# Copyright 2016 VMware, Inc.
# All Rights Reserved
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.
#

from oslo_utils import excutils
import six

from vmware_nsxlib._i18n import _


class NsxLibException(Exception):
    """Base NsxLib Exception.

    To correctly use this class, inherit from it and define
    a 'message' property. That message will get printf'd
    with the keyword arguments provided to the constructor.
    """
    message = _("An unknown exception occurred.")

    def __init__(self, **kwargs):
        try:
            super(NsxLibException, self).__init__(self.message % kwargs)
            self.msg = self.message % kwargs
        except Exception:
            with excutils.save_and_reraise_exception() as ctxt:
                if not self.use_fatal_exceptions():
                    ctxt.reraise = False
                    # at least get the core message out if something happened
                    super(NsxLibException, self).__init__(self.message)

    if six.PY2:
        def __unicode__(self):
            return unicode(self.msg) if six.PY2 else self.msg  # noqa

    def __str__(self):
        return self.msg

    def use_fatal_exceptions(self):
        return False


class ObjectAlreadyExists(NsxLibException):
    message = _("%(object_type)s already exists")


class ObjectNotGenerated(NsxLibException):
    message = _("%(object_type)s was not generated")


class CertificateError(NsxLibException):
    message = _("Certificate error: %(msg)s")


class NsxLibInvalidInput(NsxLibException):
    message = _("Invalid input for operation: %(error_message)s.")


class ManagerError(NsxLibException):
    message = _("Unexpected error from backend manager (%(manager)s) "
                "for %(operation)s%(details)s")
    related_error_codes = []

    def __init__(self, **kwargs):
        details = kwargs.get('details', '')
        kwargs['details'] = ': %s' % details if details else ''
        super(ManagerError, self).__init__(**kwargs)
        try:
            self.msg = self.message % kwargs
        except KeyError:
            self.msg = details
        self.error_code = kwargs.get('error_code')
        self.related_error_codes = kwargs.get('related_error_codes', [])


class ResourceNotFound(ManagerError):
    message = _("Resource could not be found on backend (%(manager)s) for "
                "%(operation)s")


class BackendResourceNotFound(ResourceNotFound):
    message = _("%(details)s On backend (%(manager)s) with Operation: "
                "%(operation)s")


class InvalidInput(ManagerError):
    message = _("%(operation)s failed: Invalid input %(arg_val)s "
                "for %(arg_name)s")


class StaleRevision(ManagerError):
    pass


class ServerBusy(ManagerError):
    pass


class TooManyRequests(ServerBusy):
    pass


class ServiceUnavailable(ServerBusy):
    pass


class ClientCertificateNotTrusted(ManagerError):
    message = _("Certificate not trusted")


class BadXSRFToken(ManagerError):
    message = _("Bad or expired XSRF token")


class ServiceClusterUnavailable(ManagerError):
    message = _("Service cluster: '%(cluster_id)s' is unavailable. Please, "
                "check NSX setup and/or configuration")


class NSGroupMemberNotFound(ManagerError):
    message = _("Could not find NSGroup %(nsgroup_id)s member %(member_id)s "
                "for removal.")


class NSGroupIsFull(ManagerError):
    message = _("NSGroup %(nsgroup_id)s contains has reached its maximum "
                "capacity, unable to add additional members.")


class NumberOfNsgroupCriteriaTagsReached(ManagerError):
    message = _("Port can be associated with at most %(max_num)s "
                "security-groups.")


class SecurityGroupMaximumCapacityReached(ManagerError):
    message = _("Security Group %(sg_id)s has reached its maximum capacity, "
                "no more ports can be associated with this security-group.")


class NsxSearchInvalidQuery(NsxLibException):
    message = _("Invalid input for NSX search query. Reason: %(reason)s")


class NsxSearchError(NsxLibException):
    message = _("Search failed due to error")


class NsxIndexingInProgress(NsxSearchError):
    message = _("Bad Request due to indexing is in progress, please retry "
                "after sometime")


class NsxSearchTimeout(NsxSearchError):
    message = _("Request timed out. This may occur when system is under load "
                "or running low on resources")


class NsxPendingDelete(NsxLibException):
    message = _("An object with the same name is marked for deletion. Either "
                "use another path or wait for the purge cycle to permanently "
                "remove the deleted object")


class APITransactionAborted(ServerBusy):
    message = _("API transaction aborted as MP cluster is reconfiguring.")
