"""The tests the History component."""
# pylint: disable=protected-access,invalid-name
from datetime import timedelta
import unittest
from unittest.mock import patch, sentinel

from homeassistant.setup import setup_component, async_setup_component
import homeassistant.core as ha
import homeassistant.util.dt as dt_util
from homeassistant.components import history, recorder

from tests.common import (
    init_recorder_component, mock_state_change_event, get_test_home_assistant)


class TestComponentHistory(unittest.TestCase):
    """Test History component."""

    def setUp(self):  # pylint: disable=invalid-name
        """Set up things to be run when tests are started."""
        self.hass = get_test_home_assistant()

    def tearDown(self):  # pylint: disable=invalid-name
        """Stop everything that was started."""
        self.hass.stop()

    def init_recorder(self):
        """Initialize the recorder."""
        init_recorder_component(self.hass)
        self.hass.start()
        self.wait_recording_done()

    def wait_recording_done(self):
        """Block till recording is done."""
        self.hass.block_till_done()
        self.hass.data[recorder.DATA_INSTANCE].block_till_done()

    def test_setup(self):
        """Test setup method of history."""
        config = history.CONFIG_SCHEMA({
            # ha.DOMAIN: {},
            history.DOMAIN: {
                history.CONF_INCLUDE: {
                    history.CONF_DOMAINS: ['media_player'],
                    history.CONF_ENTITIES: ['thermostat.test']},
                history.CONF_EXCLUDE: {
                    history.CONF_DOMAINS: ['thermostat'],
                    history.CONF_ENTITIES: ['media_player.test']}}})
        self.init_recorder()
        self.assertTrue(setup_component(self.hass, history.DOMAIN, config))

    def test_get_states(self):
        """Test getting states at a specific point in time."""
        self.init_recorder()
        states = []

        now = dt_util.utcnow()
        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=now):
            for i in range(5):
                state = ha.State(
                    'test.point_in_time_{}'.format(i % 5),
                    "State {}".format(i),
                    {'attribute_test': i})

                mock_state_change_event(self.hass, state)

                states.append(state)

            self.wait_recording_done()

        future = now + timedelta(seconds=1)
        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=future):
            for i in range(5):
                state = ha.State(
                    'test.point_in_time_{}'.format(i % 5),
                    "State {}".format(i),
                    {'attribute_test': i})

                mock_state_change_event(self.hass, state)

            self.wait_recording_done()

        # Get states returns everything before POINT
        for state1, state2 in zip(
                states, sorted(history.get_states(self.hass, future),
                               key=lambda state: state.entity_id)):
            assert state1 == state2

        # Test get_state here because we have a DB setup
        self.assertEqual(
            states[0], history.get_state(self.hass, future,
                                         states[0].entity_id))

    def test_state_changes_during_period(self):
        """Test state change during period."""
        self.init_recorder()
        entity_id = 'media_player.test'

        def set_state(state):
            """Set the state."""
            self.hass.states.set(entity_id, state)
            self.wait_recording_done()
            return self.hass.states.get(entity_id)

        start = dt_util.utcnow()
        point = start + timedelta(seconds=1)
        end = point + timedelta(seconds=1)

        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=start):
            set_state('idle')
            set_state('YouTube')

        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=point):
            states = [
                set_state('idle'),
                set_state('Netflix'),
                set_state('Plex'),
                set_state('YouTube'),
            ]

        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=end):
            set_state('Netflix')
            set_state('Plex')

        hist = history.state_changes_during_period(
            self.hass, start, end, entity_id)

        self.assertEqual(states, hist[entity_id])

    def test_get_last_state_changes(self):
        """Test number of state changes."""
        self.init_recorder()
        entity_id = 'sensor.test'

        def set_state(state):
            """Set the state."""
            self.hass.states.set(entity_id, state)
            self.wait_recording_done()
            return self.hass.states.get(entity_id)

        start = dt_util.utcnow() - timedelta(minutes=2)
        point = start + timedelta(minutes=1)
        point2 = point + timedelta(minutes=1)

        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=start):
            set_state('1')

        states = []
        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=point):
            states.append(set_state('2'))

        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=point2):
            states.append(set_state('3'))

        hist = history.get_last_state_changes(
            self.hass, 2, entity_id)

        self.assertEqual(states, hist[entity_id])

    def test_get_significant_states(self):
        """Test that only significant states are returned.

        We should get back every thermostat change that
        includes an attribute change, but only the state updates for
        media player (attribute changes are not significant and not returned).
        """
        zero, four, states = self.record_states()
        hist = history.get_significant_states(
            self.hass, zero, four, filters=history.Filters())
        assert states == hist

    def test_get_significant_states_with_initial(self):
        """Test that only significant states are returned.

        We should get back every thermostat change that
        includes an attribute change, but only the state updates for
        media player (attribute changes are not significant and not returned).
        """
        zero, four, states = self.record_states()
        one = zero + timedelta(seconds=1)
        one_and_half = zero + timedelta(seconds=1.5)
        for entity_id in states:
            if entity_id == 'media_player.test':
                states[entity_id] = states[entity_id][1:]
            for state in states[entity_id]:
                if state.last_changed == one:
                    state.last_changed = one_and_half

        hist = history.get_significant_states(
            self.hass, one_and_half, four, filters=history.Filters(),
            include_start_time_state=True)
        assert states == hist

    def test_get_significant_states_without_initial(self):
        """Test that only significant states are returned.

