# Copyright 2012 Nebula, Inc.
#
#    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 urllib import parse

from django import urls
from django.utils.text import format_lazy
from django.utils.translation import ugettext_lazy as _
from django.utils.translation import ungettext_lazy

from horizon import tables

from openstack_dashboard import api
from openstack_dashboard.usage import quotas


class DeleteKeyPairs(tables.DeleteAction):
    policy_rules = (("compute", "os_compute_api:os-keypairs:delete"),)
    help_text = _("Removing a key pair can leave OpenStack resources orphaned."
                  " You should not remove a key pair unless you are certain it"
                  " is not being used anywhere.")

    @staticmethod
    def action_present(count):
        return ungettext_lazy(
            u"Delete Key Pair",
            u"Delete Key Pairs",
            count
        )

    @staticmethod
    def action_past(count):
        return ungettext_lazy(
            u"Deleted Key Pair",
            u"Deleted Key Pairs",
            count
        )

    def delete(self, request, obj_id):
        api.nova.keypair_delete(request, parse.unquote(obj_id))


class QuotaKeypairMixin(object):
    def allowed(self, request, datum=None):
        usages = quotas.tenant_quota_usages(request, targets=('key_pairs', ))
        usages.tally('key_pairs', len(self.table.data))
        if usages['key_pairs']['available'] <= 0:
            if "disabled" not in self.classes:
                self.classes = [c for c in self.classes] + ['disabled']
                self.verbose_name = format_lazy(
                    '{verbose_name} {quota_exceeded}',
                    verbose_name=self.verbose_name,
                    quota_exceeded=_("(Quota exceeded)"))
            return False
        else:
            classes = [c for c in self.classes if c != "disabled"]
            self.classes = classes
            return True


class ImportKeyPair(QuotaKeypairMixin, tables.LinkAction):
    name = "import"
    verbose_name = _("Import Public Key")
    url = "horizon:project:key_pairs:import"
    classes = ("ajax-modal",)
    icon = "upload"
    policy_rules = (("compute", "os_compute_api:os-keypairs:create"),)

    def allowed(self, request, keypair=None):
        if super(ImportKeyPair, self).allowed(request, keypair):
            self.verbose_name = _("Import Public Key")
        return True


class CreateLinkNG(QuotaKeypairMixin, tables.LinkAction):
    name = "create-keypair-ng"
    verbose_name = _("Create Key Pair")
    url = "horizon:project:key_pairs:index"
    classes = ("btn-launch",)
    icon = "plus"
    policy_rules = (("compute", "os_compute_api:os-keypairs:create"),)

    def get_default_attrs(self):
        url = urls.reverse(self.url)
        ngclick = "modal.createKeyPair({ successUrl: '%s' })" % url
        self.attrs.update({
            'ng-controller': 'KeypairController as modal',
            'ng-click': ngclick
        })
        return super(CreateLinkNG, self).get_default_attrs()

    def get_link_url(self, datum=None):
        return "javascript:void(0);"

    def allowed(self, request, keypair=None):
        if super(CreateLinkNG, self).allowed(request, keypair):
            self.verbose_name = _("Create Key Pair")
        return True


class KeypairsFilterAction(tables.FilterAction):

    def filter(self, table, keypairs, filter_string):
        """Naive case-insensitive search."""
        query = filter_string.lower()
        return [keypair for keypair in keypairs
                if query in keypair.name.lower()]


class KeyPairsTable(tables.DataTable):
    detail_link = "horizon:project:key_pairs:detail"
    name = tables.Column("name", verbose_name=_("Key Pair Name"),
                         link=detail_link)
    key_type = tables.Column("type", verbose_name=_("Key Pair Type"))
    fingerprint = tables.Column("fingerprint", verbose_name=_("Fingerprint"))

    def get_object_id(self, keypair):
        return parse.quote(keypair.name)

    class Meta(object):
        name = "keypairs"
        verbose_name = _("Key Pairs")
        table_actions = (CreateLinkNG, ImportKeyPair, DeleteKeyPairs,
                         KeypairsFilterAction,)
        row_actions = (DeleteKeyPairs,)
