#    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.

"""Database v1 Instances action implementations"""

import argparse
from osc_lib.command import command
from osc_lib import exceptions
from osc_lib import utils as osc_utils
import six

from troveclient.i18n import _


def set_attributes_for_print(instances):
    for instance in instances:
        setattr(instance, 'flavor_id', instance.flavor['id'])
        if hasattr(instance, 'volume'):
            setattr(instance, 'size', instance.volume['size'])
        else:
            setattr(instance, 'size', '-')
        if hasattr(instance, 'datastore'):
            if instance.datastore.get('version'):
                setattr(instance, 'datastore_version',
                        instance.datastore['version'])
            setattr(instance, 'datastore', instance.datastore['type'])
    return instances


def set_attributes_for_print_detail(instance):
    info = instance._info.copy()
    info['flavor'] = instance.flavor['id']
    if hasattr(instance, 'volume'):
        info['volume'] = instance.volume['size']
        if 'used' in instance.volume:
            info['volume_used'] = instance.volume['used']
    if hasattr(instance, 'ip'):
        info['ip'] = ', '.join(instance.ip)
    if hasattr(instance, 'datastore'):
        info['datastore'] = instance.datastore['type']
        info['datastore_version'] = instance.datastore['version']
    if hasattr(instance, 'configuration'):
        info['configuration'] = instance.configuration['id']
    if hasattr(instance, 'replica_of'):
        info['replica_of'] = instance.replica_of['id']
    if hasattr(instance, 'replicas'):
        replicas = [replica['id'] for replica in instance.replicas]
        info['replicas'] = ', '.join(replicas)
    if hasattr(instance, 'networks'):
        info['networks'] = instance.networks['name']
        info['networks_id'] = instance.networks['id']
    if hasattr(instance, 'fault'):
        info.pop('fault', None)
        info['fault'] = instance.fault['message']
        info['fault_date'] = instance.fault['created']
        if 'details' in instance.fault and instance.fault['details']:
            info['fault_details'] = instance.fault['details']
    info.pop('links', None)
    return info


class ListDatabaseInstances(command.Lister):

    _description = _("List database instances")
    columns = ['ID', 'Name', 'Datastore', 'Datastore Version', 'Status',
               'Flavor ID', 'Size', 'Region']

    def get_parser(self, prog_name):
        parser = super(ListDatabaseInstances, self).get_parser(prog_name)
        parser.add_argument(
            '--limit',
            dest='limit',
            metavar='<limit>',
            default=None,
            help=_('Limit the number of results displayed.')
        )
        parser.add_argument(
            '--marker',
            dest='marker',
            metavar='<ID>',
            type=str,
            default=None,
            help=_('Begin displaying the results for IDs greater than the'
                   'specified marker. When used with :option:`--limit,` set'
                   'this to the last ID displayed in the previous run.')
        )
        parser.add_argument(
            '--include_clustered', '--include-clustered',
            dest='include_clustered',
            action="store_true",
            default=False,
            help=_("Include instances that are part of a cluster "
                   "(default %(default)s).  --include-clustered may be "
                   "deprecated in the future, retaining just "
                   "--include_clustered.")
        )
        return parser

    def take_action(self, parsed_args):
        db_instances = self.app.client_manager.database.instances
        instances = db_instances.list(limit=parsed_args.limit,
                                      marker=parsed_args.marker,
                                      include_clustered=(parsed_args.
                                                         include_clustered))
        if instances:
            instances = set_attributes_for_print(instances)
            instances = [osc_utils.get_item_properties(i, self.columns)
                         for i in instances]
        return self.columns, instances


class ShowDatabaseInstance(command.ShowOne):
    _description = _("Show instance details")

    def get_parser(self, prog_name):
        parser = super(ShowDatabaseInstance, self).get_parser(prog_name)
        parser.add_argument(
            'instance',
            metavar='<instance>',
            help=_('Instance (name or ID)'),
        )
        return parser

    def take_action(self, parsed_args):
        db_instances = self.app.client_manager.database.instances
        instance = osc_utils.find_resource(db_instances, parsed_args.instance)
        instance = set_attributes_for_print_detail(instance)
        return zip(*sorted(six.iteritems(instance)))


class DeleteDatabaseInstance(command.Command):

    _description = _("Deletes an instance.")

