"""
FastAPI依赖注入模块
"""

from typing import Generator, Optional
from fastapi import Depends, HTTPException, status
from sqlalchemy.orm import Session

from database.connection import db_manager, get_db
from repositories.face_feature_repository import FaceFeatureRepository
from services.face_feature_service import FaceFeatureService


def get_face_feature_repository(
        db: Session = Depends(get_db)
) -> FaceFeatureRepository:
    """
    获取人脸特征仓库依赖

    Args:
        db: 数据库会话

    Returns:
        FaceFeatureRepository实例
    """
    return FaceFeatureRepository(db)


def get_face_feature_service(
        repository: FaceFeatureRepository = Depends(get_face_feature_repository)
) -> FaceFeatureService:
    """
    获取人脸特征服务依赖

    Args:
        repository: 人脸特征仓库

    Returns:
        FaceFeatureService实例
    """
    return FaceFeatureService(repository)


def get_face_feature_by_id(
        feature_id: int,
        service: FaceFeatureService = Depends(get_face_feature_service)
):
    """
    根据ID获取人脸特征记录的依赖

    Args:
        feature_id: 特征记录ID
        service: 人脸特征服务

    Returns:
        人脸特征记录

    Raises:
        HTTPException: 如果记录不存在
    """
    feature = service.get_feature(feature_id)
    if not feature:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"特征记录不存在 (ID: {feature_id})"
        )
    return feature