import json
from django.shortcuts import render, get_object_or_404, redirect
from django import forms

# from django.contrib.auth.models import User
from django.contrib.auth.decorators import login_required, user_passes_test
from django.contrib.auth.models import User
from django.core.exceptions import ObjectDoesNotExist, PermissionDenied, ViewDoesNotExist

from django.contrib.auth.mixins import LoginRequiredMixin

from django.views.generic.edit import CreateView, UpdateView, DeleteView
from django.views.generic import ListView
from django.views.decorators.csrf import csrf_exempt

from django.urls import reverse_lazy, reverse

from django.http import Http404, JsonResponse
from django.http import HttpResponseRedirect, HttpResponse

from .forms import (
    LongForm,
    LongSeriesForm, LongSeriesImageFormSet,
    MarkLongQuestionForm,
    SeriesFormSet,
    NoteForm,
    ExaminationForm,
)
from .models import (
    Long, LongSeries,
    Note,
    Examination,
    Exam,
    CidUserAnswer,
)
from .tables import LongTable, LongSeriesTable
from .filters import LongFilter, LongSeriesFilter

from django_tables2 import SingleTableView, SingleTableMixin
from django_filters.views import FilterView

from .decorators import user_is_author_or_long_checker

from collections import defaultdict
import json
import statistics
import plotly.express as px

from django.core.cache import cache
from django.conf import settings

from helpers.images import image_as_base64

import logging
from copy import deepcopy
from django.forms.models import model_to_dict
from longs.forms import LongCreationDefaultForm
from longs.models import LongCreationDefault

from generic.views import ExamViews


from rest_framework import viewsets

from .serializers import ExamSerializer

import os

logger = logging.getLogger(__name__)


class AuthorOrCheckerRequiredMixin(object):
    def get_object(self, *args, **kwargs):
        obj = super().get_object(*args, **kwargs)
        if self.request.user.groups.filter(name="long_checker").exists() or self.request.user.is_superuser:
            return obj
        if self.request.user not in obj.get_author_objects():
            raise PermissionDenied()  # or Http404
        return obj


# def index(request):
#     other_longs = Long.objects.exclude(author=request.user.pk)
#     user_longs = Long.objects.filter(author=request.user.pk)
#     return render(
#         request,
#         "longs/index.html",
#         {"other_longs": other_longs, "user_longs": user_longs},
#     )


@login_required
def question_detail(request, pk):
    long = get_object_or_404(Long, pk=pk)

    # if request.user not in long.author.all():
    #    raise PermissionDenied

    # logging.debug(long.long_notes.first())
    # logging.debug(long.subspecialty.first().name.all())
    return render(request, "longs/question_detail.html", {"question": long})

@login_required
def long_series_detail(request, pk):
    series = get_object_or_404(LongSeries, pk=pk)

    # if request.user not in long.author.all():
    #    raise PermissionDenied

    # logging.debug(long.long_notes.first())
    # logging.debug(long.subspecialty.first().name.all())
    return render(request, "longs/long_series.html", {"series": series})

@login_required
def long_split(request, pk):
    long = get_object_or_404(Long, pk=pk)

    images = long.images.all()

    old_abnormality = long.abnormality.all()
    old_region = long.region.all()
    old_examination = long.examination.all()
    old_site = long.site.all()
    old_author = long.author.all()

    if not images:
        raise Http404

    for n in range(len(images) - 1):
        long.pk = None

        long.save()

        long.abnormality.set(old_abnormality)
        long.region.set(old_region)
        long.examination.set(old_examination)
        long.site.set(old_site)
        long.author.set(old_author)
        images[n].long = long
        images[n].save()

    # images[-1].long

    # if request.user not in long.author.all():
    #    raise PermissionDenied

    # logging.debug(long.long_notes.first())
    # logging.debug(long.subspecialty.first().name.all())
    return render(request, "longs/question_detail.html", {"question": long})


