import ctypes
from ..datatypes.navigation import Semicircle
from ..datatypes.enums import RdrModes

class RdrModeCommandBits(ctypes.LittleEndianStructure):
    """Bitfield structure for Radar Mode Command Word."""
    _pack_ = 1
    _fields_ = [
        ("spare", ctypes.c_uint16, 1),
        ("transfer_feature_bug", ctypes.c_uint16, 1),
        ("sar_type", ctypes.c_uint16, 1),
        ("silence", ctypes.c_uint16, 1),
        ("reserved11", ctypes.c_uint16, 1),
        ("stop_powerup", ctypes.c_uint16, 1),
        ("freeze", ctypes.c_uint16, 1),
        ("stby", ctypes.c_uint16, 1),
        ("ibit", ctypes.c_uint16, 1),
        ("des_ctrl", ctypes.c_uint16, 3),
        ("master_mode", ctypes.c_uint16, 4),
    ]
    
    _enums_ = {
        "master_mode": RdrModes
    }

class RdrModeCommandWord(ctypes.Union):
    """Radar Mode Command Word (16 bits)."""
    _pack_ = 1
    _fields_ = [
        ("raw", ctypes.c_uint16),
        ("bits", RdrModeCommandBits)
    ]

class RdrFunAndParam1(ctypes.Union):
    """Function and Parameter 1 (placeholder for now)."""
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_uint16)]

class RdrFunAndParam2(ctypes.Union):
    """Function and Parameter 2 (placeholder for now)."""
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_uint16)]

class MsgA2Payload(ctypes.Structure):
    """
    Payload structure for Message A2: Radar Operation Command.
    """
    _pack_ = 1
    _fields_ = [
        ("rdr_mode_command", RdrModeCommandWord),
        ("param1", RdrFunAndParam1),
        ("param2", RdrFunAndParam2),
    ]

    # Rimosso __init__ - ctypes.Structure gestisce automaticamente l'inizializzazione