from django.db.models import Sum

from django.http import Http404

from django.shortcuts import render_to_response, redirect

from offline.settings import ADMIN_KEY

from offline.event.models import Event

from offline.event.forms import EventCreateForm, OpenQuizForm

from offline.quiz.models import Quiz, QuestionBank

from offline.quiz.utils import correct_quiz

num2name = {"11" : "Day 1 Quiz 1",

            "12" : "Day 1 Quiz 2",

            "21" : "Day 2 Quiz 1",

           }

def event_home(request):

    """ The page for people to view.

    """

    try:

        event = Event.objects.all()[0]

    except IndexError:

        raise Http404

    ip = request.META['REMOTE_ADDR']

    can_submit_feedback = True if event.feedback_status != '0' and \

            not event.feedback.filter(day=event.feedback_status,user_ip=ip) else False

    can_take_quiz = True if event.quiz_status != "00" else False

    return render_to_response('home.html', {'event':event, 'can_submit_feedback':can_submit_feedback, 'can_take_quiz':can_take_quiz})

def event_admin(request):

    """ see if the key is correct and then display options.

    """

    try:

        event = Event.objects.all()[0]

    except IndexError:

        return redirect('/event/create/%s'%ADMIN_KEY)

    return render_to_response('admin.html', {'event':event, 'admin_key':ADMIN_KEY})

def event_create(request):

    """ Create an event for which the quiz and feedback should be conducted.

    """

    try:

        event = Event.objects.all()[0]

        return redirect("/event/admin/%s"%admin_key)

    except IndexError:

        new_event = Event()

    if request.method == "POST":

        form = EventCreateForm(request.POST)

        if form.is_valid():

            new_event.title = form.cleaned_data['title']

            new_event.start_date = form.cleaned_data['start_date']

            new_event.stop_date = form.cleaned_data['stop_date']

            new_event.save()

            return redirect('/event/admin/%s'%ADMIN_KEY)

        else:

            return render_to_response('create_event.html',{'form':form})

    else:

        form = EventCreateForm()

        return render_to_response('create_event.html',{'form':form})

def open_quiz(request):

    """ check for admin and then for quiz status.

    """

    try:

        event = Event.objects.all()[0]

    except IndexError:

        return redirect('/event/create/%s'%ADMIN_KEY)

    if event.quiz_status != "00":

        return redirect('/event/create/%s'%ADMIN_KEY)

    if request.method=="POST":

        form = OpenQuizForm(request.POST)

        if form.is_valid():

            data = form.cleaned_data

            quiz_num = data['quiz_num']

            topics = data['topics']

            for topic in topics:

                QuestionBank.objects.filter(topic=topic).update(quiz_num=quiz_num)

            event.quiz_status = quiz_num

            event.save()

            return render_to_response("open_quiz.html",{"admin_key":ADMIN_KEY, "quiz_name":num2name[quiz_num], 'success':True})

        else:

            return render_to_response("open_quiz.html", {"form":form})

    else:

        form = OpenQuizForm()

        return render_to_response("open_quiz.html", {"form":form})

def close_quiz(request):

    """ check for admin and then for quiz status.

    """

    try:

        event = Event.objects.all()[0]

    except IndexError:

        return redirect('/event/create/%s'%ADMIN_KEY)

    if event.quiz_status == "00":

        return redirect('/event/create/%s'%ADMIN_KEY)

    quiz_num = event.quiz_status

    event.quiz_status = "00"

    event.save()

    event_quizzes = event.quiz.filter(quiz_num=quiz_num)

    for quiz in event_quizzes:

        correct_quiz(quiz)

    return render_to_response("close_quiz.html", {"admin_key":ADMIN_KEY, "quiz_name":num2name[quiz_num]})

def list_toppers(request, quiz_num):

    """ check for admin key

    Then check for quiz_num in ['11', ..]

    then give appropriate response.

    """

    try:

        event = Event.objects.all()[0]

    except IndexError:

        return redirect('/event/create/%s'%ADMIN_KEY)

    if quiz_num not in ["11", "12", "21"]:

        raise Http404

    quizzes = Quiz.objects.filter(event=event,quiz_num=quiz_num)

    quizzes_with_scores = quizzes.annotate(score=Sum('que_answered__is_correct'))

    sorted_quizzes = quizzes_with_scores.order_by("score").reverse()

    return render_to_response("list_toppers.html", {"sorted_quizzes":sorted_quizzes,"admin_key":ADMIN_KEY, "event":event, "quiz_name":num2name[quiz_num]})

def user_dump(request, quiz_key, user_name):

    """ check for admin_key

    then get quiz by quiz_key and user_name.

    then display the dump

    """

    try:

        event = Event.objects.all()[0]

    except IndexError:

        return redirect('/event/create/%s'%ADMIN_KEY)

    try:

        quiz = Quiz.objects.get(event=event, key=quiz_key)

    except Quiz.DoesNotExist:

        raise Http404

    if not quiz.user.username == user_name:

        raise Http404

    quiz_name = num2name[quiz.quiz_num]

    if request.method == "POST":

        for ans in quiz.que_answered.all():

            ans.is_correct = True if str(ans.question.id) in request.POST else False

            ans.save()

        return redirect("/quiz/toppers/%s/%s"%(ADMIN_KEY, quiz.quiz_num))

    else:

        return render_to_response("user_dump.html", {"quiz":quiz, "quiz_name":quiz_name, "admin_key":ADMIN_KEY}) 

def que_dump(request, que_id):

    """ check for admin key

    then simply render all answers corresponding to the question.

    """

    try:

        event = Event.objects.all()[0]

    except IndexError:

        return redirect('/event/create/%s'%ADMIN_KEY)

    try:

        question = QuestionBank.objects.get(id=que_id)

    except QuestionBank.DoesNotExist:

        raise Http404

    quiz_num = question.quiz_num

    quiz_name = num2name[quiz_num]

    answers = question.answer.all()

    if request.method == "POST":

        for ans in answers:

            ans.is_correct = True if str(ans.id) in request.POST else False

            ans.save()

        return redirect("/quiz/toppers/%s/%s"%(ADMIN_KEY, quiz_num))

    else:

        return render_to_response("que_dump.html", {"quiz_name":quiz_name, "question":question, "answers":answers})