@login_required
def author_detail(request, pk):
    # logging.debug(Author.objects.all())
    # author = get_object_or_404(Author, pk=pk)
    author = User.objects.get(pk=pk)

    longs = Long.objects.filter(author=pk)

    return render(
        request, "longs/category_detail.html", {"category": author, "longs": longs}
    )


def author_list(request):
    authors = User.objects.all()

    return render(request, "longs/author_list.html", {"authors": authors})


class LongCreationDefaultView(LoginRequiredMixin, UpdateView):
    model = LongCreationDefault
    form_class = LongCreationDefaultForm

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]
    # def dispatch(self, request, *args, **kwargs):
    #     """
    #     Overridden so we can make sure the `Long` instance exists
    #     before going any further.
    #     """
    #     self.pk = get_object_or_404(Long, pk=kwargs['pk'])
    #     return super().dispatch(request, *args, **kwargs)
    def get_object(self, queryset=None):
        obj, create = LongCreationDefault.objects.get_or_create(
            author=self.request.user
        )

        return obj

    def form_valid(self, form):

        model = form.save(commit=False)

        model.author = self.request.user
        model.save()

        response = super().form_valid(form)

        return response

        # form.instance.author.add(self.request.user.id)


class AddNote(LoginRequiredMixin, CreateView):
    model = Note
    form_class = NoteForm

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]
    def dispatch(self, request, *args, **kwargs):
        """
        Overridden so we can make sure the `Long` instance exists
        before going any further.
        """
        self.pk = get_object_or_404(Long, pk=kwargs["pk"])
        return super().dispatch(request, *args, **kwargs)

    def form_valid(self, form):

        note = form.save(commit=False)

        note.long = self.pk

        note.author = self.request.user
        note.save()

        response = super().form_valid(form)

        return response

        # form.instance.author.add(self.request.user.id)

#@login_required
#@user_is_author_or_long_checker
#def long_delete(request, pk):
    #q = get_object_or_404(Long, pk=pk)
    #q.delete()
class LongDelete(AuthorOrCheckerRequiredMixin, DeleteView):
    model = Long
    success_url = reverse_lazy("longs:long_view")

class LongSeriesDelete(AuthorOrCheckerRequiredMixin, DeleteView):
    model = LongSeries
    success_url = reverse_lazy("longs:long_series_view")

@login_required
def long_clone(request, pk):
    new_item = get_object_or_404(Long, pk=pk)
    new_item.pk = None  # autogen a new pk (item_id)
    # new_item.name = "Copy of " + new_item.name #need to change uniques

    form = LongForm(request.POST or None, instance=new_item)

    series_formset = SeriesFormSet()

    if form.is_valid():
        form.instance.author.add(request.user.id)

        # logger.debug(formset.is_valid())
        if series_formset.is_valid():
            response = super().form_valid(form)
            series_formset.instance = obj
            series_formset.save()

            return response
        else:
            return super().form_invalid(form)

    context = {
        "form": form,
        "series_formset": series_formset,
        # other context
    }

    return render(request, "longs/long_form.html", context)

class LongSeriesCreate(LoginRequiredMixin, CreateView):
    model = LongSeries
    form_class = LongSeriesForm

    def get_initial(self):
        # print(self.request)
        if "pk" in self.kwargs:
            initial = super().get_initial()
            long = get_object_or_404(Long, pk=self.kwargs["pk"])

            initial['long'] = long.id

            return initial

    def get_context_data(self, **kwargs):
        context = super(LongSeriesCreate, self).get_context_data(**kwargs)

        if self.request.POST:
            context["image_formset"] = LongSeriesImageFormSet(
                self.request.POST, self.request.FILES
            )
            context["image_formset"].full_clean()
        else:
            context["image_formset"] = LongSeriesImageFormSet()
        return context

    def form_valid(self, form):

        self.object = form.save(commit=False)
        self.object.save()

        form.instance.author.add(self.request.user.id)

        context = self.get_context_data(form=form)
        series_formset = context["image_formset"]
        if series_formset.is_valid():
            response = super().form_valid(form)
            series_formset.instance = self.object
            series_formset.save()
            return response

        else:
            return super().form_invalid(form)

class LongSeriesUpdate(LoginRequiredMixin, AuthorOrCheckerRequiredMixin, UpdateView):
    model = LongSeries
    form_class = LongSeriesForm

