"""Hold common functions for CIP messaging."""
from datetime import datetime


def reverse_parameter_name(lower_underscore):
    """Reverse the parameter lookup process."""
    lower_split = lower_underscore.split("_")
    upper_split = [x[0].upper() + x[1:] for x in lower_split]
    return " ".join(upper_split)


def bitfield(n):
    """Distribute integer into bits."""
    binary_with_padding = "0"*32 + bin(int(n))[2:]
    binary = binary_with_padding[-32:]
    bin_array = [1 if digit == '1' else 0 for digit in binary]
    bin_array.reverse()
    return bin_array


class CIP_value(object):
    """Value of vfd parameter."""

    def __init__(self, name, units):
        """Initialize VFD Parameter."""
        self.name = name
        self.value = None
        self.timestamp = 0
        self.units = units

    def update(self, value):
        """Update the current value."""
        self.value = value
        self.timestamp = datetime.now()

    def __str__(self):
        """Represent as a string."""
        return "name: {}, value: {} {}, timestamp: {}".format(self.name, self.value, self.units, self.timestamp)