, present_resources) is False
    assert primary.exists_fn(present_resources['/status/lock/vs/0'], present_resources) is True

    # The fallback also re-asserts its own field, since it no longer gets
    # that check for free once it shares LOCK's key (issue #144 review).
    assert fallback.exists_fn({}, {}) is False


def test_favorite_hotwater_temperature_options_come_from_live_supported_list():
    desc = _desc_coffee('favorite_hotwater_temperature')
    assert desc.options_field == 'x.com.samsung.da.favorite.supportedList'


def test_coffee_recipe_hrefs_are_ignored_not_guessed():
    """Static capability-advertisement blobs or empty resources -- no live
    'current recipe'/'current custom slot' field to expose, per the 'don't
    guess' rule."""
    from custom_components.localthings.registry.capabilities import water_purifier
    ignored_hrefs = {cap.href for cap in water_purifier.COVERAGE}
    for href in ('/brand/recipe/info/vs/0', '/coffee/custom/recipe/vs/0',
                 '/recipe/coffee/vs/0', '/recipe/coffee/deletion/vs/0'):
        assert href in ignored_hrefs, href


# ---------------------------------------------------------------------------
# AILITE_DA-REF-WATERPURIFIER board (issue #196, RWP70F15ANW) -- a
# coffee-capable variant on a different board family than issue #90/#107's
# TP2X_WATERPURIFIER_20K, whose modelNum's 'REF' token would otherwise
# misroute it to the refrigerator registry (see test_by_type.py's
# TestBoardTokenAmbiguity carve-out). Also the first dump to expose
# /cup/state/vs/0, /statistic/pour/vs/0, and the settings/sound/* trio on
# this device type.
# ---------------------------------------------------------------------------

def _water_purifier_ailite():
    resources = _load_device('water_purifier_ailite_25k')
    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_ailite():
    reg, resources = _water_purifier_ailite()
    return discover(resources, reg.capabilities, reg.pattern_capabilities), resources


def _state_ailite():
    bound, resources = _bound_ailite()
    return flatten(bound, resources)


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


def test_ailite_model_resolves_to_water_purifier_not_refrigerator():
    reg, _ = _water_purifier_ailite()
    assert reg is not None and reg.name == 'water_purifier'


def test_ailite_no_unbound_hrefs():
    reg, resources = _water_purifier_ailite()
    unbound = []
    discover(resources, reg.capabilities, reg.pattern_capabilities, log=unbound.append)
    assert unbound == []


def test_ailite_expected_state_keys_present():
    state = _state_ailite()
    for key in ('cup_state', 'sound_mode', 'sound_output', 'sound_volume',
                'alarm_in_mute', 'last_pour_type', 'last_pour_capacity'):
        assert key in state, key


def test_ailite_hot_water_temperature_gated_off_without_supported_list():
    """This board reports tempDesiredHotWater but no
    supportedHotTemperatures (only a hotwaterRange/hotwaterLevel pair whose
    write contract isn't confirmed) -- the exact shape that used to make
    HA's select show 'unknown' (issue #196), since current_option isn't in
    an empty options list. The descriptor must gate off entirely rather than
    register with empty options."""
    state = _state_ailite()
    assert 'hot_water_temperature' not in state


def test_ailite_sound_mode_options_come_from_live_supported_modes():
    """This board's supportedModes (voice/fixedTone/mute) differs from both
    laundry.SOUND_MODE's hardcoded voice/tone/mute and air_purifier.SOUND_MODE's
    mute/buzzer -- reusing either would reject a value this device actually
    supports, per the oven._OVEN_MODES lesson from issue #138."""
    desc = _desc_ailite('sound_mode')
    assert desc.options_field == 'supportedModes'
    assert desc.translation_key == 'water_purifier_sound_mode'


def test_ailite_sound_volume_bounds_come_live_not_hardcoded():
    desc = _desc_ailite('sound_volume')
    assert isinstance(desc, NumberDesc)
    assert desc.native_min is None and desc.native_max is None
    rep = {'minLevel': '0', 'maxLevel': '15', 'resolution': '5'}
    assert desc.native_min_fn(rep) == 0
    assert desc.native_max_fn(rep) == 15
    assert desc.step_fn(rep) == 5


def test_ailite_alarm_in_mute_is_read_only():
    """No sibling field advertises alarmInMute as user-settable -- surfaced
    as a read-only diagnostic per the 'don't guess' rule rather than an
    invented switch."""
    from custom_components.localthings.registry.entities import BinarySensorDesc
    desc = _desc_ailite('alarm_in_mute')
    assert isinstance(desc, BinarySensorDesc)
    assert desc.value_fn('true') is True
    assert desc.value_fn('false') is False