"""Tests for the Entity Registry."""
import asyncio
from unittest.mock import patch

import asynctest
import pytest

from homeassistant.core import valid_entity_id, callback
from homeassistant.helpers import entity_registry

from tests.common import mock_registry, flush_store


YAML__OPEN_PATH = "homeassistant.util.yaml.loader.open"


@pytest.fixture
def registry(hass):
    """Return an empty, loaded, registry."""
    return mock_registry(hass)


@pytest.fixture
def update_events(hass):
    """Capture update events."""
    events = []

    @callback
    def async_capture(event):
        events.append(event.data)

    hass.bus.async_listen(entity_registry.EVENT_ENTITY_REGISTRY_UPDATED, async_capture)

    return events


async def test_get_or_create_returns_same_entry(hass, registry, update_events):
    """Make sure we do not duplicate entries."""
    entry = registry.async_get_or_create("light", "hue", "1234")
    entry2 = registry.async_get_or_create("light", "hue", "1234")

    await hass.async_block_till_done()

    assert len(registry.entities) == 1
    assert entry is entry2
    assert entry.entity_id == "light.hue_1234"
    assert len(update_events) == 1
    assert update_events[0]["action"] == "create"
    assert update_events[0]["entity_id"] == entry.entity_id


def test_get_or_create_suggested_object_id(registry):
    """Test that suggested_object_id works."""
    entry = registry.async_get_or_create(
        "light", "hue", "1234", suggested_object_id="beer"
    )

    assert entry.entity_id == "light.beer"


def test_get_or_create_suggested_object_id_conflict_register(registry):
    """Test that we don't generate an entity id that is already registered."""
    entry = registry.async_get_or_create(
        "light", "hue", "1234", suggested_object_id="beer"
    )
    entry2 = registry.async_get_or_create(
        "light", "hue", "5678", suggested_object_id="beer"
    )

    assert entry.entity_id == "light.beer"
    assert entry2.entity_id == "light.beer_2"


def test_get_or_create_suggested_object_id_conflict_existing(hass, registry):
    """Test that we don't generate an entity id that currently exists."""
    hass.states.async_set("light.hue_1234", "on")
    entry = registry.async_get_or_create("light", "hue", "1234")
    assert entry.entity_id == "light.hue_1234_2"


def test_create_triggers_save(hass, registry):
    """Test that registering entry triggers a save."""
    with patch.object(registry, "async_schedule_save") as mock_schedule_save:
        registry.async_get_or_create("light", "hue", "1234")

    assert len(mock_schedule_save.mock_calls) == 1


async def test_loading_saving_data(hass, registry):
    """Test that we load/save data correctly."""
    orig_entry1 = registry.async_get_or_create("light", "hue", "1234")
    orig_entry2 = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id"
    )

    assert len(registry.entities) == 2

    # Now load written data in new registry
    registry2 = entity_registry.EntityRegistry(hass)
    await flush_store(registry._store)
    await registry2.async_load()

    # Ensure same order
    assert list(registry.entities) == list(registry2.entities)
    new_entry1 = registry.async_get_or_create("light", "hue", "1234")
    new_entry2 = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id"
    )

    assert orig_entry1 == new_entry1
    assert orig_entry2 == new_entry2


def test_generate_entity_considers_registered_entities(registry):
    """Test that we don't create entity id that are already registered."""
    entry = registry.async_get_or_create("light", "hue", "1234")
    assert entry.entity_id == "light.hue_1234"
    assert registry.async_generate_entity_id("light", "hue_1234") == "light.hue_1234_2"


def test_generate_entity_considers_existing_entities(hass, registry):
    """Test that we don't create entity id that currently exists."""
    hass.states.async_set("light.kitchen", "on")
    assert registry.async_generate_entity_id("light", "kitchen") == "light.kitchen_2"


def test_is_registered(registry):
    """Test that is_registered works."""
    entry = registry.async_get_or_create("light", "hue", "1234")
    assert registry.async_is_registered(entry.entity_id)
    assert not registry.async_is_registered("light.non_existing")


