from django.db.models.signals import post_save
from django.dispatch import receiver

from apps.tasks.models import Task


@receiver(post_save, sender=Task)
def recalculate_project_on_task_change(sender, instance: Task, **kwargs):
    from apps.projects.models import ProjectStepItem
    from apps.projects.services import refresh_project_status

    item = (
        ProjectStepItem.objects
        .filter(task_id=instance.pk)
        .select_related('step__project')
        .first()
    )
    if item is None:
        return
    item.step.refresh_status(save=True)
    refresh_project_status(item.step.project)