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]
    def get_context_data(self, **kwargs):
        context = super(LongSeriesUpdate, self).get_context_data(**kwargs)
        if self.request.POST:
            context["image_formset"] = LongSeriesImageFormSet(
                self.request.POST, self.request.FILES, instance=self.object
            )
            context["image_formset"].full_clean()
        else:
            context["image_formset"] = LongSeriesImageFormSet(instance=self.object)
        return context

    def form_valid(self, form):

        self.object = form.save(commit=False)
        self.object.save()

        # Do this in the form.save()
        #new_exams = list(form.cleaned_data['exams'].values_list("pk", flat=True))
        #self.object.exams.clear()
        #self.object.exams.add(*new_exams)

        form.instance.author.add(self.request.user.id)

        context = self.get_context_data(form=form)
        image_formset = context["image_formset"]
        # logger.debug(formset.is_valid())
        if image_formset.is_valid():
            response = super().form_valid(form)
            image_formset.instance = self.object
            image_formset.save()
            return response
        else:
            return super().form_invalid(form)

class LongCreateBase(LoginRequiredMixin, CreateView):
    model = Long
    form_class = LongForm

    def get_context_data(self, **kwargs):
        context = super(LongCreateBase, self).get_context_data(**kwargs)
        if self.request.POST:
            context["series_formset"] = SeriesFormSet(
                self.request.POST, self.request.FILES
            )
            context["series_formset"].full_clean()
        else:
            context["series_formset"] = SeriesFormSet()
        return context

    def form_valid(self, form):

        self.object = form.save(commit=False)

        # Add exam objects

        self.object.save()

        # Do this in the form.save()
        #new_exams = list(form.cleaned_data['exams'].values_list("pk", flat=True))
        #self.object.exams.clear()
        #self.object.exams.add(*new_exams)

        form.instance.author.add(self.request.user.id)

        context = self.get_context_data(form=form)
        series_formset = context["series_formset"]
        if series_formset.is_valid():
            response = super().form_valid(form)
            series_formset.instance = self.object
            series_formset.save()
            # If the normal submit button is pressed we save as normal
            if "submit" in self.request.POST:
                return response
            # else we redirect to the clone url
            else:
                return redirect("longs:long_clone", pk=self.object.pk)

        else:
            return super().form_invalid(form)


# @login_required
class LongCreate(LongCreateBase):
    def get_initial(self):
        # There has to be a better way...
        try:
            s = (i.pk for i in self.request.user.long_default.site.all())
            self.initial.update({"site": s})
        except AttributeError:
            pass
        return self.initial

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]

    # self.object = form.save(commit=False)
    # self.object.save()

    # form.instance.author.add(self.request.user.id)
    # return super().form_valid(form)


class LongUpdate(LoginRequiredMixin, AuthorOrCheckerRequiredMixin, UpdateView):
    model = Long
    form_class = LongForm

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]
    def get_context_data(self, **kwargs):
        context = super(LongUpdate, self).get_context_data(**kwargs)
        if self.request.POST:
            context["series_formset"] = SeriesFormSet(
                self.request.POST, self.request.FILES, instance=self.object
            )
            context["series_formset"].full_clean()
        else:
            context["series_formset"] = SeriesFormSet(instance=self.object)
        return context

    def form_valid(self, form):

        self.object = form.save(commit=False)
        self.object.save()

