import json
import re

import pydash as _;

_.map = _.map_;
_.filter = _.filter_
from pprint import pformat
from django.shortcuts import render, redirect, get_object_or_404
from django.conf import settings
from django.contrib import messages
from django.db.models import Q
from django.core.urlresolvers import reverse
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from django.core.exceptions import PermissionDenied
from django.http import JsonResponse, HttpResponse, HttpResponseForbidden
from django.core.files.base import ContentFile
from django.views.generic import ListView, DetailView, CreateView, View, \
    UpdateView, DeleteView, TemplateView

from projects.models import BuildingClassfication, ConstructionType
from projects.forms import ProjectWorkTypeSuggestionForm
from archilance.mixins import BaseMixin
from common.forms import CustomRegistrationForm
from users.models import User
from .models import WorkSell, Picture, WorkSellPhoto, WorkSellPhoto
from .forms import WorkSellForm, WorkSellFilterForm, ContractorWorkSellTrashForm
from .serialize import serialize
from .response import JSONResponse, response_mimetype
from specializations.models import Specialization
from common.models import Location
from archilance import util

class PictureCreateView(CreateView):
    model = Picture
    fields = '__all__'

    def form_valid(self, form):
        self.object = form.save()
        files = [serialize(self.object)]
        data = {'files': files}
        response = JSONResponse(data, mimetype=response_mimetype(self.request))
        response['Content-Disposition'] = 'inline; filename=files.json'
        return response

    def form_invalid(self, form):
        data = json.dumps(form.errors)
        return HttpResponse(content=data, status=400, content_type='application/json')


class BasicCreateView(PictureCreateView):
    template_name = 'picture_basic_form.html'


class WorkSellsView(ListView):
    model = WorkSell
    template_name = 'worksells_list.html'
    # paginate_by = 20
    paginate_by = 18

    def get_form_kwargs(self, **kwargs):
        kwargs = super().get_form_kwargs

    def get_queryset(self, **kwargs):
        qs = WorkSell.objects.all()
        # if self.request.GET:
        #     budget_from = self.request.GET
        #     pass
        return qs

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['building_classifications'] = BuildingClassfication.objects.all()
        context['construction_types'] = ConstructionType.objects.all()
        return context


class WorkSellFilterView(BaseMixin, View):
    template_name = 'worksell_filter.html'
    # form_class = WorkSellFilterForm
    include_template = 'partials/inc-worksell-results.html'
    PROJECT_ORDER_CHOICES = (  # "Упорядочить по"...
        ('name', 'названию'),
        ('budget', 'цене'),
    )

    def set_filter(self, objects, request_data):
        specialization = request_data.get('specialization')
        keywords = request_data.get('keywords')
        building_classification = request_data.get('building_classification')
        construction_type = request_data.get('construction_type')
        location = request_data.get('location')
        el_format = request_data.get('el_format')

        if keywords:
            keywords = tuple(filter(None, re.split(r'\s|,|;', keywords)))

            for k in keywords:
                objects = objects.filter(Q(name__icontains=k.lower()) | Q(description__icontains=k.lower()))

        if specialization:
            query = util.build_query(specialization, Specialization,
                                     'specializations__lft__gte',
                                     'specializations__rght__lte')
            objects = objects.filter(query)

        if building_classification:
            query = util.build_query(building_classification, BuildingClassfication,
                                     'building_classification__lft__gte',
                                     'building_classification__rght__lte')
            objects = objects.filter(query)
        #
        if construction_type:
            objects = objects.filter(construction_type__in=
                                       tuple(filter(None, re.split(r'\s|,|;', construction_type))))
        if location:
            query = util.build_query(location, Location,
                                     'location__lft__gte',
                                     'location__rght__lte')
            objects = objects.filter(query)

        if el_format:
            objects = objects.exclude(el_format=None)

        return objects

    def sort_by(self, objects, order_by):
        if not order_by:
            return objects
        return objects.order_by(order_by)

    def pagination(self, objects, page):
        paginator = Paginator(objects, settings.PAGE_SIZE)
        try:
            objects = paginator.page(page)
        except PageNotAnInteger:
            objects = paginator.page(1)
        except EmptyPage:
            objects = paginator.page(paginator.num_pages)
        return objects

    def get_context(self, request):
        context = request.dict()

        worksells = WorkSell.objects.all()
        worksells = self.set_filter(worksells, request)
        num_results = worksells.count()
        worksells = self.sort_by(worksells, request.get("order_by"))
        worksells = self.pagination(worksells, request.get("page"))

        has_additional_fields = bool(context.get("building_classification") or context.get(
            "construction_type") or context.get("location") or context.get("cro"))
        display_msg = 'Найдено %s проектов' % num_results if num_results > 0 else 'Ничего не найдено'
        context.update({
            'choices': self.PROJECT_ORDER_CHOICES,
            'worksells': worksells,
            'is_paginated': True,
            'display_msg': display_msg,
            'page_obj': worksells,
            'has_additional_fields': has_additional_fields
        })
        return context

    def get(self, request):
        return render(request, self.template_name, self.get_context(request.GET))

    def post(self, request):
        return render(request, self.include_template, self.get_context(request.POST))


class WorkSellDetail(DetailView):
    model = WorkSell
    template_name = 'worksell_detail.html'

    def dispatch(self, request, *args, **kwargs):
        if not self.get_object().contractor and not self.get_object().team:
            return HttpResponseForbidden('404 Not Found')
        return super().dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        # Своя собственная Работа
        self_worksell = False
        try:
            if self.get_object().id in [obj.id for obj in self.request.user.work_sell.all()]:
                self_worksell = True
        except AttributeError:
            pass

        context['worksell_related'] = WorkSell.objects.exclude(pk=self.get_object().pk)[:5]
        context['self_worksell'] = self_worksell
        return context


class WorkSellCreateView(BaseMixin, View):
    model = WorkSell
    form_class = WorkSellForm
    work_type_suggestion_form = ProjectWorkTypeSuggestionForm
    template_name = 'worksell_create.html'

