#!/usr/bin/env python
# -*- coding: utf-8 -*-

import glob
import argparse

import Image

if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description="Generates single png strip from multiple images. Just "
                    "copy it to folder and run."
    )
    parser.add_argument("-p", "--pattern",
                        help="searching files pattern ", default="*.png")
    parser.add_argument(
        "-d", "--dest", help="destination file", default="anim.png")
    args = parser.parse_args()

    images = []
    w = 0
    h = 0
    size = None
    for g in sorted(glob.glob(args.pattern)):
        im = Image.open(g)
        images.append(im)
        h = max(h, im.size[1])
        w += im.size[0]
        if not size:
            size = im.size
        print(("appending image: '{}' with size ({}, {}) ".format(
            g, im.size[0], im.size[1])))

        if size[0] != im.size[0]:
            print(("warning! width should be {}".format(size[0])))

    if w:

        anim = Image.new("RGBA", (w, h))
        w = 0
        for im in images:
            anim.paste(im, (w, 0))
            w += im.size[0]

        print(("writing result...\nfile=\"{}\" cols=\"{}\"".format(
            args.dest, len(images))))
        anim.save(args.dest)