from django.db import models
from utils.models import CreatedUpdatedModel
from teams.models import Team

class Type(CreatedUpdatedModel):
    """
    The events.Type model contains different types of system events which can happen.
    New event types should be added in data migrations.
    The following types are currently used in the codebase:
    - ticket_created: Whenever a new ShopTicket is created
    - public_credit_name_changed: Whenever a user changes public_credit_name in the profile
    """
    name = models.TextField(
        unique=True,
        help_text='The type of event'
    )

    irc_notification = models.BooleanField(
        default=False,
        help_text='Check to send IRC notifications for this type of event.',
    )

    email_notification = models.BooleanField(
        default=False,
        help_text='Check to send email notifications for this type of event.',
    )
    def __str__(self):
        return self.name

    @property
    def teams(self):
        """
        This property returns a queryset with all the teams that should receive this type of events
        """
        team_ids = Routing.objects.filter(eventtype=self).values_list('team', flat=True)
        return Team.objects.filter(pk__in=team_ids)


class Routing(CreatedUpdatedModel):
    """
    The events.Routing model contains routings for system events.
    Add a new entry to route events of a certain type to a team.
    Several teams can receive the same type of event.
    """
    eventtype = models.ForeignKey(
        'events.Type',
        related_name='eventroutes',
        on_delete=models.PROTECT,
        help_text='The type of event to route',
    )

    team = models.ForeignKey(
        'teams.Team',
        related_name='eventroutes',
        on_delete=models.PROTECT,
        help_text='The team which should receive events of this type.'
    )

    def __str__(self):
        return "%s -> %s" % (self.eventtype, self.team)