from django.conf import settings
from django.http import HttpResponseRedirect
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.contrib.auth.decorators import login_required
from django.contrib.auth.views import (logout as auth_logout,
                                       login as auth_login)
from simpleauth.util import clean_next


@login_required
def logout(request, template_name='simpleauth/logged_out.html'):
    """Logout the user from the website and redirect back."""
    next = clean_next(request.GET.get('next'))
    auth_logout(request, next_page=next, template_name=template_name)
    return HttpResponseRedirect(next)


def login(request, template_name='simpleauth/signin.html'):
    """Login the user to the website and redirect back."""
    next = clean_next(request.GET.get('next'))
    # By default keep the user logged in for 3 weeks
    # TODO: Make this an option with a checkbox (#129)
    login_duration = getattr(settings, 'LOGIN_DAYS', 21) * 60 * 60 * 24 
    request.session.set_expiry(login_duration)
    return auth_login(request, template_name=template_name,
                      redirect_field_name='next')


@login_required
def account_settings(request, template_name='simpleauth/settings.html'):
    """Account settings page."""
    msg = request.GET.get('msg', '')
    return render_to_response(template_name,
                  {'msg': msg,},
                  context_instance=RequestContext(request))