async def test_loading_extra_values(hass, hass_storage):
    """Test we load extra data from the registry."""
    hass_storage[entity_registry.STORAGE_KEY] = {
        "version": entity_registry.STORAGE_VERSION,
        "data": {
            "entities": [
                {
                    "entity_id": "test.named",
                    "platform": "super_platform",
                    "unique_id": "with-name",
                    "name": "registry override",
                },
                {
                    "entity_id": "test.no_name",
                    "platform": "super_platform",
                    "unique_id": "without-name",
                },
                {
                    "entity_id": "test.disabled_user",
                    "platform": "super_platform",
                    "unique_id": "disabled-user",
                    "disabled_by": "user",
                },
                {
                    "entity_id": "test.disabled_hass",
                    "platform": "super_platform",
                    "unique_id": "disabled-hass",
                    "disabled_by": "hass",
                },
            ]
        },
    }

    registry = await entity_registry.async_get_registry(hass)

    entry_with_name = registry.async_get_or_create(
        "test", "super_platform", "with-name"
    )
    entry_without_name = registry.async_get_or_create(
        "test", "super_platform", "without-name"
    )
    assert entry_with_name.name == "registry override"
    assert entry_without_name.name is None
    assert not entry_with_name.disabled

    entry_disabled_hass = registry.async_get_or_create(
        "test", "super_platform", "disabled-hass"
    )
    entry_disabled_user = registry.async_get_or_create(
        "test", "super_platform", "disabled-user"
    )
    assert entry_disabled_hass.disabled
    assert entry_disabled_hass.disabled_by == entity_registry.DISABLED_HASS
    assert entry_disabled_user.disabled
    assert entry_disabled_user.disabled_by == entity_registry.DISABLED_USER


def test_async_get_entity_id(registry):
    """Test that entity_id is returned."""
    entry = registry.async_get_or_create("light", "hue", "1234")
    assert entry.entity_id == "light.hue_1234"
    assert registry.async_get_entity_id("light", "hue", "1234") == "light.hue_1234"
    assert registry.async_get_entity_id("light", "hue", "123") is None


async def test_updating_config_entry_id(hass, registry, update_events):
    """Test that we update config entry id in registry."""
    entry = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id-1"
    )
    entry2 = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id-2"
    )
    assert entry.entity_id == entry2.entity_id
    assert entry2.config_entry_id == "mock-id-2"

    await hass.async_block_till_done()

    assert len(update_events) == 2
    assert update_events[0]["action"] == "create"
    assert update_events[0]["entity_id"] == entry.entity_id
    assert update_events[1]["action"] == "update"
    assert update_events[1]["entity_id"] == entry.entity_id


async def test_removing_config_entry_id(hass, registry, update_events):
    """Test that we update config entry id in registry."""
    entry = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id-1"
    )
    assert entry.config_entry_id == "mock-id-1"
    registry.async_clear_config_entry("mock-id-1")

    assert not registry.entities

    await hass.async_block_till_done()

    assert len(update_events) == 2
    assert update_events[0]["action"] == "create"
    assert update_events[0]["entity_id"] == entry.entity_id
    assert update_events[1]["action"] == "remove"
    assert update_events[1]["entity_id"] == entry.entity_id


async def test_migration(hass):
    """Test migration from old data to new."""
    old_conf = {
        "light.kitchen": {
            "config_entry_id": "test-config-id",
            "unique_id": "test-unique",
            "platform": "test-platform",
            "name": "Test Name",
            "disabled_by": "hass",
        }
    }
    with patch("os.path.isfile", return_value=True), patch("os.remove"), patch(
        "homeassistant.helpers.entity_registry.load_yaml", return_value=old_conf
    ):
        registry = await entity_registry.async_get_registry(hass)

    assert registry.async_is_registered("light.kitchen")
    entry = registry.async_get_or_create(
        domain="light",
        platform="test-platform",
        unique_id="test-unique",
        config_entry_id="test-config-id",
    )
    assert entry.name == "Test Name"
    assert entry.disabled_by == "hass"
    assert entry.config_entry_id == "test-config-id"


