import mimetypes
from django.db import models
from django.conf import settings
from django.template.defaultfilters import slugify


class FileUpload(models.Model):
    upload_date = models.DateTimeField(auto_now_add=True)
    upload = models.FileField(upload_to="uploads")
    title = models.CharField(blank=False, max_length=100)
    description = models.CharField(blank=True, max_length=200)
    content_type = models.CharField(editable=False, max_length=100)
    sub_type = models.CharField(editable=False, max_length=100)

    class Meta:
        ordering = ["upload_date", "title"]

    def __unicode__(self):
        return self.title

    def mime_type(self):
        return "%s/%s" % (self.content_type, self.sub_type)

    def type_slug(self):
        return slugify(self.sub_type)

    def is_image(self):
        if self.content_type == "image":
            return True
        else:
            return False

    def get_absolute_url(self):
        return "%s%s" % (settings.MEDIA_URL, self.upload)

    def save(self):
        file_path = "%s%s" % (settings.MEDIA_ROOT, self.upload)
        (mime_type, encoding) = mimetypes.guess_type(file_path)
        try:
            [self.content_type, self.sub_type] = mime_type.split("/")
        except:
            self.content_type = "text"
            self.sub_type = "plain"
        super(FileUpload, self).save()
