# -*- coding: utf-8 -*-

from django.contrib import admin
from django import forms
from django.forms import widgets
from reversion.admin import VersionAdmin
from solo.admin import SingletonModelAdmin
from ckeditor_uploader.widgets import CKEditorUploadingWidget
from django.db.models import Count
from django.db import models
from django.utils.safestring import mark_safe
from django.core.urlresolvers import reverse

from django.contrib.auth.models import User

from seminar.models import Skola, Resitel, Rocnik, Cislo, Problem, Reseni, PrilohaReseni, Nastaveni, Soustredeni, Soustredeni_Ucastnici, Soustredeni_Organizatori, Novinky, Organizator, Pohadka, Konfera, Uloha
from autocomplete_light import shortcuts as autocomplete_light


class UserModelChoiceField(forms.ModelChoiceField):
	u"""Vlastní ModelChoiceField pro uživatele. Zobrazí kromě loginu i jméno.
	"""
	def label_from_instance(self, obj):
		return u"{} ({})".format(obj.get_full_name(), obj.username)

def get_form_predvypln_autora(self, request, obj=None, *args, **kwargs):
	u"""get_form fce pro Adminy. Předvyplňí přihlášeného uživatele jako autora.
	"""
	form = super(self.__class__, self).get_form(request, *args, **kwargs)
	form.base_fields['autor'].initial = request.user.id
	return form


def make_set_action(atribut, hodnota, nazev):
	u"""
	Pomocnik pro rychle vytvareni hromadnych admin akci ktere jen nastavuji
	atribut (dany jako string) na danou hodnotu.
	nazev je krátký popis akce pro admin rozhraní."""
	def action_f(modeladmin, request, queryset):
		for obj in queryset:
			assert atribut in obj.__dict__
			obj.__setattr__(atribut, hodnota)
			obj.save()
	action_f.short_description = nazev
	# Trik: je potřeba, aby se funkce různě (ale libovolně) jmenovaly,
	# jinak je Django v seznamu akcí splácne do jedné
	action_f.__name__ = 'action_f_%d_%d_%d' % (id(atribut), id(hodnota), id(nazev), )
	return action_f


### Globální nastavení

admin.site.register(Nastaveni, SingletonModelAdmin)


### UTILS (pro verbose_name a help_text)

def field_labels(model, fieldname):
	f = [i for i in model._meta.fields if i.name == fieldname][0]
	return {'label': f.verbose_name.capitalize(), 'help_text': f.help_text, }

def create_modeladmin(modeladmin, model, name = None, verbose_name = None, verbose_name_plural = None):
	
	class Meta:
		proxy = True
		app_label = model._meta.app_label
	Meta.verbose_name = verbose_name
	Meta.verbose_name_plural = verbose_name_plural

	attrs = {'__module__': '', 'Meta': Meta}
	newmodel = type(name, (model,), attrs)
	admin.site.register(newmodel, modeladmin)
	return modeladmin

### INLINES

class ResitelInline(admin.TabularInline):
	model = Resitel
	fields = ['osoba_jmeno', 'osoba_prijmeni', 'skola', 'osoba_mesto', 'rok_maturity', ]
	readonly_fields = ['osoba_jmeno', 'osoba_prijmeni', 'skola', 'osoba_mesto', 'rok_maturity', ]
	extra = 0
	view_on_site = False

	def osoba_jmeno(self, obj):
		return obj.osoba.jmeno

	def osoba_prijmeni(self, obj):
		return obj.osoba.prijmeni

	def osoba_mesto(self, obj):
		return obj.osoba.mesto

	def has_add_permission(self, req): return False


class CisloInline(admin.TabularInline):
	model = Cislo
	fields = ['cislo',
			'datum_vydani', 'datum_deadline', 'datum_deadline_soustredeni',
			'verejne_db', 'poznamka']
	readonly_fields = ['cislo']
	extra = 0
	formfield_overrides = {
		models.TextField: {'widget': forms.TextInput},
	}
	view_on_site = Cislo.verejne_url

