#!/usr/bin/env python

# bastetscore - Modify the high score list for bastet (Bastard Tetris)
# Copyright (C) 2007 Lenny Domnitser
# 
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

import os
import struct


FORMAT = '12sI' * 10
SCORES_FILE = '/var/games/bastet.scores'


def decode(data):
    unpacked_data = struct.unpack(FORMAT, data)
    decoded_data = []
    for c in xrange(0, 20, 2):
        name = unpacked_data[c].rstrip('\0')
        score = unpacked_data[c+1]
        decoded_data.append((name, score))
    return decoded_data


def encode(decoded_data):
    unpacked_data = reduce(lambda a, b: a + b, decoded_data)
    data = struct.pack(FORMAT, *unpacked_data)
    return data


def test():
    # sanity test
    data = open(SCORES_FILE).read()
    assert data == encode(decode(data))


def main():
    data = open(SCORES_FILE).read()
    decoded_data = decode(data)
    new_decoded_data = []
    c = 1
    for name, score in decoded_data:
        print '%2d. %s: %s' % (c, name, score)
        print '    New name:',
        name = raw_input()
        while True:
            try:
                print '    New score:',
                score = int(raw_input())
                break
            except ValueError:
                print '    invalid score'
        print
        new_decoded_data.append((name, score))
        c += 1
    data = encode(new_decoded_data)
    filename = os.path.join(os.environ.get('TMP', '/tmp'), 'bastet.scores')
    open(filename, 'wb').write(data)
    print 'Wrote scores to %s. To use this file, move it to %s.' % (filename, SCORES_FILE)


if __name__ == '__main__':
    test()
    main()