#
#   Login/Sign in page
#
def log_in( request ):

	menu_nodes = MenuNode.objects.filter( is_root=True )

	if( request.user.is_authenticated ):
		return HttpResponseRedirect( reverse( "index" ))
	#
	#   Incomming post http request
	#
	if( request.method == 'POST' ):
		#
		#   Hydrate forms
		#
		sign_form = SignInForm( request.POST )
		login_form = LoginForm( request.POST )
		#
		#   SignInForm submit handle
		#
		if( sign_form.is_valid()):
			#
			#   Get securized form's data
			#
			cleaned_data = sign_form.clean()
			#
			#    Display message if user already exist
			#
			if( User.objects.filter( username=cleaned_data.get( 'email' )).filter( is_active = True ).count() != 0 ):
				user = User.objects.get( username=cleaned_data.get( 'email' ))

				return render(request, 'login.html', LayoutBuilder().add_necessary_for_layout(request, {
														'sign_form'			: SignInForm()		,
														'login_form'		: login_form		,
														'already_exist' 	: True				}))
			else:
				#
				# buffering
				#
				email_username = cleaned_data.get( 'email' ).split( '@' )[0]
				parsed_email_username = re.findall( r"[\w]+", email_username )
				#
				# create user
				#
				user = User.objects.create_user(cleaned_data.get('email'), cleaned_data.get('email'), cleaned_data.get('password'))
				UserProfile(django_user = user).save()
				user.first_name = parsed_email_username[0].title()
				#
				#    If look like a real couple of firstname/lastname -> parse as temp values
				#
				if(len(parsed_email_username) > 1):
					user.last_name = ''.join([''.join([i for i in part if not i.isdigit()]) + ' ' for part in parsed_email_username[1:] if len(''.join([i for i in part if not i.isdigit()])) > 0]).strip().title()
				#
				#    Render success sign page
				#
				login( request, authenticate( username = cleaned_data.get( 'email' ), password = cleaned_data.get( 'password' )))
				return HttpResponseRedirect(reverse("index"))
		#
		#   LoginForm submit handle
		#
		elif(login_form.is_valid()):
			cleaned_data = login_form.clean()
			user = authenticate( username = cleaned_data.get( 'email' ), password = cleaned_data.get( 'password' ))
			#print("authenticate result : {0}".format(user))

			if(user != None): 	#LOGIN SUCESS
				cart = Cart.objects.get_or_create(session_key = request.session.session_key)[0]
				login(request, user)
				if(cart.cart_lines.exists()):
					cart.session_key = request.session.session_key
					cart.save()
				return HttpResponseRedirect( reverse( "index" ))
			else:				#LOGIN FAIL
				return render(request, 'login.html', LayoutBuilder().add_necessary_for_layout(request, {
														'sign_form'			: SignInForm()	,
														'login_form'		: login_form	,
														'echec_login' 		: True 			}))
	#
	#    Regular display (display login form + sign in form)
	#
	return render( request, 'login.html', LayoutBuilder().add_necessary_for_layout(request, {
											'sign_form'	: SignInForm()	,
											'login_form': LoginForm()}))