import os

from django.db import models
from django.utils.deconstruct import deconstructible
from rules.contrib.models import RulesModel

from outbo.apps.core.models import TimestampableDeletableMixin
from outbo.apps.final_photobriefing import rules
from outbo.apps.final_photobriefing.enums import PhotoType


@deconstructible
class FormatFinalPhotoBriefPhotoFilename:
    def __call__(self, instance, filename):
        obj = instance.brief.brief
        return "/".join(
            ("projects", obj.product.project.slug[1:], "final-photobriefing", filename)
        )


class FinalBrief(TimestampableDeletableMixin, RulesModel):
    class Meta:
        rules_permissions = {
            "add": rules.can_create_final_brief,
            "view": rules.can_read_final_brief,
            "change": rules.can_update_final_brief,
            "delete": rules.can_delete_final_brief,
        }

    brief = models.OneToOneField(
        to="photobriefing.Brief",
        on_delete=models.CASCADE,
        related_name="final",
        related_query_name="final",
        primary_key=True,
    )


class FinalBriefPhoto(TimestampableDeletableMixin, RulesModel):
    class Meta:
        rules_permissions = {
            "add": rules.can_create_final_brief_photo,
            "view": rules.can_read_final_brief_photo,
            "change": rules.can_update_final_brief_photo,
            "delete": rules.can_delete_final_brief_photo,
        }

    brief = models.ForeignKey(
        to=FinalBrief,
        on_delete=models.CASCADE,
        related_query_name="photo",
        related_name="photos",
    )
    file = models.FileField(upload_to=FormatFinalPhotoBriefPhotoFilename())
    type = models.CharField(
        max_length=30,
        choices=[(type, type.value) for type in PhotoType],
        default=PhotoType.INVALID,
    )

    @property
    def filename(self):
        return os.path.basename(self.file.name)