"""Reading raw dora payloads, independently of what they mean."""

import numpy as np


def as_float32(storage) -> np.ndarray:
    """Read a payload as float32, whether it arrived as floats or as bytes.

    A node that sends its payload as a raw byte slice -- which is what a C++
    node does -- produces a UInt8 arrow array even though its manifest declares
    Float32, so the buffer has to be reinterpreted rather than converted.
    """
    buffer = storage.to_numpy()

    if buffer.dtype == np.uint8:
        return buffer.view(np.float32)

    return buffer.astype(np.float32, copy=False)