"""Set all repositories of a given GitHub organization name for a given user
to watching.
"""

import argparse
import json
import requests


def get_repos(url, repo_list=[], auth=None):
    req = None
    if auth:
        req = requests.get(url, auth=auth)
    else:
        req = requests.get(url)
    if (req.ok):
        repos = json.loads(req.text or req.content)
        repo_list += repos
        links = getattr(req, 'links', None)
        if links and 'next' in links and 'url' in links['next']:
            get_repos(links['next']['url'], repo_list=repo_list, auth=auth)
    return repo_list


def main(user, password, org_name, outfile):
    auth = (user, password)
    repo_url = 'https://api.github.com/orgs/{0}/repos'.format(org_name)
    headers = {'Content-Type': 'application/json; charset=UTF-8'}

    repo_list = get_repos(repo_url, auth=auth)

    lines = []
    with open(outfile) as f:
        f.seek(0)
        lines = [it.strip('\n').strip('\r') for it in f]
    with open(outfile, 'a') as f:
        for repo in repo_list:
            repo_name = repo['name']
            if repo_name in lines:
                continue
            url = 'https://api.github.com/repos/{0}/{1}/subscription'.format(
                org_name,
                repo_name
            )
            res = requests.put(
                url=url,
                data='{"subscribed": "1"}',
                headers=headers,
                auth=auth
            )
            if res.status_code == 200:
                f.write('{0}\n'.format(repo_name))
                print('status {0} | repo {1}'.format(
                    res.status_code,
                    repo_name
                ))
            else:
                print('ERRORE! status {0} | repo {1}'.format(
                    res.status_code,
                    repo_name
                ))


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Watch/unwatch GitHub Repositories', version='%(prog)s 1.0')  # noqa
    parser.add_argument('user',      type=str, help='GitHub username')
    parser.add_argument('password',  type=str, help='GitHub password')
    parser.add_argument('org_name',  type=str, help='GitHub organization name')
    parser.add_argument('--outfile', type=str, default='repos_set.txt', help='Name of the file to write each successful changed repository to. Used for avoiding unnecessart API calls.')  # noqa
    args = parser.parse_args()
    main(**vars(args))