""" Use modules.py for Messages sent to JavaScript Callback function """

def login_success_response(user, next_to='/chat/'):
    rooms = ChatRoom.objects.all()
    ctx = {
        'status': 'ok',
        'user_status': 'Active',
        'next_to': next_to,
        'Message': MESSAGE['Login Successful'],
        'user': {'id': user.id, 'name': user.fullname, 'username': user.username},
        'html': render_to_string('chat.html',
                                 {'id': user.id, 'name': user.fullname,'username': user.username, 'rooms': rooms}
                                 )}
    return JsonResponse(ctx, content_type='application/json')


def login_response(user=None, Message=''):
        if Message == 'Login Successful':
            return login_success_response (user)

        if Message == 'Account Inactive':
            ctx = {
                'user': {'id': user.id, 'name': user.fullname, 'username': user.username},
                'status': 'ok',
                'user_status': 'Inactive',
                'Message': MESSAGE['Account Inactive']
            }
            return JsonResponse (ctx, content_type='application/json')

        if Message == 'Incorrect Login':
            ctx = {
                'status': 'ok',
                'user_status': 'Invalid',
                'Message': MESSAGE['Incorrect Login']
            }
            return JsonResponse (ctx, content_type='application/json')

        if Message == 'Already Logged in':
            ctx = {'Message': Message}
            return JsonResponse (ctx, content_type='application/json')

        else:
            ctx = {'status': 'ok', 'user_status': 'Something went wrong, Please try later.'}
            return JsonResponse (ctx)


class LoginView(TemplateView):
    template_name = 'Login.html'

    def get(self, request, *args, **kwargs):
        if request.user.is_authenticated():
            return render_to_response('chat.html', context_instance=RequestContext(request))
        else:
            return render_to_string(self.template_name, context_instance=RequestContext(request))

    def post(self, request):
        username = request.POST.get('username')
        password = request.POST.get('password')
        if request.user.is_authenticated():
            return login_response(Message='Already Logged in')
        user = authenticate(username=username, password=password)
        if user is not None:
            if user.is_active:
                request.session.set_expiry(86400)
                login(request, user)

                return login_response(user, Message='Login Successful')
            else:
                return login_response(user, Message='Account Inactive')
        else:
            return login_response (Message='Incorrect Login')

#User logout
def logout(request):
    """
    Removes the authenticated user's ID from the request and flushes their
    session data.
    """
    # Dispatch the signal before the user is logged out so the receivers have a
    # chance to find out *who* logged out.

    if request.method == 'POST':
        user = getattr(request, 'user', None)
        if hasattr(user, 'is_authenticated') and not user.is_authenticated():
            user = None
        user_logged_out.send(sender=user.__class__, request=request, user=user)

        # remember language choice saved to session
        language = request.session.get(LANGUAGE_SESSION_KEY)

        request.session.flush()

        if language is not None:
            request.session[LANGUAGE_SESSION_KEY] = language

        if hasattr(request, 'user'):
            from django.contrib.auth.models import AnonymousUser
            request.user = AnonymousUser()
            ctx = {'status': 'ok', 'user_status': 'Logout', 'Message': MESSAGE['Logged out'], 'next': '/',
                   'html': render_to_string('Login.html')}
        return JsonResponse(ctx)