#!/usr/bin/python3

def applyfuzz(val, old, fuzz):
    if not fuzz:
        return val

    # within half of the fuzz range, return value
    if val > old - fuzz/2 and val < old + fuzz/2:
        return old

    # within 0.5 to 1.0 times fuzz, return
    if val > old - fuzz and val < old + fuzz:
        return int((old * 3 + val)/4)

    if val > old - fuzz * 2 and val < old + fuzz * 2:
        return int((old + val)/2)

    return val

def defuzz(val, fuzz):
    if val == 0:
        return 0
    if val < fuzz/2:
        return val * 4 + 1
    if val < fuzz:
        return val * 2
    else:
        return val



fuzz = 8
old = 100

for v in range(-fuzz * 3, fuzz * 3):
    val = old + v
    defuzzed = applyfuzz(val, old, fuzz)
    dv = defuzz(defuzzed, fuzz)
    #warning = '*' if val != 0 and v - dv > 3 else ''
    print((f'value {val:-3d} old_val {old:-3d}: defuzzed: {defuzzed:-3d} '
        f'delta {defuzzed - old:-3d}|{v:-3d} error: {val - defuzzed:-3d} '
        #f'unfuzzed: {dv:-3d} error: {val - dv:-3d}'
        ))

    #defuzzed: {dv} error {v - dv} {warning}')