from django.contrib import messages
from django.contrib.sitemaps import Sitemap
from django.core.mail import mail_managers
from django.shortcuts import render, get_object_or_404, redirect
from django.views.generic import ListView, DetailView
from django.views.generic.edit import FormView, CreateView
from news.forms import CommentForm
from news.models import *


class NewsList(ListView):
    model = News
    template_name = 'news/list.jinja'
    queryset = News.objects.filter(is_public=True).order_by('-pk')

    def get_queryset(self):
        tag = self.request.GET.get('tag', None)
        retval = self.queryset
        if tag:
            retval = self.queryset.filter(
                    tags_list__slug__iexact=tag, is_public=True).order_by('-pk')
        return retval

    def get_context_data(self, **kwargs):
        retval = super(NewsList, self).get_context_data()
        tag = self.request.GET.get('tag', None)
        if tag:
            try:
                retval['tag'] = NewsTag.objects.get(slug=tag)
            except:
                pass
        return retval


def news_detail(request, slug):
    object = get_object_or_404(News, slug__iexact=slug, is_public=True)
    form = CommentForm(request.POST or None)
    if form.is_valid():
        comment = form.save(commit=False)
        comment.news = object
        comment.save()
        mail_managers('Новый комментарий к новости', '''
        Имя: {}
        Email: {}
        Комментарий: {}
        Новость: {}
        Ссылка на новость: http://batiskaf-kz.kz{}
        '''.format(
                form.cleaned_data['name'],
                form.cleaned_data['email'],
                form.cleaned_data['text'],
                object.title,
                object.get_absolute_url(),
        ))
        messages.success(request, 'Ваш комментарий успешно опубликован!')
        return redirect(object.get_absolute_url() + '#comment{}'.format(comment.pk))

    c = dict(
            object=object,
            form=form
    )
    return render(request, 'news/detail.jinja', c)


class NewsSitemap(Sitemap):
    changefreq = "never"
    priority = 0.7

    def items(self):
        return News.objects.filter(is_public=True)

    def lastmod(self, obj):
        return obj.created