from django.apps import apps
from django.dispatch import Signal

from . import emails

event_submitted = Signal(providing_args=['event'])
event_accepted = Signal(providing_args=['event'])
event_publishing = Signal(providing_args=['event'])
event_published = Signal(providing_args=['event'])
event_expired = Signal(providing_args=['event'])


def notify_submitted_event(sender, **kwargs):
    event = kwargs.get('event')
    app_config = apps.get_containing_app_config(__package__)
    if app_config.settings.enable_email_notifications:
        if event.owner.email:
            email = emails.NewEventMail(recipient=event.owner, event=event)
            email.send()


def notify_accepted_event(sender, **kwargs):
    event = kwargs.get('event')
    app_config = apps.get_containing_app_config(__package__)
    if app_config.settings.enable_email_notifications:
        if event.owner.email:
            email = emails.EventAcceptedMail(recipient=event.owner, event=event)
            email.send()


def notify_to_accept_event(sender, **kwargs):
    event = kwargs.get('event')
    app_config = apps.get_containing_app_config(__package__)
    if app_config.settings.enable_email_notifications:
        from .utils import get_users_by_role
        managers = get_users_by_role('manage_all')
        managers += get_users_by_role('manage_{}'.format(event.sport.lower()))
        OneClickAction = app_config.get_model('OneClickAction')
        for user in managers:
            if user.email:
                action = OneClickAction(command='EA')
                action.parameters = '{event},{user}'.format(event=event.id, user=user.id)
                action.save()
                email = emails.EventToAcceptMail(recipient=user, event=event, accept_action=action)
                email.send()


def notify_to_publish_event(sender, **kwargs):
    event = kwargs.get('event')
    app_config = apps.get_containing_app_config(__package__)
    if app_config.settings.enable_email_notifications:
        from .utils import get_users_by_role
        publishers = get_users_by_role('publish_incremental')
        OneClickAction = app_config.get_model('OneClickAction')
        for user in publishers:
            if user.email:
                action = OneClickAction(command='EP')
                action.parameters = '{event},{user}'.format(event=event.id, user=user.id)
                action.save()
                email = emails.EventToPublishMail(recipient=user, event=event, confirm_publication_action=action)
                email.send()