import os
from django.contrib.admin.widgets import AdminFileWidget
from django.utils.safestring import mark_safe
from django.conf import settings


def thumbnail(image_path):
    absolute_url = os.path.join(settings.IMAGES_URL, image_path[7:])
    print(absolute_url)
    return '<img style="max-width: 400px" src="%s" alt="%s" />' % (absolute_url, image_path)


class AdminImageWidget(AdminFileWidget):
    """
    A FileField Widget that displays an image instead of a file path
    if the current file is an image.
    """
    def render(self, name, value, attrs=None):
        output = []
        file_name = str(value)
        if file_name:
            file_path = '%s' % (file_name)
            output.append('<a target="_blank" href="%s">%s</a>' % (file_path, thumbnail(file_name)))

        output.append(super(AdminFileWidget, self).render(name, value, attrs))
        return mark_safe(''.join(output))