from xmlrpclib import ServerProxy, Error
import argparse
import urllib2
import struct
import os

opensub_domain = "http://api.opensubtitles.org/xml-rpc"
default_useragent = "OS Test User Agent"

server = ServerProxy(opensub_domain)

def get_hash(name):
    try:
        longlongformat = 'q'  # long long
        bytesize = struct.calcsize(longlongformat)

        f = open(name, "rb")

        filesize = os.path.getsize(name)
        hash = filesize

        if filesize < 65536 * 2:
            return "SizeError"

        for x in range(65536 / bytesize):
            buffer = f.read(bytesize)
            (l_value,) = struct.unpack(longlongformat, buffer)
            hash += l_value
            hash = hash & 0xFFFFFFFFFFFFFFFF  # to remain as 64bit number

        f.seek(max(0, filesize - 65536), 0)
        for x in range(65536 / bytesize):
            buffer = f.read(bytesize)
            (l_value,) = struct.unpack(longlongformat, buffer)
            hash += l_value
            hash = hash & 0xFFFFFFFFFFFFFFFF

        f.close()
        returnedhash = "%016x" % hash
        return returnedhash

    except(IOError):
        return None


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument("file", type=str,
                        help="input video file")
    args = parser.parse_args()
    #args.file
    current_hash = get_hash(args.file)
    current_size = os.path.getsize(args.file)
    session = server.LogIn("", "", "en", default_useragent)
    token = session["token"]
    searchlist = []
    searchlist.append({'moviehash': current_hash, 'moviebytesize': str(current_size)})
    moviesList = server.SearchSubtitles(token, searchlist)
    if moviesList['data']:
        data = moviesList['data']
        print data[0]['MovieName']
    else:
        print 'no info'