# -*- coding: utf-8 -*-
"""
@file   str_img_helper.py
@brief  Commanding of the star tracker image helper object which is responsible for uploading
        and downloading images to/from the star tracker.
@details    Images to uplaod must be previously transferred to the OBC with the CFDP protocol.
            Also downloaded images will be stored on the filesystem of the OBC and can be transferred via CFDP.
@author J. Meier
@date   29.11.2021
"""
import struct

from spacepackets.ecss.tc import PusTelecommand
from tmtccmd.tc import QueueHelper
from tmtccmd.utility import ObjectId


class Commands:
    UPLOAD_IMAGE = 0
    DOWNLOAD_IMAGE = 1


class ImagePathDefs:
    uploadFile = "/mnt/sd0/startracker/gemma.bin"


def pack_str_img_helper_command(object_id: ObjectId, q: QueueHelper, op_code: str):
    q.add_log_cmd(
        f"Testing star tracker image helper object id: {object_id.as_hex_string}"
    )
    if op_code == "0":
        q.add_log_cmd("Star tracker image helper: Upload image")
        command = (
            object_id.as_bytes
            + struct.pack("!I", Commands.UPLOAD_IMAGE)
            + bytearray(ImagePathDefs.uploadFile, "utf-8")
        )
        q.add_pus_tc(PusTelecommand(service=8, subservice=128, app_data=command))