# -*- coding: utf-8 -*-
from django.shortcuts import render
from django.contrib.auth.decorators import login_required
from products.models import Product, ProductCategory
import json


@login_required
def pos_terminal(request):
    """
    Tablet-friendly POS screen prototype.
    Shows categories and in-stock products for quick tap-to-add.
    """
    categories_qs = ProductCategory.objects.filter(is_active=True)
    products_qs = Product.objects.filter(in_stock=True).prefetch_related('categories')

    categories = [{'id': c.id, 'name': c.name} for c in categories_qs]
    products = [{
        'id': p.id,
        'name': p.name,
        'price': str(p.actual_price),
        'category_ids': [c.id for c in p.categories.all()]
    } for p in products_qs]

    context = {
        'categories_json': json.dumps(categories),
        'products_json': json.dumps(products),
        'title': 'POS Terminal',
    }
    return render(request, 'pos/terminal.html', context)