from django.contrib import admin
from django.db import models
from django.forms import widgets

from polymorphic.admin import PolymorphicParentModelAdmin, PolymorphicChildModelAdmin, PolymorphicChildModelFilter

from .models import TreeNode, RocnikNode, CisloNode, MezicisloNode, TemaVCisleNode, UlohaZadaniNode, PohadkaNode, UlohaVzorakNode, TextNode, CastNode, OrgTextNode
from .models import Text, Obrazek

# Polymorfismus pro stromy
# TODO: Inlines podle https://django-polymorphic.readthedocs.io/en/stable/admin.html

@admin.register(TreeNode)
class TreeNodeAdmin(PolymorphicParentModelAdmin):
	base_model = TreeNode
	child_models = [
		RocnikNode,
		CisloNode,
		MezicisloNode,
		TemaVCisleNode,
		UlohaZadaniNode,
		PohadkaNode,
		UlohaVzorakNode,
		TextNode,
		CastNode,
		OrgTextNode,
	]

	actions = ['aktualizuj_nazvy']

	# XXX: nejspíš je to totální DB HOG, nechcete to použít moc často.
	def aktualizuj_nazvy(self, request, queryset):
		newqs = queryset.get_real_instances()
		for tn in newqs:
			tn.aktualizuj_nazev()
			tn.save()
		self.message_user(request, "Názvy aktualizovány.")
	aktualizuj_nazvy.short_description = "Aktualizuj vybraným TreeNodům názvy"

@admin.register(RocnikNode)
class RocnikNodeAdmin(PolymorphicChildModelAdmin):
	base_model = RocnikNode
	show_in_index = True

@admin.register(CisloNode)
class CisloNodeAdmin(PolymorphicChildModelAdmin):
	base_model = CisloNode
	show_in_index = True

@admin.register(MezicisloNode)
class MezicisloNodeAdmin(PolymorphicChildModelAdmin):
	base_model = MezicisloNode
	show_in_index = True

@admin.register(TemaVCisleNode)
class TemaVCisleNodeAdmin(PolymorphicChildModelAdmin):
	base_model = TemaVCisleNode
	show_in_index = True

@admin.register(UlohaZadaniNode)
class UlohaZadaniNodeAdmin(PolymorphicChildModelAdmin):
	base_model = UlohaZadaniNode
	show_in_index = True

@admin.register(PohadkaNode)
class PohadkaNodeAdmin(PolymorphicChildModelAdmin):
	base_model = PohadkaNode
	show_in_index = True

@admin.register(UlohaVzorakNode)
class UlohaVzorakNodeAdmin(PolymorphicChildModelAdmin):
	base_model = UlohaVzorakNode
	show_in_index = True

@admin.register(TextNode)
class TextNodeAdmin(PolymorphicChildModelAdmin):
	base_model = TextNode
	show_in_index = True

@admin.register(CastNode)
class TextNodeAdmin(PolymorphicChildModelAdmin):
	base_model = CastNode
	show_in_index = True
	fields = ('nadpis',)

@admin.register(OrgTextNode)
class TextNodeAdmin(PolymorphicChildModelAdmin):
	base_model = OrgTextNode
	show_in_index = True


class TextAdminInline(admin.TabularInline):
	model = Text
	formfield_overrides = {
		models.TextField: {'widget': widgets.TextInput}
	}
	exclude = ['text_zkraceny_set', 'text_zkraceny']

admin.site.register(Text)
admin.site.register(Obrazek)