import csv
import sys

STEP_CHANNEL = 2
DIR_CHANNEL = 1

STEPS_PER_MM = 395

step_state = 0
dir_state = 0

rev_step_count = 0
fwd_step_count = 0
step_count = 0

with open(sys.argv[1], 'r') as csvfile:
    reader = csv.reader(csvfile)

    next(reader) # skip header
    for row in reader:
        dir_state = int(row[DIR_CHANNEL+1].strip())

        new_step_state = int(row[STEP_CHANNEL+1].strip())

        if new_step_state and not step_state:
            if dir_state:
                fwd_step_count += 1
            else:
                rev_step_count += 1
        step_state = new_step_state

        #print dir_state, step_state


print("fwd_count %u\nrev_count %u\nnet_count %d\nmm %f" % (fwd_step_count, rev_step_count, fwd_step_count-rev_step_count, (fwd_step_count-rev_step_count)/float(STEPS_PER_MM)))