#!/usr/bin/env python3
# encoding: utf-8
"""Create a markdown list of authors for a particular repository.

    python create_authors_list.py -u djhoese -r satpy

Requires the pygithub package.

"""
import getpass
import logging
import os
import sys
from datetime import datetime

from github import Github

LOG = logging.getLogger(__name__)
EXCLUDE_REPOS = ['aggdraw']

def get_all_pytroll_contributors(user, repos=None):
    if repos is None:
        repos = []
    g = Github(user, getpass.getpass('GitHub Password: '))
    pytroll_org = g.get_organization('pytroll')
    LOG.info("Getting all PyTroll repositories...")
    pytroll_repos = [x for x in pytroll_org.get_repos()
            if (not repos and x.name not in EXCLUDE_REPOS) or x.name in repos]
    LOG.info("Getting all PyTroll contributors...")
    all_pytroll_contributors = [
        u for r in pytroll_repos for u in r.get_contributors()]
    set_pytroll_contributors = {u.login: u for u in all_pytroll_contributors}
    return set_pytroll_contributors


def main():
    import argparse
    parser = argparse.ArgumentParser(
        description="Create a list of repository authors")
    parser.add_argument('-o', '--output', default='authors_{:%Y%m%d_%H%M%S}.md',
                        help='Output filename to save the image to')
    parser.add_argument('-u', '--github-user', required=True,
                        help='github username')
    parser.add_argument('-r', '--repos', required=True, nargs='+',
                        help='repository to get authors for')
    args = parser.parse_args()

    logging.basicConfig(level=logging.INFO)

    LOG.info("Getting PyTroll contributors...")
    contributors = get_all_pytroll_contributors(args.github_user, args.repos)
    LOG.info("Getting all PyTroll contributor info...")
    all_user_info = []
    for user in contributors.values():
        all_user_info.append((user.login, user.name, user.html_url))
    # sort by name
    all_user_info = sorted(all_user_info, key=lambda x: (x[1] and x[1].split(' ')[-1]) or x[0])

    now = datetime.utcnow()
    output = args.output.format(now)
    LOG.info("Writing output file: {}".format(output))
    with open(output, 'w') as out_file:
        for user_id, user_name, user_url in all_user_info:
            out_file.write("- [{} ({})]({})\n".format(user_name or user_id, user_id, user_url))

if __name__ == "__main__":
    sys.exit(main())