#!/usr/bin/python3
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# Author: Kevin Watts


# Make any csv into sparse csv


PKG = 'diagnostic_analysis'
import roslib
roslib.load_manifest(PKG)

import csv, os, sys
from optparse import OptionParser

from diagnostic_analysis.sparse import make_sparse_skip, make_sparse_length

if __name__=='__main__':
    # Allow user to set output directory
    parser = OptionParser()
    parser.add_option("-l", "--length", dest="length",
                      help="Set length of output CSV", metavar="LEN",
                      default=None, action="store")
    parser.add_option("-s", "--skip", dest="skip",
                      help="Skip every nth row. If length set, will ignore this value.", 
                      metavar="SKIP", default=10, action="store")
    parser.add_option("-m", "--max", dest="max", 
                      help="Make largest possible file for Open Office (65k lines). If selected, other options ignored.",
                      metavar="MAX", default=False, action="store_true")

    options, args = parser.parse_args()

    # Get CSV file
    if len(args) < 1:
        print('No CSV file given.')
        sys.exit(0)

    csv_file = args[0]

    if not csv_file.endswith('.csv'):
        print('File %s is not a CSV file. Aborting.' % csv_file)
        sys.exit(0)

    if options.max:
        output_file = make_sparse_length(csv_file, 65000)
    elif options.length is None:
        output_file = make_sparse_skip(csv_file, options.skip)
    else:
        output_file = make_sparse_length(csv_file, int(options.length))

    print('Created sparse CSV %s' % output_file)