	def has_add_permission(self, req): return False


class PrilohaReseniInline(admin.StackedInline):
	model = PrilohaReseni
	fields = ['vytvoreno', 'soubor', 'poznamka']
	readonly_fields = ['vytvoreno']
	formfield_overrides = {
		models.TextField: {'widget': forms.TextInput},
	}
	view_on_site = False

	extra = 0


class ProblemInline(admin.TabularInline):
	model = Problem
	fields = ['kod', 'nazev', 'autor', 'garant', 'opravovatele', 'stav']
	formfield_overrides = {
		models.TextField: {'widget': forms.TextInput},
	}
	view_on_site = Problem.verejne_url

	extra = 0


class ReseniKProblemuInline(admin.TabularInline):
	form = autocomplete_light.modelform_factory(Reseni, autocomplete_fields=['resitele'], fields=['resitele'])
	model = Reseni
	fields = ['resitele', 'forma', 'body', 'cislo_body', 'timestamp', 'poznamka']
	readonly_fields = ['timestamp']
	extra = 0
	formfield_overrides = {
		models.TextField: {'widget': forms.TextInput},
	}
	view_on_site = False

	def get_queryset(self, request):
		qs = super(ReseniKProblemuInline, self).get_queryset(request)
		return qs.select_related('problem', 'cislo_body', 'resitele')

	# Potenciální DB HOG (cislo_body se dotazovalo na cisla pri kazdem zobrazeni jejich selectu ...)
	def formfield_for_dbfield(self, db_field, **kwargs):
		formfield = super(ReseniKProblemuInline, self).formfield_for_dbfield(db_field, **kwargs)
		if db_field.name == 'cislo_body':
			# dirty trick so queryset is evaluated and cached in .choices
			formfield.choices = formfield.choices
		return formfield


class ReseniKResiteliInline(admin.TabularInline):
	model = Reseni
	fields = ['problem', 'forma', 'body', 'cislo_body', 'timestamp', 'poznamka']
	readonly_fields = ['cas_doruceni', 'problem']
	extra = 0
	formfield_overrides = {
		models.TextField: {'widget': forms.TextInput},
	}
	view_on_site = False

	def has_add_permission(self, req): return False

	def get_queryset(self, request):
		qs = super(ReseniKResiteliInline, self).get_queryset(request)
		return qs.select_related('problem', 'cislo_body', 'resitel')

	# Potenciální DB HOG (cislo_body se dotazovalo na cisla pri kazdem zobrazeni jejich selectu ...)
	def formfield_for_dbfield(self, db_field, **kwargs):
		formfield = super(ReseniKResiteliInline, self).formfield_for_dbfield(db_field, **kwargs)
		if db_field.name == 'cislo_body':
			# dirty trick so queryset is evaluated and cached in .choices
			formfield.choices = formfield.choices
		return formfield


class Soustredeni_UcastniciInline(admin.TabularInline):
	form = autocomplete_light.modelform_factory(Soustredeni_Ucastnici, autocomplete_fields=['resitel'], fields=['resitel'])
	model = Soustredeni_Ucastnici
	fields = ['resitel', 'poznamka', ]
	extra = 0
	formfield_overrides = {
		models.TextField: {'widget': forms.TextInput},
	}

	def get_queryset(self, request):
		qs = super(Soustredeni_UcastniciInline, self).get_queryset(request)
		return qs.select_related('resitel', 'soustredeni')


class Soustredeni_OrganizatoriInline(admin.TabularInline):
	form = autocomplete_light.modelform_factory(Soustredeni_Organizatori, autocomplete_fields=['organizator'], fields=['organizator'],)
	model = Soustredeni_Organizatori
	fields = ['organizator', 'poznamka', ]
	extra = 0
	formfield_overrides = {
		models.TextField: {'widget': forms.TextInput},
	}

	def get_queryset(self, request):
		qs = super(Soustredeni_OrganizatoriInline, self).get_queryset(request)
		return qs.select_related('organizator', 'soustredeni')

