from ctypes import string_at
from sys import getsizeof
from binascii import hexlify


# def decode_num(self, encode_num):
#     decoded_value = encode_num.decode()
#     return decoded_value
#
#
# def encode_num(self, number):
#     # rnd = random.SystemRandom().randrange(1, self.max_int)
#     encoded_value = FixedPointNumber.encode(number, self.n, self.max_int, precision=None)
#     return encoded_value

def encoding(number, bit_lenth=32):

    # type(number) = int
    if isinstance(number, int):
        int_bit_list = [0 for x in range(bit_lenth)]
        abs_number = abs(number)
        for i in range(bit_lenth):
            bit = abs_number & 1
            abs_number = abs_number >> 1
            int_bit_list[i] = bit
        int_bit_list.reverse()
        if number < 0:
            int_bit_list[0] = 1
        else:
            int_bit_list[0] = 0
        return int_bit_list

    # type(number) = float
    elif isinstance(number, float):
        buffer = hexlify(string_at(id(number), getsizeof(number)))
        buffer_float = buffer[len(buffer) - 16:]
        temp = [buffer_float[i:i + 2] for i in range(0, len(buffer_float), 2)]
        flt_bin_list = ''.join([bin(int(temp[i].decode(), 16))[2:].rjust(8, '0')
                                     for i in range(len(temp) - 1, -1, -1)])
        flt_bin_list = list(map(int, flt_bin_list))
        return flt_bin_list

    else:
        raise TypeError("Don't know the precision of type %s." % type(number))

if __name__ == '__main__':
    enc_result = encoding(-0.5)
    print(encoding(0.5))
    print(enc_result)
    print(len(enc_result))