import logging

import requests
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
from rest_framework import status
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response
from rest_framework.views import APIView

from apps.core.utils import capture_and_log
from apps.core.utils.cloudflare import get_direct_upload_url

logger = logging.getLogger(__name__)


class GenerateUploadURLView(APIView):
    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            # Pass user_id for metadata if needed
            result = get_direct_upload_url(user_id=str(request.user.id))
            return Response(result, status=status.HTTP_200_OK)
        except ImproperlyConfigured as e:
            capture_and_log(e, 'Generate upload URL - configuration error', source='api')
            return Response({"detail": "Server configuration error."}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
        except requests.RequestException as e:
            capture_and_log(e, 'Generate upload URL - Cloudflare API error', source='api')
            return Response({"detail": "Failed to generate upload URL."}, status=status.HTTP_502_BAD_GATEWAY)
        except Exception as e:
            capture_and_log(e, 'Generate upload URL - unexpected error', source='api')
            return Response({"detail": "An unexpected error occurred."}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)


class DeleteImageView(APIView):
    """
    POST /images/delete/
    Delete an image from Cloudflare Images.
    """

    permission_classes = [IsAuthenticated]

    def post(self, request):
        image_id = request.data.get("image_id")

        if not image_id:
            return Response(
                {"detail": "image_id is required"},
                status=status.HTTP_400_BAD_REQUEST,
            )

        try:
            # Get Cloudflare credentials
            account_id = getattr(settings, "CLOUDFLARE_IMAGES_ACCOUNT_ID", None)
            api_token = getattr(settings, "CLOUDFLARE_IMAGES_API_TOKEN", None)

            if not account_id or not api_token:
                logger.warning("Cloudflare Images not configured, mock deleting image")
                return Response({"success": True, "mock": True})

            # Delete from Cloudflare
            url = f"https://api.cloudflare.com/client/v4/accounts/{account_id}/images/v1/{image_id}"
            response = requests.delete(
                url,
                headers={"Authorization": f"Bearer {api_token}"},
                timeout=10,
            )

            if response.status_code in (200, 404):  # 404 = already deleted
                return Response({"success": True})
            else:
                logger.error(f"Cloudflare delete failed: {response.text}")
                return Response(
                    {"detail": "Failed to delete image"},
                    status=status.HTTP_502_BAD_GATEWAY,
                )

        except requests.RequestException as e:
            capture_and_log(e, "Delete image - Cloudflare API error", source="api")
            return Response(
                {"detail": "Failed to delete image"},
                status=status.HTTP_502_BAD_GATEWAY,
            )
        except Exception as e:
            capture_and_log(e, "Delete image - unexpected error", source="api")
            return Response(
                {"detail": "An unexpected error occurred"},
                status=status.HTTP_500_INTERNAL_SERVER_ERROR,
            )


class GenerateOGImageView(APIView):
    """
    POST /images/og-image/
    Generate an Open Graph image for social sharing.
    """

    permission_classes = []  # Public endpoint

    def post(self, request):
        title = request.data.get("title", "")
        description = request.data.get("description", "")
        entity_type = request.data.get("entity_type", "")
        image_url = request.data.get("image_url", "")

        if not title:
            return Response(
                {"detail": "title is required"},
                status=status.HTTP_400_BAD_REQUEST,
            )

        try:
            # This is a placeholder for OG image generation
            # In production, you would:
            # 1. Use an image generation service (Cloudinary, imgix, etc.)
            # 2. Or use a headless browser service (Puppeteer, Playwright)
            # 3. Or use a dedicated OG image service

            # For now, return a template URL or placeholder
            base_url = getattr(settings, "SITE_URL", "https://thrillwiki.com")
            og_image_url = f"{base_url}/api/v1/images/og-preview/?title={title[:100]}"

            return Response({
                "success": True,
                "og_image_url": og_image_url,
                "title": title,
                "description": description[:200] if description else "",
                "entity_type": entity_type,
                "note": "Placeholder - configure OG image service for production",
            })

        except Exception as e:
            capture_and_log(e, "Generate OG image", source="api")
            return Response(
                {"detail": str(e)},
                status=status.HTTP_500_INTERNAL_SERVER_ERROR,
            )