from collections import namedtuple

from django.shortcuts import render
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,\
    DeleteView, TemplateView, UpdateView
from django.http import HttpResponseRedirect
from django.contrib.auth import authenticate, login
from django.contrib import messages
from django.conf import settings
from django.shortcuts import redirect


from guardian.mixins import PermissionRequiredMixin
from stored_messages.settings import stored_messages_settings
from stored_messages.models import Message
from stored_messages.api import mark_read



from membership.models import CustomUser, StripeCustomer
from utils.stripe_utils import StripeUtils
from utils.forms import BillingAddressForm, PasswordResetRequestForm
from utils.views import PasswordResetViewMixin, PasswordResetConfirmViewMixin, LoginViewMixin
from utils.mailer import BaseEmail
from .models import VirtualMachineType, VirtualMachinePlan, HostingOrder, HostingBill, UserHostingKey
from .forms import HostingUserSignupForm, HostingUserLoginForm, UserHostingKeyForm
from .mixins import ProcessVMSelectionMixin
from .opennebula_functions import HostingManageVMAdmin

from oca.exceptions import OpenNebulaException
from oca.pool import WrongNameError


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

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

        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):
        HOSTING = 'rails'
        configuration_detail = dict(VirtualMachinePlan.VM_CONFIGURATION).get(HOSTING)
        context = {
            'hosting': HOSTING,
            'configuration_detail': configuration_detail,
            '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):
        HOSTING = 'nodejs'
        configuration_detail = dict(VirtualMachinePlan.VM_CONFIGURATION).get(HOSTING)
        context = {
            'hosting': "nodejs",
            'hosting_long': "NodeJS",
            'configuration_detail': configuration_detail,
            '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 HostingPricingView(ProcessVMSelectionMixin, View):
    template_name = "hosting/hosting_pricing.html"

    def get_context_data(self, **kwargs):
        configuration_options = dict(VirtualMachinePlan.VM_CONFIGURATION)
        context = {
            'configuration_options': configuration_options,
            '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 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(LoginViewMixin):
    template_name = "hosting/login.html"
    form_class = HostingUserLoginForm
    success_url = reverse_lazy('hosting:orders')


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 PasswordResetView(PasswordResetViewMixin):
    template_name = 'hosting/reset_password.html'
    form_class = PasswordResetRequestForm
    success_url = reverse_lazy('hosting:login')
    template_email_path = 'hosting/emails/'


class PasswordResetConfirmView(PasswordResetConfirmViewMixin):
    template_name = 'hosting/confirm_reset_password.html'
    success_url = reverse_lazy('hosting:login')


class NotificationsView(LoginRequiredMixin, TemplateView):
    template_name = 'hosting/notifications.html'
    login_url = reverse_lazy('hosting:login')

    def get_context_data(self, **kwargs):
        context = super(NotificationsView, self).get_context_data(**kwargs)
        backend = stored_messages_settings.STORAGE_BACKEND()
        unread_notifications = backend.inbox_list(self.request.user)
        read_notifications = backend.archive_list(self.request.user)
        context.update({
            'unread_notifications': unread_notifications,
            'all_notifications': read_notifications + unread_notifications
        })
        return context


class MarkAsReadNotificationView(LoginRequiredMixin, UpdateView):
    model = Message
    success_url = reverse_lazy('hosting:notifications')
    login_url = reverse_lazy('hosting:login')
    fields = '__all__'

    def post(self, *args, **kwargs):
        message = self.get_object()
        backend = stored_messages_settings.STORAGE_BACKEND()
        backend.archive_store([self.request.user], message)
        mark_read(self.request.user, message)
        return HttpResponseRedirect(reverse('hosting:notifications'))


class GenerateVMSSHKeysView(LoginRequiredMixin, FormView):
    form_class = UserHostingKeyForm
    model = UserHostingKey
    template_name = 'hosting/virtual_machine_key.html'
    success_url = reverse_lazy('hosting:orders')
    login_url = reverse_lazy('hosting:login')
    context_object_name = "virtual_machine"

    def get_context_data(self, **kwargs):
        try:
            user_key = UserHostingKey.objects.get(
                user=self.request.user
            )
        except UserHostingKey.DoesNotExist:
            user_key = None

        context = super(
            GenerateVMSSHKeysView,
            self
        ).get_context_data(**kwargs)

        context.update({
            'user_key': user_key
        })

        return context

    def get_form_kwargs(self):
        kwargs = super(GenerateVMSSHKeysView, self).get_form_kwargs()
        kwargs.update({'request': self.request})
        return kwargs

    def form_valid(self, form):
        form.save()
        context = self.get_context_data()

        if form.cleaned_data.get('private_key'):
            context.update({
                'private_key': form.cleaned_data.get('private_key'),
                'key_name': form.cleaned_data.get('name')
            })

        # print("form", form.cleaned_data)

        return render(self.request, self.template_name, 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_template = specifications.get('vm_template', 1)

            vm_type = VirtualMachineType.objects.get(id=vm_template)

            specs = vm_type.get_specs()

            final_price = vm_type.calculate_price()

            plan_data = {
                'vm_type': vm_type,
                'configuration': specifications.get(
                    'configuration',
                    'django'
                ),
                'price': final_price
            }

            plan_data.update(specs)

            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()

