from argparse import ArgumentParser
import json, sys

try:
    # python2
    from urllib.request import urlopen
    from urllib.error import URLError, HTTPError
    from urllib.parse import urlencode
except ImportError:
    # python3
    from urllib.parse import urlencode, quote
    from urllib.request import urlopen, URLError, HTTPError

import requests


LIMIT_BYTES = 100*1000

def main(args):
    p = ArgumentParser("calls the getText API function for the given padid")
    p.add_argument("padid", help="the padid")
    p.add_argument("--text", default=None, help="text, default: read from stdin")
    p.add_argument("--padinfo", default=".etherpump/settings.json", help="settings, default: .etherdump/settings.json")
    p.add_argument("--showurl", default=False, action="store_true")
    # p.add_argument("--format", default="text", help="output format, can be: text, json; default: text")
    p.add_argument("--create", default=False, action="store_true", help="flag to create pad if necessary")
    p.add_argument("--limit", default=False, action="store_true", help="limit text to 100k (etherpad limit)")
    args = p.parse_args(args)

    with open(args.padinfo) as f:
        info = json.load(f)
    apiurl = info.get("apiurl")
    # apiurl = "{0[protocol]}://{0[hostname]}:{0[port]}{0[apiurl]}{0[apiversion]}/".format(info)
    data = {}
    data['apikey'] = info['apikey']
    data['padID'] = args.padid # is utf-8 encoded

    createPad = False
    if args.create:
        requesturl = apiurl+'getRevisionsCount?'+urlencode(data)
        results = json.load(urlopen(requesturl))
        # print (json.dumps(results, indent=2))
        if results['code'] != 0:
            createPad = True

    if args.text:
        text = args.text
    else:
        text = sys.stdin.read()

    if len(text) > LIMIT_BYTES and args.limit:
        print ("limiting", len(text), LIMIT_BYTES)
        text = text[:LIMIT_BYTES]

    data['text'] = text

    if createPad:
        requesturl = apiurl+'createPad'
    else:
        requesturl = apiurl+'setText'

    if args.showurl:
        print (requesturl)
    results = requests.post(requesturl, params=data) # json.load(urlopen(requesturl))
    results = json.loads(results.text)
    if results['code'] != 0:
        print ("setText: ERROR ({0}) on pad {1}: {2}".format(results['code'], args.padid, results['message']))
        # json.dumps(results, indent=2)