        # Do this in the form.save()
        #new_exams = list(form.cleaned_data['exams'].values_list("pk", flat=True))
        #self.object.exams.clear()
        #self.object.exams.add(*new_exams)

        form.instance.author.add(self.request.user.id)

        context = self.get_context_data(form=form)
        series_formset = context["series_formset"]
        # logger.debug(formset.is_valid())
        if series_formset.is_valid():
            response = super().form_valid(form)
            series_formset.instance = self.object
            series_formset.save()
            return response
        else:
            return super().form_invalid(form)


class LongClone(LongCreateBase):
    """Clones a existing long"""

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]
    def get_initial(self):
        # print(self.request)
        old_object = get_object_or_404(Long, pk=self.kwargs["pk"])
        initial_data = model_to_dict(old_object, exclude=["id"])

        return initial_data


@login_required
@user_is_author_or_long_checker
def long_scrap(request, pk):
    try:
        long = Long.objects.get(pk=pk)
    except Long.DoesNotExist:
        raise Http404("Long does not exist")

    long.scrapped = not long.scrapped
    long.save()
    return HttpResponseRedirect(reverse("longs:question_detail", args=(pk,)))


# @login_required
# def edit_abnormality_popup(request):
#     instance = get_object_or_404(Abnormality, pk = pk)
#     form = AbnormalityForm(request.POST or None)
#     if form.is_valid():
#         instance = form.save()
#         return HttpResponse('<script>opener.closePopup(window, "%s", "%s", "#id_abnormality");</script>' % (instance.pk, instance))
#     return render(request, "longs/create_simple.html", {'form': form})


@login_required
def create_abnormality(request):
    form = AbnormalityForm(request.POST or None)
    if form.is_valid():
        instance = form.save()
        return HttpResponse(
            '<script>opener.closePopup(window, "%s", "%s", "#id_abnormality");</script>'
            % (instance.pk, instance)
        )
    return render(
        request, "longs/create_simple.html", {"form": form, "name": "Abnormality"}
    )


@csrf_exempt
def get_abnormality_id(request):
    if request.is_ajax():
        abnormality_name = request.GET["abnormality_name"]
        abnormality_id = Abnormality.objects.get(name=abnormality_name).id
        data = {
            "abnormality_id": abnormality_id,
        }
        return HttpResponse(json.dumps(data), content_type="application/json")
    return HttpResponse("/")


@login_required
def create_examination(request):
    form = ExaminationForm(request.POST or None)
    if form.is_valid():
        instance = form.save()
        return HttpResponse(
            '<script>opener.closePopup(window, "%s", "%s", "#id_examination");</script>'
            % (instance.pk, instance)
        )
    return render(
        request, "longs/create_simple.html", {"form": form, "name": "Examination"}
    )


@csrf_exempt
def get_examination_id(request):
    if request.is_ajax():
        examination_name = request.GET["examination_name"]
        examination_id = Examination.objects.get(name=examination_name).id
        data = {
            "examination_id": examination_id,
        }
        return HttpResponse(json.dumps(data), content_type="application/json")
    return HttpResponse("/")


@login_required
def create_region(request):
    form = RegionForm(request.POST or None)
    if form.is_valid():
        instance = form.save()
        return HttpResponse(
            '<script>opener.closePopup(window, "%s", "%s", "#id_region");</script>'
            % (instance.pk, instance)
        )
    return render(
        request, "longs/create_simple.html", {"form": form, "name": "Region"}
    )


@csrf_exempt
def get_region_id(request):
    if request.is_ajax():
        region_name = request.GET["region_name"]
        region_id = Region.objects.get(name=region_name).id
        data = {
            "region_id": region_id,
        }
        return HttpResponse(json.dumps(data), content_type="application/json")
    return HttpResponse("/")


class LongView(LoginRequiredMixin, SingleTableMixin, FilterView):
    model = Long
    table_class = LongTable
    template_name = "longs/view.html"

    filterset_class = LongFilter

class LongSeriesView(LoginRequiredMixin, SingleTableMixin, FilterView):
    model = LongSeries
    table_class = LongSeriesTable
    template_name = "longs/view.html"

    filterset_class = LongSeriesFilter


def loadJsonAnswer(answer):
    eid = int(answer["eid"].split("/")[1])

