from django.http import Http404
from django.shortcuts import get_object_or_404, render

from apps.catalog.models import Brand, Category, ModerationStatus, Product
from apps.content.models import Banner, Collection

PUBLISHED = ModerationStatus.PUBLISHED


def home(request):
    banners = Banner.objects.filter(is_active=True)
    collections = Collection.objects.filter(is_published=True)
    products = Product.objects.filter(
        moderation_status=PUBLISHED, is_active=True,
    )[:8]
    return render(request, 'catalog/home.html', {
        'banners': banners,
        'collections': collections,
        'products': products,
    })


def catalog(request):
    qs = Product.objects.filter(moderation_status=PUBLISHED, is_active=True)

    current_category = None
    cat_slug = request.GET.get('category')
    if cat_slug:
        current_category = get_object_or_404(Category, slug=cat_slug)
        qs = qs.filter(category=current_category)

    q = request.GET.get('q', '').strip()
    if q:
        qs = qs.filter(name__icontains=q)

    categories = Category.objects.filter(parent__isnull=True)

    return render(request, 'catalog/catalog.html', {
        'products': qs,
        'categories': categories,
        'current_category': current_category,
        'q': q,
    })


def product_detail(request, slug):
    product = get_object_or_404(
        Product, slug=slug, moderation_status=PUBLISHED, is_active=True,
    )
    return render(request, 'catalog/product_detail.html', {'product': product})


def brand_detail(request, slug):
    brand = get_object_or_404(Brand, slug=slug)
    # Неодобренные бренды видны только модераторам/администраторам (для проверки).
    if brand.verification_status != 'approved' and not request.user.is_staff:
        raise Http404
    products = brand.products.filter(moderation_status=PUBLISHED, is_active=True)
    return render(request, 'catalog/brand_detail.html', {
        'brand': brand,
        'products': products,
    })