from django.core.paginator import Paginator, EmptyPage
from django.shortcuts import render
from django.http import HttpResponse
from django.contrib.postgres.search import SearchQuery, SearchRank, SearchVector

from models import Recording, Session


def index(request, page=1):
    obj = Session.objects.all()

    query = request.GET.get('q', None)
    if query:
        vector  = SearchVector('title', 'sets__desc',
                               'sets__recordings__title',
                               'sets__recordings__artist',
                               'sets__recordings__location',
                               'sets__recordings__album',
                               'sets__recordings__date',
                               'sets__recordings__file')
        obj = obj.annotate(search=vector).filter(search=query)
        obj = obj.distinct()

    paginator = Paginator(obj, 10)
    try:
        sessions = paginator.page(page)
    except EmptyPage:
        sessions = paginator.page(paginator.num_pages)

    return render(request, 'music.htm', {'sessions': sessions})