from django.shortcuts import render, get_object_or_404
from django.utils import timezone
from datetime import timedelta
from .models import *
from django.http import JsonResponse, HttpResponse
from django.template.loader import get_template
from weasyprint import HTML


# LISTING
def items (request, *args, **kwargs):
    context = {

    }
    return render(request, 'listing_pages/items.html', context) 


def orders (request, *args, **kwargs):
    context = {

    }
    return render(request, 'listing_pages/orders.html', context) 


def invoices (request, *args, **kwargs):
    invoices = Invoice.objects.all().order_by('-id')

    context = {
        'invoices': invoices,
    }

    return render(request, 'listing_pages/invoices.html', context) 




# ADD 
def add_product (request, *args, **kwargs):
    context = {

    }
    return render(request, 'add_templates/add-product.html', context) 


def add_service (request, *args, **kwargs):
    context = {

    }
    return render(request, 'add_templates/add-service.html', context) 


def add_order (request, *args, **kwargs):
    customers = CustomerProfile.objects.all().order_by('-id')

    context = {
        'customers': customers,
    }

    return render(request, 'add_templates/add-order.html', context) 



# TO FETCH THE ITEMS RELATED TO TH SELECTED CUSTOMER AND THE ITEMS THAT ARE NOT RELATED TO A CUSTOMER
def fetch_customer_items(request, customer_id):
    customer = get_object_or_404(CustomerProfile, id=customer_id)
    
    items_related_to_customer = Item.objects.filter(customer=customer)
    
    items_without_customer = Item.objects.filter(customer__isnull=True)
    
    data = {
        'items_related_to_customer': list(items_related_to_customer.values('id', 'title')),  
        'items_without_customer': list(items_without_customer.values('id', 'title')),  
    }

    return JsonResponse(data)




def fetch_invoice_details(request, invoice_id):
    invoice = get_object_or_404(Invoice, id=invoice_id)
    order = invoice.order
    order_items = OrderItem.objects.filter(order=order)

    order_total = order.get_cart_total

    data = {
        'invoice_number': invoice.invoice_number,
        'order_id': order.order_id,
        'order_total' : order_total,
        'date_created': invoice.date_created,
        'customer_first_name': order.customer.user.first_name,
        'customer_last_name': order.customer.user.last_name,
        'customer_email': order.customer.user.email,
        'order_items': list(order_items.values()),  # Convert QuerySet to list of dictionaries
    }

    return JsonResponse(data)



def invoice_details (request, invoice_id):
    invoice = get_object_or_404(Invoice, id=invoice_id)

    context = {
        'invoice' : invoice,
    }

    return render(request, 'invoice-details.html', context) 





def generate_pdf(request):
    template = get_template('invoice-details.html')
    context = {} 
    html_string = template.render(context)

    pdf = HTML(string=html_string).write_pdf()
    response = HttpResponse(pdf, content_type='application/pdf')
    response['Content-Disposition'] = 'attachment; filename="my_pdf.pdf"'
    return response