import django_tables2 as tables
from django_tables2.utils import A

from .models import Long

from django.utils.html import format_html

from easy_thumbnails.files import get_thumbnailer

from easy_thumbnails.exceptions import InvalidImageFormatError


class ImageColumn(tables.Column):
    def render(self, value):
        obj = value.first()

        if obj is None:
            return format_html('<span>No image<span>')

        image_object = obj.image
        try:
            thumbnailer = get_thumbnailer(image_object)
            return format_html('<img src="/media/{}" />', thumbnailer["exam-list"])
        except InvalidImageFormatError:
            return format_html('<span title="{}">Invalid image url<span>', image_object)


class LongTable(tables.Table):
    edit = tables.LinkColumn('longs:long_update',
                             text='Edit',
                             args=[A('pk')],
                             orderable=False)
    view = tables.LinkColumn('longs:long_detail',
                             text='View',
                             args=[A('pk')],
                             orderable=False)
    clone = tables.LinkColumn('longs:long_clone',
                              text='Clone',
                              args=[A('pk')],
                              orderable=False)
    images = ImageColumn("images", orderable=False)

    class Meta:
        model = Long
        template_name = "django_tables2/bootstrap4.html"
        fields = ("normal", "abnormality", "region", "examination",
                  "laterality", "site", "created_date", "author")
        sequence = ("view", "images")