"""Support to trigger Maker IFTTT recipes."""
import json
import logging

import requests
import voluptuous as vol

from homeassistant.const import CONF_WEBHOOK_ID
from homeassistant.helpers import config_entry_flow
import homeassistant.helpers.config_validation as cv
from .const import DOMAIN

_LOGGER = logging.getLogger(__name__)

EVENT_RECEIVED = 'ifttt_webhook_received'

ATTR_EVENT = 'event'
ATTR_TARGET = 'target'
ATTR_VALUE1 = 'value1'
ATTR_VALUE2 = 'value2'
ATTR_VALUE3 = 'value3'

CONF_KEY = 'key'

SERVICE_TRIGGER = 'trigger'

SERVICE_TRIGGER_SCHEMA = vol.Schema({
    vol.Required(ATTR_EVENT): cv.string,
    vol.Optional(ATTR_TARGET): vol.All(cv.ensure_list, [cv.string]),
    vol.Optional(ATTR_VALUE1): cv.string,
    vol.Optional(ATTR_VALUE2): cv.string,
    vol.Optional(ATTR_VALUE3): cv.string,
})

CONFIG_SCHEMA = vol.Schema({
    vol.Optional(DOMAIN): vol.Schema({
        vol.Required(CONF_KEY): vol.Any({cv.string: cv.string}, cv.string),
    }),
}, extra=vol.ALLOW_EXTRA)


async def async_setup(hass, config):
    """Set up the IFTTT service component."""
    if DOMAIN not in config:
        return True

    api_keys = config[DOMAIN][CONF_KEY]
    if isinstance(api_keys, str):
        api_keys = {"default": api_keys}

    def trigger_service(call):
        """Handle IFTTT trigger service calls."""
        event = call.data[ATTR_EVENT]
        targets = call.data.get(ATTR_TARGET, list(api_keys))
        value1 = call.data.get(ATTR_VALUE1)
        value2 = call.data.get(ATTR_VALUE2)
        value3 = call.data.get(ATTR_VALUE3)

        target_keys = dict()
        for target in targets:
            if target not in api_keys:
                _LOGGER.error("No IFTTT api key for %s", target)
                continue
            target_keys[target] = api_keys[target]

        try:
            import pyfttt
            for target, key in target_keys.items():
                res = pyfttt.send_event(key, event, value1, value2, value3)
                if res.status_code != 200:
                    _LOGGER.error("IFTTT reported error sending event to %s.",
                                  target)
        except requests.exceptions.RequestException:
            _LOGGER.exception("Error communicating with IFTTT")

    hass.services.async_register(DOMAIN, SERVICE_TRIGGER, trigger_service,
                                 schema=SERVICE_TRIGGER_SCHEMA)

    return True


async def handle_webhook(hass, webhook_id, request):
    """Handle webhook callback."""
    body = await request.text()
    try:
        data = json.loads(body) if body else {}
    except ValueError:
        return None

    if isinstance(data, dict):
        data['webhook_id'] = webhook_id
    hass.bus.async_fire(EVENT_RECEIVED, data)


async def async_setup_entry(hass, entry):
    """Configure based on config entry."""
    hass.components.webhook.async_register(
        DOMAIN, 'IFTTT', entry.data[CONF_WEBHOOK_ID], handle_webhook)
    return True


async def async_unload_entry(hass, entry):
    """Unload a config entry."""
    hass.components.webhook.async_unregister(entry.data[CONF_WEBHOOK_ID])
    return True


# pylint: disable=invalid-name
async_remove_entry = config_entry_flow.webhook_async_remove_entry
