#! /usr/bin/env python

# This file is part of release-path
#
#Copyright (c) 2012 Wireless Generation, Inc.
#
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.

import sys
import logging
from argparse import ArgumentParser
from simpleversions import Version
from release_path import release_branches, merge_branches
from git import Repo

def argparser():
    parser = ArgumentParser()
    parser.add_argument('--no-push', dest='push', action='store_false',
                        default=True)
    parser.add_argument('--push', dest='push', action='store_true',
                        default=True)
    parser.add_argument('--extra-branches', nargs='*', default=[])
    parser.add_argument('--remote', default='origin')
    parser.add_argument('--no-fetch', dest='fetch', action='store_false',
                        default=True)
    parser.add_argument('--fetch', dest='fetch', action='store_true',
                        default=True)
    parser.add_argument('--max-branch', type=Version, default=None)
    parser.add_argument('--min-branch', type=Version, default=None)
    parser.add_argument('--branch-prefix', default='release_')
    parser.add_argument('--branch-suffix', default='')
    return parser


def main():
    logging.basicConfig(level=logging.INFO)
    args = argparser().parse_args()
    repo = Repo()

    if args.fetch:
        repo.git.fetch()

    repo.git.remote('prune', args.remote)

    def valid_branch(branch):
        branch_version = Version(branch)
        return ((not args.min_branch or branch_version >= args.min_branch) and
                (not args.max_branch or branch_version <= args.max_branch))


    branches = sorted(release_branches(repo, args.remote, args.branch_prefix,
                                       args.branch_suffix), key=Version)
    branches = [branch for branch in branches if valid_branch(branch)]
    branches.extend(args.extra_branches)

    failed_merges = merge_branches(repo, branches, args.remote, args.push,
                                   args.fetch)

    if failed_merges:
        logging.info("The following merges failed:")
        for from_branch, to_branch in failed_merges:
            logging.info('->'.join([from_branch, to_branch]))
            logging.info('Commits:')
            for log_line in repo.git.log("%s..%s" % (to_branch, from_branch),
                                         '--format=%h - %an - %s').split('\n'):
                logging.info('    ' + log_line)
        return 1

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