# -*- coding: utf-8 -*-
import json

from django.core.urlresolvers import reverse_lazy
from django.views.generic import TemplateView, FormView
from django.http import HttpResponse
from django.shortcuts import redirect

from emencia.django.newsletter.forms import ContactForm
from emencia.django.newsletter.models import Contact, MailingList
from emencia.django.newsletter.forms import (
    SubscribeAssideForm, MailingSettingsForm
)
from accounts.models import User
from accounts.views import GetUserMixin
from functions.http import JsonResponse
from city.models import City


class SubscribeView(GetUserMixin, FormView):
    """
    Представление для подписки не/авторизованных пользователей
    """
    template_name = 'client/newsletters/mailing_settings.html'
    form_class = MailingSettingsForm

    def get_object(self):
        return self.get_user()

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        return super(SubscribeView, self).get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        return super(SubscribeView, self).post(request, *args, **kwargs)

    def form_valid(self, form):
        if self.request.POST.get('save'):
            contact = form.save()
            if not self.request.user.is_authenticated():
                contact.send_activation()

        if self.request.is_ajax():
            data = {'success': True}
            if self.request.POST.get('save'):
                data['redirect_url'] = str(self.get_success_url())
            return JsonResponse(data)

        return redirect(self.get_success_url())

    def form_invalid(self, form):
        if self.request.is_ajax():
            data = {
                'form_errors': form.errors,
            }
            return JsonResponse(data, status=400)
        return self.render_to_response(self.get_context_data(form=form))

    def get_initial(self):
        data = super(SubscribeView, self).get_initial()
        if self.request.GET.get('email'):
            data['email'] = self.request.GET['email']
        if self.request.GET.get('first_name'):
            data['first_name'] = self.request.GET['first_name']
        return data

    def get_form_kwargs(self):
        kwargs = super(SubscribeView, self).get_form_kwargs()
        if self.request.user.is_authenticated():
            kwargs.update({'instance': self.object})
        return kwargs

    def get_success_url(self):
        if not self.request.user.is_authenticated():
            return reverse_lazy('subscription_activation_send')
        return reverse_lazy('newsletter_subscription')

    def get_context_data(self, **kwargs):
        ctx = super(SubscribeView, self).get_context_data(**kwargs)
        ctx['object'] = self.object
        ctx['r_cities'] = self.get_russian_cities()
        ctx['checked_th'] = self.get_checked_th()

        if self.object is not None:
            if self.request.GET.get('unsibscribe') and self.object.subscriber:
                self.object.unsubscribe()
                ctx['unsubscribe_success'] = True
            elif not self.object.subscriber:
                ctx['unsubscribed'] = True

        return ctx

    def get_russian_cities(self):
        """
        :return: города России
        """
        return City.used.russia()

    def get_checked_th(self):
        """
        :return: выбранные пользователем темы
        """
        if self.object is not None:
            return self.object.themes.values_list('pk', flat=True)
        return []


class ActivationView(TemplateView):
    http_method_names = ['get']
    template_name = 'registration/activate.html'

    def get(self, request, *args, **kwargs):
        activated_contact = self.activate(request, *args, **kwargs)
        # add to announce list
        m = MailingList.objects.get(id=1)
        m.subscribers.add(activated_contact)
        if activated_contact:
            success_url = self.get_success_url(request, activated_contact)
            try:
                to, args, kwargs = success_url
                return redirect(to, *args, **kwargs)
            except ValueError:
                return redirect(success_url)
        return super(ActivationView, self).get(request, *args, **kwargs)

    def activate(self, request, activation_key):
        """
        Implement account-activation logic here.

        """
        activated_contact = Contact.objects.activate(activation_key)
        return activated_contact


    def get_success_url(self, request, user):
        return ('subscription_activation_complete', (), {})


def subscribe_aside(request):
    if request.POST:
        response = {'success': False}
        form = SubscribeAssideForm(request.POST)
        if form.is_valid():
            email = form.cleaned_data['email']
            try:
                user = User.objects.get(username=email)
            except User.DoesNotExist:
                user = None
            contact = Contact.objects.create_contact(email, user)
            contact_setting = form.save(commit=False)
            contact_setting.contact = contact
            contact_setting.exponent_practicum = True
            contact_setting.organiser_practicum = True
            contact_setting.save()
            form.save_m2m()
            response['success'] = True
        else:
            errors = form.errors
            if 'theme' in errors:
                errors['id_subscription_theme'] = errors['theme']
            response['errors'] = errors
        return HttpResponse(json.dumps(response, indent=2), content_type='application/json')
    else:
        return HttpResponse('not form request')


def popup_validate(request):
    response = {'success': False}
    if request.GET:
        form = ContactForm(request.GET)
        if form.is_valid():
            contact = form.save()
            contact.send_activation()
            response['success'] = True
            response['redirect'] = True
            response['redirect_url'] = SubscribeView.success_url
        else:
            response['errors'] = form.errors

    return HttpResponse(json.dumps(response, indent=2), content_type='application/json')


def landing_partisipation_validate(request):
    response = {'success': False}
    if request.method == 'POST' and request.is_ajax():
        form = ContactForm(request.POST)
        if form.is_valid():
            contact = form.save()
            contact.send_activation()
            response['success'] = True
        else:
            response['errors'] = form.errors
    return HttpResponse(json.dumps(response), content_type='application/json')