    # As access is not restricted make sure the data appears valid
    if (not isinstance(answer["cid"], int)) or (
        not isinstance(eid, int) or (not isinstance(answer["ans"], str))
    ):
        return JsonResponse(
            {"success": False, "error": "cid or eid or answers not defined"}
        )

    # The model should catch invalid data but this should be less intensive
    max_int = 999999999999999999999
    if answer["cid"] > max_int or eid > max_int:
        return JsonResponse({"success": False, "error": "invalid cid"})

    exam = get_object_or_404(Exam, pk=eid)

    if not exam.active:
        return JsonResponse(
            {"success": False, "error": "No active exam: {}".format(eid)}
        )

    exiting_answers = CidUserAnswer.objects.filter(
        question__id=answer["qid"], exam__id=eid, cid=answer["cid"]
    )

    posted_answer = answer["ans"]
    
    # Long cases seperate sections by qidn
    qidn = answer["qidn"]


    # If the user answer does not exist
    if not exiting_answers:
        ans = CidUserAnswer(cid=answer["cid"])
        ans.question_id = answer["qid"]
        ans.exam_id = eid


    # If the answer already exists or we have started populating it
    else:
        # Update an existing answer
        # should never be more than one (famous last words)
        ans = exiting_answers[0]

    if qidn == "1":
        ans.answer_observations = posted_answer
    elif qidn == "2":
        ans.answer_interpretation = posted_answer
    elif qidn == "3":
        ans.answer_principle_diagnosis = posted_answer
    elif qidn == "4":
        ans.answer_differential_diagnosis = posted_answer
    elif qidn == "5":
        ans.answer_management = posted_answer

    # Mark as unmarked
    ans.score = ans.ScoreOptions.UNMARKED

    ans.full_clean()
    ans.save()

    return True


@login_required
def mark_answer(request, pk, sk, tk):
    exam = get_object_or_404(Exam, pk=pk)

    questions = exam.exam_questions.all()

    n = sk

    question_details = {
        "total": len(questions),
        "current": n + 1,
    }

    try:
        question = questions[sk]
    except IndexError:
        raise Http404("Exam question does not exist")

    try:
        answer = question.cid_user_answers.get(cid=tk)
    except ObjectDoesNotExist:
        raise Http404("User answer does not exist")

    try:
        unmarked = question.GetUnmarkedAnswers()
        next_unmarked_id = unmarked[0].cid
        if next_unmarked_id == tk:
            next_unmarked_id = unmarked[1].cid
    except IndexError:
        next_unmarked_id = False

    if request.method == "POST":

        form = MarkLongQuestionForm(request.POST)

        if form.is_valid():
            # If skip button is pressed skip the question without marking
            # Skip is problematic if we skip to the next unmarked answer
            #if "skip" in request.POST:
            #    return redirect("longs:mark_answer", pk=pk, sk=sk, tk=next_unmarked_id)

            # Extract score from form and save it to the object
            answer.score = form.cleaned_data["score"]
            answer.save()

            if "next" in request.POST:
                return redirect("longs:mark_answer", pk=pk, sk=sk, tk=next_unmarked_id)
            #elif "previous" in request.POST:
            #    return redirect("longs:mark", pk=pk, sk=n - 1)

    else:
        form = MarkLongQuestionForm(initial={'score': answer.score})


    return render(
        request,
        "longs/mark_answer.html",
        {
            "exam": exam,
            "form": form,
            "answer": answer,
            "question": question,
            "question_details": question_details,
            "next_unmarked_id": next_unmarked_id,
        },
    )

