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#######################################################
#
# InfoSegment.py
# Python implementation of the Class InfoSegment
# Generated by Enterprise Architect
# Created on:      14-Aug-2019 10:11:57 AM
# Original author: talve
#
#######################################################
from segments.Segment import Segment
from segments.SegmentFactory import SegmentFactory
from resourcedump_lib.utils import constants

import struct
import sys


class InfoSegment(Segment):
    """this class is responsible for holding info segment data.
    """

    _segment_type_id = constants.RESOURCE_DUMP_SEGMENT_TYPE_INFO
    INFO_SEGMENT_FMT_BE = "3sBII"
    INFO_SEGMENT_FMT_LE = "B3sII"

    info_segment_struct = struct.Struct(INFO_SEGMENT_FMT_BE if sys.byteorder == 'big' else INFO_SEGMENT_FMT_LE)

    def __init__(self, data):
        """initialize the class by setting the class data.
        """
        super().__init__(data)

    def get_version(self):
        start = self.segment_header_struct.size
        if len(self.raw_data) > start:
            dump_version, hw_version, fw_version = self.unpack_info()
            return "{}.{}.{}".format(dump_version, hw_version, fw_version)
        return ""

    def unpack_info(self):
        fields = self.info_segment_struct.unpack_from(self.raw_data, self.segment_header_struct.size)
        dump_version = fields[1] if sys.byteorder == 'big' else fields[0]
        hw_version, fw_version = fields[2:]
        return dump_version, hw_version, fw_version


SegmentFactory.register(constants.RESOURCE_DUMP_SEGMENT_TYPE_INFO, InfoSegment)
