#!/usr/bin/env python3

import requests
from uuid import uuid4
from os import urandom
from random import randint
from time import sleep


APP_ID = str(uuid4())  # Located in /usr/share/remarkable/update.conf
BOOT_ID = str(uuid4())  # Located in /proc/sys/kernel/random/boot_id
SERIAL_ID = 'RM100-123-12345'  # Back of your device

URL = 'https://get-updates.cloud.remarkable.engineering/service/update2'
BODY = '<?xml version="1.0" encoding="UTF-8"?>\n<request protocol="3.0" version="1.8.1.1" requestid="{%s}" sessionid="{%s}" updaterversion="0.4.2" installsource="ondemandupdate" ismachine="1">\n    <os version="zg" platform="reMarkable" sp="1.8.1.1_armv7l" arch="armv7l"></os>\n    <app appid="{%s}" version="1.8.1.1" track="Prod" ap="Prod" bootid="{%s}" oem="%s" oemversion="1.1" alephversion="1.8.1.1" machineid="%s" lang="en-US" board="" hardware_class="" delta_okay="false" nextversion="0.0.0" brand="" client="" >\n        <ping active="1"></ping>\n        <updatecheck></updatecheck>\n        <event eventtype="3" eventresult="2" previousversion=""></event>\n    </app>\n</request>\n'


def probe() -> bool:
    uuid1, uuid2 = str(uuid4()), str(uuid4())
    machineid = urandom(16).hex()
    filledBody = BODY % (uuid1, uuid2, APP_ID, BOOT_ID, SERIAL_ID, machineid)
    response = requests.post(URL, data=filledBody)
    assert(response.ok)
    #print(response.content)
    return machineid, b'<updatecheck status="noupdate"/>' not in response.content, response.content


def autoprobe(delay=0.5, maxExtra=0.3):
    while 1:
        sleep(delay + (randint(1, int(maxExtra*1000)) / 1000))

        mid, success, content = probe()
        if not success:
            print('Failed: %s' % mid)
        else:
            print('SUCCESS!!!')
            print('MACHINE ID: %s' % mid)
            print('RESPONSE: ')
            print('%s' % content)
            exit(0)