### Resitel

class ResitelAdmin(VersionAdmin):
	form = autocomplete_light.modelform_factory(Resitel, autocomplete_fields=['skola'], fields=['skola'])
	fk_name = 'osoba'
	fieldsets = [
		(None,              {'fields': ['jmeno', 'prijmeni', 'user']}),
		(u'Škola',          {'fields': ['skola', 'rok_maturity']}),
		(u'Seminář',        {'fields': ['datum_souhlasu_udaje', 'datum_souhlasu_zasilani', 'datum_prihlaseni', 'zasilat']}),
		(u'Osobní údaje',   {'fields': ['pohlavi_muz', 'datum_narozeni', 'email', 'telefon']}),
		(u'Adresa',         {'fields': ['ulice', 'mesto', 'psc', 'stat']}),
		]
	list_display = ['osoba__jmeno', 'osoba__prijmeni', 'osoba__user', 'osoba__pohlavi_muz', 'skola', 'rok_maturity', 'pocet_reseni']
	list_filter = ['osoba__pohlavi_muz', 'rok_maturity', 'zasilat']
	search_fields = ['osoba__jmeno', 'osoba__prijmeni', 'osoba__ulice', 'osoba__mesto', 'osoba__email']
#	inlines = [ReseniKResiteliInline]	# FIXME:
	view_on_site = False

	def osoba__jmeno(self, obj):
		return obj.osoba.jmeno
	
	def osoba__prijmeni(self, obj):
		return obj.osoba.prijmeni
	
	def osoba__user(self, obj):
		return obj.osoba.user

	def osoba__pohlavi_muz(self, obj):
		return obj.osoba.pohlavi_muz

	def osoba__ulice(self, obj):
		return obj.osoba.ulice

	def osoba__mesto(self, obj):
		return obj.osoba.mesto

	def osoba__email(self, obj):
		return obj.osoba.email

	def get_queryset(self, request):
		qs = super(ResitelAdmin, self).get_queryset(request)
		return qs.select_related('skola', 'user').annotate(pocet_reseni=Count('reseni'))

	def pocet_reseni(self, obj):
		return obj.pocet_reseni


admin.site.register(Resitel, ResitelAdmin)


### Skola

class SkolaAdmin(VersionAdmin):
	fieldsets = [
		(None,              {'fields': ['nazev', 'kratky_nazev', 'je_zs', 'je_ss']}),
		(u'Interní ID',     {'fields': ['aesop_id', 'izo'], 'classes': ['collapse']}),
		(u'Adresa',         {'fields': ['ulice', 'mesto', 'psc', 'stat']}),
		(None,              {'fields': ['poznamka']}),
		]
	list_display = ['nazev', 'aesop_id', 'mesto', 'ulice', 'stat', 'je_zs', 'je_ss']
	list_filter = ['stat', 'je_zs', 'je_ss']
	search_fields = ['nazev', 'mesto', 'ulice']
	inlines = [ResitelInline]
	view_on_site = False

admin.site.register(Skola, SkolaAdmin)


### Cislo

class CisloAdmin(VersionAdmin):
	fieldsets = [
		(None, {
			'fields': [
				'cislo',
				'rocnik',
				'verejne_db',
				'verejna_vysledkovka',
				'faze',
				'poznamka',
				'pdf'
			]
		}),
		('Data', {'fields': ['datum_vydani', 'datum_deadline',
							'datum_deadline_soustredeni']}),
		]
	list_display = [
		'kod',
		'rocnik',
		'cislo',
		'datum_vydani',
		'datum_deadline',
		'verejne',
		'verejna_vysledkovka'
	]
	list_filter = ['rocnik']
	view_on_site = Cislo.verejne_url
	actions = [
			make_set_action('verejne_db', True, 'Zveřejnit číslo'),
			make_set_action('verejne_db', False, 'Skrýt (zneveřejnit) číslo'),
			make_set_action('verejna_vysledkovka', True, 'Zveřejnit výsledkovku'),
			make_set_action('verejna_vysledkovka', False, 'Skrýt (zneveřejnit) výsledkovku'),
			]
	#inlines = [ProblemInline]

