from __future__ import unicode_literals

from django.apps import apps
from django.contrib.auth import get_user_model
from django.db.models.signals import post_save
from django.utils.translation import ugettext_lazy as _

from mayan.apps.acls import ModelPermission
from mayan.apps.acls.links import link_acl_list
from mayan.apps.acls.permissions import permission_acl_edit, permission_acl_view
from mayan.apps.common import (
    menu_list_facet, menu_multi_item, menu_object, menu_secondary, menu_setup,
    menu_user
)
from mayan.apps.common.apps import MayanAppConfig
from mayan.apps.common.widgets import TwoStateWidget
from mayan.apps.events import ModelEventType
from mayan.apps.events.links import (
    link_events_for_object, link_object_event_types_user_subcriptions_list
)
from mayan.apps.metadata import MetadataLookup
from mayan.apps.navigation import SourceColumn
from mayan.apps.rest_api.fields import DynamicSerializerField

from .events import event_user_edited
from .handlers import handler_initialize_new_user_options
from .links import (
    link_current_user_details, link_current_user_edit, link_group_create,
    link_group_delete, link_group_edit, link_group_list, link_group_members,
    link_group_setup, link_user_create, link_user_delete, link_user_edit,
    link_user_groups, link_user_list, link_user_multiple_delete,
    link_user_multiple_set_password, link_user_set_options,
    link_user_set_password, link_user_setup, text_user_label,
    separator_user_label
)
from .methods import method_get_absolute_url
from .permissions import (
    permission_group_delete, permission_group_edit,
    permission_group_view, permission_user_delete, permission_user_edit,
    permission_user_view
)
from .search import *  # NOQA
from .utils import lookup_get_groups, lookup_get_users


class UserManagementApp(MayanAppConfig):
    app_namespace = 'user_management'
    app_url = 'accounts'
    has_rest_api = True
    has_tests = True
    name = 'mayan.apps.user_management'
    verbose_name = _('User management')

    def ready(self):
        super(UserManagementApp, self).ready()
        from actstream import registry

        Group = apps.get_model(app_label='auth', model_name='Group')
        User = get_user_model()

        DynamicSerializerField.add_serializer(
            klass=get_user_model(),
            serializer_class='mayan.apps.user_management.serializers.UserSerializer'
        )

        MetadataLookup(
            description=_('All the groups.'), name='groups',
            value=lookup_get_groups
        )
        MetadataLookup(
            description=_('All the users.'), name='users',
            value=lookup_get_users
        )

        ModelEventType.register(
            event_types=(event_user_edited,), model=User
        )

        ModelPermission.register(
            model=Group, permissions=(
                permission_acl_edit, permission_acl_view,
                permission_group_delete, permission_group_edit,
                permission_group_view,
            )
        )
        ModelPermission.register(
            model=User, permissions=(
                permission_acl_edit, permission_acl_view,
                permission_user_delete, permission_user_edit,
                permission_user_view
            )
        )

        SourceColumn(
            attribute='name', is_identifier=True, is_sortable=True,
            label=_('Name'), source=Group
        )
        SourceColumn(
            attribute='user_set.count', label=_('Users'), source=Group
        )

        SourceColumn(
            attribute='username', is_absolute_url=True, is_identifier=True,
            is_sortable=True, label=_('Username'), source=User
        )
        SourceColumn(
            attribute='first_name', is_sortable=True, label=_('First name'),
            source=User
        )
        SourceColumn(
            attribute='last_name', is_sortable=True, label=_('Last name'),
            source=User
        )
        SourceColumn(
            attribute='email', is_sortable=True, label=_('Email'), source=User
        )
        SourceColumn(
            attribute='is_active', is_sortable=True, label=_('Active'),
            source=User, widget=TwoStateWidget
        )
        SourceColumn(
            attribute='has_usable_password', label=_('Has usable password?'),
            source=User, widget=TwoStateWidget
        )

        User.add_to_class(
            name='get_absolute_url', value=method_get_absolute_url
        )

        menu_list_facet.bind_links(
            links=(
                link_acl_list, link_events_for_object,
                link_object_event_types_user_subcriptions_list,
                link_group_members,
            ), sources=(Group,)
        )

        menu_list_facet.bind_links(
            links=(
                link_acl_list, link_events_for_object,
                link_object_event_types_user_subcriptions_list,
                link_user_groups,
            ), sources=(User,)
        )

        menu_multi_item.bind_links(
            links=(link_user_multiple_set_password, link_user_multiple_delete),
            sources=('user_management:user_list',)
        )
        menu_object.bind_links(
            links=(link_group_edit,), sources=(Group,)
        )
        menu_object.bind_links(
            links=(link_group_delete,), position=99, sources=(Group,)
        )
        menu_object.bind_links(
            links=(
                link_user_edit, link_user_set_password, link_user_set_options,
                link_user_delete
            ), sources=(User,)
        )
        menu_secondary.bind_links(
            links=(link_group_list, link_group_create), sources=(
                'user_management:group_multiple_delete',
                'user_management:group_list', 'user_management:group_create',
                Group
            )
        )
        menu_secondary.bind_links(
            links=(link_user_list, link_user_create), sources=(
                User, 'user_management:user_multiple_set_password',
                'user_management:user_multiple_delete',
                'user_management:user_list', 'user_management:user_create'
            )
        )
        menu_setup.bind_links(links=(link_user_setup, link_group_setup))
        menu_user.bind_links(
            links=(
                text_user_label, separator_user_label,
                link_current_user_details, link_current_user_edit,
            ), position=0
        )

        post_save.connect(
            dispatch_uid='user_management_handler_initialize_new_user_options',
            receiver=handler_initialize_new_user_options,
            sender=User
        )
        registry.register(Group)
        registry.register(User)