"""MinIO 对象存储（基于 SDK）"""
from app.config import (
    MINIO_ENDPOINT,
    MINIO_PORT,
    MINIO_ACCESS_KEY,
    MINIO_SECRET_KEY,
    MINIO_BUCKET,
    MINIO_USE_SSL,
    MINIO_PUBLIC_URL,
    MINIO_UPLOAD_PREFIX,
)
from app.sdk.minio import MinioSDK

_minio_sdk: MinioSDK | None = None


def _get_minio_sdk() -> MinioSDK:
    global _minio_sdk
    if _minio_sdk is None:
        _minio_sdk = MinioSDK(
            end_point=MINIO_ENDPOINT,
            access_key=MINIO_ACCESS_KEY,
            secret_key=MINIO_SECRET_KEY,
            bucket=MINIO_BUCKET,
            use_ssl=MINIO_USE_SSL,
            port=MINIO_PORT,
            public_url=MINIO_PUBLIC_URL,
            upload_prefix=MINIO_UPLOAD_PREFIX,
        )
    return _minio_sdk


def get_minio_client():
    """获取 MinIO 客户端（未配置时返回 None）"""
    sdk = _get_minio_sdk()
    if not sdk.enabled:
        return None
    return sdk.get_client()


def upload_buffer(data: bytes, object_key: str, content_type: str = "application/octet-stream"):
    """上传文件到 MinIO（未配置时抛出异常）"""
    sdk = _get_minio_sdk()
    if not sdk.enabled:
        raise RuntimeError("MinIO 未配置，请设置 MINIO_ACCESS_KEY、MINIO_SECRET_KEY")
    return sdk.upload_buffer(data, object_key, content_type)


def generate_object_key(ext: str) -> str:
    """生成上传用的对象键"""
    return _get_minio_sdk().generate_object_key(ext)