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# coding=utf-8

import shutil
import tempfile
import os.path as pt
import sys
import libtorrent as lt
from time import sleep

def magnet2torrent(magnet, output_name=None):
    if output_name and not pt.isdir(output_name) and not pt.isdir(pt.dirname(pt.abspath(output_name))):
        print("Invalid output folder: " + pt.dirname(pt.abspath(output_name)))
        sys.exit(0)
    tempdir = tempfile.mkdtemp()
    ses = lt.session()
    params = {
        'save_path': tempdir,
        'duplicate_is_error': True,
        'storage_mode': lt.storage_mode_t(2),
        'paused': False,
        'auto_managed': True,
        'duplicate_is_error': True
    }
    handle = lt.add_magnet_uri(ses, magnet, params)
    print("Downloading Metadata (this may take a while)")
    while (not handle.has_metadata()):
        try:
            sleep(1)
            print "Waiting ... "
        except KeyboardInterrupt:
            print("Aborting...")
            ses.pause()
            print("Cleanup dir " + tempdir)
            shutil.rmtree(tempdir)
            sys.exit(0)
    ses.pause()
    print("Done")
    torinfo = handle.get_torrent_info()
    torfile = lt.create_torrent(torinfo)
    output = pt.abspath(torinfo.name() + ".torrent")
    if output_name:
        if pt.isdir(output_name):
            output = pt.abspath(pt.join(output_name, torinfo.name() + ".torrent"))
        elif pt.isdir(pt.dirname(pt.abspath(output_name))):
            output = pt.abspath(output_name)
            print("Saving torrent file here : " + output + " ...")
    torcontent = lt.bencode(torfile.generate())
    f = open(output, "wb")
    f.write(lt.bencode(torfile.generate()))
    f.close()
    print("Saved! Cleaning up dir: " + tempdir)
    ses.remove_torrent(handle)
    shutil.rmtree(tempdir)
    return output

def showHelp():
    print("")
    print("USAGE: " + pt.basename(sys.argv[0]) + " MAGNET [OUTPUT]")
    print(" MAGNET\t- the magnet url")
    print(" OUTPUT\t- the output torrent file name")
    print("")

def main():
    # if len(sys.argv) < 2:
    #   showHelp()
    #   sys.exit(0)
    # magnet = sys.argv[1]
    # output_name = None
    # if len(sys.argv) >= 3:
    #   output_name = sys.argv[2]
    magnet = "magnet:?xt=urn:btih:C47C7F22ADEEDEFB6D5DACDD04F5CFAE298E0E23"
    output_name = "1.torrent"
    magnet2torrent(magnet, output_name)
    # magnet = "magnet:?dn=The.Garden.of.Words.2013.BluRay.1080p.10bit.x264.FLAC.DTS.AC3.6Audio-NYHD.mkv&tr=http%3A%2F%2Fresource.xidian.edu.cn%2Fannounce.php%3Fpasskey%3D9c0de35d732fe76d3b4fd2e8157db8b9&xl=4445065381&xt=urn%3Abtih%3A8ae7e343ae7a0ea5ceb600afc38efc0e6876c144"
    # output_name = "1.torrent"
    # magnet2torrent(magnet, output_name)

if __name__ == "__main__":
    main()