#!/usr/bin/python

import sys
import getopt

import blup.animation
import blup.output

def printUsage(errMsg=None):
	if errMsg is not None:
		print('error: %s\n' % (errMsg))
	print('usage: %s [OPTIONS] FILENAME' % (sys.argv[0]))
	print('supported options:')
	print('  -o OUTPUT         where to output the frames (default: shell)')
	print('  --output OUTPUT\n')
	print('  -h                print this text')
	print('  --help')

def main():
	try:
		(opts, args) = getopt.gnu_getopt(sys.argv, 'ho:', ['help', 'output='])
		opts = dict(opts)
	except getopt.GetoptError as e:
		printUsage(e.msg)
		sys.exit(1)

	if '--help' in opts:
		printUsage()
		sys.exit(0)

	if '-o' in opts:
		output = opts['-o']
	elif '--output' in opts:
		output = opts['--output']
	else:
		output = 'shell'

	try:
		out = blup.output.getOutput(output)
	except blup.output.IllegalOutputSpecificationError:
		print('illegal output specification')
		print('available outputs:')
		print(blup.output.getOutputDescriptions())
		sys.exit(1)
	except Exception as e:
		print('could not initialize output: %s' % (str(e)))
		sys.exit(1)
	
	if len(args) != 2:
		printUsage()
		sys.exit(1)

	try:
		anim = blup.animation.load(args[1])
	except blup.animation.AnimationFileError:
		print('could not load animation')
		sys.exit(1)

	player = blup.animation.AnimationPlayer()
	try:
		while True:
			player.play(anim, out)
	except KeyboardInterrupt:
		sys.exit(0)

if __name__ == "__main__":
	main()