from urllib2 import urlparse

from django import http

from django import shortcuts

from django.contrib.auth.decorators import login_required

from django.contrib.auth.models import User

from django.core.context_processors import csrf

from django.core.urlresolvers import reverse

from django.template import loader

from django.template import RequestContext

from django.utils import simplejson as json

from pytask.profile.forms import EditProfileForm

from pytask.profile.utils import get_notification

from pytask.profile.utils import get_user

@login_required

def view_profile(request):

    """ Display the profile information.

    """

    user = request.user

    profile = user.get_profile()

    context = {"user": user,

               "profile": profile,

              }

    return shortcuts.render_to_response("profile/view.html",

                                        RequestContext(request, context))

@login_required

def view_user_profile(request, user_id):

    """ Display the profile information of the user specified in the ID.

    """

    user = shortcuts.get_object_or_404(User, pk=user_id)

    profile = user.get_profile()

    context = {"user": user,

               "profile": profile,

              }

    return shortcuts.render_to_response("profile/view.html",

                                        RequestContext(request, context))

@login_required

def edit_profile(request):

    """ Make only a few fields editable.

    """

    user = request.user

    profile = user.get_profile()

    context = {"user": user,

               "profile": profile,

              }

    context.update(csrf(request))

    if request.method == "POST":

        form = EditProfileForm(request.POST, instance=profile)

        if form.is_valid():

            form.save()

            return shortcuts.redirect(reverse('view_profile'))

        else:

            context.update({"form":form})

            return shortcuts.render_to_response(

              "profile/edit.html", RequestContext(request, context))

    else:

        form = EditProfileForm(instance=profile)

        context.update({"form":form})

        return shortcuts.render_to_response(

          "profile/edit.html", RequestContext(request, context))

@login_required

def browse_notifications(request):

    """ get the list of notifications that are not deleted and display in

    datetime order."""

    user = request.user

    active_notifications = user.notification_sent_to.filter(

      is_deleted=False).order_by('-sent_date')

    context = {'user':user,

               'notifications':active_notifications,

              }                               

    return shortcuts.render_to_response('profile/browse_notifications.html',

                                        RequestContext(request, context))

@login_required

def view_notification(request, notification_id):

    """ get the notification depending on nid.

    Display it.

    """

    user = request.user

    newest, newer, notification, older, oldest = get_notification(

      notification_id, user)

    if not notification:

        raise http.Http404

    notification.is_read = True

    notification.save()

    context = {'user':user,

               'notification':notification,

               'newest':newest,

               'newer':newer,

               'older':older,

               'oldest':oldest,

              }

    return shortcuts.render_to_response(

      'profile/view_notification.html', RequestContext(request, context))

@login_required

def delete_notification(request, notification_id):

    """ check if the user owns the notification and delete it.

    """

    user = request.user

    newest, newer, notification, older, oldest = get_notification(

      notification_id, user)

    if not notification:

        raise http.Http404

    notification.is_deleted = True

    notification.save()

    if older:

        redirect_url = reverse('view_notification',

                               kwargs={'notification_id': older.id})

    else:

        redirect_url = reverse('browse_notifications')

    return shortcuts.redirect(redirect_url)

@login_required

def unread_notification(request, notification_id):

    """ check if the user owns the notification and delete it.

    """

    user = request.user

    newest, newer, notification, older, oldest = get_notification(

      notification_id, user)

    if not notification:

        raise http.Http404

    notification.is_read = False

    notification.save()

    if older:

        redirect_url = reverse('view_notification',

                               kwargs={'notification_id': older.id})

    else:

        redirect_url = reverse('browse_notifications')

    return shortcuts.redirect(redirect_url)

@login_required

def view_user(request, uid):

    user = request.user

    profile = user.get_profile()

    viewing_user = get_user(uid)

    viewing_profile = viewing_user.get_profile()

    working_tasks = viewing_user.approved_tasks.filter(status="Working")

    completed_tasks = viewing_user.approved_tasks.filter(status="Completed")

    reviewing_tasks = viewing_user.reviewing_tasks.all()

    claimed_tasks = viewing_user.claimed_tasks.all()

    can_view_info = True if profile.role in [

      'Administrator', 'Coordinator'] else False

    context = {"user": user,

               "profile": profile,

               "viewing_user": viewing_user,

               "viewing_profile": viewing_profile,

               "working_tasks": working_tasks,

               "completed_tasks": completed_tasks,

               "reviewing_tasks": reviewing_tasks,

               "claimed_tasks": claimed_tasks,

               "can_view_info": can_view_info,

              }

    return shortcuts.render_to_response("profile/view_user.html",

                                        RequestContext(request, context))

@login_required

def login_proceed(request):

    """View that handles the successful login.

    """

    template_name = '_user_login.html'

    # Check if the request came from logout page, if so set

    # authentication to redirect to home page

    referer_path = urlparse.urlsplit(request.META['HTTP_REFERER'])[2]

    if referer_path == reverse('auth_logout'):

      response = {

        'authentication': 'success',

        'redirect': reverse('home_page'),

        }

    elif referer_path == reverse('registration_activation_complete'):

      response = {

        'authentication': 'success',

        'redirect': reverse('view_profile'),

        }

    else:

        response = {

          'authentication': 'success',

          'markup': loader.render_to_string(template_name,

                                            RequestContext(request, {}))

        }

    json_response = json.dumps(response)

    return http.HttpResponse(json_response)