from django.db import models
from django.utils.translation import gettext_lazy as _
from sorl import thumbnail
from sorl.thumbnail.fields import ImageField as SORLImageField

from utils.methods import image_path
from utils.models import ProjectBaseMixin, SORLImageMixin, PlatformMixin, BaseAttributes


class ImageQuerySet(models.QuerySet):
    """QuerySet for model Image."""


class Image(BaseAttributes, SORLImageMixin, PlatformMixin):
    """Image model."""
    HORIZONTAL = 0
    VERTICAL = 1

    MEDIA_TYPES = (
        _('photo'),
        _('video'),
        _('youtube'),
    )

    ORIENTATIONS = (
        (HORIZONTAL, _('Horizontal')),
        (VERTICAL, _('Vertical')),
    )

    image = SORLImageField(max_length=255, upload_to=image_path,
                           verbose_name=_('image file'), default=None, null=True)
    orientation = models.PositiveSmallIntegerField(choices=ORIENTATIONS,
                                                   blank=True, null=True, default=None,
                                                   verbose_name=_('image orientation'))
    title = models.CharField(_('title'), max_length=255, default='')
    is_public = models.BooleanField(default=True, verbose_name=_('Is media source public'))

    preview = SORLImageField(max_length=255, upload_to=image_path, verbose_name=_('image preview'), null=True,
                             default=None)
    link = models.URLField(blank=True, null=True, default=None, verbose_name=_('mp4 or youtube video link'))
    order = models.PositiveIntegerField(default=0, verbose_name=_('Sorting order'))
    objects = ImageQuerySet.as_manager()

    class Meta:
        """Meta class."""
        verbose_name = _('Image')
        verbose_name_plural = _('Images')
        ordering = ['-modified']

    def __str__(self):
        """String representation"""
        return f'{self.id}'

    @property
    def type(self) -> str:
        if self.image:
            return self.MEDIA_TYPES[0]
        if self.link is not None and self.link.endswith('.mp4'):
            return self.MEDIA_TYPES[1]
        return self.MEDIA_TYPES[2]

    @property
    def image_size_in_KB(self):
        try:
            return self.image.size / 1024 if self.image else None
        except FileNotFoundError:
            return None

    def delete_image(self, completely: bool = True):
        """
        Deletes an instance and crops of instance from media storage.
        :param completely: if set to False then removed only crop neither original image.
        """
        try:
            # Delete from remote storage
            thumbnail.delete(file_=self.image.file, delete_file=completely)
        except FileNotFoundError:
            pass
        finally:
            if completely:
                # Delete an instance of image
                super().delete()