# -*- coding: utf-8 -*-
#
import uuid
from datetime import timedelta

from celery import shared_task, current_task
from django.conf import settings
from django.db.models import Q
from django.utils import timezone
from django.utils.translation import gettext_lazy as _, gettext_noop

from audits.const import ActivityChoices
from common.const.crontab import CRONTAB_AT_AM_TEN, CRONTAB_AT_PM_TWO
from common.utils import get_logger
from ops.celery.decorator import after_app_ready_start, register_as_period_task
from ops.celery.utils import create_or_update_celery_periodic_tasks
from orgs.utils import tmp_to_root_org
from users.notifications import PasswordExpirationReminderMsg
from users.notifications import UserExpirationReminderMsg
from .models import User

logger = get_logger(__file__)


@shared_task(verbose_name=_('Check password expired'))
def check_password_expired():
    users = User.get_nature_users().filter(source=User.Source.local)
    for user in users:
        if not user.is_valid:
            continue
        if not user.password_will_expired:
            continue
        msg = "The user {} password expires in {} days"
        logger.info(msg.format(user, user.password_expired_remain_days))

        PasswordExpirationReminderMsg(user).publish_async()


@shared_task(verbose_name=_('Periodic check password expired'))
@after_app_ready_start
def check_password_expired_periodic():
    tasks = {
        'check_password_expired_periodic': {
            'task': check_password_expired.name,
            'interval': None,
            'crontab': CRONTAB_AT_AM_TEN,
            'enabled': True,
        }
    }
    create_or_update_celery_periodic_tasks(tasks)


@shared_task(verbose_name=_('Check user expired'))
def check_user_expired():
    date_expired_lt = timezone.now() + timezone.timedelta(days=User.DATE_EXPIRED_WARNING_DAYS)
    users = User.get_nature_users() \
        .filter(source=User.Source.local) \
        .filter(date_expired__lt=date_expired_lt)

    for user in users:
        if not user.is_valid:
            continue
        if not user.will_expired:
            continue
        msg = "The user {} will expires in {} days"
        logger.info(msg.format(user, user.expired_remain_days))
        UserExpirationReminderMsg(user).publish_async()


@shared_task(verbose_name=_('Periodic check user expired'))
@after_app_ready_start
def check_user_expired_periodic():
    tasks = {
        'check_user_expired_periodic': {
            'task': check_user_expired.name,
            'interval': None,
            'crontab': CRONTAB_AT_PM_TWO,
            'enabled': True,
        }
    }
    create_or_update_celery_periodic_tasks(tasks)


@shared_task(verbose_name=_('Check unused users'))
@register_as_period_task(crontab=CRONTAB_AT_PM_TWO)
@tmp_to_root_org()
def check_unused_users():
    uncommon_users_ttl = settings.SECURITY_UNCOMMON_USERS_TTL
    if not uncommon_users_ttl or not uncommon_users_ttl.isdigit():
        return

    uncommon_users_ttl = int(uncommon_users_ttl)
    if uncommon_users_ttl <= 0 or uncommon_users_ttl >= 999:
        return

    seconds_to_subtract = uncommon_users_ttl * 24 * 60 * 60
    t = timezone.now() - timedelta(seconds=seconds_to_subtract)
    last_login_q = Q(last_login__lte=t) | (Q(last_login__isnull=True) & Q(date_joined__lte=t))
    api_key_q = Q(date_api_key_last_used__lte=t) | (Q(date_api_key_last_used__isnull=True) & Q(date_joined__lte=t))

    users = User.objects \
        .filter(date_joined__lt=t) \
        .filter(is_active=True) \
        .filter(last_login_q) \
        .filter(api_key_q) \
        .exclude(username='admin')

    if not users:
        return

    print("Some users are not used for a long time, and they will be disabled.")
    resource_ids = []
    for user in users:
        resource_ids.append(user.id)
        print('  - {}'.format(user.name))

    users.update(is_active=False)
    from audits.signal_handlers import create_activities
    if current_task:
        task_id = current_task.request.id
    else:
        task_id = str(uuid.uuid4())
    detail = gettext_noop('The user has not logged in recently and has been disabled.')
    create_activities(resource_ids, detail, task_id, action=ActivityChoices.task, org_id='')