            # Create VM using oppenebula functions 
            # _request = namedtuple('request', 'POST user')
            # _request.user = request.user
            # user = namedtuple('user', 'email')
            # email 
            # _request.POST = {
                # 'vm_template': vm_template
            # }

            hosting_admin = HostingManageVMAdmin.__new__(HostingManageVMAdmin)
            hosting_admin.init_opennebula_client(request)
            oppennebula_vm_id = hosting_admin.create_vm_view(vm_type.get_specs())
            plan.oppenebula_id = oppennebula_vm_id

            # Send notification to ungleich as soon as VM has been booked
            context = {
                'vm': plan,
                'order': order,
                'base_url': "{0}://{1}".format(request.scheme, request.get_host())

            }
            email_data = {
                'subject': 'New VM request',
                'to': request.user.email,
                'context': context,
                'template_name': 'new_booked_vm',
                'template_path': 'hosting/emails/'
            }
            email = BaseEmail(**email_data)
            email.send()

            return HttpResponseRedirect(reverse('hosting:orders', kwargs={'pk': order.id}))
        else:
            return self.form_invalid(form)


class OrdersHostingDetailView(PermissionRequiredMixin, LoginRequiredMixin, DetailView):
    template_name = "hosting/order_detail.html"
    context_object_name = "order"
    login_url = reverse_lazy('hosting:login')
    permission_required = ['view_hostingorder']
    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):
        # hosting_admin = HostingManageVMAdmin.__new__(HostingManageVMAdmin)
        # print(hosting_admin.show_vms_view(self.request))
        print(VirtualMachinePlan.get_vms(self.request.user.email))
        user = self.request.user
        self.queryset = VirtualMachinePlan.objects.active(user)
        return super(VirtualMachinesPlanListView, self).get_queryset()


class CreateVirtualMachinesView(LoginRequiredMixin, View):
    template_name = "hosting/create_virtual_machine.html"
    login_url = reverse_lazy('hosting:login')

    def get(self, request, *args, **kwargs):
        context = {
            'vm_types': VirtualMachineType.get_serialized_vm_types(),
            'configuration_options': VirtualMachinePlan.VM_CONFIGURATION
        }
        # context = {}
        return render(request, self.template_name, context)

    def post(self, request):
        configuration = request.POST.get('configuration')
        configuration_display = dict(VirtualMachinePlan.VM_CONFIGURATION).get(configuration)
        vm_template = request.POST.get('vm_template')
        vm_type = VirtualMachineType.objects.get(id=vm_template)
        vm_specs = vm_type.get_specs()
        vm_specs.update({
            'configuration_display': configuration_display,
            'configuration': configuration,
            'final_price': vm_type.final_price,
            'vm_template': vm_template
        })
        request.session['vm_specs'] = vm_specs
        return redirect(reverse('hosting:payment'))

    # def get_queryset(self):
    #     # hosting_admin = HostingManageVMAdmin.__new__(HostingManageVMAdmin)
    #     # print(hosting_admin.show_vms(self.request))
    #     user = self.request.user
    #     self.queryset = VirtualMachinePlan.objects.active(user)
    #     return super(VirtualMachinesPlanListView, self).get_queryset()


class VirtualMachineView(PermissionRequiredMixin, LoginRequiredMixin, UpdateView):
    template_name = "hosting/virtual_machine_detail.html"
    login_url = reverse_lazy('hosting:login')
    model = VirtualMachinePlan
    context_object_name = "virtual_machine"
    permission_required = ['view_virtualmachineplan', 'cancel_virtualmachineplan']
    fields = '__all__'

    def get_success_url(self):
        vm = self.get_object()
        final_url = "%s%s" % (reverse('hosting:virtual_machines', kwargs={'pk': vm.id}),
                              '#status-v')
        return final_url

    def post(self, *args, **kwargs):
        vm = self.get_object()
        vm.cancel_plan()

        context = {
            'vm': vm,
            'base_url': "{0}://{1}".format(self.request.scheme, self.request.get_host())
        }
        email_data = {
            'subject': 'Virtual machine plan canceled',
            'to': self.request.user.email,
            'context': context,
            'template_name': 'vm_status_changed',
            'template_path': 'hosting/emails/'
        }
        email = BaseEmail(**email_data)
        email.send()

        return HttpResponseRedirect(self.get_success_url())

class HostingBillListView(LoginRequiredMixin, ListView):
    template_name = "hosting/bills.html"
    login_url = reverse_lazy('hosting:login')
    context_object_name = "users"
    model = StripeCustomer
    paginate_by = 10
    ordering = '-id'
    #TODO show only clients i.e. get_query_set

class HostingBillDetailView(PermissionRequiredMixin, LoginRequiredMixin, DetailView):
    template_name = "hosting/bill_detail.html"
    login_url = reverse_lazy('hosting:login')
    permission_required = ['view_hostingview']
    context_object_name = "bill"
    model = HostingBill

    def get_object(self, queryset=None):
        #Get HostingBill for primary key (Select from customer users)
        pk = self.kwargs['pk']
        object = HostingBill.objects.filter(customer__id=pk).first()
        if object is None:
            self.template_name = 'hosting/bill_error.html'
        return object

    def get_context_data(self, **kwargs):
        # Get context
        context = super(DetailView, self).get_context_data(**kwargs)
        # Get vms
        try:
            context['vms'] = self.get_object().get_vms()
        except:
            pass

        return context