import logging

from django.contrib import messages
from django.contrib.messages.views import SuccessMessageMixin
from django.db import transaction
from django.urls import reverse_lazy
from django.views.generic import FormView
from django.utils.translation import ugettext_lazy as _

from .forms import ContactUsForm

logger = logging.getLogger(__name__)


# Create your views here.
class ContactUsFormView(SuccessMessageMixin, FormView):
    template_name = None
    form_class = ContactUsForm
    http_method_names = ['post']
    success_message = _('Request has been sent successfully!')
    error_message = _('Some errors occurred during sending the request. Check the input fields or try latter.')

    def get_initial(self):
        initial = super().get_initial()
        if self.request.method == "GET":
            initial['type'] = RequestType.objects.order_by('order').first()
            if self.request.user.is_authenticated():
                initial['name'] = self.request.user.profile.get_full_name(self.request, self.request.user.profile)
                initial['email'] = self.request.user.email
        return initial

    def form_valid(self, form):
        try:
            with transaction.atomic():
                if self.request.user.is_authenticated():
                    form.instance.user = self.request.user
                form.save()
                files = []
                if len(self.request.FILES) > 0:
                    attachments = AttachmentFormSet(self.request.POST, self.request.FILES, form_kwargs={'request': form.instance})
                    if attachments.is_valid():
                        attachments.save()
                        files = attachments.get_file_absolute_urls(self.request)
                form.send_email(self.request, files)
            return super().form_valid(form)
        except ValueError as ve:
            logger.critical(ve)
            messages.error(self.request, self.error_message, 'danger')
        except Exception as e:
            logger.critical(e)
            messages.error(self.request, self.error_message, 'danger')

        return self.form_invalid(form)

    def form_invalid(self, form):
        context = self.get_context_data()
        if len(form.errors) > 0:
            context['form_show_errors'] = True
        return self.render_to_response(context)

    def get_success_url(self):
        return super().get_success_url()