        We should get back every thermostat change that
        includes an attribute change, but only the state updates for
        media player (attribute changes are not significant and not returned).
        """
        zero, four, states = self.record_states()
        one = zero + timedelta(seconds=1)
        one_and_half = zero + timedelta(seconds=1.5)
        for entity_id in states:
            states[entity_id] = list(filter(
                lambda s: s.last_changed != one, states[entity_id]))
        del states['media_player.test2']

        hist = history.get_significant_states(
            self.hass, one_and_half, four, filters=history.Filters(),
            include_start_time_state=False)
        assert states == hist

    def test_get_significant_states_entity_id(self):
        """Test that only significant states are returned for one entity."""
        zero, four, states = self.record_states()
        del states['media_player.test2']
        del states['thermostat.test']
        del states['thermostat.test2']
        del states['script.can_cancel_this_one']

        hist = history.get_significant_states(
            self.hass, zero, four, ['media_player.test'],
            filters=history.Filters())
        assert states == hist

    def test_get_significant_states_multiple_entity_ids(self):
        """Test that only significant states are returned for one entity."""
        zero, four, states = self.record_states()
        del states['media_player.test2']
        del states['thermostat.test2']
        del states['script.can_cancel_this_one']

        hist = history.get_significant_states(
            self.hass, zero, four, ['media_player.test', 'thermostat.test'],
            filters=history.Filters())
        assert states == hist

    def test_get_significant_states_exclude_domain(self):
        """Test if significant states are returned when excluding domains.

        We should get back every thermostat change that includes an attribute
        change, but no media player changes.
        """
        zero, four, states = self.record_states()
        del states['media_player.test']
        del states['media_player.test2']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {history.CONF_EXCLUDE: {
                history.CONF_DOMAINS: ['media_player', ]}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_exclude_entity(self):
        """Test if significant states are returned when excluding entities.

        We should get back every thermostat and script changes, but no media
        player changes.
        """
        zero, four, states = self.record_states()
        del states['media_player.test']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {history.CONF_EXCLUDE: {
                history.CONF_ENTITIES: ['media_player.test', ]}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_exclude(self):
        """Test significant states when excluding entities and domains.

        We should not get back every thermostat and media player test changes.
        """
        zero, four, states = self.record_states()
        del states['media_player.test']
        del states['thermostat.test']
        del states['thermostat.test2']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {history.CONF_EXCLUDE: {
                history.CONF_DOMAINS: ['thermostat', ],
                history.CONF_ENTITIES: ['media_player.test', ]}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_exclude_include_entity(self):
        """Test significant states when excluding domains and include entities.

        We should not get back every thermostat and media player test changes.
        """
        zero, four, states = self.record_states()
        del states['media_player.test2']
        del states['thermostat.test']
        del states['thermostat.test2']
        del states['script.can_cancel_this_one']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {
                history.CONF_INCLUDE: {
                    history.CONF_ENTITIES: ['media_player.test',
                                            'thermostat.test']},
                history.CONF_EXCLUDE: {
                    history.CONF_DOMAINS: ['thermostat']}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_include_domain(self):
        """Test if significant states are returned when including domains.

        We should get back every thermostat and script changes, but no media
        player changes.
        """
        zero, four, states = self.record_states()
        del states['media_player.test']
        del states['media_player.test2']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {history.CONF_INCLUDE: {
                history.CONF_DOMAINS: ['thermostat', 'script']}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_include_entity(self):
        """Test if significant states are returned when including entities.

        We should only get back changes of the media_player.test entity.
        """
        zero, four, states = self.record_states()
        del states['media_player.test2']
        del states['thermostat.test']
        del states['thermostat.test2']
        del states['script.can_cancel_this_one']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {history.CONF_INCLUDE: {
                history.CONF_ENTITIES: ['media_player.test']}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_include(self):
        """Test significant states when including domains and entities.

        We should only get back changes of the media_player.test entity and the
        thermostat domain.
        """
        zero, four, states = self.record_states()
        del states['media_player.test2']
        del states['script.can_cancel_this_one']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {history.CONF_INCLUDE: {
                history.CONF_DOMAINS: ['thermostat'],
                history.CONF_ENTITIES: ['media_player.test']}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_include_exclude_domain(self):
        """Test if significant states when excluding and including domains.

        We should not get back any changes since we include only the
        media_player domain but also exclude it.
        """
        zero, four, states = self.record_states()
        del states['media_player.test']
        del states['media_player.test2']
        del states['thermostat.test']
        del states['thermostat.test2']
        del states['script.can_cancel_this_one']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {
                history.CONF_INCLUDE: {
                    history.CONF_DOMAINS: ['media_player']},
                history.CONF_EXCLUDE: {
                    history.CONF_DOMAINS: ['media_player']}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_include_exclude_entity(self):
        """Test if significant states when excluding and including domains.

