from django.shortcuts import render
from django.http import HttpResponse
from django.forms import ModelForm
from django.http import Http404

from pruefungsamt.models import *

def show_homepage(request):
	return render(request, 'pruefungsamt_basis.html', {})

def show_dozenten_anzahl(request):
	d = dict(
	    anzahl = Professor.objects.count(),
	)
	return render(request, 'show_dozenten_anzahl.html', d)

def list_vls(request):
	# Zeige Liste aller Vorlesungen an
	vls = Vorlesung.objects.all()
	return render(request, 'vls_list.html', dict(vls=vls) )


def show_vl(request, id):
	# Zeige die Vorlesung mit der id an
	try:
		vl = Vorlesung.objects.get(id=id)
	except Vorlesung.DoesNotExist:
		raise Http404
	return render(request, 'vl.html', dict(vl=vl) )

def list_profs(request):
	# Zeige Liste aller Professoren an
	profs = Professor.objects.all()
	return render(request, 'profs_list.html', dict(profs=profs) )

def show_prof(request, id):
	# Zeige den Professor mit der id an
	try:
		prof = Professor.objects.get(id=id)
	except Professor.DoesNotExist:
		raise Http404
	return render(request, 'prof.html', dict(prof=prof) )


class VorlesungForm(ModelForm):
	class Meta:
		model  = Vorlesung
		fields = ('titel', 'dozent',)
		# exclude = ()