import json
from dal import autocomplete
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 (
    FieldError,
    ObjectDoesNotExist,
    PermissionDenied,
    ViewDoesNotExist,
)

from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
from django.views.generic.detail import DetailView
from generic.mixins import SuperuserRequiredMixin

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 (
    CaseForm,
    SeriesForm,
    SeriesImageFormSet,
    SeriesFormSet,
    CaseDifferentialFormSet,
    ExaminationForm,
    SeriesFindingForm,
)
from .models import (
    Case,
    Condition,
    Series,
    Examination,
    Finding,
    Subspecialty,
    SeriesFinding,
    SeriesImage,
)
from .tables import AtlasTable, SeriesTable
from .filters import AtlasFilter, SeriesFilter

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

from .decorators import (
    user_is_author_or_atlas_checker,
    user_is_author_or_atlas_checker_or_atlas_marker,
    user_is_author_or_atlas_series_checker_or_atlas_marker,
    user_is_atlas_checker,
    user_is_author_or_atlas_series_checker,
    user_is_atlas_marker,
    user_is_author_or_atlas_checker_or_atlas_marker,
)

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 generic.views import ExamCloneMixin, ExamViews
from reversion.views import RevisionMixin
import reversion


from rest_framework import viewsets

from zipview.views import BaseZipView

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="atlas_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


@login_required
@user_is_author_or_atlas_checker_or_atlas_marker
def case_detail(request, pk):
    case = get_object_or_404(Case, pk=pk)

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

    # logging.debug(atlas.subspecialty.first().name.all())
    return render(request, "atlas/case_detail.html", {"case": case})


@login_required
@user_is_author_or_atlas_series_checker_or_atlas_marker
def series_detail(request, pk):
    series = get_object_or_404(Series, pk=pk)

    # if request.user not in atlas.author.all():
    #    raise PermissionDenied
    series_finding_form = SeriesFindingForm(series_id=series.id)

    # logging.debug(atlas.subspecialty.first().name.all())
    return render(
        request,
        "atlas/series.html",
        {"series": series, "series_finding_form": series_finding_form},
    )


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

    atlas = Case.objects.filter(author=pk)

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


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

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


class AtlasDelete(RevisionMixin, AuthorOrCheckerRequiredMixin, DeleteView):
    model = Case
    success_url = reverse_lazy("atlas:case_view")


class SeriesFindingDelete(RevisionMixin, PermissionRequiredMixin, DeleteView):
    permission_required = "atlas.delete_seriesfinding"
    model = SeriesFinding
    template_name = "confirm_delete.html"
    # success_url = reverse_lazy("atlas:case_view")

    def get_success_url(self):
        pk = self.kwargs["pk"]
        series_id = get_object_or_404(SeriesFinding, pk=pk).series.id
        return reverse("atlas:series_detail", kwargs={"pk": series_id})


class SeriesDelete(RevisionMixin, AuthorOrCheckerRequiredMixin, DeleteView):
    model = Series
    success_url = reverse_lazy("atlas:series_view")


# @login_required
# @user_is_author_or_atlas_checker
# def case_clone(request, pk):
#    new_item = get_object_or_404(Case, 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 = CaseForm(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, "atlas/case_form.html", context)


class SeriesCreate(RevisionMixin, LoginRequiredMixin, CreateView):
    model = Series
    form_class = SeriesForm

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

            initial["case"] = case.id

            return initial

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

        if self.request.POST:
            context["image_formset"] = SeriesImageFormSet(
                self.request.POST, self.request.FILES
            )
            context["image_formset"].full_clean()
        else:
            context["image_formset"] = SeriesImageFormSet()
        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 SeriesUpdate(
    RevisionMixin, LoginRequiredMixin, AuthorOrCheckerRequiredMixin, UpdateView
):
    model = Series
    form_class = SeriesForm

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]
    def get_context_data(self, **kwargs):
        context = super(SeriesUpdate, self).get_context_data(**kwargs)
        if self.request.POST:
            context["image_formset"] = SeriesImageFormSet(
                self.request.POST, self.request.FILES, instance=self.object
            )
            context["image_formset"].full_clean()
        else:
            context["image_formset"] = SeriesImageFormSet(instance=self.object)
        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)
        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 AtlasCreateBase(RevisionMixin, LoginRequiredMixin, CreateView):
    model = Case
    form_class = CaseForm

    def get_form_kwargs(self):
        kwargs = super(AtlasCreateBase, self).get_form_kwargs()
        kwargs.update({"user": self.request.user})
        return kwargs

