from django.shortcuts import get_object_or_404, render,render_to_response
from django.core.urlresolvers import reverse_lazy, reverse
from django.contrib.auth.mixins import LoginRequiredMixin

from django.views.generic import View, CreateView, FormView, ListView, DetailView, UpdateView, DeleteView
from django.http import HttpResponseRedirect, HttpResponse
from django.contrib.auth import authenticate, login
from django.conf import settings
from django.contrib import messages

from membership.models import CustomUser, StripeCustomer
from utils.stripe_utils import StripeUtils
from utils.forms import BillingAddressForm
from utils.models import BillingAddress
from .models import VirtualMachineType, VirtualMachinePlan, HostingOrder
from .forms import HostingUserSignupForm, HostingUserLoginForm
from .mixins import ProcessVMSelectionMixin


class DjangoHostingView(ProcessVMSelectionMixin, View):
    template_name = "hosting/django.html"

    def get_context_data(self, **kwargs):
        context = {
            'hosting': "django",
            'hosting_long': "Django",
            'domain': "django-hosting.ch",
            'google_analytics': "UA-62285904-6",
            'email': "info@django-hosting.ch",
            'vm_types': VirtualMachineType.get_serialized_vm_types(),
        }

        return context

    def get(self, request, *args, **kwargs):
        request.session['hosting_url'] = reverse('hosting:djangohosting')
        context = self.get_context_data()

        return render(request, self.template_name, context)


class RailsHostingView(ProcessVMSelectionMixin, View):
    template_name = "hosting/rails.html"

    def get_context_data(self, **kwargs):
        context = {
            'hosting': "rails",
            'hosting_long': "Ruby On Rails",
            'domain': "rails-hosting.ch",
            'google_analytics': "UA-62285904-5",
            'email': "info@rails-hosting.ch",
            'vm_types': VirtualMachineType.get_serialized_vm_types(),
        }
        return context

    def get(self, request, *args, **kwargs):
        request.session['hosting_url'] = reverse('hosting:railshosting')
        context = self.get_context_data()
        return render(request, self.template_name, context)


class NodeJSHostingView(ProcessVMSelectionMixin, View):
    template_name = "hosting/nodejs.html"

    def get_context_data(self, **kwargs):
        context = {
            'hosting': "nodejs",
            'hosting_long': "NodeJS",
            'domain': "node-hosting.ch",
            'google_analytics': "UA-62285904-7",
            'email': "info@node-hosting.ch",
            'vm_types': VirtualMachineType.get_serialized_vm_types(),
        }
        return context

    def get(self, request, *args, **kwargs):
        request.session['hosting_url'] = reverse('hosting:nodejshosting')
        context = self.get_context_data()

        return render(request, self.template_name, context)


class IndexView(View):
    template_name = "hosting/index.html"

    def get_context_data(self, **kwargs):
        context = {
            'hosting': "nodejs",
            'hosting_long': "NodeJS",
            'domain': "node-hosting.ch",
            'google_analytics': "UA-62285904-7",
            'email': "info@node-hosting.ch",
            'vm_types': VirtualMachineType.get_serialized_vm_types(),
        }
        return context

    def get(self, request, *args, **kwargs):

        context = self.get_context_data()

        return render(request, self.template_name, context)


class LoginView(FormView):
    template_name = 'hosting/login.html'
    success_url = reverse_lazy('hosting:orders')
    form_class = HostingUserLoginForm
    moodel = CustomUser

    def get_success_url(self):
        next_url = self.request.session.get('next', self.success_url)
        return next_url

    def form_valid(self, form):
        email = form.cleaned_data.get('email')
        password = form.cleaned_data.get('password')
        auth_user = authenticate(email=email, password=password)

        if auth_user:
            login(self.request, auth_user)
            return HttpResponseRedirect(self.get_success_url())

        return HttpResponseRedirect(self.get_success_url())


class SignupView(CreateView):
    template_name = 'hosting/signup.html'
    form_class = HostingUserSignupForm
    model = CustomUser

    def get_success_url(self):
        next_url = self.request.session.get('next', reverse_lazy('hosting:signup'))
        return next_url

    def form_valid(self, form):
        name = form.cleaned_data.get('name')
        email = form.cleaned_data.get('email')
        password = form.cleaned_data.get('password')

