shoppy/web/views/web.py

from decimal import Decimal

from django.db.models import Sum
from django.http.response import HttpResponse, JsonResponse
from django.shortcuts import get_object_or_404, redirect, reverse
from django.utils.text import gettext_lazy as _
from django.views.decorators.http import require_http_methods
from django.views.generic import CreateView, TemplateView

from shop.models import (
    CartItem,
    Order,
    OrderLine,
    Product,
    ProductCategory,
    ShippingMethod,
    WishlistedProduct,
)
from shop.redsys import RedsysClient
from shop.utils import create_order_from_cart
from web.forms import CreateOrderForm
from web.mixins import FilteredQuerysetMixin, PaginatedQuerysetMixin
from web.models import WebSettings
from web.settings import ANONYMOUS_CART_ID_COOKIE_NAME
from web.utils import get_or_create_cart


class IndexView(TemplateView):
    template_name = "web/index.html"

    def get_context_data(self, **kwargs):
        settings = WebSettings.load()
        return {
            "title": settings.web_title,
            "description": settings.web_description,
        }


class CategoryView(TemplateView):
    template_name = "web/index.html"

    def get_context_data(self, **kwargs):
        settings = WebSettings.load()
        slug = kwargs.get("slug")
        category = ProductCategory.objects.get(slug=slug)

        return {
            "title": _(f"{settings.web_title} - {category.name}"),
            "description": settings.web_description,
            "category": category,
            "filter_by_category": True,
        }


class ProductDetail(TemplateView):
    template_name = "web/product_detail.html"

    def get_context_data(self, pk, slug, **kwargs):
        settings = WebSettings.load()
        product = get_object_or_404(Product, pk=pk)

        return {
            "product": product,
            "title": f"{settings.web_title} - {product.name}",
            "description": product.description,
            "image": product.images.first(),
        }


class CartDetail(TemplateView, CreateView):
    template_name = "web/cart_detail.html"
    form_class = CreateOrderForm

    def get_context_data(self, **kwargs):
        web_settings = WebSettings.load()
        cart, created = get_or_create_cart(self.request)
        cart_items = CartItem.objects.filter(cart=cart).prefetch_related("product")

        return {
            "title": web_settings.web_title,
            "cart": cart,
            "items": cart_items,
            "description": _("resumen del carrito"),
        }

    def post(self, request, *args, **kwargs):
        form = CreateOrderForm(request.POST)

        if not form.is_valid():
            context = self.get_context_data(**kwargs)
            context.update({"errors": form.errors})
            return self.render_to_response(context)

        shipping_method_id = form.cleaned_data.get("shipping_method")

        cart, created = get_or_create_cart(request)

        billing_address_full_name = form.cleaned_data.get("billing_address_full_name")
        billing_address_address = form.cleaned_data.get("billing_address")
        billing_address_town = form.cleaned_data.get("billing_address_town")
        billing_address_state = form.cleaned_data.get("billing_address_state")
        billing_address_country = form.cleaned_data.get("billing_address_country")
        billing_address_zip = form.cleaned_data.get("billing_address_zip")

        shipping_address_full_name = form.cleaned_data.get("shipping_address_full_name")
        shipping_address_address = form.cleaned_data.get("shipping_address")
        shipping_address_town = form.cleaned_data.get("shipping_address_town")
        shipping_address_state = form.cleaned_data.get("shipping_address_state")
        shipping_address_country = form.cleaned_data.get("shipping_address_country")
        shipping_address_zip = form.cleaned_data.get("shipping_address_zip")
        shipping_address_phone = form.cleaned_data.get("shipping_address_phone")

        email = form.cleaned_data.get("email")

        shipping_method = get_object_or_404(ShippingMethod, pk=shipping_method_id)

        order = create_order_from_cart(
            cart=cart,
            shipping_method=shipping_method,
            billing_address_full_name=billing_address_full_name,
            billing_address_address=billing_address_address,
            billing_address_town=billing_address_town,
            billing_address_state=billing_address_state,
            billing_address_country=billing_address_country,
            billing_address_zip=billing_address_zip,
            shipping_address_full_name=shipping_address_full_name,
            shipping_address_address=shipping_address_address,
            shipping_address_town=shipping_address_town,
            shipping_address_state=shipping_address_state,
            shipping_address_country=shipping_address_country,
            shipping_address_zip=shipping_address_zip,
            shipping_address_phone=shipping_address_phone,
            email=email,
        )

        return redirect(reverse("web:order", kwargs={"uuid": order.uuid}))


class OrderDetail(TemplateView):
    template_name = "web/order.html"

    def get_context_data(self, **kwargs):
        order = get_object_or_404(Order, uuid=kwargs.get("uuid"))

        redsys_client = RedsysClient()
        parameters = redsys_client.get_body_for_order(order)

        items = OrderLine.objects.select_related("product").filter(
            order=order, product__is_shipping_method=False
        )

        shipping_cost = OrderLine.objects.select_related("product").filter(
            order=order,
            product__is_shipping_method=True,
        ).aggregate(amount=Sum("total")).get("amount") or Decimal("0")

