from django.shortcuts import render
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_protect

from boards.views.base import BaseBoardView
from boards.models import Tag, Post, Attachment


PARAM_SECTION_STR = 'section_str'
PARAM_LATEST_THREADS = 'latest_threads'
PARAM_IMAGES = 'images'

TEMPLATE = 'boards/landing.html'

MAX_NEW_THREADS = 10
RANDOM_IMAGE_COUNT = 3


class LandingView(BaseBoardView):
    @method_decorator(csrf_protect)
    def get(self, request):
        params = dict()

        params[PARAM_SECTION_STR] = Tag.objects.get_tag_url_list(
                Tag.objects.filter(required=True))
        params[PARAM_LATEST_THREADS] = Post.objects.filter(opening=True)\
                .order_by('-pub_time')[:MAX_NEW_THREADS]
        params[PARAM_IMAGES] = Attachment.objects.get_random_images(
            RANDOM_IMAGE_COUNT)

        return render(request, TEMPLATE, params)