	def get_queryset(self, request):
		qs = super(CisloAdmin, self).get_queryset(request)
		return qs.select_related('rocnik')

admin.site.register(Cislo, CisloAdmin)

### Rocnik

class RocnikAdmin(VersionAdmin):
	fieldsets = [
		(None,              {'fields': ['rocnik', 'prvni_rok', 'exportovat']}),
		]
	list_display = ['rocnik', 'prvni_rok', 'exportovat', 'verejne']
	inlines = [CisloInline]
	view_on_site = Rocnik.verejne_url
	actions = [
			make_set_action('exportovat', True, u'Nastavit pro AESOP export'),
			make_set_action('exportovat', False, u'Skrýt pro AESOP export'),
			]

admin.site.register(Rocnik, RocnikAdmin)


### PrilohaReseni
# NOTE: Nemá pravděpodobně smysl používat
# class PrilohaReseniAdmin(reversion.VersionAdmin):
#	 readonly_fields = ['timestamp', 'reseni']
#	 fieldsets = [
#		 (None,              {'fields': ['reseni', 'soubor', 'timestamp']}),
#		 (u'Poznámky',       {'fields': ['poznamka']}),
#		 ]
#	 list_display = ['reseni', 'soubor', 'timestamp']
#	 list_filter = ['reseni', 'timestamp']
#	 search_fields = []
# 
# admin.site.register(PrilohaReseni, PrilohaReseniAdmin)


### Reseni

class ReseniAdmin(VersionAdmin):
	#form = autocomplete_light.modelform_factory(Reseni, autocomplete_fields=['problem', 'resitele'], fields=['problem', 'resitele'])
	fieldsets = [
		(None,              {'fields': ['problem__set', 'resitele__set', 'forma', 'cas_doruceni']}),
		(u'Poznámky',       {'fields': ['poznamka']}),
		]
	readonly_fields = ['cas_doruceni']
	list_display = [ResitelInline, 'forma', 'cas_doruceni']
	list_filter = ['cas_doruceni', 'forma']
	search_fields = []
	inlines = [PrilohaReseniInline] # FIXME: odmazáno ProblemInline,ResitelInline
	view_on_site = False

	def get_queryset(self, request):
		qs = super(ReseniAdmin, self).get_queryset(request)
		return qs.select_related('resitele', 'problem', 'cislo_body')

admin.site.register(Reseni, ReseniAdmin)


### Pohádka

class PohadkaAdminForm(forms.ModelForm):
	class Meta:
		model = Pohadka
		exclude = []
	autor = UserModelChoiceField(User.objects.filter(is_staff=True))
	uloha = forms.ModelChoiceField(
		Uloha.objects.all()
	)

	def __init__(self, *args, **kwargs):
		super(PohadkaAdminForm, self).__init__(*args, **kwargs)
		instance = getattr(self, 'instance', None)

		# viz ProblemAdminForm.__init__
		if instance and instance.pk:
			if instance.uloha and instance.uloha.cislo_zadani:
				if instance.uloha.cislo_zadani.faze != 'admin':
					self.fields['text'].widget.attrs['readonly'] = True


class PohadkaAdmin(VersionAdmin):
	form = PohadkaAdminForm
	view_on_site = False

	def get_kod_ulohy(self, obj):
		return obj.uloha.kod_v_rocniku()
	get_kod_ulohy.short_description = u'Kód úlohy'

	def get_rocnik(self, obj):
		return obj.uloha.cislo_zadani.rocnik.rocnik
	get_rocnik.short_description = u'Ročník'

	list_display = [
		'__str__',
		'get_rocnik',
		'get_kod_ulohy',
#		'uloha',
		'autor'
	]

	get_form = get_form_predvypln_autora

class PohadkaKProblemuInline(admin.TabularInline):
	form = PohadkaAdminForm
	model = Pohadka
	exclude = []
	extra = 0

admin.site.register(Pohadka, PohadkaAdmin)


