import logging
import time
from minio import Minio
from io import BytesIO
from rag import settings
from rag.utils import singleton


@singleton
class RAGFlowMinio(object):
    def __init__(self):
        self.conn = None
        self.__open__()

    def __open__(self):
        try:
            if self.conn:
                self.__close__()
        except Exception:
            pass

        try:
            self.conn = Minio(settings.MINIO["host"],
                              access_key=settings.MINIO["user"],
                              secret_key=settings.MINIO["password"],
                              secure=False
                              )
        except Exception:
            logging.exception(
                "Fail to connect %s " % settings.MINIO["host"])

    def __close__(self):
        del self.conn
        self.conn = None

    def health(self):
        bucket, fnm, binary = "txtxtxtxt1", "txtxtxtxt1", b"_t@@@1"
        if not self.conn.bucket_exists(bucket):
            self.conn.make_bucket(bucket)
        r = self.conn.put_object(bucket, fnm,
                                 BytesIO(binary),
                                 len(binary)
                                 )
        return r

    def put(self, bucket, fnm, binary):
        for _ in range(3):
            try:
                if not self.conn.bucket_exists(bucket):
                    self.conn.make_bucket(bucket)

                r = self.conn.put_object(bucket, fnm,
                                         BytesIO(binary),
                                         len(binary)
                                         )
                return r
            except Exception:
                logging.exception(f"Fail to put {bucket}/{fnm}:")
                self.__open__()
                time.sleep(1)

    def rm(self, bucket, fnm):
        try:
            self.conn.remove_object(bucket, fnm)
        except Exception:
            logging.exception(f"Fail to remove {bucket}/{fnm}:")

    def get(self, bucket, filename):
        for _ in range(1):
            try:
                r = self.conn.get_object(bucket, filename)
                return r.read()
            except Exception:
                logging.exception(f"Fail to get {bucket}/{filename}")
                self.__open__()
                time.sleep(1)
        return

    def obj_exist(self, bucket, filename):
        try:
            if not self.conn.bucket_exists(bucket):
                return False
            if self.conn.stat_object(bucket, filename):
                return True
            else:
                return False
        except Exception:
            logging.exception(f"Not found: {bucket}/{filename}")
            return False

    def get_presigned_url(self, bucket, fnm, expires):
        for _ in range(10):
            try:
                return self.conn.get_presigned_url("GET", bucket, fnm, expires)
            except Exception:
                logging.exception(f"Fail to get_presigned {bucket}/{fnm}:")
                self.__open__()
                time.sleep(1)
        return

    def list_objects(self, bucket: str, prefix: str = "", recursive: bool = True) -> list[dict]:
        """
        列出存储桶中指定前缀的所有对象

        :param bucket: 存储桶名称
        :param prefix: 对象前缀（目录路径）
        :param recursive: 是否递归列出
        :return: 对象信息列表 [{"name": str, "size": int, "last_modified": datetime}, ...]
        """
        objects = []
        for attempt in range(3):
            try:
                # 确保存储桶存在
                if not self.conn.bucket_exists(bucket):
                    logging.warning(f"存储桶不存在: {bucket}")
                    return []

                # 列出对象
                result = self.conn.list_objects(bucket, prefix=prefix, recursive=recursive)

                # 收集对象信息
                for obj in result:
                    objects.append({
                        "name": obj.object_name,
                        "size": obj.size,
                        "last_modified": obj.last_modified,
                        "etag": obj.etag,
                        "content_type": obj.content_type
                    })

                return objects
            except S3Error as e:
                if e.code == "NoSuchBucket":
                    logging.warning(f"存储桶不存在: {bucket}")
                    return []
                logging.exception(f"列出对象时发生S3错误: {e}")
            except Exception as e:
                logging.exception(f"列出对象失败 (尝试 {attempt + 1}/3): {e}")

            # 重连并等待
            self.__open__()
            time.sleep(1)

        return []

MINIO = RAGFlowMinio()

if __name__ == "__main__":
    conn = RAGFlowMinio()
    fnm = "/opt/home/kevinhu/docgpt/upload/13/11-408.jpg"
    from PIL import Image

    img = Image.open(fnm)
    buff = BytesIO()
    img.save(buff, format='JPEG')
    print(conn.put("test", "11-408.jpg", buff.getvalue()))
    bts = conn.get("test", "11-408.jpg")
    img = Image.open(BytesIO(bts))
    img.save("test.jpg")