import logging

from wagtail.admin.edit_handlers import FieldPanel, TabbedInterface, \
    ObjectList
from wagtail.core.models import Page

logger = logging.getLogger(__name__)


class Chapter(Page):
    class Meta:
        verbose_name = 'Kapitel'
        verbose_name_plural = 'Kapitel'

    content_panels = [
        FieldPanel('title', classname="full title"),
    ]

    settings_panels = [
        FieldPanel('slug')
    ]

    edit_handler = TabbedInterface([
        ObjectList(content_panels, heading='Content'),
        ObjectList(settings_panels, heading='Settings'),
    ])

    template = 'generic_page.html'

    parent_page_types = ['book.Module']

    @classmethod
    def get_module_chapters(cls, module):
        return cls.objects.filter(id__in=module.get_child_ids()).live()