# This file is part of dnmgmt, a number resource management system
# Licensed under GNU General Public License v3 or later
# Written by Sebastian Lohff (seba@someserver.de)

from django.shortcuts import render, get_object_or_404
from django.db.models import Q
from django.contrib.auth.decorators import login_required
from django.http import HttpResponseRedirect, Http404
from django.urls import reverse, reverse_lazy
from django.views.generic import DetailView, CreateView, UpdateView
from django.contrib.auth.mixins import LoginRequiredMixin
from django.contrib import messages
from formtools.wizard.views import SessionWizardView

from .models import Maintainer, Contact, InetNum, ASBlock, ASNumber
from .forms import MntForm, MntInitialForm, ContactForm, ContactInitialForm, InetNumForm, ASBlockForm, ASNumberForm
from .generic import DeleteCheckView, MntGenericMixin
from .helpers import findInDatabase


@login_required
def createObjectOverview(request):
    mnts = request.user.maintainer_set.filter().all()
    netblocks = InetNum.objects.filter(Q(mnt_by__in=mnts) | Q(mnt_lower__in=mnts)).distinct()
    asblocks = ASBlock.objects.filter(Q(mnt_by__in=mnts) | Q(mnt_lower__in=mnts)).distinct()

    return render(request, "whoisdb/create_overview.html", {"netblocks": netblocks, "asblocks": asblocks})


@login_required
def dbDashboard(request):
    mnts = request.user.maintainer_set.filter(rir=False, lir=False).all()
    if request.GET.get("delegated", None) or mnts.count() == 0:
        # if user wants to see rir/lir objects or only has rir/lir mnts, use all available mnts
        mnts = request.user.maintainer_set.all()
        showDelegations = True
    else:
        showDelegations = False

    hasDelegations = request.user.maintainer_set.filter(Q(rir=True) | Q(lir=True)).count() > 0

    contacts = Contact.objects.filter(mnt_by__in=mnts)
    netblocks = InetNum.objects.filter(Q(mnt_by__in=mnts) | Q(mnt_lower__in=mnts)).distinct()
    asblocks = ASBlock.objects.filter(Q(mnt_by__in=mnts) | Q(mnt_lower__in=mnts)).distinct()
    asnumbers = ASNumber.objects.filter(Q(mnt_by__in=mnts) | Q(mnt_lower__in=mnts)).distinct()
    mntForm = contactForm = None

    if mnts.count() == 0:
        mntForm = contactForm = None
        if request.method == "POST":
            mntForm = MntInitialForm(user=request.user, data=request.POST, prefix="mnt")
            contactForm = ContactInitialForm(user=request.user, data=request.POST, prefix="contact")
            if mntForm.is_valid() and contactForm.is_valid():
                mnt = mntForm.save(commit=False)
                mnt.handleAuto(request.user.username)
                mnt.save()

                contact = contactForm.save(commit=False)
                contact.handleAuto()
                contact.type = Contact.TYPE_PERSON
                contact.save()
                contact.mnt_by.add(mnt.id)
                contact.save()

                mnt.auth.add(request.user.id)
                mnt.admin_c.add(contact.id)
                mnt.save()

                return HttpResponseRedirect(reverse("whoisdb:dashboard"))
        else:
            mntForm = MntInitialForm(user=request.user, prefix="mnt", initial={'handle': 'AUTO', 'description': 'Primary maintainer of %s' % request.user.username})
            contactForm = ContactInitialForm(user=request.user, initial={'handle': 'AUTO', 'name': request.user.username.capitalize()}, prefix='contact')

    return render(request, "whoisdb/overview.html", {"mnts": mnts, "contacts": contacts, "mntForm": mntForm, "contactForm": contactForm, "netblocks": netblocks, "asblocks": asblocks, "asnumbers": asnumbers, 'hasDelegations': hasDelegations, "showDelegations": showDelegations})


