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

from django.core.urlresolvers import reverse_lazy
from django.views.generic import TemplateView, FormView
from django.http import HttpResponseRedirect, 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.custom_views import ContextMixin
from city.models import City


class SubscribeView(GetUserMixin, ContextMixin, FormView):
    form_class = ContactForm
    template_name = 'client/newsletters/subcribe.html'
    success_url = reverse_lazy('subscription_activation_send')

    def get_form(self, form_class):
        if self.request.POST:
            email = self.request.POST.get('email')
            if email:
                try:
                    contact = Contact.objects.get(email=email)
                    return form_class(instance=contact,
                                      **self.get_form_kwargs())
                except Contact.DoesNotExist:
                    pass

            return form_class(**self.get_form_kwargs())
        else:
            return form_class(**self.get_form_kwargs())

    def form_valid(self, form):
        contact = form.save()
        contact.send_activation()
        return HttpResponseRedirect(self.success_url)

    def get_initial(self):
        data = super(SubscribeView, self).get_initial()
        if self.request.user.is_authenticated():
            email = getattr(self.request.user, 'email')
            data['email'] = email
            data['first_name'] = getattr(self.request.user, 'first_name')
        if self.request.GET:
            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_context_data(self, **kwargs):
        ctx = super(SubscribeView, self).get_context_data(**kwargs)
        ctx['mailsettings_object'] = self.get_mailsettings_object()
        ctx['mailsettings_form'] = MailingSettingsForm(
            instance=self.get_user()
        )
        return ctx

    def get_mailsettings_object(self):
        """
        передаём контекст в шаблон по городам, странам, а так же выбранным
        :return: instance of mail settings
        """
        self.extra_ctx.update({
            'r_cities': City.used.russia(),
        })
        instance = self.get_user()
        if instance is not None:
            self.extra_ctx.update({
                'checked_f_countries': list(
                    instance.f_countries.values_list('pk', flat=True)),
                'checked_r_cities': list(
                    instance.r_cities.values_list('pk', flat=True)),
                'checked_tg': list(instance.tags.values_list('pk', flat=True)),
                'checked_th': list(
                    instance.themes.values_list('pk', flat=True)),
                'contact': instance,
            })
            if not instance.subscriber:
                self.extra_ctx.update({'unsubscribed': True})
        return instance


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')