import ctypes

# Minimal placeholders for nested datatypes used by tracked target messages
class RelativeTimetag(ctypes.Union):
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_uint16)]

class TargetXDisplayCoordinate(ctypes.Union):
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_int16)]

class TargetYDisplayCoordinate(ctypes.Union):
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_int16)]

class TargetIdentifier(ctypes.Union):
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_uint32)]

class TrackValidityAndStatusWord1(ctypes.Union):
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_uint16)]

class TrackValidityAndStatusWord2(ctypes.Union):
    _pack_ = 1
    _fields_ = [("raw", ctypes.c_uint16)]

class TrackedTarget02_10(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("track_validity_and_status_word_1", TrackValidityAndStatusWord1),
        ("track_validity_and_status_word_2", TrackValidityAndStatusWord2),
        ("time_tag", RelativeTimetag),
        ("target_range", ctypes.c_uint16),
        ("normalized_target_position_x", ctypes.c_int16),
        ("normalized_target_position_y", ctypes.c_int16),
        ("normalized_target_position_z", ctypes.c_int16),
        ("target_range_rate", ctypes.c_int16),
        ("target_velocity", ctypes.c_uint16),
        ("target_velocity_x", ctypes.c_int16),
        ("target_velocity_y", ctypes.c_int16),
        ("target_velocity_z", ctypes.c_int16),
        ("target_acceleration", ctypes.c_uint16),
        ("target_acceleration_x", ctypes.c_int16),
        ("target_acceleration_y", ctypes.c_int16),
        ("target_acceleration_z", ctypes.c_int16),
        ("target_aspect_angle", ctypes.c_int16),
        ("target_cas", ctypes.c_uint16),
        ("target_mach_number", ctypes.c_uint16),
        ("target_x_display_coordinate", TargetXDisplayCoordinate),
        ("target_y_display_coordinate", TargetYDisplayCoordinate),
        ("standard_deviation_of_position_x_estimate", ctypes.c_uint16),
        ("standard_deviation_of_position_y_estimate", ctypes.c_uint16),
        ("standard_deviation_of_position_z_estimate", ctypes.c_uint16),
        ("reserved_word_1", ctypes.c_int16),
        ("reserved_word_2", ctypes.c_int16),
        ("target_identifier", TargetIdentifier),
    ]

class TrackedTarget01(TrackedTarget02_10):
    _pack_ = 1
    _fields_ = TrackedTarget02_10._fields_ + [
        ("validity_word_and_hpt_identifier", ctypes.c_uint16),
        ("track_priority_01_to_04", ctypes.c_uint16),
        ("track_priority_05_to_08", ctypes.c_uint16),
        ("track_priority_09_to_10", ctypes.c_uint16),
    ]