from django.shortcuts import render
from django.utils import timezone
from django.shortcuts import redirect
from review.forms import ReplyForm
from review.models import Review, CustomReply
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger


from .nlu_utils import model_inference, analyze_inference, filter_with_last_ten_reviews


def predict_report(request, review_id):
    review = Review.objects.filter(review_id=review_id).first()
    if review is None:
        return redirect('un-replied-review')
    location_id = review.location.location_id
    text = review.comment.lower()
    res = model_inference(text=text)
    intents = analyze_inference(res)
    now = timezone.now()
    form = ReplyForm()
    date = now - timezone.timedelta(days=30)
    reviews = Review.objects.filter(reply=None, update_time__gte=date)\
        .exclude(comment=None, star_rating=5).order_by('update_time')
    page = request.GET.get('page', 1)
    paginator = Paginator(reviews, 15)
    try:
        reviews = paginator.page(page)
    except PageNotAnInteger:
        reviews = paginator.page(1)
    except EmptyPage:
        reviews = paginator.page(paginator.num_pages)
    if review.star_rating == 5:
        replies = {}
        for intent in intents.keys():
            r = CustomReply.objects.filter(reply_category=intent)
            filtered_replies = filter_with_last_ten_reviews(location_id, r)
            replies[intent] = filtered_replies

        # ================================================================================================================================
        # This is for temporary use, It will be remove in future release.
        # This part of code block is used for show all reviews as intent classifier make mistake sometime.
        replies2 = {}
        rep_cls = {'staff', 'facility', 'kids', 'quick', 'general_review', 'open_24', 'continuous_visit'}.difference(set(intents.keys()))
        for c in rep_cls:
            r = CustomReply.objects.filter(reply_category=c)
            filtered_replies = filter_with_last_ten_reviews(location_id, r)
            replies2[c] = filtered_replies

        # End of the temporary code block
        # ================================================================================================================================
    else:
        cr = CustomReply.objects.values('reply_category').distinct()
        cr_li = {c_r['reply_category'] for c_r in cr}
        rep_cls = cr_li.difference({'staff', 'facility', 'kids', 'quick', 'general_review', 'open_24', 'continuous_visit', 'no_comment'})
        replies = {}
        replies2 = None
        for c in rep_cls:
            r = CustomReply.objects.filter(reply_category=c)
            filtered_replies = filter_with_last_ten_reviews(location_id, r)
            replies[c] = filtered_replies
    context = {
        'reviews': reviews,
        'form': form,
        'intents': intents,
        'replies': replies,
        'replies2': replies2         # This context is associate with the temporary code that mentioned above.
    }
    return render(request, 'dashboard.html', context)