import struct
from ubx.messages.msg import UbxMsg

class Ver(UbxMsg):
	def __init__(self):
		UbxMsg.__init__(self, 0x0A, 0x04)

	class Group1:
		@classmethod
		def from_bytes(cls, data: bytes):
			obj = Ver.Group1()
			obj.extension = data[0:30].split(b"\x00", 1)[0].decode("ascii", errors="replace")
			return obj.__dict__

	@classmethod
	def from_bytes(cls, data: bytes):
		obj = Ver()
		obj.sw_version = data[0:30].split(b"\x00", 1)[0].decode("ascii", errors="replace")
		obj.hw_version = data[30:40].split(b"\x00", 1)[0].decode("ascii", errors="replace")
		obj.extensions = []
		offset = 40
		remain = len(data) - offset
		group_size = 30
		n = offset
		while remain >= group_size:
			extension = cls.Group1.from_bytes(data[n:n + group_size])
			n += group_size
			remain -= group_size
			obj.extensions.append(extension)
		if remain:
			print(f"Ver.from_bytes: {remain} trailing bytes unparsed (payload size mismatch)")
		return obj.__dict__