#!/usr/bin/env python3

# Copyright (c) 2019-2020 Elliot Nunn

# 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.


HELP = '''InstaComp: unpack resources in the Macintosh System file (7.5)

Algorithm from MacOS and the Installer SDK (Apple)
Decompression reimplemented by Maxim Poliakovski

Use the 'rfx' wrapper command to access resources inside a file'''

if __name__ == '__main__':
    import struct
    import sys

    import argparse

    parser = argparse.ArgumentParser(
        description=HELP, formatter_class=argparse.RawTextHelpFormatter,
    )
    parser.prog = '[rfx] ' + parser.prog

    parser.add_argument('path', nargs='+', metavar='file', action='store', help='Resource data')
    parser.add_argument('-x', dest='do_compress', action='store_false', required=True, help='extract (currently mandatory)')

    args = parser.parse_args()

    for el in args.path:
        from macresources.instacomp import unpack, WrongFormatError

        with open(el, 'r+b') as f:
            already_compressed = (f.read(4) == b'\xA8\x9Fer')
            if not already_compressed: continue

            f.seek(0)
            data = f.read()

            print(el) # elliot delete!

            try:
                try:
                    data = unpack(data)
                except WrongFormatError:
                    continue

                f.seek(0)
                f.write(data)
                f.truncate()
            except Exception as e:
                print('failed', e)
                # print(el)
                # raise