import os
import sys
import shutil
import struct


def update_file(path, list_value):
    content = bytes()
    for value in list_value:
        content = content + value
    if os.path.exists(path):
        file    = open(path, mode='rb')
        content = content + file.read()
        file.close()

        file = open(os.path.dirname(path) + '/pack.app', mode='wb')
        file.write(content)
        file.close()
    else:
        print('Error: ' + path + ' is not exists.')

if __name__ == '__main__':
    root       = os.path.dirname(os.path.realpath(__file__)) + '/../../../'
    path       = root + 'PLAT/appsdk_dyn/main.bin'

    name       = b'app0' + bytes(4)
    size       = struct.pack('I', os.path.getsize(path))
    reserved_0 = bytes(4)
    reserved_1 = bytes(16)
    list_value = [name, size, reserved_0, reserved_1]

    textOffset     = bytes(4)
    textSize       = bytes(4)
    textRelocation = bytes(4)

    dataOffset     = bytes(4)
    dataSize       = bytes(4)
    dataRelocation = bytes(4)

    resourceOffset     = bytes(4)
    resourceSize       = bytes(4)
    resourceRelocation = bytes(4)

    reserved3 = bytes(12)

    list_value = [name, size, reserved_0, reserved_1, textOffset, textSize, textRelocation, dataOffset, dataSize, dataRelocation, resourceOffset, resourceSize, resourceRelocation, reserved3]

    update_file(path, list_value)
    print('End')