from __future__ import absolute_import

from django.utils.translation import ugettext_lazy as _
from django.conf import settings
from django.contrib.comments.models import Comment
from django.contrib.contenttypes import generic

from navigation.api import bind_links, register_model_list_columns, Link
from common.utils import encapsulate
from acls.api import class_permissions
from documents.models import Document

if 'django.contrib.comments' not in settings.INSTALLED_APPS:
    raise Exception('This app depends on the django.contrib.comments app.')

from .permissions import (PERMISSION_COMMENT_CREATE,
    PERMISSION_COMMENT_DELETE, PERMISSION_COMMENT_VIEW)

comment_delete = Link(text=_('delete'), view='comment_delete', args='object.pk', sprite='comment_delete', permissions=[PERMISSION_COMMENT_DELETE])
comment_multiple_delete = Link(text=_('delete'), view='comment_multiple_delete', args='object.pk', sprite='comments_delete', permissions=[PERMISSION_COMMENT_DELETE])
comment_add = Link(text=_('add comment'), view='comment_add', args='object.pk', sprite='comment_add', permissions=[PERMISSION_COMMENT_CREATE])
comments_for_document = Link(text=_('comments'), view='comments_for_document', args='object.pk', sprite='comments', permissions=[PERMISSION_COMMENT_VIEW], children_view_regex=['comment'])

register_model_list_columns(Comment, [
    {
        'name': _(u'date'),
        'attribute': 'submit_date'
    },
    {
        'name': _(u'user'),
        'attribute': encapsulate(lambda x: x.user.get_full_name() if x.user.get_full_name() else x.user)
    },
    {
        'name': _(u'comment'),
        'attribute': 'comment'
    }
])

bind_links(['comments_for_document', 'comment_add', 'comment_delete', 'comment_multiple_delete'], [comment_add], menu_name='sidebar')
bind_links([Comment], [comment_delete])
bind_links([Document], [comments_for_document], menu_name='form_header')

Document.add_to_class(
    'comments',
    generic.GenericRelation(
        Comment,
        content_type_field='content_type',
        object_id_field='object_pk'
    )
)

class_permissions(Document, [
    PERMISSION_COMMENT_CREATE,
    PERMISSION_COMMENT_DELETE,
    PERMISSION_COMMENT_VIEW
])