import os

from passfinder.common.tasks import crop_model_image
{ % - if cookiecutter.use_celery != "y" %}
from passfinder.utils.files import crop_image
{ % - endif %}


def create_cropped_model_image(sender, instance, created, **kwargs):
    model = sender
    if created:
        if instance.image:
            { % - if cookiecutter.use_celery == "y" %}
            crop_model_image.apply_async(
                kwargs={
                    "pk": instance.pk,
                    "app_label": model._meta.app_label,
                    "model_name": model._meta.model_name,
                },
                countdown=2,
            )
            { % - else - %}
            instance.image_cropped.save(
                instance.image.path.split(".")[0].split("/")[-1] + ".png",
                File(crop_image(instance.image.path, length=250)),
                save=False,
            )
            instance.save(update_fields=["image_cropped"])
            { % - endif %}


def update_cropped_model_image(sender, instance, **kwargs):
    model = sender
    if instance.id:
        previous = model.objects.get(id=instance.id)
        if previous.image != instance.image:
            # delete previous cropped image
            if instance.image_cropped:
                if os.path.isfile(instance.image_cropped.path):
                    os.remove(instance.image_cropped.path)
            # run task to create new cropped image
            if kwargs["update_fields"] != frozenset({"image_cropped"}) and instance:
                if instance.image:
                    { % - if cookiecutter.use_celery == "y" %}
                    crop_model_image.apply_async(
                        kwargs={
                            "pk": instance.pk,
                            "app_label": model._meta.app_label,
                            "model_name": model._meta.model_name,
                        },
                        countdown=2,
                    )
                    { % - else - %}
                    instance.image_cropped.save(
                        instance.image.path.split(".")[0].split("/")[-1] + ".png",
                        File(crop_image(instance.image.path, length=250)),
                        save=False,
                    )
                    instance.save(update_fields=["image_cropped"])
                    { % - endif %}
                else:
                    instance.image_cropped = None


def delete_cropped_model_image(sender, instance, **kwargs):
    if instance.image_cropped:
        if os.path.isfile(instance.image_cropped.path):
            os.remove(instance.image_cropped.path)