from django.contrib.auth.models import (
    Group as DjangoGroup, Permission as DjangoPermission,
)
from django.db import models
from django.utils.crypto import get_random_string
from django.utils.translation import ugettext_lazy as _

from kfet.cms.models import CmsPermissionManager


class GenericTeamTokenManager(models.Manager):

    def create_token(self):
        token = get_random_string(50)
        while self.filter(token=token).exists():
            token = get_random_string(50)
        return self.create(token=token)


class GenericTeamToken(models.Model):
    token = models.CharField(max_length=50, unique=True)

    objects = GenericTeamTokenManager()

    class Meta:
        default_permissions = ()


class Group(DjangoGroup):

    def give_admin_access(self):
        perms = Permission.kfetcore.all()
        self.permissions.add(*perms)

    def give_staff_access(self):
        perms = Permission.kfetcore.filter(
            codename__in=['is_team', 'perform_deposit'])
        self.permissions.add(*perms)

    class Meta:
        verbose_name = _("Groupe")
        verbose_name_plural = _("Groupes")
        default_permissions = ('view', 'add', 'change')


KFET_CORE_APP_LABELS = ['kfet', 'kfetauth']


class CorePermissionManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(
            content_type__app_label__in=KFET_CORE_APP_LABELS)


class Permission(DjangoPermission):
    kfetcore = CorePermissionManager()
    kfetcms = CmsPermissionManager()

    class Meta:
        proxy = True
        verbose_name = _("Permission")
        verbose_name_plural = _("Permissions")