#!/usr/bin/env python

import os, sys, argparse, os.path, json, unpixelterm
#NOTE: This script uses pygments for X256->RGB conversion since pygments is
#readily available. If you do not like pygments (e.g. because it is large),
#you could patch in something like https://github.com/magarcia/python-x256
#(but don't forget to send me a pull request ;)
from pygments.formatters import terminal256
from PIL import Image, PngImagePlugin
try:
	import re2 as re
except:
	import re

if __name__ == '__main__':
	parser = argparse.ArgumentParser(description='Convert images rendered by pixelterm-like utilities back to PNG')
	parser.add_argument('-v', '--verbose', action='store_true')
	output_group = parser.add_mutually_exclusive_group()
	output_group.add_argument('-o', '--output', type=str, help='Output file name, defaults to ${input%.pony}.png')
	output_group.add_argument('-d', '--output-dir', type=str, help='Place output files here')
	parser.add_argument('input', type=argparse.FileType('r'), nargs='+')
	args = parser.parse_args()
	if len(args.input) > 1 and args.output:
		parser.print_help()
		print('You probably do not want to overwrite the given output file {} times.'.format(len(args.input)))
		sys.exit(1)

	for f in args.input:
		if len(args.input) > 1:
			print(f.name)
		img, metadata = unpixelterm.unpixelterm(f.read())
		pnginfo = PngImagePlugin.PngInfo()
		pnginfo.add_text('pixelterm-metadata', json.dumps(metadata))
		foo, _, _ = f.name.rpartition('.pony')
		output = args.output or foo+'.png'
		if args.output_dir:
			output = os.path.join(args.output_dir, os.path.basename(output))
		img.save(output, 'PNG', pnginfo=pnginfo)