#    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.

import logging
from operator import xor

from osc_lib.cli import format_columns
from osc_lib.cli import parseractions
from osc_lib.command import command
from osc_lib import exceptions
from osc_lib import utils as oscutils

from manilaclient import api_versions
from manilaclient.common._i18n import _
from manilaclient.common import cliutils


LOG = logging.getLogger(__name__)


class CreateShareNetworkSubnet(command.ShowOne):
    """Create a share network subnet."""
    _description = _("Create a share network subnet")

    def get_parser(self, prog_name):
        parser = super(CreateShareNetworkSubnet, self).get_parser(prog_name)
        parser.add_argument(
            "share_network",
            metavar="<share-network>",
            help=_("Share network name or ID.")
        )
        parser.add_argument(
            "--neutron-net-id",
            metavar="<neutron-net-id>",
            default=None,
            help=_("Neutron network ID. Used to set up network for share "
                   "servers (optional). Should be defined together with "
                   "'--neutron-subnet-id'.")
        )
        parser.add_argument(
            "--neutron-subnet-id",
            metavar="<neutron-subnet-id>",
            default=None,
            help=_("Neutron subnet ID. Used to set up network for share "
                   "servers (optional). Should be defined together with "
                   "'--neutron-net-id' to which this subnet belongs to. ")
        )
        parser.add_argument(
            "--availability-zone",
            metavar="<availability-zone>",
            default=None,
            help=_("Optional availability zone that the subnet is available "
                   "within (Default=None). If None, the subnet will be "
                   "considered as being available across all availability "
                   "zones.")
        )
        parser.add_argument(
            '--check-only',
            default=False,
            action='store_true',
            help=_("Run a dry-run of a share network subnet create. "
                   "Available only for microversion >= 2.70.")
        )
        parser.add_argument(
            '--restart-check',
            default=False,
            action='store_true',
            help=_("Restart a dry-run of a share network subnet create. "
                   "Helpful when check results are stale. "
                   "Available only for microversion >= 2.70.")
        )
        parser.add_argument(
            "--property",
            metavar="<key=value>",
            default={},
            action=parseractions.KeyValueAction,
            help=_("Set a property to this share network subnet "
                   "(repeat option to set multiple properties). "
                   "Available only for microversion >= 2.78."),
        )
        return parser

    def take_action(self, parsed_args):
        share_client = self.app.client_manager.share

        # check and restart check during create is only available from 2.70.
        if (parsed_args.check_only and
                share_client.api_version < api_versions.APIVersion("2.70")):
            raise exceptions.CommandError(
                "Check only can be specified only with manila API "
                "version >= 2.70.")
        if (parsed_args.restart_check and
                share_client.api_version < api_versions.APIVersion("2.70")):
            raise exceptions.CommandError(
                "Restart check can be specified only with manila API "
                "version >= 2.70.")

        if (parsed_args.property and
                share_client.api_version < api_versions.APIVersion("2.78")):
            raise exceptions.CommandError(
                "Property can be specified only with manila API "
                "version >= 2.78.")

        neutron_client = getattr(self.app.client_manager, 'network', None)
        neutron_net_id = parsed_args.neutron_net_id
        neutron_subnet_id = parsed_args.neutron_subnet_id

        if xor(bool(neutron_net_id),
               bool(neutron_subnet_id)):
            raise exceptions.CommandError(
                "Both neutron_net_id and neutron_subnet_id should be "
                "specified. Alternatively, neither of them should be "
                "specified.")

        if neutron_client and neutron_net_id:
            try:
                neutron_net_id = neutron_client.find_network(
                    neutron_net_id,
                    ignore_missing=False).id
            except Exception:
                raise exceptions.CommandError(
                    f"Neutron network '{neutron_net_id}'"
                    f" not found.")

        if neutron_client and neutron_subnet_id:
            try:
                neutron_subnet_id = neutron_client.find_subnet(
                    neutron_subnet_id,
                    ignore_missing=False).id
            except Exception:
                raise exceptions.CommandError(
                    f"Neutron subnet '{neutron_subnet_id}'"
                    f" not found.")

        share_network_id = oscutils.find_resource(
            share_client.share_networks,
            parsed_args.share_network).id

        if parsed_args.check_only or parsed_args.restart_check:

            if parsed_args.property:
                raise exceptions.CommandError(
                    "Property cannot be specified with check operation.")

            subnet_create_check = (
                share_client.share_networks.share_network_subnet_create_check(
                    neutron_net_id=neutron_net_id,
                    neutron_subnet_id=neutron_subnet_id,
                    availability_zone=parsed_args.availability_zone,
                    reset_operation=parsed_args.restart_check,
                    share_network_id=share_network_id)
            )
            subnet_data = subnet_create_check[1]
            if subnet_data:
                if parsed_args.formatter == 'table':
                    for k, v in subnet_data.items():
                        if isinstance(v, dict):
                            capabilities_list = [v]
                            dict_values = cliutils.convert_dict_list_to_string(
                                capabilities_list
                            )
                            subnet_data[k] = dict_values
        else:
            share_network_subnet = share_client.share_network_subnets.create(
                neutron_net_id=neutron_net_id,
                neutron_subnet_id=neutron_subnet_id,
                availability_zone=parsed_args.availability_zone,
                share_network_id=share_network_id,
                metadata=parsed_args.property
            )
            subnet_data = share_network_subnet._info

        return self.dict2columns(subnet_data)


class DeleteShareNetworkSubnet(command.Command):
    """Delete a share network subnet."""
    _description = _("Delete a share network subnet")

