# -*- coding: utf-8 -*-

import base64
from fastapi import APIRouter, Form, UploadFile
from fastapi.responses import JSONResponse
from digitalHuman.server.reponse import Response
from digitalHuman.server.header import HeaderInfo
from digitalHuman.server.models import FaceDetectionOutput

# 延迟导入，避免启动时触发 uniface 导入（可能导致 DLL 加载失败）
# 只在 API 调用时才导入
def _get_face_detection_infer():
    """延迟导入 face_detection_infer"""
    from digitalHuman.server.core.api_face_detection_v0_impl import face_detection_infer
    return face_detection_infer

router = APIRouter(prefix="/face_detection/v0")

# ========================= 人脸检测 ===========================
@router.post("/detect", summary="Face Detection")
async def api_face_detection(header: HeaderInfo, file: UploadFile):
    """
    执行人脸检测
    接收图片文件，返回检测到的人脸信息
    """
    response = Response()
    try:
        file_data = await file.read()
        face_detection_infer = _get_face_detection_infer()
        result = await face_detection_infer(header, file_data)
        response.data = result
    except Exception as e:
        response.data = {"hasFace": False, "faceCount": 0, "faces": []}
        response.error(str(e))
    return JSONResponse(content=response.validate(FaceDetectionOutput), status_code=200)

# ========================= 人脸检测 (Base64) ===========================
@router.post("/detect/base64", summary="Face Detection (Base64)")
async def api_face_detection_base64(header: HeaderInfo, image_data: str = Form(...)):
    """
    执行人脸检测 (Base64格式)
    接收Base64编码的图片数据，返回检测到的人脸信息
    """
    response = Response()
    try:
        # 解码Base64图片
        if image_data.startswith('data:image'):
            # 处理 data:image/jpeg;base64,xxx 格式
            image_data = image_data.split(',')[1]
        file_data = base64.b64decode(image_data)
        face_detection_infer = _get_face_detection_infer()
        result = await face_detection_infer(header, file_data)
        response.data = result
    except Exception as e:
        response.data = {"hasFace": False, "faceCount": 0, "faces": []}
        response.error(str(e))
    return JSONResponse(content=response.validate(FaceDetectionOutput), status_code=200)