        We should not get back any changes since we include only
        media_player.test but also exclude it.
        """
        zero, four, states = self.record_states()
        del states['media_player.test']
        del states['media_player.test2']
        del states['thermostat.test']
        del states['thermostat.test2']
        del states['script.can_cancel_this_one']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {
                history.CONF_INCLUDE: {
                    history.CONF_ENTITIES: ['media_player.test']},
                history.CONF_EXCLUDE: {
                    history.CONF_ENTITIES: ['media_player.test']}}})
        self.check_significant_states(zero, four, states, config)

    def test_get_significant_states_include_exclude(self):
        """Test if significant states when in/excluding domains and entities.

        We should only get back changes of the media_player.test2 entity.
        """
        zero, four, states = self.record_states()
        del states['media_player.test']
        del states['thermostat.test']
        del states['thermostat.test2']
        del states['script.can_cancel_this_one']

        config = history.CONFIG_SCHEMA({
            ha.DOMAIN: {},
            history.DOMAIN: {
                history.CONF_INCLUDE: {
                    history.CONF_DOMAINS: ['media_player'],
                    history.CONF_ENTITIES: ['thermostat.test']},
                history.CONF_EXCLUDE: {
                    history.CONF_DOMAINS: ['thermostat'],
                    history.CONF_ENTITIES: ['media_player.test']}}})
        self.check_significant_states(zero, four, states, config)

    def check_significant_states(self, zero, four, states, config):
        """Check if significant states are retrieved."""
        filters = history.Filters()
        exclude = config[history.DOMAIN].get(history.CONF_EXCLUDE)
        if exclude:
            filters.excluded_entities = exclude.get(history.CONF_ENTITIES, [])
            filters.excluded_domains = exclude.get(history.CONF_DOMAINS, [])
        include = config[history.DOMAIN].get(history.CONF_INCLUDE)
        if include:
            filters.included_entities = include.get(history.CONF_ENTITIES, [])
            filters.included_domains = include.get(history.CONF_DOMAINS, [])

        hist = history.get_significant_states(
            self.hass, zero, four, filters=filters)
        assert states == hist

    def record_states(self):
        """Record some test states.

        We inject a bunch of state updates from media player, zone and
        thermostat.
        """
        self.init_recorder()
        mp = 'media_player.test'
        mp2 = 'media_player.test2'
        therm = 'thermostat.test'
        therm2 = 'thermostat.test2'
        zone = 'zone.home'
        script_nc = 'script.cannot_cancel_this_one'
        script_c = 'script.can_cancel_this_one'

        def set_state(entity_id, state, **kwargs):
            """Set the state."""
            self.hass.states.set(entity_id, state, **kwargs)
            self.wait_recording_done()
            return self.hass.states.get(entity_id)

        zero = dt_util.utcnow()
        one = zero + timedelta(seconds=1)
        two = one + timedelta(seconds=1)
        three = two + timedelta(seconds=1)
        four = three + timedelta(seconds=1)

        states = {therm: [], therm2: [], mp: [], mp2: [], script_c: []}
        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=one):
            states[mp].append(
                set_state(mp, 'idle',
                          attributes={'media_title': str(sentinel.mt1)}))
            states[mp].append(
                set_state(mp, 'YouTube',
                          attributes={'media_title': str(sentinel.mt2)}))
            states[mp2].append(
                set_state(mp2, 'YouTube',
                          attributes={'media_title': str(sentinel.mt2)}))
            states[therm].append(
                set_state(therm, 20, attributes={'current_temperature': 19.5}))

        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=two):
            # This state will be skipped only different in time
            set_state(mp, 'YouTube',
                      attributes={'media_title': str(sentinel.mt3)})
            # This state will be skipped because domain blacklisted
            set_state(zone, 'zoning')
            set_state(script_nc, 'off')
            states[script_c].append(
                set_state(script_c, 'off', attributes={'can_cancel': True}))
            states[therm].append(
                set_state(therm, 21, attributes={'current_temperature': 19.8}))
            states[therm2].append(
                set_state(therm2, 20, attributes={'current_temperature': 19}))

        with patch('homeassistant.components.recorder.dt_util.utcnow',
                   return_value=three):
            states[mp].append(
                set_state(mp, 'Netflix',
                          attributes={'media_title': str(sentinel.mt4)}))
            # Attributes changed even though state is the same
            states[therm].append(
                set_state(therm, 21, attributes={'current_temperature': 20}))
            # state will be skipped since entity is hidden
            set_state(therm, 22, attributes={'current_temperature': 21,
                                             'hidden': True})
        return zero, four, states


async def test_fetch_period_api(hass, aiohttp_client):
    """Test the fetch period view for history."""
    await hass.async_add_job(init_recorder_component, hass)
    await async_setup_component(hass, 'history', {})
    await hass.components.recorder.wait_connection_ready()
    await hass.async_add_job(hass.data[recorder.DATA_INSTANCE].block_till_done)
    client = await aiohttp_client(hass.http.app)
    response = await client.get(
        '/api/history/period/{}'.format(dt_util.utcnow().isoformat()))
    assert response.status == 200