        CustomUser.register(name, password, email)
        auth_user = authenticate(email=email, password=password)
        login(self.request, auth_user)

        return HttpResponseRedirect(self.get_success_url())


class GenerateVMSSHKeysView(LoginRequiredMixin, DetailView):
    model = VirtualMachinePlan
    template_name = 'hosting/virtual_machine_key.html'
    success_url = reverse_lazy('hosting:orders')
    context_object_name = "virtual_machine"

    def get_context_data(self, **kwargs):

        context = super(GenerateVMSSHKeysView, self).get_context_data(**kwargs)
        vm = self.get_object()
        if not vm.public_key:
            private_key = vm.generate_keys()
            context.update({
                'private_key': private_key
            })
            return context
        return context


class PaymentVMView(LoginRequiredMixin, FormView):
    template_name = 'hosting/payment.html'
    login_url = reverse_lazy('hosting:login')
    form_class = BillingAddressForm

    def get_context_data(self, **kwargs):
        context = super(PaymentVMView, self).get_context_data(**kwargs)
        context.update({
            'stripe_key': settings.STRIPE_API_PUBLIC_KEY
        })
        return context

    def post(self, request, *args, **kwargs):
        form = self.get_form()

        if form.is_valid():
            context = self.get_context_data()
            specifications = request.session.get('vm_specs')
            vm_type = specifications.get('hosting_company')
            vm = VirtualMachineType.objects.get(hosting_company=vm_type)
            final_price = vm.calculate_price(specifications)

            plan_data = {
                'vm_type': vm,
                'cores': specifications.get('cores'),
                'memory': specifications.get('memory'),
                'disk_size': specifications.get('disk_size'),
                'price': final_price
            }
            token = form.cleaned_data.get('token')

            # Get or create stripe customer
            customer = StripeCustomer.get_or_create(email=self.request.user.email,
                                                    token=token)
            if not customer:
                form.add_error("__all__","Invalid credit card")
                return self.render_to_response(self.get_context_data(form=form))

            # Create Virtual Machine Plan
            plan = VirtualMachinePlan.create(plan_data, request.user)

            # Create Billing Address
            billing_address = form.save()

            # Create a Hosting Order
            order = HostingOrder.create(vm_plan=plan, customer=customer,
                                        billing_address=billing_address)

            # Make stripe charge to a customer
            stripe_utils = StripeUtils()
            charge_response = stripe_utils.make_charge(amount=final_price,
                                                       customer=customer.stripe_id)
            charge = charge_response.get('response_object')

            # Check if the payment was approved
            if not charge:
                context.update({
                    'paymentError': charge_response.get('error'),
                    'form': form
                })
                return render(request, self.template_name, context)

            charge = charge_response.get('response_object')

            # Associate an order with a stripe payment
            order.set_stripe_charge(charge)

            # If the Stripe payment was successed, set order status approved
            order.set_approved()
            request.session.update({
                'charge': charge,
                'order': order.id,
                'billing_address': billing_address.id
            })
            return HttpResponseRedirect(reverse('hosting:orders', kwargs={'pk': order.id}))
        else:
            return self.form_invalid(form)


class OrdersHostingDetailView(LoginRequiredMixin, DetailView):
    template_name = "hosting/order_detail.html"
    context_object_name = "order"
    login_url = reverse_lazy('hosting:login')
    model = HostingOrder


class OrdersHostingListView(LoginRequiredMixin, ListView):
    template_name = "hosting/orders.html"
    login_url = reverse_lazy('hosting:login')
    context_object_name = "orders"
    model = HostingOrder
    paginate_by = 10
    ordering = '-id'

    def get_queryset(self):
        user = self.request.user
        self.queryset = HostingOrder.objects.filter(customer__user=user)
        return super(OrdersHostingListView, self).get_queryset()


class OrdersHostingDeleteView(LoginRequiredMixin, DeleteView):
    login_url=reverse_lazy('hosting:login')
    success_url = reverse_lazy('hosting:orders')
    model = HostingOrder

class VirtualMachinesPlanListView(LoginRequiredMixin, ListView):
    template_name = "hosting/virtual_machines.html"
    login_url = reverse_lazy('hosting:login')
    context_object_name = "vms"
    model = VirtualMachinePlan
    paginate_by = 10
    ordering = '-id'

    def get_queryset(self):
        user = self.request.user
        self.queryset = VirtualMachinePlan.objects.active(user)
        return super(VirtualMachinesPlanListView, self).get_queryset()


class VirtualMachineDetailView(LoginRequiredMixin, DetailView):
    template_name = "hosting/virtual_machine_detail.html"
    login_url = reverse_lazy('hosting:login')
    model = VirtualMachinePlan
    context_object_name = "virtual_machine"