from django.contrib.auth.mixins import LoginRequiredMixin
from django.shortcuts import get_object_or_404, render
from django.urls import reverse_lazy
from django.views.generic import CreateView, DeleteView, DetailView, ListView, UpdateView, View

from apps.core.permissions import AdminRequiredMixin
from apps.tickets.models import Ticket, TicketComment


class TicketListView(LoginRequiredMixin, ListView):
    model = Ticket
    template_name = "pages/tickets/ticket_list.html"
    context_object_name = "tickets"
    paginate_by = 20

    def get_queryset(self):
        user = self.request.user
        qs = Ticket.objects.select_related("creator", "project", "assignee")
        if user.is_admin():
            return qs.all()
        if user.is_client():
            return qs.filter(creator=user)
        return qs.filter(project__members=user)


class TicketDetailView(LoginRequiredMixin, DetailView):
    model = Ticket
    template_name = "pages/tickets/ticket_detail.html"
    context_object_name = "ticket"

    def get_queryset(self):
        user = self.request.user
        qs = Ticket.objects.select_related("creator", "project", "assignee")
        if user.is_admin():
            return qs.all()
        if user.is_client():
            return qs.filter(creator=user)
        return qs.filter(project__members=user)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["comments"] = self.object.comments.select_related("author").all()
        return context


class TicketCreateView(LoginRequiredMixin, CreateView):
    model = Ticket
    template_name = "pages/tickets/ticket_form.html"
    fields = ["project", "title", "description", "ticket_type", "priority", "assignee"]

    def form_valid(self, form):
        form.instance.creator = self.request.user
        return super().form_valid(form)

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


class TicketUpdateView(LoginRequiredMixin, UpdateView):
    model = Ticket
    template_name = "pages/tickets/ticket_form.html"
    fields = ["title", "description", "ticket_type", "status", "priority", "assignee"]

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


class TicketDeleteView(AdminRequiredMixin, DeleteView):
    model = Ticket
    template_name = "pages/tickets/ticket_confirm_delete.html"
    success_url = reverse_lazy("ticket_list")


class TicketCommentCreateView(LoginRequiredMixin, View):
    def post(self, request, ticket_pk):
        ticket = get_object_or_404(Ticket, pk=ticket_pk)
        body = request.POST.get("body", "")
        if body:
            TicketComment.objects.create(ticket=ticket, author=request.user, body=body)
        if request.htmx:
            return render(request, "partials/tickets/comment_list.html", {"comments": ticket.comments.all()})
        return render(request, "pages/tickets/ticket_detail.html", {"ticket": ticket, "comments": ticket.comments.all()})