from django.contrib import messages
from django.db.models import Count, Q
from django.shortcuts import get_object_or_404, redirect, render
from django.urls import reverse

from .forms import PaymentConfirmationForm
from .models import PaymentConfirmation, Product, ProductCategory

WHATSAPP_NUMBER = "5359177041"
BUSINESS_NAME = "Flores Software Ideas"


def _base_context(**extra):
    context = {
        "project_name": BUSINESS_NAME,
        "project_description": "Flores Software Ideas ofrece soluciones tecnológicas, software empresarial y pagos por QR, Transfermóvil y Enzona.",
        "whatsapp_number": WHATSAPP_NUMBER,
    }
    context.update(extra)
    return context


def home(request):
    categories = ProductCategory.objects.filter(is_active=True).annotate(
        active_products=Count("products", filter=Q(products__is_active=True))
    )
    featured_products = Product.objects.filter(is_active=True, is_featured=True).select_related("category")[:6]
    recent_confirmations = PaymentConfirmation.objects.filter(status=PaymentConfirmation.STATUS_PENDING).count()
    payment_form = PaymentConfirmationForm()

    return render(
        request,
        "core/index.html",
        _base_context(
            categories=categories,
            featured_products=featured_products,
            payment_form=payment_form,
            pending_payments=recent_confirmations,
            page_title="Tienda virtual de soluciones tecnológicas",
            meta_description="Compra o cotiza software empresarial, hardware, desarrollo web, apps móviles y soporte técnico con pagos por QR, Transfermóvil o Enzona.",
        ),
    )


def catalog(request):
    category_slug = request.GET.get("categoria")
    categories = ProductCategory.objects.filter(is_active=True)
    products = Product.objects.filter(is_active=True).select_related("category")
    selected_category = None
    if category_slug:
        selected_category = get_object_or_404(ProductCategory, slug=category_slug, is_active=True)
        products = products.filter(category=selected_category)

    return render(
        request,
        "core/catalog.html",
        _base_context(
            categories=categories,
            products=products,
            selected_category=selected_category,
            page_title="Catálogo tecnológico",
            meta_description="Explora productos y servicios tecnológicos listos para cotizar y pagar en línea.",
        ),
    )


def product_detail(request, slug):
    product = get_object_or_404(Product.objects.select_related("category"), slug=slug, is_active=True)
    related_products = Product.objects.filter(is_active=True, category=product.category).exclude(pk=product.pk)[:3]
    payment_form = PaymentConfirmationForm(initial={"product": product, "amount": product.price_from})
    return render(
        request,
        "core/product_detail.html",
        _base_context(
            product=product,
            related_products=related_products,
            payment_form=payment_form,
            page_title=product.name,
            meta_description=product.short_description,
        ),
    )


def confirm_payment(request):
    initial = {}
    product_slug = request.GET.get("producto")
    if product_slug:
        product = get_object_or_404(Product, slug=product_slug, is_active=True)
        initial = {"product": product, "amount": product.price_from}

    if request.method == "POST":
        form = PaymentConfirmationForm(request.POST, request.FILES)
        if form.is_valid():
            confirmation = form.save()
            messages.success(request, "Tu confirmación fue enviada. Un administrador revisará el pago en el panel.")
            return redirect("payment_success", pk=confirmation.pk)
    else:
        form = PaymentConfirmationForm(initial=initial)

    return render(
        request,
        "core/confirm_payment.html",
        _base_context(
            form=form,
            page_title="Confirmar pago",
            meta_description="Reporta tu pago por QR, Transfermóvil, Enzona o transferencia para revisión manual del administrador.",
        ),
    )


def payment_success(request, pk):
    confirmation = get_object_or_404(PaymentConfirmation.objects.select_related("product"), pk=pk)
    return render(
        request,
        "core/payment_success.html",
        _base_context(
            confirmation=confirmation,
            page_title="Pago recibido para revisión",
            meta_description="Confirmación de pago recibida y pendiente de aprobación manual.",
        ),
    )