#!/usr/bin/env python

import argparse
import os.path
import requests
import sys

parser = argparse.ArgumentParser(description='paste a file to gist')
parser.add_argument('filename', metavar='file', type=str, nargs='?',
        help='file to paste; if not specified, read from stdin')
parser.add_argument('--language', '-l', dest='language',
        help='the language to use (default: Text if stdin, autodetect based on extension otherwise)')

args = parser.parse_args()

if args.filename is None:
    args.filename = ''
    f = sys.stdin
    if args.language is None:
        args.language = 'text'
else:
    f = open(args.filename, 'r')
    args.filename = os.path.basename(args.filename)
    if args.language is None:
        r = requests.get('https://gist.github.com/languages/detect', params={'name': args.filename})
        language = r.json()['languages'][0]
        args.language = language.lower()

content = f.read()
data = {
    'code': content,
    'lexer': args.language,
    'expiry': '1week',
}
r = requests.post('https://bpaste.net/', data=data, allow_redirects=False)
if 'location' in r.headers:
    print r.headers['location']
else:
    print r.headers['status']