# -*- coding: utf-8 -*-
#

from django.db.models.signals import post_save, post_init
from django.dispatch import receiver
from django.utils.translation import gettext as _

from common.utils import get_logger
from .models import Asset, SystemUser, Cluster
from .tasks import update_assets_hardware_info_util, \
    test_asset_connectability_util, \
    push_system_user_util


logger = get_logger(__file__)


def update_asset_hardware_info_on_created(asset):
    logger.debug("Update asset `{}` hardware info".format(asset))
    update_assets_hardware_info_util.delay([asset])


def test_asset_conn_on_created(asset):
    logger.debug("Test asset `{}` connectability".format(asset))
    test_asset_connectability_util.delay(asset)


def push_cluster_system_users_to_asset(asset):
    if asset.cluster:
        logger.info("Push cluster system user to asset: {}".format(asset))
        task_name = _("Push cluster system users to asset")
        system_users = asset.cluster.systemuser_set.all()
        push_system_user_util.delay(system_users, [asset], task_name)


@receiver(post_save, sender=Asset, dispatch_uid="my_unique_identifier")
def on_asset_created(sender, instance=None, created=False, **kwargs):
    if instance and created:
        logger.info("Asset `{}` create signal received".format(instance))
        update_asset_hardware_info_on_created(instance)
        test_asset_conn_on_created(instance)
        # push_cluster_system_users_to_asset(instance)


# def push_to_cluster_assets_on_system_user_created_or_update(system_user):
#     if not system_user.auto_push:
#         return
#     logger.debug("Push system user `{}` to cluster assets".format(system_user.name))
#     for cluster in system_user.cluster.all():
#         task_name = _("Push system user to cluster assets: {}->{}").format(
#             cluster.name, system_user.name
#         )
#         assets = cluster.assets.all()
#         push_system_user_util.delay([system_user], assets, task_name)


# @receiver(post_save, sender=SystemUser)
# def on_system_user_created_or_updated(sender, instance=None, **kwargs):
#     if instance and instance.auto_push:
#         logger.info("System user `{}` create or update signal received".format(instance))
#         push_to_cluster_assets_on_system_user_created_or_update(instance)
#
#
# @receiver(post_init, sender=Cluster, dispatch_uid="my_unique_identifier")
# def on_cluster_init(sender, instance, **kwargs):
#     instance.__original_assets = tuple(instance.assets.values_list('pk', flat=True))
#     instance.__origin_system_users = tuple(instance.systemuser_set.values_list('pk', flat=True))
#
#
# @receiver(post_save, sender=Cluster, dispatch_uid="my_unique_identifier")
# def on_cluster_assets_changed(sender, instance, **kwargs):
#     assets_origin = instance.__original_assets
#     assets_new = instance.assets.values_list('pk', flat=True)
#     assets_added = set(assets_new) - set(assets_origin)
#     if assets_added:
#         logger.debug("Receive cluster change assets signal")
#         logger.debug("Push cluster `{}` system users to: {}".format(
#             instance, ', '.join([str(asset) for asset in assets_added])
#         ))
#         assets = []
#         for asset_id in assets_added:
#             try:
#                 asset = Asset.objects.get(pk=asset_id)
#             except Asset.DoesNotExist:
#                 continue
#             else:
#                 assets.append(asset)
#         system_users = [s for s in instance.systemuser_set.all() if s.auto_push]
#         task_name = _("Push system user to assets")
#         push_system_user_util.delay(system_users, assets, task_name)
#
#
# @receiver(post_save, sender=Cluster, dispatch_uid="my_unique_identifier2")
# def on_cluster_system_user_changed(sender, instance, **kwargs):
#     system_users_origin = instance.__origin_system_users
#     system_user_new = instance.systemuser_set.values_list('pk', flat=True)
#     system_users_added = set(system_user_new) - set(system_users_origin)
#     if system_users_added:
#         logger.debug("Receive cluster change system users signal")
#         system_users = []
#         for system_user_id in system_users_added:
#             try:
#                 system_user = SystemUser.objects.get(pk=system_user_id)
#             except SystemUser.DoesNotExist:
#                 continue
#             else:
#                 system_users.append(system_user)
#         logger.debug("Push new system users `{}` to cluster `{}` assets".format(
#             ','.join([s.name for s in system_users]), instance
#         ))
#         task_name = _(
#             "Push system user to cluster assets: {}->{}").format(
#              instance.name, ', '.join(s.name for s in system_users)
#         )
        push_system_user_util.delay(system_users, instance.assets.all(), task_name)