def showHandle(request, handle):
    # a) find handle
    models = [Contact, Maintainer, ASBlock, ASNumber, InetNum]
    obj = None

    for model in models:
        if handle.endswith(model.handleSuffix):
            obj = get_object_or_404(model, handle=handle)
            break

    if not obj:
        raise Http404("Handle object not found")

    return render(request, "whoisdb/handle_show.html", {"object": obj})


def searchObject(request):
    results = None
    term = request.GET.get("q", None)
    if term:
        results = findInDatabase(term)
    return render(request, "whoisdb/search.html", {"results": results, "term": term})


class MaintainerCreate(LoginRequiredMixin, CreateView):
    template_name = "whoisdb/obj_create.html"
    form_class = MntForm

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(MaintainerCreate, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        kwargs["initial"] = {
            "handle": "AUTO",
            #"auth": self.request.user.username,
        }

        return kwargs

    def form_valid(self, form):
        self.object = form.save(commit=False)
        self.object.handleAuto(self.request.user.username)
        self.object.save()
        self.object.auth.add(self.request.user)
        self.object.save()

        return super(MaintainerCreate, self).form_valid(form)


class MaintainerEdit(LoginRequiredMixin, UpdateView):
    template_name = "whoisdb/obj_edit.html"
    model = Maintainer
    form_class = MntForm
    slug_field = "handle"
    slug_url_kwarg = "handle"

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(MaintainerEdit, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        return kwargs

    def get_queryset(self):
        return self.model.objects.filter(auth=self.request.user)


class MaintainerDelete(LoginRequiredMixin, DeleteCheckView):
    template_name = "whoisdb/obj_delete.html"
    model = Maintainer
    slug_field = "handle"
    slug_url_kwarg = "handle"
    success_url = reverse_lazy("whoisdb:dashboard")

    def get_queryset(self):
        return self.model.objects.filter(auth=self.request.user)


class MaintainerDetail(LoginRequiredMixin, DetailView):
    template_name = "whoisdb/handle_show.html"
    model = Maintainer
    slug_field = "handle"
    slug_url_kwarg = "handle"
    #context_object_name = "mnt"


class ContactDetail(DetailView):
    model = Contact
    slug_field = "handle"
    slug_url_kwarg = "handle"
    context_object_name = "contact"


class ContactEdit(MntGenericMixin, LoginRequiredMixin, UpdateView):
    template_name = "whoisdb/obj_edit.html"
    model = Contact
    form_class = ContactForm
    slug_field = "handle"
    slug_url_kwarg = "handle"

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(ContactEdit, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        return kwargs


class ContactCreate(LoginRequiredMixin, CreateView):
    template_name = "whoisdb/obj_create.html"
    form_class = ContactForm

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(ContactCreate, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        kwargs["initial"] = {
            "handle": "AUTO",
            "type": Contact.TYPE_PERSON
        }
        return kwargs


class ContactDelete(MntGenericMixin, LoginRequiredMixin, DeleteCheckView):
    template_name = "whoisdb/obj_delete.html"
    model = Contact
    slug_field = "handle"
    slug_url_kwarg = "handle"
    success_url = reverse_lazy("whoisdb:dashboard")


# InetNum
class InetNumCreate(LoginRequiredMixin, CreateView):
    template_name = "whoisdb/obj_create.html"
    form_class = InetNumForm

    def get_form_kwargs(self, *args, **kwargs):
        print("NOOOOOOOOOOOOOOOOOOOOOOOOOOOOT", args, kwargs)
        kwargs = super(InetNumCreate, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        kwargs["initial"] = {
            "handle": "AUTO",
        }

        return kwargs


class InetNumDetail(DetailView):
    model = InetNum
    slug_field = "handle"
    slug_url_kwarg = "handle"
    context_object_name = "inetnum"


class InetNumEdit(MntGenericMixin, LoginRequiredMixin, UpdateView):
    template_name = "whoisdb/obj_edit.html"
    model = InetNum
    form_class = InetNumForm
    slug_field = "handle"
    slug_url_kwarg = "handle"