    # Пускаем всех, т.к. незарегистрированный пользователь должен иметь возможность "Создать проект"
    # def dispatch(self, request, *args, **kwargs):
    #     if request.user.is_authenticated() and request.user.is_contractor():
    #         return super().dispatch(request, *args, **kwargs)
    #     else:
    #         raise PermissionDenied

    def get_context_data(self, **kwargs):
        ctx = super().get_context_data()
        user_form = CustomRegistrationForm()
        ctx['user_form'] = user_form
        return ctx

    def get(self, request, *args, **kwargs):
        context = self.get_context_data(**_.merge({}, request.GET, kwargs))

        form = self.form_class(request=request)
        work_type_suggestion_form = self.work_type_suggestion_form(request=request, prefix='work_type_suggestion')

        context.update({
            'form': form,
            'work_type_suggestion_form': work_type_suggestion_form,
        })

        return render(request, self.template_name, context)

    def post(self, request, *args, **kwargs):
        # print("request.POST = ", request.POST)
        # print("files = ", request.FILES.getlist('new_files'))
        request.POST = request.POST.copy()
        # Если фронт не будет возвращать пустую строку при незаполненных данных, то if'ы будут не нужны
        if request.POST.get('specializations') == "":
            print("POP")
            request.POST.pop('specializations')
        else:
            request.POST.setlist('specializations', request.POST.get('specializations', "").split(','))

        if request.POST.get('el_format') == "":
            request.POST.pop('el_format')
        else:
            request.POST.setlist('el_format', request.POST.get('el_format', "").split(','))
        form = self.form_class(request.POST, request=request)
        if form.is_valid():
            work_sell = form.save(commit=False)
            unregister_user = request.POST.get('not_auth_user_id')
            if unregister_user:
                user = get_object_or_404(User, pk=unregister_user)
            else:
                user = request.user
            work_sell.contractor = user
            work_sell.save()
            form.save_m2m()

            for file, desc in zip(request.FILES.getlist('new_files'), request.POST.getlist('img_description')):
                WorkSellPhoto.objects.create(img=file, description=desc, worksell=work_sell)

            redirect_to = reverse('work_sell:detail', kwargs={'pk': work_sell.pk})
            if request.is_ajax():
                return JsonResponse({'redirect_to': redirect_to}, status=200)
            messages.info(request, 'Работа успешно создана')
            return redirect(redirect_to)
        else:
            if form.errors:
                messages.info(request, (
                    '<p>Произошла ошибка (form)</p>'
                    '<pre>{form}</pre>'
                ).format(form=pformat(form.errors)))

                context = self.get_context_data(**kwargs)
                context.update({'form': form})
                if request.is_ajax():
                    data = json.dumps(form.errors)
                    return HttpResponse(content=data, status=400, content_type='application/json')
                return render(request, self.template_name, context)


class WorkSellUpdateView(UpdateView):
    model = WorkSell
    form_class = WorkSellForm
    template_name = 'worksell_edit.html'

    def dispatch(self, request, *args, **kwargs):
        if self.get_object().contractor_id != request.user.pk:
            return HttpResponseForbidden('403 Forbidden')
        return super().dispatch(request, *args, **kwargs)

    def get_success_url(self):
        return reverse('work_sell:detail', kwargs={'pk': self.object.pk})

    def form_valid(self, form):
        worksell = form.instance

        photos = form.cleaned_data['photos']

        WorkSellPhoto.objects.filter(worksell=worksell).delete()

        for photo in photos:
            WorkSellPhoto.objects.create(img=photo.img, worksell=worksell)

        live_images = form.cleaned_data['live_images']

        for live_image in live_images:
            new_image = ContentFile(live_image.file.read())
            new_image.name = live_image.file.name

            WorkSellPhoto.objects.create(img=new_image, worksell=worksell)

            live_image.file.delete()
            live_image.delete()

        return super().form_valid(form)


class WorkSellDeleteView(DeleteView):
    model = WorkSell
    template_name = 'worksell_delete.html'

    def get_success_url(self):
        return reverse('work_sell:filter')


class ContractorWorkSellTrashView(View):
    form_class = ContractorWorkSellTrashForm

    def post(self, request, *args, **kwargs):
        form = self.form_class(_.merge({}, request.POST, kwargs), request=request)
        if form.is_valid():
            worksell = form.cleaned_data.get('pk')
            worksell.delete()
            messages.info(request, 'Готовая работа удалена')
        else:
            messages.info(request, 'Произошла ошибка: <pre>{msg}</pre>'.format(msg=pformat(form.errors)))

        redirect_to = request.POST.get('next')
        return redirect(redirect_to)


class UploadView(View):
    template_name = 'upload.html'

    def get(self, request, *args, **kwargs):
        return render(request, self.template_name)


class JSONResponseMixin(object):
    def render_to_json_response(self, context, **response_kwargs):
        return JsonResponse(
            self.get_data(context),
            **response_kwargs
        )

    def get_data(self, context):
        context = {'test': 'data'}
        return context


class JSONView(JSONResponseMixin, TemplateView):
    def render_to_response(self, context, **response_kwargs):
        return self.render_to_json_response(context, **response_kwargs)