"""Support for the SpaceAPI."""
import logging

import voluptuous as vol

from homeassistant.components.http import HomeAssistantView
from homeassistant.const import (
    ATTR_ENTITY_ID,
    ATTR_ICON,
    ATTR_LATITUDE,
    ATTR_LOCATION,
    ATTR_LONGITUDE,
    ATTR_STATE,
    ATTR_UNIT_OF_MEASUREMENT,
    CONF_ADDRESS,
    CONF_EMAIL,
    CONF_ENTITY_ID,
    CONF_SENSORS,
    CONF_STATE,
    CONF_URL,
)
import homeassistant.core as ha
import homeassistant.helpers.config_validation as cv
import homeassistant.util.dt as dt_util

_LOGGER = logging.getLogger(__name__)

ATTR_ADDRESS = "address"
ATTR_API = "api"
ATTR_CLOSE = "close"
ATTR_CONTACT = "contact"
ATTR_ISSUE_REPORT_CHANNELS = "issue_report_channels"
ATTR_LASTCHANGE = "lastchange"
ATTR_LOGO = "logo"
ATTR_NAME = "name"
ATTR_OPEN = "open"
ATTR_SENSORS = "sensors"
ATTR_SPACE = "space"
ATTR_UNIT = "unit"
ATTR_URL = "url"
ATTR_VALUE = "value"
ATTR_SENSOR_LOCATION = "location"

CONF_CONTACT = "contact"
CONF_HUMIDITY = "humidity"
CONF_ICON_CLOSED = "icon_closed"
CONF_ICON_OPEN = "icon_open"
CONF_ICONS = "icons"
CONF_IRC = "irc"
CONF_ISSUE_REPORT_CHANNELS = "issue_report_channels"
CONF_LOCATION = "location"
CONF_LOGO = "logo"
CONF_MAILING_LIST = "mailing_list"
CONF_PHONE = "phone"
CONF_SPACE = "space"
CONF_TEMPERATURE = "temperature"
CONF_TWITTER = "twitter"

DATA_SPACEAPI = "data_spaceapi"
DOMAIN = "spaceapi"

ISSUE_REPORT_CHANNELS = [CONF_EMAIL, CONF_IRC, CONF_MAILING_LIST, CONF_TWITTER]

SENSOR_TYPES = [CONF_HUMIDITY, CONF_TEMPERATURE]
SPACEAPI_VERSION = 0.13

URL_API_SPACEAPI = "/api/spaceapi"

LOCATION_SCHEMA = vol.Schema({vol.Optional(CONF_ADDRESS): cv.string}, required=True)

CONTACT_SCHEMA = vol.Schema(
    {
        vol.Optional(CONF_EMAIL): cv.string,
        vol.Optional(CONF_IRC): cv.string,
        vol.Optional(CONF_MAILING_LIST): cv.string,
        vol.Optional(CONF_PHONE): cv.string,
        vol.Optional(CONF_TWITTER): cv.string,
    },
    required=False,
)

STATE_SCHEMA = vol.Schema(
    {
        vol.Required(CONF_ENTITY_ID): cv.entity_id,
        vol.Inclusive(CONF_ICON_CLOSED, CONF_ICONS): cv.url,
        vol.Inclusive(CONF_ICON_OPEN, CONF_ICONS): cv.url,
    },
    required=False,
)

SENSOR_SCHEMA = vol.Schema(
    {vol.In(SENSOR_TYPES): [cv.entity_id], cv.string: [cv.entity_id]}
)

CONFIG_SCHEMA = vol.Schema(
    {
        DOMAIN: vol.Schema(
            {
                vol.Required(CONF_CONTACT): CONTACT_SCHEMA,
                vol.Required(CONF_ISSUE_REPORT_CHANNELS): vol.All(
                    cv.ensure_list, [vol.In(ISSUE_REPORT_CHANNELS)]
                ),
                vol.Required(CONF_LOCATION): LOCATION_SCHEMA,
                vol.Required(CONF_LOGO): cv.url,
                vol.Required(CONF_SPACE): cv.string,
                vol.Required(CONF_STATE): STATE_SCHEMA,
                vol.Required(CONF_URL): cv.string,
                vol.Optional(CONF_SENSORS): SENSOR_SCHEMA,
            }
        )
    },
    extra=vol.ALLOW_EXTRA,
)


def setup(hass, config):
    """Register the SpaceAPI with the HTTP interface."""
    hass.data[DATA_SPACEAPI] = config[DOMAIN]
    hass.http.register_view(APISpaceApiView)

    return True


class APISpaceApiView(HomeAssistantView):
    """View to provide details according to the SpaceAPI."""

    url = URL_API_SPACEAPI
    name = "api:spaceapi"

    @staticmethod
    def get_sensor_data(hass, spaceapi, sensor):
        """Get data from a sensor."""
        sensor_state = hass.states.get(sensor)
        if not sensor_state:
            return None
        sensor_data = {ATTR_NAME: sensor_state.name, ATTR_VALUE: sensor_state.state}
        if ATTR_SENSOR_LOCATION in sensor_state.attributes:
            sensor_data[ATTR_LOCATION] = sensor_state.attributes[ATTR_SENSOR_LOCATION]
        else:
            sensor_data[ATTR_LOCATION] = spaceapi[CONF_SPACE]
        # Some sensors don't have a unit of measurement
        if ATTR_UNIT_OF_MEASUREMENT in sensor_state.attributes:
            sensor_data[ATTR_UNIT] = sensor_state.attributes[ATTR_UNIT_OF_MEASUREMENT]
        return sensor_data

    @ha.callback
    def get(self, request):
        """Get SpaceAPI data."""
        hass = request.app["hass"]
        spaceapi = dict(hass.data[DATA_SPACEAPI])
        is_sensors = spaceapi.get("sensors")

        location = {
            ATTR_ADDRESS: spaceapi[ATTR_LOCATION][CONF_ADDRESS],
            ATTR_LATITUDE: hass.config.latitude,
            ATTR_LONGITUDE: hass.config.longitude,
        }

        state_entity = spaceapi["state"][ATTR_ENTITY_ID]
        space_state = hass.states.get(state_entity)

        if space_state is not None:
            state = {
                ATTR_OPEN: space_state.state != "off",
                ATTR_LASTCHANGE: dt_util.as_timestamp(space_state.last_updated),
            }
        else:
            state = {ATTR_OPEN: "null", ATTR_LASTCHANGE: 0}

        try:
            state[ATTR_ICON] = {
                ATTR_OPEN: spaceapi["state"][CONF_ICON_OPEN],
                ATTR_CLOSE: spaceapi["state"][CONF_ICON_CLOSED],
            }
        except KeyError:
            pass

        data = {
            ATTR_API: SPACEAPI_VERSION,
            ATTR_CONTACT: spaceapi[CONF_CONTACT],
            ATTR_ISSUE_REPORT_CHANNELS: spaceapi[CONF_ISSUE_REPORT_CHANNELS],
            ATTR_LOCATION: location,
            ATTR_LOGO: spaceapi[CONF_LOGO],
            ATTR_SPACE: spaceapi[CONF_SPACE],
            ATTR_STATE: state,
            ATTR_URL: spaceapi[CONF_URL],
        }

        if is_sensors is not None:
            sensors = {}
            for sensor_type in is_sensors:
                sensors[sensor_type] = []
                for sensor in spaceapi["sensors"][sensor_type]:
                    sensor_data = self.get_sensor_data(hass, spaceapi, sensor)
                    sensors[sensor_type].append(sensor_data)
            data[ATTR_SENSORS] = sensors

        return self.json(data)