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

    def form_valid(self, form):

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

        # Add exam objects

        self.object.save()

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

        context = self.get_context_data(form=form)
        series_formset = context["series_formset"]
        casedifferential_formset = context["casedifferential_formset"]
        if series_formset.is_valid() and casedifferential_formset.is_valid():
            response = super().form_valid(form)
            series_formset.instance = self.object
            series_formset.save()
            casedifferential_formset.instance = self.object
            casedifferential_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("atlas:case_clone", pk=self.object.pk)

        else:
            return super().form_invalid(form)


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


class AtlasUpdate(
    RevisionMixin, LoginRequiredMixin, AuthorOrCheckerRequiredMixin, UpdateView
):
    model = Case
    form_class = CaseForm

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


#    def get_form_kwargs(self):
#        kwargs = super(AtlasUpdate, self).get_form_kwargs()
#        kwargs.update({"user": self.request.user})
#        return kwargs
#
#    def get_context_data(self, **kwargs):
#        context = super(AtlasUpdate, 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()
#
#        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 AtlasClone(AtlasCreateBase):
    """Clones a existing atlas"""

    #    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(Case, pk=self.kwargs["pk"])
        initial_data = model_to_dict(old_object, exclude=["id"])

        return initial_data


@login_required
@user_is_author_or_atlas_checker
def atlas_scrap(request, pk):
    try:
        atlas = Case.objects.get(pk=pk)
    except Case.DoesNotExist:
        raise Http404("Case does not exist")

    atlas.scrapped = not atlas.scrapped
    atlas.save()
    return HttpResponseRedirect(reverse("atlas:case_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, "atlas/create_simple.html", {'form': form})


@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, "atlas/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("/")


class CaseView(LoginRequiredMixin, SingleTableMixin, FilterView):
    model = Case
    table_class = AtlasTable
    template_name = "atlas/view.html"

    filterset_class = AtlasFilter


class SeriesView(LoginRequiredMixin, SingleTableMixin, FilterView):
    model = Series
    table_class = SeriesTable
    template_name = "atlas/view.html"

    filterset_class = SeriesFilter


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

    return redirect("atlas:series_detail", pk=pk)


@login_required
@user_is_author_or_atlas_series_checker
def series_order_dicom_instance(request, pk):
    series = get_object_or_404(Series, 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("atlas:series_detail", pk=pk)


@login_required
@user_is_author_or_atlas_series_checker
def series_order_dicom_SeriesInstanceUID(request, pk):
    series = get_object_or_404(Series, 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("atlas:series_detail", pk=pk)


@login_required
@user_is_author_or_atlas_series_checker
def series_order_upload_filename(request, pk):
    series = get_object_or_404(Series, pk=pk)
    series.order_by_upload_filename()

    return redirect("atlas:series_detail", pk=pk)


class SeriesImagesZipView(SuperuserRequiredMixin, BaseZipView):
    """Download all images from an image series"""

    def get_files(self):
        series = Series.objects.get(pk=self.kwargs["pk"])

        return [i.image.file for i in series.images.all()]


def create_series_findings(request):
    # posts = Post.objects.all()
    response_data = {}

    if request.POST.get("action") == "post":
        series_id = request.POST.get("series")
        findings_ids = json.loads(request.POST.get("findings"))
        description = request.POST.get("description")
        annotation_json = request.POST.get("annotation_json")
        viewport_json = request.POST.get("viewport_json")

        series = Series.objects.get(pk=series_id)
        findings = Finding.objects.filter(pk__in=findings_ids)

        sf = SeriesFinding.objects.create(
            series=series,
            description=description,
            annotation_json=annotation_json,
            viewport_json=viewport_json,
        )
        sf.findings.set(findings)
        sf.save()
        return JsonResponse({"success": True})

    return JsonResponse({"success": False})
    return render(request, "create_post.html", {"posts": posts})


class ConditionAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        # Don't forget to filter out results depending on the visitor !
        if not self.request.user.is_authenticated:
            return Condition.objects.none()

        qs = Condition.objects.all()

        if self.q:
            # This raises a fielderror which breaks creating a new item if not caught
            try:
                primary = qs.filter(name__icontains=self.q)

                # synonyms = qs.filter(name__icontains=self.q, primary_name=False)
                # for s in synonyms:
                #    primary.extend(s.synonym.filter(primary_name=True))

            except FieldError:
                return Condition.objects.none()

        return primary