from django.db.models import Q

from django.shortcuts import get_object_or_404, render



from home.pagination import paginate



from .forms import BlogFilterForm

from .models import BlogPost





def blog_list(request):

    posts = BlogPost.objects.filter(is_published=True)

    form = BlogFilterForm(request.GET or None)

    featured = posts.filter(is_featured=True).first()

    if not featured:

        featured = posts.first()



    if form.is_valid():

        q = form.cleaned_data.get('q')

        category = form.cleaned_data.get('category')

        if q:

            posts = posts.filter(

                Q(title__icontains=q) | Q(excerpt__icontains=q) | Q(content__icontains=q)

            )

        if category:

            posts = posts.filter(category__iexact=category)



    list_posts = posts.exclude(pk=featured.pk if featured else None)

    page_obj, query_string, page_range = paginate(request, list_posts, per_page=9)



    categories = (

        BlogPost.objects.filter(is_published=True)

        .values_list('category', flat=True)

        .distinct()

        .order_by('category')

    )



    return render(request, 'blog/list.html', {

        'featured_post': featured,

        'posts': page_obj,

        'page_obj': page_obj,

        'query_string': query_string,

        'page_range': page_range,

        'form': form,

        'categories': categories,

        'total_count': page_obj.paginator.count,

    })





def blog_detail(request, slug):

    post = get_object_or_404(BlogPost, slug=slug, is_published=True)

    post.views_count += 1

    post.save(update_fields=['views_count'])

    related = BlogPost.objects.filter(is_published=True, category=post.category).exclude(pk=post.pk)[:3]

    return render(request, 'blog/detail.html', {'post': post, 'related_posts': related})