from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from .models import Detection
from .serializers import DetectionSerializer
from django.core.files.base import ContentFile
import cv2
import numpy as np
from ultralytics import YOLO
import os
from django.conf import settings

from .utils import run_detection

class DetectView(APIView):
    def post(self, request):
        if 'image' not in request.FILES:
            return Response({"error": "No image provided"}, status=status.HTTP_400_BAD_REQUEST)
        
        image_file = request.FILES['image']
        
        # Save temporarily to run detection or use the file directly
        # For simplicity and consistency with the utility, we save the object first with empty results
        # then run detection on the saved file path.
        
        detection_obj = Detection.objects.create(
            image=image_file,
            results=[],
            user=request.user if request.user.is_authenticated else None
        )
        
        # Run detection on the saved file
        detections = run_detection(detection_obj.image.path)
        
        # Update results
        detection_obj.results = detections
        detection_obj.save()
        
        return Response(DetectionSerializer(detection_obj).data, status=status.HTTP_201_CREATED)

class DetectionHistoryView(APIView):
    def get(self, request):
        if request.user.is_authenticated:
            detections = Detection.objects.filter(user=request.user).order_by('-created_at')
        else:
            detections = Detection.objects.all().order_by('-created_at')[:10] # Last 10 for guests
            
        serializer = DetectionSerializer(detections, many=True)
        return Response(serializer.data)