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#######################################################
#
# ResourceParser.py
# Created on:      12-Jun-2023 11:13:33 AM
# Original author: astrutsovsky
#
#######################################################

from resourceparse_lib.utils import constants as cs
from resourceparse_lib.utils.common_functions import is_resource_segment
from resourceparse_lib.parsers.ResourceParser import ResourceParser, PARSER_CLASSES

import struct


class AddressValueParser(ResourceParser):
    PARSER_TYPE = "map"

    address_value_struct = struct.Struct('II')

    def __init__(self, parser_args):
        pass

    def parse_segment(self, segment):
        if is_resource_segment(segment.get_type()):
            data_start_position = cs.RESOURCE_SEGMENT_START_OFFSET_IN_DW * cs.DWORD_SIZE
            payload_data = segment.get_data()[data_start_position:]

            remainder = len(payload_data) % (2 * cs.DWORD_SIZE)

            if remainder > 0:
                segment.add_parsed_data("# Warning: {}".format(cs.WARNING_WRONG_PAIR_SIZE))

            for address, value in self.address_value_struct.iter_unpack(payload_data[:len(payload_data) - remainder]):
                segment.add_parsed_data("0x{:08x} 0x{:08x}".format(address, value))

    def validate(self):
        return super().validate()

    @staticmethod
    def get_description():
        return \
            """        This parse method assumes that the provided resource-segments represents a memory map
        by dword pairs of address-value, and outputs each pair in a new line (similar to mstdump).
"""


PARSER_CLASSES[AddressValueParser.PARSER_TYPE] = AddressValueParser