"""
Author  : XinYi Song
Time    : 2021/11/3 14:29
Desc:
"""
from util.file_store_path import file_store_path_day, file_store_path_year, file_store_path_month

"""
实现文件断点续传
"""
import sys
import os
from hashlib import md5

FILE_DIR = os.path.dirname(__file__)

BASE_DIR = os.path.dirname(os.path.dirname(__file__))
home = os.path.join(BASE_DIR, "E:/data/upload")


# 定义一个函数，计算进度条
def bar(num=1, sum=100):
    rate = float(num) / float(sum)
    rate_num = int(rate * 100)
    temp = '\r%d %%' % rate_num
    sys.stdout.write(temp)


def md5_file(name):
  m = md5()
  a_file = open(name, 'rb') #需要使用二进制格式读取文件内容
  m.update(a_file.read())
  a_file.close()
  return m.hexdigest()


def upload_client(local_path, depth, dateTime):
    global file_path
    while True:
        file_byte_size = os.stat(local_path).st_size  # 获取文件的大小
        file_name = os.path.basename(local_path)  # 设置文件名
        md5 = md5_file(local_path)

        has_sent = 0
        file_obj = open(local_path, 'rb')  # 对文件进行读操作
        file_obj.seek(has_sent)  # 调整指针
        if depth == 'year':
            file_path = file_store_path_year(dateTime, home)
            if not os.path.exists(file_path):
                os.makedirs(file_path)
        if depth == 'month':
            file_path = file_store_path_month(dateTime, home)
            if not os.path.exists(file_path):
                os.makedirs(file_path)
        if depth == 'day':
            file_path = file_store_path_day(dateTime, home)
            if not os.path.exists(file_path):
                os.makedirs(file_path)
        path = os.path.join(file_path, file_name)
        has_received = 0

        # 首先判断该路径下是否已存在文件
        if os.path.exists(path):
            f = open(path, 'wb')
        else:
            f = open(path, 'wb')

        while has_sent < file_byte_size:
            # 读出数据
            data = file_obj.read(1024)
            try:
                # 写入数据
                f.write(data)
                has_received += len(data)
                if not data:
                    raise Exception
            except Exception:
                flag = False
                break
            has_sent += len(data)
            bar(has_sent, file_byte_size)  # 进度条
        print("文件上传成功！")
        file_obj.close()
        f.close()
        file_dict = {'fileName': file_name, 'md5': md5, 'file_size': file_byte_size, 'file_path': file_path, 'type': 'ok'}
        return file_dict