from django import template
from enum import Enum
import seminar.models as m

register = template.Library()

@register.filter
def nodeType(value):
	if isinstance(value,RocnikNode): return "Ročník"
	if isinstance(value,CisloNode): return "Číslo"
	if isinstance(value,CastNode): return "Část"
	if isinstance(value,TextNode): return "Text"
	if isinstance(value,TemaVCisleNode): return "Téma v čísle"
	if isinstance(value,KonferaNode): return "Konfera"
	if isinstance(value,ClanekNode): return "Článek"
	if isinstance(value,UlohaVzorakNode): return "Vzorák"
	if isinstance(value,UlohaZadaniNode): return "Zadání úlohy"
	if isinstance(value,PohadkaNode): return "Pohádka"

### NASLEDUJICI FUNKCE SE POUZIVAJI VE views.py V SEKCI PRIPRAVJICI TNLData
### NEMAZAT, PRESUNOUT S TNLDaty NEKAM BOKEM

@register.filter
def isRocnik(value):
	return isinstance(value, m.RocnikNode)

@register.filter
def isCislo(value):
	return isinstance(value, m.CisloNode)

@register.filter
def isCast(value):
	return isinstance(value, m.CastNode)

@register.filter
def isText(value):
	return isinstance(value, m.TextNode)

@register.filter
def isTemaVCisle(value):
	return isinstance(value, m.TemaVCisleNode)

@register.filter
def isKonfera(value):
	return isinstance(value, m.KonferaNode)

@register.filter
def isClanek(value):
	return isinstance(value, m.ClanekNode)

@register.filter
def isUlohaVzorak(value):
	return isinstance(value, m.UlohaVzorakNode)

@register.filter
def isUlohaZadani(value):
	return isinstance(value, m.UlohaZadaniNode)

@register.filter
def isPohadka(value):
	return isinstance(value, m.PohadkaNode)

@register.filter
def isReseni(value):
	return False
#	return isinstance(value, m.OtisteneReseniNode)

@register.filter
def isOrgText(value):
	return False
#	return isinstance(value, m.OrgTextNode)


### 

#@register.filter
#def podvesitelneNody(value):
#	if isText()

@register.filter
def deletable(value):
	if isTemaVCisle(value):
		return True
	if isOrgText(value):
		return True
	if isReseni(value):
		return True
	if isUlohaZadani(value):
		return True
	if isUlohaVzorak(value):
		return True
	if isCast(value):
		return True
	if isText(value):
		return True
	return False

@register.filter
def editableSiblings(value):
	if isCast(value.node):
		return True
	if isText(value.node):
		return True
	if isReseni(value.node) and value.tema_in_path:
		return True
	if isUlohaZadani(value.node) and value.tema_in_path:
		return True
	if isUlohaVzorak(value.node) and value.tema_in_path:
		return True
	return False

@register.filter
def editableChildren(value):
	if isRocnik(value.node):
		return False
	if isCislo(value.node):
		return False
	if isText(value.node):
		return False
	return True

@register.filter
def textOnlySubtree(value):
	text_only = True
	if isText(value.node):
		return True
	if not isCast(value.node):
		return False
	for ch in value.children:
		if not textOnlySubtree(ch):
			return False
	return True

def canPodvesit(obj,new_parent):
	if isCast(new_parent.node):
#		print("Lze",obj,new_parent)
		return True
	if textOnlySubtree(obj):
#		print("Lze",obj,new_parent)
		return True
	return False

@register.filter
def canPodvesitZa(value):
	if not value.index or value.index+1 >= len(value.parent.children):
		return False
	new_parent = value.parent.children[value.index+1]
	return canPodvesit(value,new_parent)

@register.filter
def canPodvesitPred(value):
	if not value.index or value.index <= 0:
		return False
	new_parent = value.parent.children[value.index-1]
	return canPodvesit(value,new_parent)


class NodeTypes(Enum):
	ROCNIK = ('rocnikNode','Ročník')
	CISLO = ('cisloNode', 'Číslo')
	MEZICISLO = ('mezicisloNode', 'Mezičíslo')
	CAST = ('castNode', 'Část')
	TEXT = ('textNode', 'Text')
	TEMAVCISLE = ('temaVCisleNode', 'Téma v čísle')
	RESENI = ('reseniNode','Řešení')
	ULOHAZADANI = ('ulohaZadaniNode','Zadání')
	ULOHAVZORAK = ('ulohaVzorakNode','Vzorák')
	POHADKA = ('pohadkaNode','Pohádka')
	ORGTEXT = ('orgText','Orgtext')




@register.simple_tag
def appendableChildren(value):
	print(value)
	print(value.node)
	print(isUlohaZadani(value.node))
	if isTemaVCisle(value.node):
		return (NodeTypes.RESENI.value[0],
			NodeTypes.ULOHAZADANI.value[0],
			NodeTypes.ULOHAVZORAK.value[0],
			NodeTypes.CAST.value[0],
			NodeTypes.TEXT.value[0],
			)
	if isOrgText(value.node) or isReseni(value.node) or isUlohaZadani(value.node) or isUlohaVzorak(value.node):
		print("Text/Cast")
		return (NodeTypes.CAST.value[0],
			NodeTypes.TEXT.value[0],
			)
	if isCast(value.node):
		return appendableChildren(value.parent)
	return []

@register.simple_tag
def canAppendReseni(value):
	if isTemaVCisle(value.node):
		return True
	if isCast(value.node):
		return canAppendReseni(value.parent)
	return False

@register.simple_tag
def canAppendUlohaZadani(value):
	if isTemaVCisle(value.node):
		return True
	if isCast(value.node):
		return canAppendUlohaZadani(value.parent)
	return False

@register.simple_tag
def canAppendUlohaVzorak(value):
	if isTemaVCisle(value.node):
		return True
	if isCast(value.node):
		return canAppendUlohaVzorak(value.parent)
	return False

@register.simple_tag
def canAppendCast(value):
	if isTemaVCisle(value.node) or isOrgText(value.node) or isReseni(value.node) or isUlohaZadani(value.node) or isUlohaVzorak(value.node):
		return True
	if isCast(value.node):
		return canAppendCast(value.parent)
	return False

@register.simple_tag
def canAppendText(value):
	if isTemaVCisle(value.node) or isOrgText(value.node) or isReseni(value.node) or isUlohaZadani(value.node) or isUlohaVzorak(value.node):
		return True
	if isCast(value.node):
		return canAppendText(value.parent)
	return False

#@register.filter
#def is(value):
#	return
#
#			NodeTypes..value,
#@register.filter
#def is(value):
#	return