from dataclasses import dataclass
import struct
from time import sleep
from typing import Self
import hid

VID = 0x1209
PID = 0xCC1D
INTERVAL = 0.1


@dataclass
class AudioTelemetry:
    STRUCT = "<LLLLL"
    LEN = struct.calcsize(STRUCT)

    average_buffer_fill: int
    frame_count: int
    dac_underflow_count: int
    usb_underflow_count: int
    dac_overflow_count: int

    def from_bytes(b: bytes) -> Self:
        if len(b) != AudioTelemetry.LEN:
            raise ValueError(f"wrong size report ({len(b)} != {AudioTelemetry.LEN})")
        fields = struct.unpack(AudioTelemetry.STRUCT, b)
        return AudioTelemetry(*fields)


def main():
    with hid.Device(VID, PID) as h:
        while True:
            report = AudioTelemetry.from_bytes(h.read(AudioTelemetry.LEN))
            print(f"{report}")
            sleep(INTERVAL)


if __name__ == "__main__":
    main()