"""The tests for the Sun component."""
from datetime import datetime, timedelta
from unittest.mock import patch

from pytest import mark

import homeassistant.components.sun as sun
import homeassistant.core as ha
import homeassistant.util.dt as dt_util
from homeassistant.const import EVENT_STATE_CHANGED
from homeassistant.setup import async_setup_component


async def test_setting_rising(hass):
    """Test retrieving sun setting and rising."""
    utc_now = datetime(2016, 11, 1, 8, 0, 0, tzinfo=dt_util.UTC)
    with patch('homeassistant.helpers.condition.dt_util.utcnow',
               return_value=utc_now):
        await async_setup_component(hass, sun.DOMAIN, {
            sun.DOMAIN: {sun.CONF_ELEVATION: 0}})

    await hass.async_block_till_done()
    state = hass.states.get(sun.ENTITY_ID)

    from astral import Astral

    astral = Astral()
    utc_today = utc_now.date()

    latitude = hass.config.latitude
    longitude = hass.config.longitude

    mod = -1
    while True:
        next_dawn = (astral.dawn_utc(
            utc_today + timedelta(days=mod), latitude, longitude))
        if next_dawn > utc_now:
            break
        mod += 1

    mod = -1
    while True:
        next_dusk = (astral.dusk_utc(
            utc_today + timedelta(days=mod), latitude, longitude))
        if next_dusk > utc_now:
            break
        mod += 1

    mod = -1
    while True:
        next_midnight = (astral.solar_midnight_utc(
            utc_today + timedelta(days=mod), longitude))
        if next_midnight > utc_now:
            break
        mod += 1

    mod = -1
    while True:
        next_noon = (astral.solar_noon_utc(
            utc_today + timedelta(days=mod), longitude))
        if next_noon > utc_now:
            break
        mod += 1

    mod = -1
    while True:
        next_rising = (astral.sunrise_utc(
            utc_today + timedelta(days=mod), latitude, longitude))
        if next_rising > utc_now:
            break
        mod += 1

    mod = -1
    while True:
        next_setting = (astral.sunset_utc(
            utc_today + timedelta(days=mod), latitude, longitude))
        if next_setting > utc_now:
            break
        mod += 1

    assert next_dawn == dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_DAWN])
    assert next_dusk == dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_DUSK])
    assert next_midnight == dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_MIDNIGHT])
    assert next_noon == dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_NOON])
    assert next_rising == dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_RISING])
    assert next_setting == dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_SETTING])


async def test_state_change(hass):
    """Test if the state changes at next setting/rising."""
    now = datetime(2016, 6, 1, 8, 0, 0, tzinfo=dt_util.UTC)
    with patch('homeassistant.helpers.condition.dt_util.utcnow',
               return_value=now):
        await async_setup_component(hass, sun.DOMAIN, {
            sun.DOMAIN: {sun.CONF_ELEVATION: 0}})

    await hass.async_block_till_done()

    test_time = dt_util.parse_datetime(
        hass.states.get(sun.ENTITY_ID)
        .attributes[sun.STATE_ATTR_NEXT_RISING])
    assert test_time is not None

    assert sun.STATE_BELOW_HORIZON == \
        hass.states.get(sun.ENTITY_ID).state

    hass.bus.async_fire(
        ha.EVENT_TIME_CHANGED,
        {ha.ATTR_NOW: test_time + timedelta(seconds=5)})

    await hass.async_block_till_done()

    assert sun.STATE_ABOVE_HORIZON == \
        hass.states.get(sun.ENTITY_ID).state


async def test_norway_in_june(hass):
    """Test location in Norway where the sun doesn't set in summer."""
    hass.config.latitude = 69.6
    hass.config.longitude = 18.8

    june = datetime(2016, 6, 1, tzinfo=dt_util.UTC)

    with patch('homeassistant.helpers.condition.dt_util.utcnow',
               return_value=june):
        assert await async_setup_component(hass, sun.DOMAIN, {
            sun.DOMAIN: {sun.CONF_ELEVATION: 0}})

    state = hass.states.get(sun.ENTITY_ID)
    assert state is not None

    assert dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_RISING]) == \
        datetime(2016, 7, 25, 23, 23, 39, tzinfo=dt_util.UTC)
    assert dt_util.parse_datetime(
        state.attributes[sun.STATE_ATTR_NEXT_SETTING]) == \
        datetime(2016, 7, 26, 22, 19, 1, tzinfo=dt_util.UTC)


@mark.skip
async def test_state_change_count(hass):
    """Count the number of state change events in a location."""
    # Skipped because it's a bit slow. Has been validated with
    # multiple lattitudes and dates
    hass.config.latitude = 10
    hass.config.longitude = 0

    now = datetime(2016, 6, 1, tzinfo=dt_util.UTC)

    with patch(
            'homeassistant.helpers.condition.dt_util.utcnow',
            return_value=now):
        assert await async_setup_component(hass, sun.DOMAIN, {
            sun.DOMAIN: {sun.CONF_ELEVATION: 0}})

    events = []
    @ha.callback
    def state_change_listener(event):
        if event.data.get('entity_id') == 'sun.sun':
            events.append(event)
    hass.bus.async_listen(EVENT_STATE_CHANGED, state_change_listener)
    await hass.async_block_till_done()

    for _ in range(24*60*60):
        now += timedelta(seconds=1)
        hass.bus.async_fire(
            ha.EVENT_TIME_CHANGED,
            {ha.ATTR_NOW: now})
        await hass.async_block_till_done()

    assert len(events) < 721