from django.views.generic import ListView,  CreateView, UpdateView, DeleteView, DetailView
from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
from Movement.Forms import FormsProduct
from Movement import models
from Client.models import Client
from django.urls import reverse_lazy
from django.contrib import messages


class ProductCreateCustomView(LoginRequiredMixin, PermissionRequiredMixin, CreateView):
    model = models.Product
    template_name = 'Product/Create/index.html'
    form_class = FormsProduct.FormsProduct
    success_url = reverse_lazy('MovProductListView')
    permission_required = 'Base.add_'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        # if self.request.GET.get('Client'):
        #     filter_client = Client.objects.filter(
        #         id=self.request.GET.get('Client') or ''
        #     )
        # else: filter_client = Client.objects.none()
        # context['Client'] = filter_client
        return context

    def get_form(self, form_class=None):
        form = super().get_form(form_class)
        client_id = self.request.GET.get('Client') or self.request.POST.get('client')
        if client_id:
            filter_client = Client.objects.filter(id=client_id)
        else:
            filter_client = Client.objects.none()
        form.fields['client'].queryset = filter_client.all()
        return form

    def form_valid(self, form):
        gross_value = form.instance.product.value
        quantity = form.instance.quantity
        net_value = gross_value - ((gross_value * form.instance.pay_method.percentage) / 100)
        form.instance.gross_value = gross_value * quantity
        form.instance.net_value = net_value * quantity
        form.instance.created_by = self.request.user
        messages.success(self.request, 'Registro realizado com sucesso!')
        return super().form_valid(form)

    def form_invalid(self, form):
        errors = form.errors.as_text()
        messages.error(self.request, f'Verifique os dados: {errors}')
        return super().form_invalid(form)