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 django.contrib.auth.decorators import login_required


from .nlu_utils import (
    model_inference,
    analyze_inference,
    filter_with_last_ten_reviews
)


@login_required
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)