from django.shortcuts import get_object_or_404, render
from django.views.generic import ListView, TemplateView
from django.views.generic.edit import CreateView, UpdateView
from django.urls import reverse_lazy
from django.views.generic.detail import DetailView
from django.views.generic.edit import FormMixin
from .forms import CommentForm
from django.urls import reverse

from .models import Ticket


class HomeView(TemplateView):
    template_name = "ticketsystem/home.html"


class TicketListView(ListView):
    model = Ticket
    template_name = "ticketsystem/index.html"
    context_object_name = "tickets"
    ordering = ["-created_at"]  # neueste zuerst
    paginate_by = 10  # optional: Pagination (10 Tickets pro Seite)

    def get_queryset(self):
        queryset = super().get_queryset()
        status = self.request.GET.get("status")

        if status:
            queryset = queryset.filter(status=status)
        return queryset

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["selected_status"] = self.request.GET.get("status", "")
        return context


class TicketDetailView(FormMixin, DetailView):
    model = Ticket  # <- das ist wichtig!
    template_name = "ticketsystem/detail.html"
    context_object_name = "ticket"
    form_class = CommentForm

    def get_success_url(self):
        return reverse("detail", kwargs={"pk": self.object.pk})

    def post(self, request, *args, **kwargs):
        self.object = self.get_object()
        form = self.get_form()
        if form.is_valid():
            comment = form.save(commit=False)
            comment.ticket = self.object
            comment.author = request.user
            comment.save()
            return super().form_valid(form)
        return self.form_invalid(form)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["form"] = self.get_form()
        return context

class TicketCreateView(CreateView):
    model = Ticket
    fields = ["title", "description", "priority", "assigned_to"]  # user & status setzen wir automatisch
    template_name = "ticketsystem/ticket_form.html"
    success_url = reverse_lazy("index")

    def form_valid(self, form):
        form.instance.created_by = self.request.user  # Der angemeldete User wird automatisch gesetzt
        form.instance.status = "open"  # Neues Ticket beginnt immer als "offen"
        return super().form_valid(form)

class TicketUpdateView(UpdateView):
    model = Ticket
    fields = ["title", "description", "status", "priority", "assigned_to"]
    template_name = "ticketsystem/ticket_form.html"  # kannst das gleiche Template wie beim Erstellen verwenden
    success_url = reverse_lazy("index")  # oder zurück zur Detailseite

    def get_queryset(self):
        return Ticket.objects.all()  # Optional: Nur eigene Tickets bearbeiten lassen?