import io
from minio.error import S3Error


class MinioClient:
    def __init__(self, client, bucket: str):
        self._client = client
        self._bucket = bucket

    def list_objects(self, prefix: str) -> list[dict]:
        objects = self._client.list_objects(self._bucket, prefix=prefix, recursive=False)
        result = []
        for obj in objects:
            result.append({
                "key": obj.object_name,
                "size": obj.size,
                "is_dir": obj.object_name.endswith("/"),
                "modifiedAt": obj.last_modified.isoformat() if obj.last_modified else None,
            })
        return result

    def get_object(self, key: str) -> bytes:
        try:
            response = self._client.get_object(self._bucket, key)
        except S3Error as exc:
            if exc.code == "NoSuchKey":
                raise FileNotFoundError(key) from exc
            raise
        try:
            return response.read()
        finally:
            response.close()
            response.release_conn()

    def put_object(self, key: str, data: bytes, content_type: str) -> None:
        self._client.put_object(
            self._bucket,
            key,
            io.BytesIO(data),
            length=len(data),
            content_type=content_type,
        )

    def delete_object(self, key: str) -> None:
        self._client.remove_object(self._bucket, key)