# @user_passes_test(user_is_admin, login_url="/accounts/login")
@login_required
def mark(request, pk, sk):
    exam = get_object_or_404(Exam, pk=pk)

    questions = exam.exam_questions.all()

    n = sk

    question_details = {
        "total": len(questions),
        "current": n + 1,
    }

    try:
        question = questions[sk]
    except IndexError:
        raise Http404("Exam question does not exist")


    user_answers = question.cid_user_answers.all()

    return render(
        request,
        "longs/mark.html",
        {
            "exam": exam,
            "question": question,
            "question_details": question_details,
            "user_answers": user_answers,
        },
    )


@login_required
def exam_scores_cid(request, pk):
    exam = get_object_or_404(Exam, pk=pk)

    questions = exam.exam_questions.all()

    cids = (
        CidUserAnswer.objects.filter(question__in=questions)
        .order_by("cid")
        .values_list("cid", flat=True)
        .distinct()
    )

    user_answers_and_marks = defaultdict(list)
    user_answers_marks = defaultdict(list)
    user_answers = defaultdict(list)
    user_names = {}

    by_question = defaultdict(list)
    unmarked = set()

    # Loop through all candidates
    for cid in cids:
        # Convoluted (probably...)
        user_names[cid] = cid
        for q in questions:
            # Get user answer
            s = q.cid_user_answers.filter(cid=cid).first()

            if not s:
                # skip if no answer, (score 4)
                user_answers_marks[cid].append(4)
                #user_answers[cid].append("")
                by_question[q].append(("", 4))
                continue
            else:
                ans = ""
            answer_score = s.get_answer_score()
            if answer_score == "":
                index = exam.get_question_index(q)
                unmarked.add(index)
            #user_answers[cid].append(ans)
            user_answers_marks[cid].append(answer_score)
            #user_answers_and_marks[cid].append((ans, answer_score))

            by_question[q].append((ans, answer_score))

    user_scores = {}
    for user in user_answers_marks:
        user_scores[user] = sum(
            [i for i in user_answers_marks[user] if i != ""]
        )

    user_scores_list = list(user_scores.values())

    if len(user_scores_list) < 1:
        mean = 0
        median = 0
        mode = 0
        fig_html = ""
    else:
        mean = statistics.mean(user_scores_list)
        median = statistics.median(user_scores_list)
        try:
            mode = statistics.mode(user_scores_list)
        except statistics.StatisticsError:
            mode = "No unique mode"

        df = user_scores_list
        fig = px.histogram(
            df,
            x=0,
            title="{}: distribution of scores".format(exam),
            labels={"0": "Score"},
            height=400,
            width=600,
        )
        fig_html = fig.to_html()

    max_score = len(questions) * 2

    return render(
        request,
        "longs/exam_scores.html",
        {
            "cids": cids,
            "exam": exam,
            "unmarked": unmarked,
            "questions": questions,
            "by_question": by_question,
            #"user_answers": dict(user_answers),
            "user_answers_marks": dict(user_answers_marks),
            "user_scores": user_scores,
            "user_scores_list": user_scores_list,
            "user_names": user_names,
            #"user_answers_and_marks": user_answers_and_marks,
            "max_score": max_score,
            "mean": mean,
            "median": median,
            "mode": mode,
            "plot": fig_html,
        },
    )


def exam_scores_cid_user(request, pk, sk):
    exam = get_object_or_404(Exam, pk=pk)

    # TODO:Need some kind of test for cid
    cid = sk

    questions = exam.exam_questions.all()

