#! /usr/bin/env python3

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('  --no-loop         play animation only once')
    print('  --output OUTPUT\n')
    print('  -h                print this text')
    print('  --help')

def main():
    try:
        (opts, args) = getopt.gnu_getopt(sys.argv, 'ho:', ['help', 'output=', 'no-loop'])
        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'

    loop = '--no-loop' not in opts

    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)
            if not loop:
                break
    except KeyboardInterrupt:
        sys.exit(0)

if __name__ == "__main__":
    main()