from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework.viewsets import ReadOnlyModelViewSet

from apps.assets.serializers import AssetSerializer
from apps.common.api import TeamScopedViewSetMixin, get_current_team

from .models import AITask, ModelConfig
from .serializers import AITaskSerializer, ModelConfigSerializer
from .services import generate_standalone_image


class GenerateImageView(APIView):
    """POST /api/ai/generate-image/ — 独立生图(不绑项目)· 图片创作/模特图/平台套图共用。"""

    def post(self, request):
        prompt = str(request.data.get("prompt") or "").strip()
        if not prompt:
            return Response({"detail": "prompt 不能为空"}, status=status.HTTP_400_BAD_REQUEST)
        mode = str(request.data.get("mode") or "image")
        try:
            count = int(request.data.get("count") or 1)
        except (TypeError, ValueError):
            count = 1
        team = get_current_team(request.user)
        try:
            assets = generate_standalone_image(team=team, user=request.user, prompt=prompt, mode=mode, count=count)
        except ValueError as exc:
            return Response({"detail": str(exc)}, status=status.HTTP_400_BAD_REQUEST)
        except Exception as exc:  # noqa: BLE001 — 生成失败已回滚额度,返回明确错误给前端
            return Response({"detail": f"生成失败: {exc}"}, status=status.HTTP_502_BAD_GATEWAY)
        return Response({"assets": AssetSerializer(assets, many=True).data}, status=status.HTTP_201_CREATED)


class AITaskViewSet(TeamScopedViewSetMixin, ReadOnlyModelViewSet):
    queryset = AITask.objects.select_related("team", "project", "model_config", "model_config__provider").all()
    serializer_class = AITaskSerializer
    search_fields = ["idempotency_key", "provider_task_id", "project__name"]
    ordering_fields = ["created_at", "updated_at", "completed_at"]


class ModelConfigViewSet(ReadOnlyModelViewSet):
    queryset = ModelConfig.objects.select_related("provider").filter(status=ModelConfig.Status.ACTIVE)
    serializer_class = ModelConfigSerializer
    search_fields = ["name", "display_name", "capability"]
    ordering_fields = ["created_at", "display_name"]