### Problem

from autocomplete_light.contrib.taggit_field import TaggitField, TaggitWidget


class ProblemAdminForm(forms.ModelForm):
	#text_zadani = forms.CharField(widget=CKEditorUploadingWidget(), required=False, **field_labels(Problem, 'text_zadani'))
	#text_reseni = forms.CharField(widget=CKEditorUploadingWidget(), required=False, **field_labels(Problem, 'text_reseni'))
	#text_org = forms.CharField(widget=CKEditorUploadingWidget(), required=False, **field_labels(Problem, 'text_org'))
	zamereni = TaggitField(widget=TaggitWidget('TagAutocomplete'), required=False)
	autor = UserModelChoiceField(User.objects.filter(is_staff=True))
	opravovatel = UserModelChoiceField(User.objects.filter(is_staff=True), required=False)
	class Meta:
		model = Problem
		exclude = ['nadproblem']

	def __init__(self, *args, **kwargs):
		super(ProblemAdminForm, self).__init__(*args, **kwargs)
		instance = getattr(self, 'instance', None)

		# Nedovol měnit název a zadání resp. řešení, pokud je cislo_zadani
		# resp. cislo_reseni mimo fázi admin.
		#
		# Nastavení readonly fields sice vypadá lépe (nevygeneruje input tag),
		# ale při ukládání změny vypíše admin nespecifikovanou chybu, která je
		# způsobena zřejmě tím, že se neodešle žádná hodnota pro povinné pole
		# nazev. Navíc by se smazalo nepovinné pole zadání.
		#
		# Toto řešení je z http://stackoverflow.com/a/325038/4786205.
		#
		# TODO Django 1.9: použít field s atributem disabled?
		if instance and instance.pk:
			if instance.cislo_zadani and instance.cislo_zadani.faze != 'admin':
				# CKEditor neumí readonly ...
				self.fields['text_zadani'] = forms.CharField(
					widget=forms.Textarea,
					required=False
				)
				for f in ['nazev', 'text_zadani', 'body']:
					self.fields[f].widget.attrs['readonly'] = True
			if instance.cislo_reseni and instance.cislo_reseni.faze != 'admin':
				self.fields['text_reseni'] = forms.CharField(
					widget=forms.Textarea,
					required=False
				)
				self.fields['text_reseni'].widget.attrs['readonly'] = True


class ProblemAdmin(VersionAdmin):
	form = ProblemAdminForm
	fieldsets = [
		(None,              {'fields': ['nazev', 'typ', 'stav', 'autor', 'zamereni', 'body', 'timestamp', 'import_dakos_id']}),
		(u'Vydání',         {'fields': ['kod', 'cislo_reseni', 'opravovatel',]}),
		(None,              {'fields': ['text_zadani', 'text_reseni', 'text_org',]}),
		]
	list_select_related = True
	search_fields = ['nazev', 'text_zadani', 'text_reseni', 'text_org']
	view_on_site = Problem.verejne_url
	ordering = ['-timestamp']

	readonly_fields = ['timestamp', 'import_dakos_id']

	def get_queryset(self, request):
		qs = super(ProblemAdmin, self).get_queryset(request)
		return qs.select_related('autor', 'opravovatel', 'cislo_reseni')

	def pocet_reseni(self, obj):
		return obj.pocet_reseni

class ProblemNavrhAdmin(ProblemAdmin):
	list_display = ['nazev', 'typ', 'stav', 'autor', 'timestamp']
	list_filter = ['typ', 'zamereni', 'timestamp', 'stav']

