from rest_framework import status
from rest_framework.views import APIView
from rest_framework.generics import CreateAPIView, GenericAPIView
from rest_framework.response import Response
from rest_framework.permissions import AllowAny
from django.utils import timezone
from drf_yasg.utils import swagger_auto_schema
from drf_yasg import openapi

from apps.api.models import AppVersion, SupportMessage
from apps.api.serializers import AppVersionSerializer, SupportMessageCreateSerializer


class HealthCheckView(APIView):
    """
    Health check endpoint returning system status and current timestamp
    """
    permission_classes = [AllowAny]

    @swagger_auto_schema(
        operation_description="Check API server health status",
        responses={
            200: openapi.Response(
                description="Server is healthy",
                examples={
                    "application/json": {
                        "status": "healthy",
                        "timestamp": "2026-09-13T12:00:00Z",
                        "version": "1.0.0"
                    }
                }
            )
        }
    )
    def get(self, request):
        return Response({
            "status": "healthy",
            "timestamp": timezone.now().isoformat(),
            "version": "1.0.0",
        }, status=status.HTTP_200_OK)


class AppVersionView(APIView):
    """
    Returns latest active application version
    """
    permission_classes = [AllowAny]

    @swagger_auto_schema(
        operation_description="Get the latest active mobile application version",
        responses={
            200: AppVersionSerializer(),
            404: openapi.Response("No active version found")
        }
    )
    def get(self, request):
        version = AppVersion.get_latest_active()
        if not version:
            return Response({"detail": "No active version found."}, status=status.HTTP_404_NOT_FOUND)
        serializer = AppVersionSerializer(version, context={'request': request})
        return Response(serializer.data)


class SupportMessageCreateView(CreateAPIView):
    """
    Submit a user contact or support inquiry
    """
    permission_classes = [AllowAny]
    serializer_class = SupportMessageCreateSerializer
    queryset = SupportMessage.objects.all()


# HomeView alias for backward compatibility
HomeView = HealthCheckView