    def get_parser(self, prog_name):
        parser = super(DeleteDatabaseInstance, self).get_parser(prog_name)
        parser.add_argument(
            'instance',
            metavar='<instance>',
            help=_('ID or name of the Instance'),
        )
        return parser

    def take_action(self, parsed_args):
        db_instances = self.app.client_manager.database.instances
        try:
            instance = osc_utils.find_resource(db_instances,
                                               parsed_args.instance)
            db_instances.delete(instance)
        except Exception as e:
            msg = (_("Failed to delete instance %(instance)s: %(e)s")
                   % {'instance': parsed_args.instance, 'e': e})
            raise exceptions.CommandError(msg)


class CreateDatabaseInstance(command.ShowOne):

    _description = _("Creates a new database instance.")

    def get_parser(self, prog_name):
        parser = super(CreateDatabaseInstance, self).get_parser(prog_name)
        parser.add_argument(
            'name',
            metavar='<name>',
            help=_("Name of the instance."),
        )
        parser.add_argument(
            'flavor',
            metavar='<flavor>',
            type=str,
            help=_("A flavor name or ID."),
        )
        parser.add_argument(
            '--size',
            metavar='<size>',
            type=int,
            default=None,
            help=_("Size of the instance disk volume in GB. "
                   "Required when volume support is enabled."),
        )
        parser.add_argument(
            '--volume_type',
            metavar='<volume_type>',
            type=str,
            default=None,
            help=_("Volume type. Optional when volume support is enabled."),
        )
        parser.add_argument(
            '--databases',
            metavar='<database>',
            nargs="+",
            default=[],
            help=_("Optional list of databases."),
        )
        parser.add_argument(
            '--users',
            metavar='<user:password>',
            nargs="+",
            default=[],
            help=_("Optional list of users."),
        )
        parser.add_argument(
            '--backup',
            metavar='<backup>',
            default=None,
            help=_("A backup name or ID."),
        )
        parser.add_argument(
            '--availability_zone',
            metavar='<availability_zone>',
            default=None,
            help=_("The Zone hint to give to Nova."),
        )
        parser.add_argument(
            '--datastore',
            metavar='<datastore>',
            default=None,
            help=_("A datastore name or ID."),
        )
        parser.add_argument(
            '--datastore_version',
            metavar='<datastore_version>',
            default=None,
            help=_("A datastore version name or ID."),
        )
        parser.add_argument(
            '--nic',
            metavar='<net-id=<net-uuid>,v4-fixed-ip=<ip-addr>,'
                    'port-id=<port-uuid>>',
            action='append',
            dest='nics',
            default=[],
            help=_("Create a NIC on the instance. Specify option multiple "
                   "times to create multiple NICs. net-id: attach NIC to "
                   "network with this ID (either port-id or net-id must be "
                   "specified), v4-fixed-ip: IPv4 fixed address for NIC "
                   "(optional), port-id: attach NIC to port with this ID "
                   "(either port-id or net-id must be specified)."),
        )
        parser.add_argument(
            '--configuration',
            metavar='<configuration>',
            default=None,
            help=_("ID of the configuration group to attach to the instance."),
        )
        parser.add_argument(
            '--replica_of',
            metavar='<source_instance>',
            default=None,
            help=_("ID or name of an existing instance to replicate from."),
        )
        parser.add_argument(
            '--replica_count',
            metavar='<count>',
            type=int,
            default=None,
            help=_("Number of replicas to create (defaults to 1 if "
                   "replica_of specified)."),
        )
        parser.add_argument(
            '--module',
            metavar='<module>',
            type=str,
            dest='modules',
            action='append',
            default=[],
            help=_("ID or name of the module to apply.  Specify multiple "
                   "times to apply multiple modules."),
        )
        parser.add_argument(
            '--locality',
            metavar='<policy>',
            default=None,
            choices=['affinity', 'anti-affinity'],
            help=_("Locality policy to use when creating replicas. Choose "
                   "one of %(choices)s."),
        )
        parser.add_argument(
            '--region',
            metavar='<region>',
            type=str,
            default=None,
            help=argparse.SUPPRESS,
        )
        return parser