	def get_queryset(self, request):
		qs = super(ProblemNavrhAdmin, self).get_queryset(request)
		return qs.filter(stav__in=[Problem.STAV_NAVRH, Problem.STAV_SMAZANY])

	get_form = get_form_predvypln_autora


#FIXME
#create_modeladmin(ProblemNavrhAdmin, Problem, 'ProblemNavrh', verbose_name=u'Problém (návrh)', verbose_name_plural=u'Problémy (návrhy)')


class ProblemZadanyAdmin(ProblemAdmin):
	list_display = [
		'nazev',
		'typ',
		'cislo_zadani_link',
		'cislo_reseni_link',
		'autor',
		'opravovatel',
		'kod',
		'verejne'
	]
	list_filter = [
		'typ', 'zamereni', 'cislo_zadani__cislo', 'cislo_zadani__rocnik'
	]

	def cislo_zadani_link(self, obj):
		if not obj.cislo_zadani:
			return ""
		return mark_safe('<a href="{}">{}</a>'.format(
			reverse("admin:seminar_cislo_change", args=(obj.cislo_zadani.pk,)),
			obj.cislo_zadani
		))
	cislo_zadani_link.short_description = u'Číslo zadání'

	# TODO pokud se budou odkazy v adminu více používat, možná by se hodilo je
	# nějak zjednodušit, např. tímto?
	# https://github.com/gitaarik/django-admin-relation-links
	def cislo_reseni_link(self, obj):
		if not obj.cislo_reseni:
			return ""
		return mark_safe('<a href="{}">{}</a>'.format(
			reverse("admin:seminar_cislo_change", args=(obj.cislo_reseni.pk,)),
			obj.cislo_reseni
		))
	cislo_reseni_link.short_description = u'Číslo řešení'

	def get_inline_instances(self, request, obj=None):
		if obj and obj.typ == Problem.TYP_ULOHA:
			inlines = [ReseniKProblemuInline, PohadkaKProblemuInline]
		else:
			inlines = [ReseniKProblemuInline]

		return [inline(self.model, self.admin_site) for inline in inlines]

	def get_queryset(self, request):
		qs = super(ProblemZadanyAdmin, self).get_queryset(request)
		return qs.filter(stav=Problem.STAV_ZADANY)

	get_form = get_form_predvypln_autora

#FIXME
#create_modeladmin(ProblemZadanyAdmin, Problem, 'ProblemZadany', verbose_name=u'Problém (zadaný)', verbose_name_plural=u'Problémy (zadané)')

#admin.site.register(Problem, ProblemAdmin)

### Prispevek (k tematkum)

#class PrispevekAdminForm(forms.ModelForm):
#	text_org = forms.CharField(widget=CKEditorUploadingWidget(), required=False,
#			**field_labels(Prispevek, 'text_org'))
#	text_resitel = forms.CharField(widget=CKEditorUploadingWidget(), required=False,
#			**field_labels(Prispevek, 'text_resitel'))
#
#	class Meta:
#		model = Prispevek
#		exclude = []
#
#class PrispevekAdmin(VersionAdmin):
#	form = PrispevekAdminForm
#	list_display = ['nazev', 'problem', 'reseni', 'zverejnit']
#
#admin.site.register(Prispevek, PrispevekAdmin)

