import pam
from django.contrib.auth import authenticate, login
from django.shortcuts import render_to_response
from django import forms as forms
from django.utils.translation import ugettext_lazy as _, ugettext


class LoginForm(forms.Form):
        username = forms.CharField(max_length=100)
        password = forms.CharField(widget=forms.PasswordInput(render_value=False), max_length=100)


def login_view(request):
        def errorHandle(error):
                form = LoginForm()
                return render_to_response('login.html', {
                                'error' : error,
                                'form' : form,
                })
        if request.method == 'POST': # If the form has been submitted...
                form = LoginForm(request.POST) # A form bound to the POST data
                if form.is_valid(): # All validation rules pass
                        username = request.POST['username']
                        password = request.POST['password']
                        user = authenticate(username=username, password=password)
                        if user is not None:
                                if user.is_active:
                                        # Redirect to a success page.
                                        login(request, user)
                                        return render_to_response('logged_in.html', {
                                                'username': username,
                                        })
                                else:
                                        # Return a 'disabled account' error message
                                        error = u'account disabled'
                                        return errorHandle(error)
                        else:
# Return an 'invalid login' error message.
                                error = u'invalid login'
                                return errorHandle(error)
                else:
                        error = u'form is invalid'
                        return errorHandle(error)
        else:
                form = LoginForm() # An unbound form
                return render_to_response('login.html', {
                        'form': form,
                })