import logging
import uuid

from certbot import interfaces, errors
from certbot.plugins import dns_common

from . import gandi_api

logger = logging.getLogger(__name__)


def register_authenticator(cls):
    interfaces.Authenticator.register(cls)
    return cls


@register_authenticator
class Authenticator(dns_common.DNSAuthenticator):
    """DNS Authenticator for Gandi (using LiveDNS)."""

    description = (
        "Obtain certificates using a DNS TXT record (if you are using Gandi for DNS)."
    )

    def __init__(self, config, name, **kwargs):
        super(Authenticator, self).__init__(config, name, **kwargs)
        self.credentials = None

    @classmethod
    def add_parser_arguments(cls, add):  # pylint: disable=arguments-differ
        super(Authenticator, cls).add_parser_arguments(add)
        add("credentials", help="Gandi credentials INI file.")

    def more_info(self):  # pylint: disable=missing-docstring,no-self-use
        return "This plugin configures a DNS TXT record to respond to a dns-01 challenge using the Gandi LiveDNS API."

    def _validate_sharing_id(self, credentials):
        sharing_id = credentials.conf("sharing-id")
        if sharing_id:
            try:
                uuid.UUID(sharing_id, version=4)
            except ValueError:
                raise errors.PluginError(f"Invalid sharing_id: {sharing_id}.")

    def _validate(self, credentials):
        self._validate_sharing_id(credentials)

        # Either token must be set
        if not credentials.conf("token"):
            raise errors.PluginError(
                "Missing property in credentials configuration file {0}: {1}".format(
                    credentials.confobj.filename,
                    "dns_gandi_token must be set",
                )
            )

    def _setup_credentials(self):
        self.credentials = self._configure_credentials(
            "credentials", "Gandi credentials INI file", {}, self._validate
        )

    def _perform(self, domain, validation_name, validation):
        error = gandi_api.add_txt_record(
            self._get_gandi_config(), domain, validation_name, validation
        )
        if error is not None:
            raise errors.PluginError(
                f"An error occurred adding the DNS TXT record: {error}"
            )

    def _cleanup(self, domain, validation_name, validation):
        error = gandi_api.del_txt_record(
            self._get_gandi_config(), domain, validation_name, validation
        )
        if error is not None:
            logger.warning("Unable to find or delete the DNS TXT record: %s", error)

    def _get_gandi_config(self):
        return gandi_api.get_config(
            sharing_id=self.credentials.conf("sharing-id"),
            personal_access_token=self.credentials.conf("token"),
        )
