from django.shortcuts import get_object_or_404
from drf_spectacular.utils import extend_schema
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response
from rest_framework.views import APIView

from .models import BugReport, Ticket, TicketMessage
from .serializers import (
    BugReportCreateRequestSerializer,
    BugReportCreateResponseSerializer,
    TicketCreateRequestSerializer,
    TicketCreateResponseSerializer,
    TicketDetailResponseSerializer,
    TicketMessageCreateRequestSerializer,
    TicketMessageCreateResponseSerializer,
)


class BugReportCreateView(APIView):
    """POST /api/support/bug-reports — ثبت گزارش باگ"""

    permission_classes = [IsAuthenticated]

    @extend_schema(
        request=BugReportCreateRequestSerializer,
        responses=BugReportCreateResponseSerializer,
        tags=['Support (support)'],
    )
    def post(self, request):
        serializer = BugReportCreateRequestSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        v = serializer.validated_data

        bug = BugReport.objects.create(
            user_id=request.user.id,
            title=v['title'],
            description=v['description'],
            screenshot_url=v.get('screenshotUrl', ''),
        )

        data = {'bugReportId': str(bug.pk), 'status': bug.status}
        return Response(BugReportCreateResponseSerializer(data).data)


class TicketCreateView(APIView):
    """POST /api/support/tickets — ایجاد تیکت"""

    permission_classes = [IsAuthenticated]

    @extend_schema(
        request=TicketCreateRequestSerializer,
        responses=TicketCreateResponseSerializer,
        tags=['Support (support)'],
    )
    def post(self, request):
        serializer = TicketCreateRequestSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        v = serializer.validated_data

        ticket = Ticket.objects.create(
            user_id=request.user.id,
            subject=v['subject'],
            category=v['category'],
            priority=v.get('priority', 'normal'),
        )

        data = {'ticketId': str(ticket.pk), 'status': ticket.status}
        return Response(TicketCreateResponseSerializer(data).data)


class TicketDetailView(APIView):
    """
    GET /api/support/tickets/{id} — جزئیات و پیام‌های تیکت

    فقط تیکت متعلق به همون کاربر برمی‌گرده (فیلتر با user_id، دقیقاً
    همون الگوی محدودسازی به مالک که در progress/views.py برای
    UserStats و در ai_tutor/views.py برای Conversation استفاده شده).
    """

    permission_classes = [IsAuthenticated]

    @extend_schema(responses=TicketDetailResponseSerializer, tags=['Support (support)'])
    def get(self, request, ticket_id):
        ticket = get_object_or_404(Ticket, pk=ticket_id, user_id=request.user.id)

        messages = [
            {'id': str(m.pk), 'sender': m.sender, 'text': m.text}
            for m in ticket.messages.all()
        ]
        data = {
            'ticketId': str(ticket.pk),
            'subject': ticket.subject,
            'status': ticket.status,
            'messages': messages,
        }
        return Response(TicketDetailResponseSerializer(data).data)


class TicketMessageCreateView(APIView):
    """
    POST /api/support/tickets/{id}/messages — ارسال پیام در تیکت

    این Endpoint سمت کاربره، پس sender همیشه 'user' ثبت می‌شه. پاسخ
    پشتیبانی (sender='support') از پنل ادمین ثبت می‌شه و طبق سند معماری
    از همون‌جا رویداد TicketReplied برای Notifications ساطع می‌شه
    (پیاده‌سازی در support/admin.py، نه اینجا).
    """

    permission_classes = [IsAuthenticated]

    @extend_schema(
        request=TicketMessageCreateRequestSerializer,
        responses=TicketMessageCreateResponseSerializer,
        tags=['Support (support)'],
    )
    def post(self, request, ticket_id):
        ticket = get_object_or_404(Ticket, pk=ticket_id, user_id=request.user.id)

        serializer = TicketMessageCreateRequestSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        v = serializer.validated_data

        message = TicketMessage.objects.create(ticket=ticket, sender='user', text=v['text'])

        data = {'messageId': str(message.pk), 'success': True}
        return Response(TicketMessageCreateResponseSerializer(data).data)