#!/usr/bin/env python
#coding:utf-8

import datetime
import os
import zipfile
import subprocess
import json
import hashlib

def zip_dir(dirpath, out_fullname):
    """
    压缩指定文件夹
    :param dirpath: 目标文件夹路径
    :param outFullName: 压缩文件保存路径+xxxx.zip
    :return: 无
    """
    zip = zipfile.ZipFile(out_fullname,"w",zipfile.ZIP_DEFLATED)
    for path,dirnames,filenames in os.walk(dirpath):
        # 去掉目标跟路径，只对目标文件夹下边的文件及文件夹进行压缩
        fpath = path.replace(dirpath,'')

        for filename in filenames:
            zip.write(os.path.join(path,filename),os.path.join(fpath,filename))
    zip.close()

def unzip_dir(zip_src, dst_dir):
    """
    解压文件到指定文件夹
    :param zip_src: zip文件
    :param dst_dir: 解压目录
    :return: 无
    """
    r = zipfile.is_zipfile(zip_src)
    if r:
        fz = zipfile.ZipFile(zip_src, 'r')
        for file in fz.namelist():
            fz.extract(file, dst_dir)
    else:
        print("{}不是zip文件".format(zip_src))

def zip_file(file_path, out_fullname, is_fixedtime = True):
    """
    压缩指定文件
    :param dirpath: 目标文件路径
    :param outFullName: 压缩文件保存路径+xxxx.zip
    :return: 无
    """
    zip_file = zipfile.ZipFile(out_fullname,'w')
    zip_file.write(file_path, compress_type=zipfile.ZIP_DEFLATED)
    if is_fixedtime:
        # 分离文件名称
        names = zip_file.namelist()
        for a_name in names:
            zipinfo_obj = zip_file.getinfo(a_name)
            file_stat = os.stat(file_path)
            zipinfo_obj.date_time = datetime.datetime.fromtimestamp(file_stat.st_mtime).timetuple()[:6]

    zip_file.close()
def unzip_file(zip_file_path):
    """
    解压文件
    :param zip_src: zip文件
    :return: 无
    """
    zip_file = zipfile.ZipFile(zip_file_path)

    # 解压
    # zip_file.extractall(path="{}/../".format(os.path.splitext(zip_file_path)[0]))

    # 设置要解压缩的文件和目录
    extract_dir = "{}".format(os.path.split(zip_file_path)[0])

    # 解压缩文件并将修改时间设置为原有时间
    with zipfile.ZipFile(zip_file_path, 'r') as zip_file:
        for zip_info in zip_file.infolist():
            zip_file.extract(zip_info.filename, path=extract_dir)
            file_path = os.path.join(extract_dir, zip_info.filename)
            mtime = int(datetime.datetime(*zip_info.date_time).timestamp())
            os.utime(file_path, (mtime, mtime))


def DoCmd(strcmd, logPath=""):
    if len(logPath) > 1:
        logfile = file(logPath, "a")
        logfile.writelines("-----------------------------")
        logfile.writelines(strcmd)

    process = subprocess.Popen(
        strcmd, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    print(strcmd)
    lines_out = process.stdout.readlines()
    for l in lines_out:
        print(l)
        if len(logPath) > 1:
            logfile.writelines(l)


    lines_error = process.stderr.readlines()
    if len(logPath) > 1 and len(lines_error)>0:
        logfile.writelines("has error:\n\n")
    for l in lines_error:
        print(l)
        if len(logPath) > 1:
            logfile.writelines(l)

    print("end: "+strcmd)
    if len(logPath) > 0:
        logfile.writelines("end: "+strcmd)
        logfile.close()
    #
    return lines_out, lines_error

def get_file_last_line(fname):
    """
    f_name为所读xx.txt文件
    输出为：文件最后一行
    """
    print(fname)
    with open(fname, 'r') as f:  #打开文件
        first_line = f.readline()  #读第一行
        off = -50      #设置偏移量
        while True:
            f.seek(off, 2) #seek(off, 2)表示文件指针：从文件末尾(2)开始向前50个字符(-50)
            lines = f.readlines() #读取文件指针范围内所有行
            if len(lines)>=2: #判断是否最后至少有两行，这样保证了最后一行是完整的
                last_line = lines[-1] #取最后一行
                break
            #如果off为50时得到的readlines只有一行内容，那么不能保证最后一行是完整的
            #所以off翻倍重新运行，直到readlines不止一行
            off *= 2

    print('文件' + fname + '第一行为：' + first_line)
    print('文件' + fname + '最后一行为：'+ last_line)
    return last_line

def open_json(path):
    dic = {}
    with open(path, 'r') as f:
        dic = json.load(f)
    
    return dic

def write_json(path, content):
    with open(path, 'w') as f:
        json.dump(content, f)

#根据文件内容，生成hash值，filepath文件路径
def calc_hash(filepath):
    with open(filepath,'rb') as f:
        sha1obj = hashlib.sha1()
        sha1obj.update(f.read())
        hash = sha1obj.hexdigest()
        return hash