### Soustredeni

class SoustredeniAdminForm(forms.ModelForm):
	text = forms.CharField(widget=CKEditorUploadingWidget(), required=False, **field_labels(Soustredeni, 'text'))
	class Meta:
		model = Soustredeni
		exclude = []

class SoustredeniAdmin(VersionAdmin):
	form = SoustredeniAdminForm
	fieldsets = [
		(None, {'fields': ['rocnik', 'misto', 'typ', 'verejne_db', 'exportovat', 'text']}),
		('Data', {'fields': ['datum_zacatku', 'datum_konce']}),
		]
	list_display = ['rocnik', 'misto', 'datum_zacatku', 'typ', 'exportovat', 'verejne']
	inlines = [Soustredeni_UcastniciInline, Soustredeni_OrganizatoriInline]
	list_filter = ['typ', 'rocnik']
	view_on_site = Soustredeni.verejne_url
	actions = [
			make_set_action('verejne_db', True, u'Zveřejnit soustředění'),
			make_set_action('verejne_db', False, u'Skrýt (zneveřejnit) soustředění'),
			make_set_action('exportovat', True, u'Nastavit pro AESOP export'),
			make_set_action('exportovat', False, u'Skrýt pro AESOP export'),
			]

admin.site.register(Soustredeni, SoustredeniAdmin)

### Konfery
class KonferaAdminForm(forms.ModelForm):
	class Meta:
		model=Konfera
		exclude = []

class KonferaAdmin(VersionAdmin):
	form = KonferaAdminForm
	list_filter = ['soustredeni']
	list_display = ['nazev','soustredeni','organizator','typ_prezentace']
#	inlines = [Konfera_UcastniciInline]

admin.site.register(Konfera,KonferaAdmin)

### Novinky

class NovinkyAdminForm(forms.ModelForm):
	text = forms.CharField(widget=CKEditorUploadingWidget(), required=False,
			**field_labels(Novinky, 'text'))
	autor = UserModelChoiceField(User.objects.filter(is_staff=True))

	class Meta:
		model = Novinky
		exclude = []

def zverejnit_novinky(modeladmin, request, queryset):
	''' zverejni vybrane novinky '''
	for novinka in queryset:
		novinka.zverejneno = True
		novinka.save()
	zverejnit_novinky.short_description = 'Zveřejnit vybané novinky'

def zneverejnit_novinky(modeladmin, request, queryset):
	''' zneverejni vybrane novinky'''
	for novinka in queryset:
		novinka.zverejneno = False
		novinka.save()
	zneverejnit_novinky.short_description = 'Zneveřejnit vybrané novinky'


class NovinkyAdmin(VersionAdmin):
	form = NovinkyAdminForm
	list_display = ['datum', 'autor', 'text', 'zverejneno', 'obrazek']
	actions = [zverejnit_novinky, zneverejnit_novinky]

	get_form = get_form_predvypln_autora


admin.site.register(Novinky, NovinkyAdmin)

### Organizator

def jmeno_organizatora(obj):
	''' vraci jmeno organizatora '''
	jmeno = obj.user.first_name
	if obj.prezdivka:
		jmeno = jmeno + ' "' + obj.prezdivka + '"'
	jmeno = jmeno + ' ' + obj.user.last_name
	if jmeno == ' ': # zobrazeni bezejmennych orgu
		return 'org'
	return jmeno
jmeno_organizatora.short_description = 'Jméno organizátora'

def je_organizator_aktivni(obj):
	''' zjisti, zda-li je organizator aktivni '''
	return obj.user.is_active
je_organizator_aktivni.short_description = 'Aktivní'
je_organizator_aktivni.boolean = True

def zaktivovat_organizatory(modeladmin, request, queryset):
	''' vybrane organizatory oznaci jako aktivni '''
	for org in queryset:
		org.user.is_active = True
		org.user.save()
zaktivovat_organizatory.short_description = 'Zaktivovat organizátory'

def deaktivovat_organizatory(modeladmin, request, queryset):
	''' deaktivuje vybrane organizatory '''
	for org in queryset:
		org.user.is_active = False
		org.user.save()
deaktivovat_organizatory.short_description = 'Deaktivovat organizátory'


@admin.register(Organizator)
class OrganizatorAdmin(VersionAdmin):
	list_filter = ['organizuje_do']
	list_display = [jmeno_organizatora, je_organizator_aktivni,]
	actions = [zaktivovat_organizatory, deaktivovat_organizatory,]