from pathlib import Path
import uuid

from django.db import transaction
from rest_framework import status
from rest_framework.parsers import FormParser, MultiPartParser
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework.viewsets import ModelViewSet

from apps.common.api import TeamScopedViewSetMixin, get_current_team

from .models import Asset, AssetFile
from .serializers import AssetSerializer, AssetUploadSerializer
from .storage import TosStorage


class AssetViewSet(TeamScopedViewSetMixin, ModelViewSet):
    queryset = Asset.objects.prefetch_related("files").all()
    serializer_class = AssetSerializer
    search_fields = ["name", "description"]
    ordering_fields = ["created_at", "updated_at", "name"]


class AssetUploadView(APIView):
    parser_classes = [MultiPartParser, FormParser]

    @transaction.atomic
    def post(self, request):
        serializer = AssetUploadSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        team = get_current_team(request.user)
        upload = serializer.validated_data["file"]
        suffix = Path(upload.name).suffix.lower()
        asset_id = uuid.uuid4()
        object_key = f"teams/{team.id}/uploads/{asset_id}{suffix}"

        stored = TosStorage().upload_fileobj(
            fileobj=upload.file,
            object_key=object_key,
            content_type=upload.content_type or "application/octet-stream",
        )
        asset = Asset.objects.create(
            id=asset_id,
            team=team,
            created_by=request.user,
            name=serializer.validated_data.get("name") or upload.name,
            asset_type=serializer.validated_data["asset_type"],
            source=Asset.Source.UPLOAD,
            category=serializer.validated_data["category"],
            description=serializer.validated_data.get("description", ""),
        )
        AssetFile.objects.create(
            asset=asset,
            object_key=stored.object_key,
            bucket=stored.bucket,
            content_type=stored.content_type,
            size_bytes=stored.size_bytes,
            is_primary=True,
        )
        return Response(AssetSerializer(asset).data, status=status.HTTP_201_CREATED)