from django.contrib.auth.models import User
from django.http import JsonResponse
from django.urls import reverse_lazy
from .models import Product, Manufacturer
from django.views import generic
from django.shortcuts import render
from django.contrib.auth.views import LogoutView
from django.views.generic import CreateView
from .forms import RegisterUserForm

class ProductDetailView(generic.DetailView):
    model = Product

class ProductListView(generic.ListView):
    model = Product

def index(request):
    num_product=Product.objects.all().count()
    num_manufacturer=Manufacturer.objects.count()
    return render(
        request,
        'index.html',
        context={'num_product':num_product, 'num_manufacturer':num_manufacturer},
    )


def login(request):
    return render(request, 'registration/login.html')


def registration(request):
    return render(request, 'registration.html')

def logout(request):
    return render(request, 'logout.html')


class RegisterView(CreateView):
    template_name = 'registration.html'
    form_class = RegisterUserForm
    success_url = reverse_lazy('login')


def validate_username(request):
    username = request.GET.get('username', None)
    response = {
        'is_taken': User.objects.filter(username__iexact=username).exists()
    }
    return JsonResponse(response)


class BBLogoutView(LogoutView):
    template_name = 'logout.html'
    success_url = reverse_lazy('index')