"""
Twilio Call platform for notify component.

For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/notify.twilio_call/
"""
import logging
import urllib

import voluptuous as vol

from homeassistant.components.twilio import DATA_TWILIO
import homeassistant.helpers.config_validation as cv
from homeassistant.components.notify import (
    ATTR_TARGET, PLATFORM_SCHEMA, BaseNotificationService)

_LOGGER = logging.getLogger(__name__)

DEPENDENCIES = ['twilio']

CONF_FROM_NUMBER = 'from_number'

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
    vol.Required(CONF_FROM_NUMBER):
        vol.All(cv.string, vol.Match(r"^\+?[1-9]\d{1,14}$")),
})


def get_service(hass, config, discovery_info=None):
    """Get the Twilio Call notification service."""
    return TwilioCallNotificationService(
        hass.data[DATA_TWILIO], config[CONF_FROM_NUMBER])


class TwilioCallNotificationService(BaseNotificationService):
    """Implement the notification service for the Twilio Call service."""

    def __init__(self, twilio_client, from_number):
        """Initialize the service."""
        self.client = twilio_client
        self.from_number = from_number

    def send_message(self, message="", **kwargs):
        """Call to specified target users."""
        from twilio import TwilioRestException

        targets = kwargs.get(ATTR_TARGET)

        if not targets:
            _LOGGER.info("At least 1 target is required")
            return

        if message.startswith(("http://", "https://")):
            twimlet_url = message
        else:
            twimlet_url = "http://twimlets.com/message?Message="
            twimlet_url += urllib.parse.quote(message, safe="")

        for target in targets:
            try:
                self.client.calls.create(
                    to=target, url=twimlet_url, from_=self.from_number)
            except TwilioRestException as exc:
                _LOGGER.error(exc)
