#!/usr/bin/python3
#
# Copyright (C) 2010, Benjamin Drung <bdrung@ubuntu.com>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

import optparse
import os
import sys

from ubuntutools.update_maintainer import (
    MaintainerUpdateException,
    restore_maintainer,
    update_maintainer,
)


def find_debian_dir(depth=6):
    """Scans up the directory hierarchy looking for a ./debian dir

    :param int depth: Levels to scan up the directory tree.
    :rtype: str
    :returns: a path to an existing debian/ directory, or None
    """
    for path in ["../" * n or "./" for n in list(range(0, depth + 1))]:
        debian_path = "{}debian".format(path)
        if os.path.exists(os.path.join(debian_path, "control")) and os.path.exists(
            os.path.join(debian_path, "changelog")
        ):
            return debian_path
    return None


def main():
    script_name = os.path.basename(sys.argv[0])
    usage = "%s [options]" % (script_name)
    epilog = "See %s(1) for more info." % (script_name)
    parser = optparse.OptionParser(usage=usage, epilog=epilog)
    parser.add_option(
        "-d",
        "--debian-directory",
        dest="debian_directory",
        help="location of the 'debian' directory (default: %default).",
        metavar="PATH",
        default=find_debian_dir() or "./debian",
    )
    parser.add_option(
        "-r",
        "--restore",
        help="Restore the original maintainer",
        action="store_true",
        default=False,
    )
    parser.add_option(
        "-q",
        "--quiet",
        help="print no informational messages",
        dest="quiet",
        action="store_true",
        default=False,
    )
    (options, args) = parser.parse_args()

    if len(args) != 0:
        print(
            "%s: Error: Unsupported additional parameters specified: %s"
            % (script_name, ", ".join(args)),
            file=sys.stderr,
        )
        sys.exit(1)

    if not options.restore:
        operation = update_maintainer
    else:
        operation = restore_maintainer

    try:
        operation(options.debian_directory, not options.quiet)
    except MaintainerUpdateException:
        sys.exit(1)


if __name__ == "__main__":
    main()