from django.contrib import admin
from django.contrib.contenttypes.models import ContentType


class GenericCollectionInlineModelAdmin(admin.options.InlineModelAdmin):
    ct_field = "content_type"
    ct_fk_field = "object_id"

    def __init__(self, parent_model, admin_site):
        super(GenericCollectionInlineModelAdmin, self).__init__(parent_model, admin_site)
        ctypes = ContentType.objects.all().order_by('id').values_list('id', 'app_label', 'model')
        elements = ["%s: '%s/%s'" % (x, y, z) for x, y, z in ctypes]
        self.content_types = "{%s}" % ",".join(elements)

    def get_formset(self, request, obj=None, **kwargs):
        result = super(GenericCollectionInlineModelAdmin, self).get_formset(request, obj, **kwargs)
        result.content_types = self.content_types
        result.ct_fk_field = self.ct_fk_field
        return result


class GenericCollectionTabularInline(GenericCollectionInlineModelAdmin):
    template = 'admin/edit_inline/gen_coll_tabular.html'


class GenericCollectionStackedInline(GenericCollectionInlineModelAdmin):
    template = 'admin/edit_inline/gen_coll_stacked.html'