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(InetNumEdit, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        kwargs["initial"] = {'prefix': str(self.object.getNetwork())}

        return kwargs


class InetNumDelete(MntGenericMixin, LoginRequiredMixin, DeleteCheckView):
    template_name = "whoisdb/obj_delete.html"
    model = InetNum
    slug_field = "handle"
    slug_url_kwarg = "handle"
    success_url = reverse_lazy("whoisdb:dashboard")


# asblock
class ASBlockCreate(LoginRequiredMixin, CreateView):
    template_name = "whoisdb/obj_create.html"
    form_class = ASBlockForm

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(ASBlockCreate, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        kwargs["initial"] = {
            "handle": "AUTO",
        }

        return kwargs


class ASBlockDetail(DetailView):
    model = ASBlock
    slug_field = "handle"
    slug_url_kwarg = "handle"
    context_object_name = "asblock"


class ASBlockEdit(MntGenericMixin, LoginRequiredMixin, UpdateView):
    template_name = "whoisdb/obj_edit.html"
    model = ASBlock
    form_class = ASBlockForm
    slug_field = "handle"
    slug_url_kwarg = "handle"

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(ASBlockEdit, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        #kwargs["initial"] = {'prefix': str(self.object.getNetwork())}

        return kwargs


class ASBlockDelete(MntGenericMixin, LoginRequiredMixin, DeleteCheckView):
    template_name = "whoisdb/obj_delete.html"
    model = ASBlock
    slug_field = "handle"
    slug_url_kwarg = "handle"
    success_url = reverse_lazy("whoisdb:dashboard")


# asnumber
class ASNumberCreate(LoginRequiredMixin, CreateView):
    template_name = "whoisdb/obj_create.html"
    form_class = ASNumberForm

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(ASNumberCreate, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user
        kwargs["initial"] = {
            "handle": "AUTO",
        }

        return kwargs


class ASNumberDetail(DetailView):
    model = ASNumber
    slug_field = "handle"
    slug_url_kwarg = "handle"
    context_object_name = "asnumber"


class ASNumberEdit(MntGenericMixin, LoginRequiredMixin, UpdateView):
    template_name = "whoisdb/obj_edit.html"
    model = ASNumber
    form_class = ASNumberForm
    slug_field = "handle"
    slug_url_kwarg = "handle"

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(ASNumberEdit, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user

        return kwargs


class ASNumberDelete(MntGenericMixin, LoginRequiredMixin, DeleteCheckView):
    template_name = "whoisdb/obj_delete.html"
    model = ASNumber
    slug_field = "handle"
    slug_url_kwarg = "handle"
    success_url = reverse_lazy("whoisdb:dashboard")


class ASAndSubnetWizard(LoginRequiredMixin, SessionWizardView):
    form_list = [ASNumberForm, InetNumForm]
    template_name = "whoisdb/wizard.html"

    def get_form_initial(self, step):
        return {"handle": "AUTO"}

    def done(self, form_list, **kwargs):
        fl = list(form_list)
        asNum = fl[0].save()
        net = fl[1].save()

        messages.info(self.request, "The following objects have been created: AS %s %s, Subnet %s %s" % (asNum.handle, asNum.number, net.handle, net.getNetwork()))

        return HttpResponseRedirect(reverse("whoisdb:dashboard"))

    def get_form_kwargs(self, *args, **kwargs):
        kwargs = super(ASAndSubnetWizard, self).get_form_kwargs(*args, **kwargs)
        kwargs["user"] = self.request.user

        return kwargs

    def get_context_data(self, *args, **kwargs):
        d = super(ASAndSubnetWizard, self).get_context_data(*args, **kwargs)

        step = d["wizard"]["steps"].step1
        if step == 1:
            d["message"] = "Create an AS object"
        elif step == 2:
            d["message"] = "Create a Subnet"

        return d