"""Signal Messenger for notify component."""
import logging

from pysignalclirestapi import SignalCliRestApi, SignalCliRestApiError
import voluptuous as vol

from homeassistant.components.notify import (
    ATTR_DATA,
    PLATFORM_SCHEMA,
    BaseNotificationService,
)
import homeassistant.helpers.config_validation as cv

_LOGGER = logging.getLogger(__name__)

CONF_SENDER_NR = "number"
CONF_RECP_NR = "recipients"
CONF_SIGNAL_CLI_REST_API = "url"
ATTR_FILENAME = "attachment"
ATTR_FILENAMES = "attachments"

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
    {
        vol.Required(CONF_SENDER_NR): cv.string,
        vol.Required(CONF_SIGNAL_CLI_REST_API): cv.string,
        vol.Required(CONF_RECP_NR): vol.All(cv.ensure_list, [cv.string]),
    }
)


def get_service(hass, config, discovery_info=None):
    """Get the SignalMessenger notification service."""

    sender_nr = config[CONF_SENDER_NR]
    recp_nrs = config[CONF_RECP_NR]
    signal_cli_rest_api_url = config[CONF_SIGNAL_CLI_REST_API]

    signal_cli_rest_api = SignalCliRestApi(signal_cli_rest_api_url, sender_nr)

    return SignalNotificationService(recp_nrs, signal_cli_rest_api)


class SignalNotificationService(BaseNotificationService):
    """Implement the notification service for SignalMessenger."""

    def __init__(self, recp_nrs, signal_cli_rest_api):
        """Initialize the service."""

        self._recp_nrs = recp_nrs
        self._signal_cli_rest_api = signal_cli_rest_api

    def send_message(self, message="", **kwargs):
        """Send a message to a one or more recipients.

        Additionally a file can be attached.
        """

        _LOGGER.debug("Sending signal message")

        data = kwargs.get(ATTR_DATA)

        filenames = None
        if data is not None:
            if ATTR_FILENAMES in data:
                filenames = data[ATTR_FILENAMES]
            if ATTR_FILENAME in data:
                _LOGGER.warning(
                    "The 'attachment' option is deprecated, please replace it with 'attachments'. This option will become invalid in version 0.108"
                )
                if filenames is None:
                    filenames = [data[ATTR_FILENAME]]
                else:
                    filenames.append(data[ATTR_FILENAME])

        try:
            self._signal_cli_rest_api.send_message(message, self._recp_nrs, filenames)
        except SignalCliRestApiError as ex:
            _LOGGER.error("%s", ex)
            raise ex