from __future__ import unicode_literals

from django.apps import apps
from django.utils.translation import ugettext_lazy as _

from common import (
    MayanAppConfig, menu_main, menu_object, menu_secondary, menu_tools,
    menu_user
)
from common.widgets import two_state_template
from navigation import SourceColumn
from rest_api.classes import APIEndPoint

from .links import (
    link_events_list, link_event_types_subscriptions_list,
    link_notification_mark_read, link_notification_mark_read_all,
    link_user_notifications_list,
)
from .licenses import *  # NOQA
from .widgets import event_object_link, event_type_link


def event_actor(action):
    return _('System') if action.actor == action.target else action.actor


def event_action_object(action):
    return action.action_object if action.action_object != action.target and action.action_object else ''


class EventsApp(MayanAppConfig):
    has_tests = True
    name = 'events'
    verbose_name = _('Events')

    def ready(self):
        super(EventsApp, self).ready()
        Action = apps.get_model(app_label='actstream', model_name='Action')
        Notification = self.get_model(model_name='Notification')
        StoredEventType = self.get_model(model_name='StoredEventType')

        APIEndPoint(app=self, version_string='1')

        SourceColumn(
            source=Action, label=_('Timestamp'), attribute='timestamp'
        )
        SourceColumn(
            source=Action, label=_('Actor'),
            func=lambda context: event_actor(context['object'])
        )
        SourceColumn(
            source=Action, label=_('Event'),
            func=lambda context: event_type_link(context['object'])
        )
        SourceColumn(
            source=Action, label=_('Action object'),
            func=lambda context: event_object_link(
                entry=context['object'], attribute='action_object'
            )
        )

        SourceColumn(
            source=StoredEventType, label=_('Namespace'), attribute='namespace'
        )
        SourceColumn(
            source=StoredEventType, label=_('Label'), attribute='label'
        )

        SourceColumn(
            source=Notification, label=_('Timestamp'),
            attribute='action.timestamp'
        )
        SourceColumn(
            source=Notification, label=_('Actor'), attribute='action.actor'
        )
        SourceColumn(
            source=Notification, label=_('Event'),
            func=lambda context: event_type_link(context['object'].action)
        )
        SourceColumn(
            source=Notification, label=_('Target'),
            func=lambda context: event_object_link(context['object'].action)
        )
        SourceColumn(
            source=Notification, label=_('Seen'),
            func=lambda context: two_state_template(
                state=context['object'].read
            )
        )

        menu_main.bind_links(
            links=(link_user_notifications_list,), position=99
        )
        menu_object.bind_links(
            links=(link_notification_mark_read,), sources=(Notification,)
        )
        menu_secondary.bind_links(
            links=(link_notification_mark_read_all,),
            sources=('events:user_notifications_list',)
        )
        menu_tools.bind_links(links=(link_events_list,))
        menu_user.bind_links(links=(link_event_types_subscriptions_list,))