#!python

'''Convert a C3D file to CSV (text) format.'''

from __future__ import print_function

import c3d
import climate
import sys

climate.add_arg('-a', '--include-analog', action='store_true',
                help='output analog values after point positions')
climate.add_arg('-c', '--include-camera', action='store_true',
                help='output camera count with each point position')
climate.add_arg('-r', '--include-error', action='store_true',
                help='output error value with each point position')
climate.add_arg('-e', '--end', default='\\n', metavar='K',
                help='write K between records')
climate.add_arg('-s', '--sep', default=',', metavar='C',
                help='write C between fields in a record')

climate.add_arg('input', default='-', metavar='FILE', nargs='+',
                help='process data from this input FILE')


def convert(filename, args, sep, end):
    input = sys.stdin
    output = sys.stdout
    if filename != '-':
        input = open(filename, 'rb')
        output = open(filename.replace('.c3d', '.csv'), 'w')
    for frame_no, points, analog in c3d.Reader(input).read_frames(copy=False):
        fields = [frame_no]
        for x, y, z, err, cam in points:
            fields.append(str(x))
            fields.append(str(y))
            fields.append(str(z))
            if args.include_error:
                fields.append(str(err))
            if args.include_camera:
                fields.append(str(cam))
        if args.include_analog:
            fields.extend(str(x) for x in analog.flatten())
        print(*fields, sep=sep, end=end, file=output)


def main(args):
    sep = args.sep.replace('\\t', '\t').replace('TAB', '\t')
    end = args.end.replace(
        '\\r', '\r').replace('CR', '\r').replace(
        '\\n', '\n').replace('NL', '\n')
    for filename in args.input:
        convert(filename, args, sep, end)


if __name__ == '__main__':
    climate.call(main)
