from django.contrib.syndication.views import Feed
from django.shortcuts import get_object_or_404
from django.urls import reverse
from django.utils.timezone import utc
from datetime import datetime
from feed_content.models import FeedCategory, FeedItem
from models import DailyFeedItemLogEntry

class DailyFeed(Feed):
    def get_object(self, request, feed_category_id):
        return get_object_or_404(FeedCategory, pk=feed_category_id)

    def title(self, obj):
        return obj.name

    def link(self, obj):
        return reverse('rss:daily', kwargs={'feed_category_id': obj.pk})

    def description(self, obj):
        return obj.description

    def items(self, obj):
        now = datetime.now()
        now_tuple = now.timetuple()

        item_count = FeedItem.objects.filter(feed_category=obj).count()
        if item_count > 0:
            starting_date = datetime(now_tuple.tm_year if now_tuple.tm_mon >= obj.starting_month else now_tuple.tm_year - 1, obj.starting_month, 1)
            offset = (now - starting_date).days % item_count
            feed_item = list(FeedItem.objects.filter(feed_category=obj).order_by('day_number')[offset:offset + 1])[0]
        else:
            feed_item = None

        if feed_item is None:
            return []

        log_entry, created = DailyFeedItemLogEntry.objects.get_or_create(
            request_date=now.date(),
            feed_category=obj,
            feed_item=feed_item,
            defaults={
                'category_name': obj.name,
                'message_text': feed_item.message_text,
                'request_count': 1
            }
        )

        if not created:
            log_entry.request_count += 1
            log_entry.save()

        return [log_entry]

    def item_title(self, item):
        return 'Content'

    def item_description(self, item):
        return item.message_text

    def item_guid(self, item):
        return str(item.pk)

    def item_link(self, item):
        return reverse('rss:daily', kwargs={'feed_category_id': item.feed_category.pk})

    def item_pubdate(self, item):
        return datetime.combine(item.request_date, datetime.min.time())