"""Sanity check for diagnostics.py's issue #177 additions (sub_units,
sub_units_skipped, sub_unit_probes) against a real composite-device
discovery run -- makes sure the new blocks are actually reachable/shaped
right, not just that the coordinator's own attributes look correct in
isolation (test_subdevice_discovery.py covers that)."""
from __future__ import annotations

from homeassistant.core import HomeAssistant

from custom_components.localthings.const import DOMAIN
from custom_components.localthings.diagnostics import (
    async_get_config_entry_diagnostics,
)

from tests.test_subdevice_discovery import _coordinator, _discover


async def test_diagnostics_reports_materialized_and_skipped_sub_units(
    hass: HomeAssistant, enable_custom_integrations,
) -> None:
    coordinator = _coordinator(hass)
    await _discover(coordinator, 'airconditioner_artik051_dongle_fac_18k')
    hass.data.setdefault(DOMAIN, {})[coordinator._entry.entry_id] = coordinator

    diag = await async_get_config_entry_diagnostics(hass, coordinator._entry)

    sub_unit_keys = {su['key'] for su in diag['sub_units']}
    skipped_keys = {su['key'] for su in diag['sub_units_skipped']}
    assert sub_unit_keys == {'1'}
    assert skipped_keys == {'2'}
    assert diag['sub_units'][0]['bound_entity_count'] > 0
    assert diag['sub_units_skipped'][0]['hrefs']
    assert '/multidevice/vs/0' in diag['sub_unit_probes']
    # The reporter's hand-read value, carried in the fixture's `probes` map
    # (it belongs to no batch -- see that fixture's seeds_note). Two real
    # units, master + bedroom, independently corroborating the gate's
    # decision to skip /device/2. Reported on its own, never as a resource.
    assert diag['multidevice'] == {'x.com.samsung.da.numofsubdevice': '2'}
    assert '/multidevice/vs/0' not in diag['resources']


async def test_top_level_resources_is_the_master_unit_only(
    hass: HomeAssistant, enable_custom_integrations,
) -> None:
    """`resources` reports this unit's own hrefs and nothing else.

    It used to be `last_resources` raw -- the union across every live unit,
    keyed by real hrefs -- so a sibling's /mode/vs/1 sat in it alongside the
    master's /mode/vs/0 with no attribution, contradicting both the module
    docstring and the adding-device-support skill ("the parsed /device/0
    snapshot"). Each sibling carries its own canonicalized block instead.
    """
    coordinator = _coordinator(hass)
    await _discover(coordinator, 'airconditioner_artik051_dongle_fac_18k')
    hass.data.setdefault(DOMAIN, {})[coordinator._entry.entry_id] = coordinator

    diag = await async_get_config_entry_diagnostics(hass, coordinator._entry)

    assert not [h for h in diag['resources'] if h.endswith('/1')]
    assert '/mode/vs/0' in diag['resources']
    # The sibling's own block carries its state, canonicalized -- '/mode/vs/0',
    # not the '/mode/vs/1' it actually answers on.
    unit1 = diag['sub_units'][0]
    assert '/mode/vs/0' in unit1['resources']
    assert not [h for h in unit1['resources'] if h.endswith('/1')]
    assert unit1['resources']['/power/vs/0']['x.com.samsung.da.power'] == 'On'


async def test_rejected_candidate_reps_reach_diagnostics_but_not_the_cache(
    hass: HomeAssistant, enable_custom_integrations,
) -> None:
    """A gate-rejected slot is never polled again, so anything applied to the
    state cache for it would sit frozen at its first-discovery value while
    looking as live as every other href. It's kept out of the cache entirely
    and reported only under its own sub_units_skipped entry -- which is also
    the only place a reader can go to second-guess the gate."""
    coordinator = _coordinator(hass)
    await _discover(coordinator, 'airconditioner_artik051_dongle_fac_18k')
    hass.data.setdefault(DOMAIN, {})[coordinator._entry.entry_id] = coordinator

    assert not [h for h in coordinator.last_resources if h.endswith('/2')]

    diag = await async_get_config_entry_diagnostics(hass, coordinator._entry)
    skipped = diag['sub_units_skipped'][0]
    # Present, canonicalized, and visibly the empty state the gate rejected.
    assert skipped['resources']['/power/vs/0'] == {}
    assert skipped['resources']['/mode/vs/0'] == {}
    assert skipped['resources']['/information/vs/0']


async def test_diagnostics_reports_prefixed_sub_unit(
    hass: HomeAssistant, enable_custom_integrations,
) -> None:
    coordinator = _coordinator(hass)
    await _discover(coordinator, 'airconditioner_fac_bora_2in1')
    hass.data.setdefault(DOMAIN, {})[coordinator._entry.entry_id] = coordinator

    diag = await async_get_config_entry_diagnostics(hass, coordinator._entry)

    assert len(diag['sub_units']) == 1
    assert diag['sub_units'][0]['kind'] == 'prefixed'
    # diagnostics reports the raw modelNum field verbatim (board revision/
    # capability-bitmap suffix included), unlike device_info_for's model
    # (split at '|') -- confirms it's still the wall unit's own identity,
    # not the master's TP2X_FAC_BORA_21K.
    assert diag['sub_units'][0]['model'].startswith('TP2X_FAC_BORA_RAC_21K')
    assert diag['sub_units_skipped'] == []