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 PermissionDenied

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 (
    RapidForm,
    ImageFormSet,
    NoteForm,
    RegionForm,
    AbnormalityForm,
    ExaminationForm,
    AnswerFormSet,
    AnswerUpdateFormSet,
)
from .models import Rapid, Note, Abnormality, Region, Examination
from .tables import RapidTable
from .filters import RapidFilter

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

from .decorators import user_is_author_or_rapid_checker

from collections import defaultdict

import logging
from copy import deepcopy
from django.forms.models import model_to_dict
from rapids.forms import RapidCreationDefaultForm
from rapids.models import RapidCreationDefault

logger = logging.getLogger(__name__)


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


@login_required
def index(request):
    other_rapids = Rapid.objects.exclude(author=request.user.pk)
    user_rapids = Rapid.objects.filter(author=request.user.pk)
    return render(
        request,
        "rapids/index.html",
        {"other_rapids": other_rapids, "user_rapids": user_rapids},
    )


@login_required
def rapid_detail(request, pk):
    rapid = get_object_or_404(Rapid, pk=pk)

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

    # logging.debug(rapid.rapid_notes.first())
    # logging.debug(rapid.subspecialty.first().name.all())
    return render(request, "rapids/rapid_detail.html", {"rapid": rapid})


@login_required
def rapid_split(request, pk):
    rapid = get_object_or_404(Rapid, pk=pk)

    images = rapid.images.all()

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

    if not images:
        raise Http404

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

        rapid.save()

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

    # images[-1].rapid

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

    # logging.debug(rapid.rapid_notes.first())
    # logging.debug(rapid.subspecialty.first().name.all())
    return render(request, "rapids/rapid_detail.html", {"rapid": rapid})


@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)

    rapids = Rapid.objects.filter(author=pk)

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


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

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


class RapidCreationDefaultView(LoginRequiredMixin, UpdateView):
    model = RapidCreationDefault
    form_class = RapidCreationDefaultForm

    #    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 `Rapid` instance exists
    #     before going any further.
    #     """
    #     self.pk = get_object_or_404(Rapid, pk=kwargs['pk'])
    #     return super().dispatch(request, *args, **kwargs)
    def get_object(self, queryset=None):
        obj, create = RapidCreationDefault.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 `Rapid` instance exists
        before going any further.
        """
        self.pk = get_object_or_404(Rapid, pk=kwargs["pk"])
        return super().dispatch(request, *args, **kwargs)

    def form_valid(self, form):

        note = form.save(commit=False)

        note.rapid = 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
def rapid_clone(request, pk):
    new_item = get_object_or_404(Rapid, 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 = RapidForm(request.POST or None, instance=new_item)

    image_formset = ImageFormSet()
    answer_formset = AnswerFormSet()

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

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

            answer_formset.instance = obj
            answer_formset.save()
            return response
        else:
            return super().form_invalid(form)

    context = {
        "form": form,
        "image_formset": image_formset,
        "answer_formset": answer_formset
        # other context
    }

    return render(request, "rapids/rapid_form.html", context)


class RapidCreateBase(LoginRequiredMixin, CreateView):
    model = Rapid
    form_class = RapidForm

    def get_context_data(self, **kwargs):
        context = super(RapidCreateBase, self).get_context_data(**kwargs)
        if self.request.POST:
            context["image_formset"] = ImageFormSet(
                self.request.POST, self.request.FILES
            )
            context["image_formset"].full_clean()
            context["answer_formset"] = AnswerFormSet(
                self.request.POST
            )
            context["answer_formset"].full_clean()
        else:
            context["image_formset"] = ImageFormSet()
            context["answer_formset"] = AnswerFormSet()
        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"]
        answer_formset = context["answer_formset"]
        if image_formset.is_valid() and answer_formset.is_valid():
            response = super().form_valid(form)
            image_formset.instance = self.object
            image_formset.save()
            answer_formset.instance = self.object
            answer_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("rapids:rapid_clone", pk=self.object.pk)

        else:
            return super().form_invalid(form)


# @login_required
class RapidCreate(RapidCreateBase):

    initial = {"laterality": Rapid.NONE}

    def get_initial(self):
        # There has to be a better way...
        try:
            s = (i.pk for i in self.request.user.rapid_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 RapidUpdate(LoginRequiredMixin, AuthorOrCheckerRequiredMixin, UpdateView):
    model = Rapid
    form_class = RapidForm

    #    fields = '__all__'
    #    #fields = [ 'condition' ]
    #    #initial = {'date_of_death': '05/01/2018'}
    #    exclude = [ 'created_date', 'published_date' ]
    def get_context_data(self, **kwargs):
        context = super(RapidUpdate, self).get_context_data(**kwargs)
        if self.request.POST:
            context["image_formset"] = ImageFormSet(
                self.request.POST, self.request.FILES, instance=self.object
            )
            context["image_formset"].full_clean()
            context["answer_formset"] = AnswerFormSet(
                self.request.POST, instance=self.object
            )
            context["answer_formset"].full_clean()
        else:
            context["image_formset"] = ImageFormSet(instance=self.object)
            context["answer_formset"] = AnswerFormSet(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"]
        answer_formset = context["answer_formset"]
        # logger.debug(formset.is_valid())
        if image_formset.is_valid() and answer_formset.is_valid():
            response = super().form_valid(form)
            image_formset.instance = self.object
            image_formset.save()
            answer_formset.instance = self.object
            answer_formset.save()
            return response
        else:
            return super().form_invalid(form)


class RapidClone(RapidCreateBase):
    """Clones a existing rapid"""

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

        return initial_data


@login_required
@user_is_author_or_rapid_checker
def rapid_scrap(request, pk):
    try:
        rapid = Rapid.objects.get(pk=pk)
    except Rapid.DoesNotExist:
        raise Http404("Rapid does not exist")

    rapid.scrapped = not rapid.scrapped
    rapid.save()
    return HttpResponseRedirect(reverse("rapids:rapid_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, "rapids/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, "rapids/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, "rapids/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, "rapids/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 RapidView(SingleTableMixin, FilterView):
    model = Rapid
    table_class = RapidTable
    template_name = "rapids/view.html"

    filterset_class = RapidFilter