#!/usr/bin/env python
"""
Simple sms-sender via LittleSMS
---------------------------------

You must specify your ``USER_EMAIL`` and ``USER_APIKEY`` below.

Examples::

    $ sendsms.py --recipients=79117654321,79317654321 --message="Some message"
    ... or so ...
    $ echo "Some message" | sendsms.py --recipients=79117654321,79317654321

"""
DEFAULT_SENDER = "MONITOR"  # Name of sender
SEND_URL = "https://littlesms.ru/api/message/send"
USER_EMAIL = ""
USER_APIKEY = ""

import sys
import json
import argparse
import urllib
import urllib2


def sendsms(recipients, sender, message, read_bytes, debug=False):
    if not message:
        message = sys.stdin.read(read_bytes)
    params = {
        'user': USER_EMAIL,
        'apikey': USER_APIKEY,
        'recipients': recipients,
        'sender': sender,
        'message': message,
        'test': int(debug),
    }
    request = urllib2.urlopen(urllib2.Request(SEND_URL + "?" + urllib.urlencode(params)))
    result = json.loads(request.read())
    if result['status'] != "success":
        error_message = "ServiceError: {0}".format(result['message']) if result['status'] == "error" else "Service is not responsible"
        raise Exception(error_message)
    return True

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Simple sms-sender. '
                                     'Send sms via service LittleSMS')
    parser.add_argument('-R', '--recipients', dest='recipients', type=str, required=True,
                        help='Comma-separated numbers, an example of "79117654321" '
                        'or "79117654321,79317654321", etc.')
    parser.add_argument('-S', '--sender', dest='sender', type=str, default=DEFAULT_SENDER,
                        help='Sender\'s name or phone number, etc.')
    parser.add_argument('-M', '--message', dest='message', type=unicode,
                        help='The some message. If you omit this argument, '
                        'read from stdin.')
    parser.add_argument('--read-bytes', dest='read_bytes', type=int, default=256,
                        help='Defaults to read the first 256 bytes of message, '
                        'but this can be changed. Example "--read-bytes=1024".')
    parser.add_argument('--debug', dest='debug', action='store_true',
                        help='Debug mode. If True, then simulates the function, '
                        'sms send to service, but send to final recipients '
                        'is not performed.')
    args = parser.parse_args()
    sendsms(args.recipients, args.sender, args.message, args.read_bytes, args.debug)