#!/usr/bin/env python3

# Usage: git setmail
#
# Configuration format:
#   [
#     {
#       "match": ".*",
#       "email": "mymail@example.com",
#       "signingkey": "...",
#     }
#   ]

import sys
import re
import subprocess
import os.path
import json

CONFIG = os.path.expanduser('~/.config/git-committerconfig.json')


def main():
    try:
        repo = [x.split()[1] for x
                in subprocess.check_output(['git', 'remote', '-v'], universal_newlines=True).split('\n')
                if re.match('origin.*\(push\)', x)][0]
    except:
        print('Could not find origin, not setting local git configuration.')
        return 0

    if os.path.isfile(CONFIG):
        combinations = json.loads(open(CONFIG).read())
    else:
        print('Config ({}) found.'.format(CONFIG))
        return 1

    for combi in combinations:
        if re.search(combi['match'], repo):
            set_local_config('user.email', combi['email'])

            if 'signingkey' in combi and combi['signingkey'] != '':
                set_local_config('user.signingkey', combi['signingkey'])
                set_local_config('gpg.format', 'ssh' if re.search(
                    r'^(?:ssh|ecdsa)', combi['signingkey']) else 'openpgp')

            if 'commit-opts' in combi:
                set_local_config('commit.cliopts', combi['commit-opts'])

            break

    return 0


def set_local_config(param, value):
    subprocess.check_call(['git', 'config', '--local', param, value])


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