    #answers_and_marks = []
    answers_marks = []
    #answers = []
    answer_text = []

    for q in questions:
        # Get user answer
        user_answer = q.cid_user_answers.filter(cid=cid).first()




        if not user_answer or user_answer is None:
            # skip if no answer
            #answers_marks.append("")
            #answers.append("")
            answer_score = 4
            #ans = "Not answered"
            answer_text.append((("Not answered"),("Not answered"),("Not answered"),("Not answered"),("Not answered")))
        else:
            answer_score = user_answer.get_answer_score()

            answer_text.append((user_answer.answer_observations, user_answer.answer_interpretation, user_answer.answer_principle_diagnosis, user_answer.answer_differential_diagnosis, user_answer.answer_management))

        if not exam.publish_results:
            answer_score = 0
        #answers.append(ans)
        answers_marks.append(answer_score)
        #answers_and_marks.append((ans, answer_score, correct_answer))

    answered = [i for i in answers_marks if i != ""]
    if "" in answers_marks:
        total_score = sum(answered)
        unmarked_number = len(answers_marks) - len(answered)
        total_score = "{} ({} unmarked)".format(total_score, unmarked_number)
    else:
        total_score = sum(answered)

    max_score = len(questions) * 2

    return render(
        request,
        "longs/exam_scores_user.html",
        {
            "exam": exam,
            "cid": cid,
            "questions": questions,
            #"answers": answers,
            "answers_marks": answers_marks,
            "total_score": total_score,
            "max_score": max_score,
            "answer_text": answer_text
            #"answers_and_marks": answers_and_marks,
        },
    )

@login_required
def long_series_order_dicom(request, pk):
    series = get_object_or_404(LongSeries, pk=pk)
    try:
        series.order_by_dicom()
    except:
        return HttpResponse('<h1>Series does not appear to contain dicoms</h1>')

    return redirect("longs:long_series_detail", pk=pk)

@login_required
def long_series_order_dicom_instance(request, pk):
    series = get_object_or_404(LongSeries, pk=pk)
    try:
        series.order_by_dicom("InstanceNumber")
    except:
        return HttpResponse('<h1>Series does not appear to contain dicoms (or field InstanceNumber)</h1>')

    return redirect("longs:long_series_detail", pk=pk)

@login_required
def long_series_order_dicom_SeriesInstanceUID(request, pk):
    series = get_object_or_404(LongSeries, pk=pk)
    try:
        series.order_by_dicom("SeriesInstanceUID")
    except:
        return HttpResponse('<h1>Series does not appear to contain dicoms (or field SeriesInstanceUID)</h1>')

    return redirect("longs:long_series_detail", pk=pk)

@login_required
def long_series_order_upload_filename(request, pk):
    series = get_object_or_404(LongSeries, pk=pk)
    series.order_by_upload_filename()

    return redirect("longs:long_series_detail", pk=pk)

LongExamViews = ExamViews(Exam, Long, "longs", "long", loadJsonAnswer)

class ExamViewSet(viewsets.ModelViewSet):
    queryset = Exam.objects.all().order_by('name')
    serializer_class = ExamSerializer

def question_json_unbased(request, pk):
    """
    No (file based) caching is enabled for unbased quesitons
    """
    question = get_object_or_404(Long, pk=pk)

    question_json = question.get_json(pk, based=False)
    return JsonResponse(question_json)

def question_json(request, pk):
    question = get_object_or_404(Long, pk=pk)
    #exam = get_object_or_404(self.Exam, pk=pk)

    #if not exam.active:
    #    raise Http404("No available exam")

    path= "{0}longs/questions/{1}.json".format(settings.MEDIA_ROOT, pk)
    url= "{0}longs/questions/{1}.json".format(settings.MEDIA_URL, pk)

    if os.path.isfile(path) and not question.recreate_json:
        return redirect(url)

    question_json = question.get_json(pk)

    question.recreate_json = False
    question.save()

    return redirect(question_json)

@login_required
def question_json_recreate(request, pk):
    question = get_object_or_404(Long, pk=pk)

    question.recreate_json = True
    question.save()

    question.get_json(pk)

    return redirect("longs:question_detail", pk=pk)