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_spectacular.utils import extend_schema, OpenApiResponse, inline_serializer
from rest_framework import serializers

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]

    @extend_schema(
        summary="Check API server health status",
        description="Returns system status, current timestamp, and API version",
        responses={
            200: inline_serializer(
                name="HealthCheckResponse",
                fields={
                    "status": serializers.CharField(default="healthy"),
                    "timestamp": serializers.DateTimeField(),
                    "version": serializers.CharField(default="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]

    @extend_schema(
        summary="Get active application version",
        description="Returns latest active mobile/web application version details",
        responses={
            200: AppVersionSerializer,
            404: OpenApiResponse(description="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