    def get_parser(self, prog_name):
        parser = super(DeleteShareNetworkSubnet, self).get_parser(prog_name)
        parser.add_argument(
            "share_network",
            metavar="<share-network>",
            help=_("Share network name or ID.")
        )
        parser.add_argument(
            "share_network_subnet",
            metavar="<share-network-subnet>",
            nargs="+",
            help=_("ID(s) of share network subnet(s) to be deleted.")
        )
        return parser

    def take_action(self, parsed_args):
        share_client = self.app.client_manager.share
        result = 0

        share_network_id = oscutils.find_resource(
            share_client.share_networks,
            parsed_args.share_network).id

        for subnet in parsed_args.share_network_subnet:
            try:
                share_client.share_network_subnets.delete(
                    share_network_id,
                    subnet)

            except Exception as e:
                result += 1
                LOG.error(f"Failed to delete share network subnet with "
                          f"ID {subnet}: {e}")
        if result > 0:
            total = len(parsed_args.share_network_subnet)
            raise exceptions.CommandError(
                f"{result} of {total} share network subnets failed to be "
                f"deleted.")


class ShowShareNetworkSubnet(command.ShowOne):
    """Show share network subnet."""
    _description = _("Show share network subnet")

    def get_parser(self, prog_name):
        parser = super(ShowShareNetworkSubnet, self).get_parser(prog_name)
        parser.add_argument(
            "share_network",
            metavar="<share-network>",
            help=_("Share network name or ID.")
        )
        parser.add_argument(
            "share_network_subnet",
            metavar="<share-network-subnet>",
            help=_("ID of share network subnet to show.")
        )
        return parser

    def take_action(self, parsed_args):
        share_client = self.app.client_manager.share

        share_network_id = oscutils.find_resource(
            share_client.share_networks,
            parsed_args.share_network).id

        share_network_subnet = share_client.share_network_subnets.get(
            share_network_id,
            parsed_args.share_network_subnet)
        data = share_network_subnet._info

        # Special mapping for columns to make the output easier to read:
        # 'metadata' --> 'properties'
        data.update(
            {
                'properties':
                    format_columns.DictColumn(data.pop('metadata', {})),
            },
        )

        return self.dict2columns(data)


class SetShareNetworkSubnet(command.Command):
    """Set share network subnet properties."""
    _description = _("Set share network subnet properties")

    def get_parser(self, prog_name):
        parser = super(SetShareNetworkSubnet, self).get_parser(prog_name)
        parser.add_argument(
            "share_network",
            metavar="<share-network>",
            help=_("Share network name or ID.")
        )
        parser.add_argument(
            "share_network_subnet",
            metavar="<share-network-subnet>",
            help=_("ID of share network subnet to set a property.")
        )
        parser.add_argument(
            "--property",
            metavar="<key=value>",
            default={},
            action=parseractions.KeyValueAction,
            help=_("Set a property to this share network subnet "
                   "(repeat option to set multiple properties). "
                   "Available only for microversion >= 2.78."),
        )
        return parser

    def take_action(self, parsed_args):
        share_client = self.app.client_manager.share

        if (parsed_args.property and
                share_client.api_version < api_versions.APIVersion("2.78")):
            raise exceptions.CommandError(
                "Property can be specified only with manila API "
                "version >= 2.78.")

        share_network_id = oscutils.find_resource(
            share_client.share_networks,
            parsed_args.share_network).id

        if parsed_args.property:
            try:
                share_client.share_network_subnets.set_metadata(
                    share_network_id, parsed_args.property,
                    subresource=parsed_args.share_network_subnet)
            except Exception as e:
                raise exceptions.CommandError(_(
                    "Failed to set subnet property '%(properties)s': %(e)s") %
                    {'properties': parsed_args.property, 'e': e})


class UnsetShareNetworkSubnet(command.Command):
    """Unset a share network subnet property."""
    _description = _("Unset a share network subnet property")

    def get_parser(self, prog_name):
        parser = super(UnsetShareNetworkSubnet, self).get_parser(prog_name)
        parser.add_argument(
            "share_network",
            metavar="<share-network>",
            help=_("Share network name or ID.")
        )
        parser.add_argument(
            "share_network_subnet",
            metavar="<share-network-subnet>",
            help=_("ID of share network subnet to set a property.")
        )
        parser.add_argument(
            '--property',
            metavar='<key>',
            action='append',
            help=_("Remove a property from share network subnet "
                   "(repeat option to remove multiple properties). "
                   "Available only for microversion >= 2.78."),
        )
        return parser

    def take_action(self, parsed_args):
        share_client = self.app.client_manager.share

        if (parsed_args.property and
                share_client.api_version < api_versions.APIVersion("2.78")):
            raise exceptions.CommandError(
                "Property can be specified only with manila API "
                "version >= 2.78.")

        share_network_id = oscutils.find_resource(
            share_client.share_networks,
            parsed_args.share_network).id

        if parsed_args.property:
            result = 0
            for key in parsed_args.property:
                try:
                    share_client.share_network_subnets.delete_metadata(
                        share_network_id, [key],
                        subresource=parsed_args.share_network_subnet)
                except Exception as e:
                    result += 1
                    LOG.error("Failed to unset subnet property "
                              "'%(key)s': %(e)s", {'key': key, 'e': e})
            if result > 0:
                total = len(parsed_args.property)
                raise exceptions.CommandError(
                    f"{result} of {total} subnet properties failed to be "
                    f"unset.")