    def take_action(self, parsed_args):
        database = self.app.client_manager.database
        db_instances = database.instances
        flavor_id = osc_utils.find_resource(database.flavors,
                                            parsed_args.flavor).id
        volume = None
        if parsed_args.size is not None and parsed_args.size <= 0:
            raise exceptions.ValidationError(
                _("Volume size '%s' must be an integer and greater than 0.")
                % parsed_args.size)
        elif parsed_args.size:
            volume = {"size": parsed_args.size,
                      "type": parsed_args.volume_type}
        restore_point = None
        if parsed_args.backup:
            restore_point = {"backupRef": osc_utils.find_resource(
                database.backups, parsed_args.backup).id}
        replica_of = None
        replica_count = parsed_args.replica_count
        if parsed_args.replica_of:
            replica_of = osc_utils.find_resource(
                db_instances, parsed_args.replica_of)
            replica_count = replica_count or 1
        locality = None
        if parsed_args.locality:
            locality = parsed_args.locality
            if replica_of:
                raise exceptions.ValidationError(
                    _('Cannot specify locality when adding replicas '
                      'to existing master.'))
        databases = [{'name': value} for value in parsed_args.databases]
        users = [{'name': n, 'password': p, 'databases': databases} for (n, p)
                 in
                 [z.split(':')[:2] for z in parsed_args.users]]
        nics = []
        for nic_str in parsed_args.nics:
            nic_info = dict([(k, v) for (k, v) in [z.split("=", 1)[:2] for z in
                                                   nic_str.split(",")]])
            # need one or the other, not both, not none (!= ~ XOR)
            if not (bool(nic_info.get('net-id')) != bool(
                    nic_info.get('port-id'))):
                raise exceptions.\
                    ValidationError(_("Invalid NIC argument: %s. Must specify "
                                      "either net-id or port-id but not both. "
                                      "Please refer to help.")
                                    % (_("nic='%s'") % nic_str))
            nics.append(nic_info)
        modules = []
        for module in parsed_args.modules:
            modules.append(osc_utils.find_resource(database.modules,
                                                   module).id)
        instance = db_instances.create(parsed_args.name,
                                       flavor_id,
                                       volume=volume,
                                       databases=databases,
                                       users=users,
                                       restorePoint=restore_point,
                                       availability_zone=(parsed_args.
                                                          availability_zone),
                                       datastore=parsed_args.datastore,
                                       datastore_version=(parsed_args.
                                                          datastore_version),
                                       nics=nics,
                                       configuration=parsed_args.configuration,
                                       replica_of=replica_of,
                                       replica_count=replica_count,
                                       modules=modules,
                                       locality=locality,
                                       region_name=parsed_args.region)
        instance = set_attributes_for_print_detail(instance)
        return zip(*sorted(six.iteritems(instance)))


class ResetDatabaseInstanceStatus(command.Command):

    _description = _("Set the task status of an instance to NONE if the "
                     "instance is in BUILD or ERROR state. Resetting task "
                     "status of an instance in BUILD state will allow "
                     "the instance to be deleted.")

    def get_parser(self, prog_name):
        parser = super(ResetDatabaseInstanceStatus, self).get_parser(prog_name)
        parser.add_argument(
            'instance',
            metavar='<instance>',
            help=_('ID or name of the instance'),
        )
        return parser

    def take_action(self, parsed_args):
        db_instances = self.app.client_manager.database.instances
        instance = osc_utils.find_resource(db_instances,
                                           parsed_args.instance)
        db_instances.reset_status(instance)


class ResizeDatabaseInstanceFlavor(command.Command):

    _description = _("Resize an instance with a new flavor")

    def get_parser(self, prog_name):
        parser = super(ResizeDatabaseInstanceFlavor, self).get_parser(
            prog_name
        )
        parser.add_argument(
            'instance',
            metavar='<instance>',
            type=str,
            help=_('ID or name of the instance')
        )
        parser.add_argument(
            'flavor_id',
            metavar='<flavor_id>',
            type=str,
            help=_('New flavor of the instance')
        )
        return parser

    def take_action(self, parsed_args):
        db_instances = self.app.client_manager.database.instances
        db_flavor = self.app.client_manager.database.flavors
        instance = osc_utils.find_resource(db_instances,
                                           parsed_args.instance)
        flavor = osc_utils.find_resource(db_flavor,
                                         parsed_args.flavor_id)
        db_instances.resize_instance(instance, flavor)