"""
********************************************
* @Date: 2024 09 27
* @Description: BlobObject存储对象
********************************************
"""

import hashlib
import os
import zlib


class BlobObject:
    object_id: str
    __buff_size: int = 8192

    def __init__(self, file_path: str) -> None:
        self.file_path = file_path
        self.object_id = self.contentSha1()

    def writeBlob(self, base_path) -> None:
        Folder = base_path + "/" + self.__getFolderName()
        if not os.path.exists(Folder):
            os.makedirs(Folder)
        self.__compressFile(
            self.file_path,
            base_path + "/" + self.__getFolderName() + "/" + self.__getFileName(),
        )

    def __compressFile(self, file_path, save_path) -> None:
        compresser = zlib.compressobj(9)
        write_file = open(save_path, "wb")
        with open(file_path, "rb") as f:
            while True:
                data = f.read(self.__buff_size)
                if not data:
                    break
                compressedData = compresser.compress(data)
                write_file.write(compressedData)
            write_file.write(compresser.flush())
            write_file.close()

    def __getFolderName(self) -> str:
        return self.object_id[:2]

    def __getFileName(self) -> str:
        return self.object_id[2:]

    def getBlobAbsPath(self) -> str:
        """
        获取blob的绝对路径,此相对路径是基于存储路径的,不是相对当前文件的路径

        :return 相对路径,格式为xx/xxxx...
        """
        return self.__getFolderName() + "/" + self.__getFileName()

    def contentSha1(self) -> str:
        """
        计算文件内容的sha1值

        :return sha1的hex值
        """
        with open(self.file_path, "rb") as f:
            sha1 = hashlib.sha1()
            while True:
                data = f.read(self.__buff_size)
                if not data:
                    break
                sha1.update(data)
            return sha1.hexdigest()