"""
This module defines views related to hosting packages.

"""
from __future__ import absolute_import, unicode_literals

from django.conf import settings
from django.http import Http404
from django.shortcuts import redirect, get_object_or_404
from django.utils.translation import ugettext as _
from django.views.generic import (
    DetailView,
    ListView,
)
from django.views.generic.edit import (
    CreateView,
    FormView,
)
from django.contrib import messages
from django.contrib.auth import get_user_model

from braces.views import (
    LoginRequiredMixin,
    StaffuserRequiredMixin,
)

from gvacommon.viewmixins import StaffOrSelfLoginRequiredMixin

from .forms import (
    AddDiskspaceOptionForm,
    AddMailboxOptionForm,
    AddUserDatabaseOptionForm,
    CreateCustomerHostingPackageForm,
    CreateHostingPackageForm,
)
from .models import (
    CustomerHostingPackage,
    DiskSpaceOption,
    MailboxOption,
    UserDatabaseOption,
)


class CreateHostingPackage(
    LoginRequiredMixin, StaffuserRequiredMixin, CreateView
):
    """
    Create a hosting package.

    """
    model = CustomerHostingPackage
    raise_exception = True
    template_name_suffix = '_create'
    form_class = CreateHostingPackageForm

    def form_valid(self, form):
        hostingpackage = form.save()
        messages.success(
            self.request,
            _('Started setup of new hosting package {name}.').format(
                name=hostingpackage.name)
        )
        return redirect(hostingpackage)


class CreateCustomerHostingPackage(CreateHostingPackage):
    """
    Create a hosting package for a selected customer.

    """
    form_class = CreateCustomerHostingPackageForm

    def get_form_kwargs(self):
        kwargs = super(CreateCustomerHostingPackage, self).get_form_kwargs()
        kwargs.update(self.kwargs)
        return kwargs

    def get_customer_object(self):
        return get_object_or_404(
            get_user_model(), username=self.kwargs['user'])

    def get_context_data(self, **kwargs):
        context = super(CreateCustomerHostingPackage, self).get_context_data(**kwargs)
        context['customer'] = self.get_customer_object()
        return context

    def form_valid(self, form):
        hostingpackage = form.save(commit=False)
        hostingpackage.customer = self.get_customer_object()
        hostingpackage.save()
        messages.success(
            self.request,
            _('Started setup of new hosting package {name}.').format(
                name=hostingpackage.name)
        )
        return redirect(hostingpackage)


class CustomerHostingPackageDetails(StaffOrSelfLoginRequiredMixin, DetailView):
    """
    This view is for showing details of a customer hosting package.

    """
    model = CustomerHostingPackage
    context_object_name = 'hostingpackage'
    customer = None

    def get_customer_object(self):
        if self.customer is None:
            self.customer = get_object_or_404(
                get_user_model(), username=self.kwargs['user'])
        return self.customer

    def get_context_data(self, **kwargs):
        context = super(CustomerHostingPackageDetails, self).get_context_data(
            **kwargs)
        context.update({
            'customer': self.get_customer_object(),
            'uploadserver': settings.OSUSER_UPLOAD_SERVER,
            'databases': context['hostingpackage'].databases,
            'osuser': context['hostingpackage'].osuser,
            'hostingoptions':
                context['hostingpackage'].get_hostingoptions(),
            'domains': context['hostingpackage'].domains.all(),
            'mailboxes': context['hostingpackage'].mailboxes,
        })
        context['sshkeys'] = context['osuser'].sshpublickey_set.all()
        return context


class AllCustomerHostingPackageList(
    LoginRequiredMixin, StaffuserRequiredMixin, ListView
):
    """
    This view is used for showing a list of all hosting packages.

    """
    model = CustomerHostingPackage
    template_name_suffix = '_admin_list'


class CustomerHostingPackageList(StaffOrSelfLoginRequiredMixin, ListView):
    """
    This view is used for showing a list of a customer's hosting packages.

    """
    model = CustomerHostingPackage
    customer = None

    def get_customer_object(self):
        if self.customer is None:
            self.customer = get_object_or_404(
                get_user_model(), username=self.kwargs['user'])
        return self.customer

    def get_context_data(self, **kwargs):
        context = super(CustomerHostingPackageList, self).get_context_data(
            **kwargs)
        context['customer'] = self.get_customer_object()
        return context

    def get_queryset(self):
        return super(CustomerHostingPackageList, self).get_queryset().filter(
            customer__username=self.kwargs['user'])


class HostingOptionChoices(
    LoginRequiredMixin, StaffuserRequiredMixin, DetailView
):
    """
    This view displays choices of hosting options for a customer hosting
    package.

    """
    model = CustomerHostingPackage
    context_object_name = 'hostingpackage'
    template_name_suffix = '_option_choices'

    def get_context_data(self, **kwargs):
        context = super(HostingOptionChoices, self).get_context_data(
            **kwargs)
        context.update({
            'customer': self.get_object().customer,
            'hosting_options': (
                (_('Disk space'),
                 [(option, 'diskspace') for option in
                  DiskSpaceOption.objects.all()]),
                (_('Mailboxes'),
                 [(option, 'mailboxes') for option in
                  MailboxOption.objects.all()]),
                (_('Databases'),
                 [(option, 'databases') for option in
                  UserDatabaseOption.objects.all()]),
            ),
        })
        return context


class AddHostingOption(
    LoginRequiredMixin, StaffuserRequiredMixin, FormView
):
    template_name = 'hostingpackages/add_hosting_option.html'

    def get_form_class(self):
        optiontype = self.kwargs['type']
        if optiontype == 'diskspace':
            return AddDiskspaceOptionForm
        elif optiontype == 'mailboxes':
            return AddMailboxOptionForm
        elif optiontype == 'databases':
            return AddUserDatabaseOptionForm
        raise Http404()

    def get_hosting_package(self):
        return get_object_or_404(
            CustomerHostingPackage, pk=int(self.kwargs['package']))

    def get_option_template(self):
        optiontype = self.kwargs['type']
        optionid = int(self.kwargs['optionid'])
        if optiontype == 'diskspace':
            return get_object_or_404(DiskSpaceOption, pk=optionid)
        elif optiontype == 'mailboxes':
            return get_object_or_404(MailboxOption, pk=optionid)
        elif optiontype == 'databases':
            return get_object_or_404(UserDatabaseOption, pk=optionid)
        raise Http404()

    def get_form_kwargs(self):
        kwargs = super(AddHostingOption, self).get_form_kwargs()
        kwargs['hostingpackage'] = self.get_hosting_package()
        kwargs['option_template'] = self.get_option_template()
        return kwargs

    def get_initial(self):
        initial = super(AddHostingOption, self).get_initial()
        template = self.get_option_template()
        if type(template) == DiskSpaceOption:
            initial.update({
                'diskspace': template.diskspace,
                'diskspace_unit': template.diskspace_unit,
            })
        elif type(template) == MailboxOption:
            initial['number'] = template.number
        elif type(template) == UserDatabaseOption:
            initial['number'] = template.number
        else:
            raise Http404()
        return initial

    def get_context_data(self, **kwargs):
        context = super(AddHostingOption, self).get_context_data(**kwargs)
        context['option_template'] = self.get_option_template()
        return context

    def form_valid(self, form):
        option = form.save()
        hosting_package = self.get_hosting_package()
        messages.success(
            self.request,
            _("Successfully added option {option} to hosting package "
              "{package}.").format(
                  option=option, package=hosting_package.name)
        )
        return redirect(hosting_package)