        base_total = OrderLine.objects.select_related("product").filter(
            order=order,
            product__is_shipping_method=False,
        ).aggregate(amount=Sum("base_total")).get("amount") or Decimal("0")

        tax_total = OrderLine.objects.select_related("product").filter(
            order=order,
            product__is_shipping_method=False,
        ).aggregate(amount=Sum("taxes")).get("amount") or Decimal("0")
        settings = WebSettings.load()

        return {
            "order": order,
            "items": items,
            "signature_version": parameters.get("Ds_SignatureVersion"),
            "merchant_parameters": parameters.get("Ds_MerchantParameters"),
            "signature": parameters.get("Ds_Signature"),
            "redsys_target_url": redsys_client.get_target_url(),
            "total": round(order.total, 2),
            "base_total": round(base_total, 2),
            "tax_total": round(tax_total, 2),
            "shipping_cost": round(shipping_cost, 2),
        }


class WishlistView(TemplateView):
    template_name = "web/wishlist.html"

    def get_context_data(self, **kwargs):
        settings = WebSettings.load()
        return {
            "title": settings.web_title,
            "description": settings.web_description,
        }


class OrdersView(TemplateView, FilteredQuerysetMixin, PaginatedQuerysetMixin):
    template_name = "web/orders.html"

    def get_queryset(self):
        return Order.objects.filter(user=self.request.user).exclude(
            status=Order.Statuses.STATUS_PENDING
        )

    def get_context_data(self, **kwargs):
        settings = WebSettings.load()
        qs = self.get_queryset()
        page = self.get_paginated_queryset(qs)

        return {
            "title": settings.web_title,
            "page": page,
            "has_next_page": page.has_next(),
            "has_previous_page": page.has_previous(),
        }


@require_http_methods(
    [
        "POST",
    ]
)
def add_cart_item(request, *args, **kwargs):
    product = get_object_or_404(Product, pk=request.POST.get("product"))
    cart, created = get_or_create_cart(request)
    response = HttpResponse(status=201, headers={"HX-Trigger": "updated-cart"})

    if created and request.user.is_anonymous:
        response.set_cookie(ANONYMOUS_CART_ID_COOKIE_NAME, cart.uuid)

    # Comprobamos si existe una línea de carrito para ese carrito de ese producto
    existing_cart_item = CartItem.objects.filter(cart=cart, product=product).first()

    # Si existe, simplemente le sumamos la cantidad a la línea ya existente
    if existing_cart_item is not None:
        existing_cart_item.quantity += int(request.POST.get("quantity"))
        existing_cart_item.save()
    # Si no, lo creamos
    else:
        CartItem.objects.create(
            cart=cart,
            quantity=request.POST.get("quantity"),
            product=product,
        )

    return response


@require_http_methods(
    [
        "POST",
    ]
)
def delete_cart_item(request, pk, *args, **kwargs):
    cart, created = get_or_create_cart(request)
    cart_item = get_object_or_404(CartItem, pk=pk, cart=cart)
    cart_item.delete()
    return HttpResponse(status=204, headers={"HX-Trigger": "updated-cart"})


@require_http_methods(
    [
        "POST",
    ]
)
def add_to_wishlist(request, *args, **kwargs):
    product = get_object_or_404(Product, pk=request.POST.get("product"))
    response = HttpResponse(status=201, headers={"HX-Trigger": "updated-wishlist"})

    if request.user.is_anonymous:
        return HttpResponse(status=400)

    WishlistedProduct.objects.get_or_create(
        user=request.user,
        product=product,
    )

    return response


@require_http_methods(
    [
        "POST",
    ]
)
def delete_from_wishlist(request, pk, *args, **kwargs):
    wishlisted_item = get_object_or_404(
        WishlistedProduct, product_id=pk, user=request.user
    )
    wishlisted_item.delete()
    return HttpResponse(status=204, headers={"HX-Trigger": "updated-wishlist"})


def manifest(request, *args, **kwargs):
    settings = WebSettings.load()

    data = {
        "name": settings.web_title,
        "short_name": settings.web_title,
        "start_url": "/",
        "background_color": settings.bg_color,
        "theme_color": settings.theme_color,
        "icons": [],
        "display": "standalone",
        "orientation": "portrait",
    }

    if settings.logo_240:
        data["icons"].append(
            {
                "src": settings.logo_240.url,
                "sizes": "240x240",
                "type": "image/png",
                "purpose": "maskable any",
            }
        )

    if settings.logo_128:
        data["icons"].append(
            {
                "src": settings.logo_128.url,
                "sizes": "240x240",
                "type": "image/png",
                "purpose": "maskable any",
            }
        )

    return JsonResponse(data)


index = IndexView.as_view()
category_view = CategoryView.as_view()
product_detail = ProductDetail.as_view()
cart_detail = CartDetail.as_view()
order_detail = OrderDetail.as_view()
wishlist = WishlistView.as_view()
orders = OrdersView.as_view()