#!/usr/bin/env python3
#
# Rotate tiles
# Copyright (C) 2023 by Juan J. Martinez <jjm@usebox.net>
#
# 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.

__version__ = "1.0"

import sys
from argparse import ArgumentParser
from itertools import chain

try:
    from PIL import Image
except ImportError:
    sys.exit("Please install PIP (or pillow)")


def main():

    parser = ArgumentParser(
        description="Rotate tiles",
        epilog="Copyright (C) 2023 Juan J Martinez <jjm@usebox.net>",
    )

    parser.add_argument(
        "--version", action="version", version="%(prog)s " + __version__
    )

    parser.add_argument("image", help="image to convert")
    parser.add_argument("width", help="witdth of the tiles", type=int)
    parser.add_argument("height", help="height of the tiles", type=int)
    parser.add_argument("dest", help="destination image")

    args = parser.parse_args()

    try:
        image = Image.open(args.image)
    except IOError:
        parser.error("failed to open the image")

    (w, h) = image.size

    if w % args.width or h % args.height:
        parser.error("%s size is not multiple of the tile size" % args.image)

    data = list(image.convert("RGB").getdata())

    ntiles = 0
    out = []
    for base_y in range(0, h, args.height):
        for x in range(0, w, args.width):
            tile = []
            for y in range(base_y, base_y + args.height):
                tile.extend(data[x + y * w : x + y * w + args.width])
            out.extend(tile)
            ntiles += 1

    out_data = list(chain.from_iterable(out))
    result = Image.frombytes("RGB", (args.width, args.height * ntiles), bytes(out_data))
    with open(args.dest, "wb") as fd:
        result.save(fd)


if __name__ == "__main__":
    main()