from fastapi import APIRouter, File, UploadFile, Depends, HTTPException, Path
from fastapi.concurrency import run_in_threadpool
from typing import Annotated
from enum import Enum
from ..core.config import settings
from app.services.card_service import CardInferenceService, card_service

router = APIRouter()

model_names = list(settings.CARD_MODELS_CONFIG.keys())
InferenceType = Enum("InferenceType", {name: name for name in model_names})


@router.post("/json_result")
async def card_json_result(
        inference_type: InferenceType,
        # 依赖注入保持不变
        service: CardInferenceService = Depends(lambda: card_service),
        file: UploadFile = File(...)
):
    """
    接收一张卡片图片，使用指定类型的模型进行推理，并返回JSON结果。

    - **inference_type**: 要使用的模型类型（从下拉列表中选择）。
    - **file**: 要上传的图片文件。
    """
    image_bytes = await file.read()

    try:
        # 3. 传递参数时，使用 .value 获取 Enum 的字符串值
        json_result = await run_in_threadpool(
            service.predict,
            inference_type=inference_type.value,  # 使用 .value
            image_bytes=image_bytes
        )
        return json_result
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"服务器内部错误: {e}")