async def test_loading_invalid_entity_id(hass, hass_storage):
    """Test we autofix invalid entity IDs."""
    hass_storage[entity_registry.STORAGE_KEY] = {
        "version": entity_registry.STORAGE_VERSION,
        "data": {
            "entities": [
                {
                    "entity_id": "test.invalid__middle",
                    "platform": "super_platform",
                    "unique_id": "id-invalid-middle",
                    "name": "registry override",
                },
                {
                    "entity_id": "test.invalid_end_",
                    "platform": "super_platform",
                    "unique_id": "id-invalid-end",
                },
                {
                    "entity_id": "test._invalid_start",
                    "platform": "super_platform",
                    "unique_id": "id-invalid-start",
                },
            ]
        },
    }

    registry = await entity_registry.async_get_registry(hass)

    entity_invalid_middle = registry.async_get_or_create(
        "test", "super_platform", "id-invalid-middle"
    )

    assert valid_entity_id(entity_invalid_middle.entity_id)

    entity_invalid_end = registry.async_get_or_create(
        "test", "super_platform", "id-invalid-end"
    )

    assert valid_entity_id(entity_invalid_end.entity_id)

    entity_invalid_start = registry.async_get_or_create(
        "test", "super_platform", "id-invalid-start"
    )

    assert valid_entity_id(entity_invalid_start.entity_id)


async def test_loading_race_condition(hass):
    """Test only one storage load called when concurrent loading occurred ."""
    with asynctest.patch(
        "homeassistant.helpers.entity_registry.EntityRegistry.async_load"
    ) as mock_load:
        results = await asyncio.gather(
            entity_registry.async_get_registry(hass),
            entity_registry.async_get_registry(hass),
        )

        mock_load.assert_called_once_with()
        assert results[0] == results[1]


async def test_update_entity_unique_id(registry):
    """Test entity's unique_id is updated."""
    entry = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id-1"
    )
    new_unique_id = "1234"
    with patch.object(registry, "async_schedule_save") as mock_schedule_save:
        updated_entry = registry.async_update_entity(
            entry.entity_id, new_unique_id=new_unique_id
        )
    assert updated_entry != entry
    assert updated_entry.unique_id == new_unique_id
    assert mock_schedule_save.call_count == 1


async def test_update_entity_unique_id_conflict(registry):
    """Test migration raises when unique_id already in use."""
    entry = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id-1"
    )
    entry2 = registry.async_get_or_create(
        "light", "hue", "1234", config_entry_id="mock-id-1"
    )
    with patch.object(
        registry, "async_schedule_save"
    ) as mock_schedule_save, pytest.raises(ValueError):
        registry.async_update_entity(entry.entity_id, new_unique_id=entry2.unique_id)
    assert mock_schedule_save.call_count == 0


async def test_update_entity(registry):
    """Test updating entity."""
    entry = registry.async_get_or_create(
        "light", "hue", "5678", config_entry_id="mock-id-1"
    )

    for attr_name, new_value in (
        ("name", "new name"),
        ("disabled_by", entity_registry.DISABLED_USER),
    ):
        changes = {attr_name: new_value}
        updated_entry = registry.async_update_entity(entry.entity_id, **changes)

        assert updated_entry != entry
        assert getattr(updated_entry, attr_name) == new_value
        assert getattr(updated_entry, attr_name) != getattr(entry, attr_name)

        entry = updated_entry


async def test_disabled_by(registry):
    """Test that we can disable an entry when we create it."""
    entry = registry.async_get_or_create("light", "hue", "5678", disabled_by="hass")
    assert entry.disabled_by == "hass"

    entry = registry.async_get_or_create(
        "light", "hue", "5678", disabled_by="integration"
    )
    assert entry.disabled_by == "hass"

    entry2 = registry.async_get_or_create("light", "hue", "1234")
    assert entry2.disabled_by is None
