import os
from datetime import datetime
import requests
import json

class Log:
    """logging system"""

    def __init__(self,homepath, logfilename):
        self.homepath = homepath
        self.logfilename = logfilename

    def inet_addr(self):
        """return public ip address"""
        print "return public ip address..."
        return requests.get("http://httpbin.org/ip").json()['origin']

    def files_attr(self, path):
        """return home path files attributes"""
        print "return file list...", path
        fls = []
        for p,ds,fs in os.walk(path):
            for f in fs:
                print str(os.path.join(p,f))
                # 使用','.join("%s" % x for x in LIST)，是为了避免抛出 sequence item 0 expected string int found的错误
                fls.append( str(os.path.join(p,f)) + ':'  + ','.join("%s"%x for x in os.stat(os.path.join(p,f))))
        return json.dumps(fls)

    def record(self):
        """write into log file"""
        print "write into file..."
        with open(self.logfilename,'a') as f:
            sep = '-' * 40
            f.write(sep)
            f.write(str(datetime.now()))
            f.write(sep + '\n')
            f.write(self.inet_addr() + '\n')
            f.write(self.files_attr(self.homepath) + '\n')


if __name__ == '__main__':
    HOME_PATH = os.path.join('your','real','path')
    LOG_FILENAME = os.path.join(os.getcwd(),'log.txt')
    print LOG_FILENAME
    log = Log(HOME_PATH,LOG_FILENAME)
    log.record()
    print "finished..."