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 TemplateView, CreateView

from shop.models import (
    CartItem,
    Product,
    ProductCategory,
    WishlistedProduct,
    CustomerAddress,
    ShippingMethod,
)
from shop.utils import create_order_from_cart
from web.forms import CreateOrderForm
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,
            "web_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": settings.web_title,
            "web_title": settings.web_title,
            "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": product.name,
            "web_title": settings.web_title,
            "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 {
            "cart": cart,
            "items": cart_items,
            "title": web_settings.web_title,
            "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)

        billing_address_id = form.cleaned_data.get("billing_address")
        shipping_address_id = form.cleaned_data.get("shipping_address")
        shipping_method_id = form.cleaned_data.get("shipping_method")

        cart, created = get_or_create_cart(request)

        billing_address = get_object_or_404(CustomerAddress, pk=billing_address_id)
        shipping_address = get_object_or_404(CustomerAddress, pk=shipping_address_id)
        shipping_method = get_object_or_404(ShippingMethod, pk=shipping_method_id)

        order = create_order_from_cart(
            cart=cart,
            billing_address=billing_address,
            shipping_address=shipping_address,
            shipping_method=shipping_method,
        )

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


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

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


@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()
wishlist = WishlistView.as_view()