#!/usr/bin/python3
import logging
import argparse
import time
import signal
import sys
import toml
import requests
import os

import pwnagotchi
from pwnagotchi import utils
from pwnagotchi.plugins import cmd as plugins_cmd
from pwnagotchi import log
from pwnagotchi import restart
from pwnagotchi import fs
from pwnagotchi.utils import DottedTomlEncoder, parse_version as version_to_tuple


def do_clear(display):
    logging.info("clearing the display ...")
    display.clear()
    sys.exit(0)


def do_manual_mode(agent):
    logging.info("entering manual mode ...")

    agent.mode = 'manual'
    agent.last_session.parse(agent.view(), args.skip_session)
    if not args.skip_session:
        logging.info(
            "the last session lasted %s (%d completed epochs, trained for %d), average reward:%s (min:%s max:%s)" % (
                agent.last_session.duration_human,
                agent.last_session.epochs,
                agent.last_session.train_epochs,
                agent.last_session.avg_reward,
                agent.last_session.min_reward,
                agent.last_session.max_reward))

    while True:
        display.on_manual_mode(agent.last_session)
        time.sleep(5)
        if grid.is_connected():
            plugins.on('internet_available', agent)


def do_auto_mode(agent):
    logging.info("entering auto mode ...")

    agent.mode = 'auto'
    agent.start()

    while True:
        try:
            # recon on all channels
            agent.recon()
            # get nearby access points grouped by channel
            channels = agent.get_access_points_by_channel()
            # for each channel
            for ch, aps in channels:
                agent.set_channel(ch)

                if not agent.is_stale() and agent.any_activity():
                    logging.info("%d access points on channel %d" % (len(aps), ch))

                # for each ap on this channel
                for ap in aps:
                    # send an association frame in order to get for a PMKID
                    agent.associate(ap)
                    # deauth all client stations in order to get a full handshake
                    for sta in ap['clients']:
                        agent.deauth(ap, sta)
                        time.sleep(1)  # delay to not trigger nexmon firmware bugs

            # An interesting effect of this:
            #
            # From Pwnagotchi's perspective, the more new access points
            # and / or client stations nearby, the longer one epoch of
            # its relative time will take ... basically, in Pwnagotchi's universe,
            # WiFi electromagnetic fields affect time like gravitational fields
            # affect ours ... neat ^_^
            agent.next_epoch()

            if grid.is_connected():
                plugins.on('internet_available', agent)

        except Exception as e:
            if str(e).find("wifi.interface not set") > 0:
                logging.exception("main loop exception due to unavailable wifi device, likely programmatically disabled (%s)", e)
                logging.info("sleeping 60 seconds then advancing to next epoch to allow for cleanup code to trigger")
                time.sleep(60)
                agent.next_epoch()
            else:
                logging.exception("main loop exception (%s)", e)


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser = plugins_cmd.add_parsers(parser)

    parser.add_argument('-C', '--config', action='store', dest='config', default='/etc/pwnagotchi/default.toml',
                        help='Main configuration file.')
    parser.add_argument('-U', '--user-config', action='store', dest='user_config', default='/etc/pwnagotchi/config.toml',
                        help='If this file exists, configuration will be merged and this will override default values.')

    parser.add_argument('--manual', dest="do_manual", action="store_true", default=False, help="Manual mode.")
    parser.add_argument('--skip-session', dest="skip_session", action="store_true", default=False,
                        help="Skip last session parsing in manual mode.")

    parser.add_argument('--clear', dest="do_clear", action="store_true", default=False,
                        help="Clear the ePaper display and exit.")

    parser.add_argument('--debug', dest="debug", action="store_true", default=False,
                        help="Enable debug logs.")

    parser.add_argument('--version', dest="version", action="store_true", default=False,
                        help="Print the version.")

    parser.add_argument('--print-config', dest="print_config", action="store_true", default=False,
                        help="Print the configuration.")

    # Jayofelony added these
    parser.add_argument('--check-update', dest="check_update", action="store_true", default=False,
                        help="Check for updates on Pwnagotchi. And tells current version.")
    parser.add_argument('--donate', dest="donate", action="store_true", default=False,
                        help="How to donate to this project.")

    args = parser.parse_args()

    if plugins_cmd.used_plugin_cmd(args):
      config = utils.load_config(args)
      log.setup_logging(args, config)
      rc = plugins_cmd.handle_cmd(args, config)
      sys.exit(rc)

    if args.version:
        print(pwnagotchi.__version__)
        sys.exit(0)

    if args.donate:
        print("Donations can made @ https://www.patreon.com/pwnagotchi_torch \n\nBut only if you really want to!")
        sys.exit(0)

    if args.check_update:
        resp = requests.get("https://api.github.com/repos/jayofelony/pwnagotchi/releases/latest")
        latest = resp.json()
        latest_ver = latest['tag_name'].replace('v', '')

        local = version_to_tuple(pwnagotchi.__version__)
        remote = version_to_tuple(latest_ver)
        if remote > local:
            user_input = input("There is a new version available! Update from v%s to v%s?\n[y(es)/n(o)]" % (pwnagotchi.__version__, latest_ver))
            # input validation
            if user_input.lower() in ('y', 'yes'):
                os.system("rm /root/.auto-update && systemctl restart pwnagotchi")
                print("Okay, give me a couple minutes. Just watch pwnlog while you wait.")
            elif user_input.lower() in ('n', 'no'):  # using this elif for readability
                print("Okay, guess not!")
        else:
            print("You are currently on the latest release, v%s." % pwnagotchi.__version__)
        sys.exit(0)

    config = utils.load_config(args)

    if args.print_config:
        print(toml.dumps(config, encoder=DottedTomlEncoder()))
        sys.exit(0)

    from pwnagotchi.identity import KeyPair
    from pwnagotchi.agent import Agent
    from pwnagotchi.ui import fonts
    from pwnagotchi.ui.display import Display
    from pwnagotchi import grid
    from pwnagotchi import plugins

    pwnagotchi.config = config
    fs.setup_mounts(config)
    log.setup_logging(args, config)
    fonts.init(config)

    pwnagotchi.set_name(config['main']['name'])

    plugins.load(config)

    display = Display(config=config, state={'name': '%s>' % pwnagotchi.name()})

    if args.do_clear:
        do_clear(display)
        sys.exit(0)

    agent = Agent(view=display, config=config, keypair=KeyPair(view=display))

    def usr1_handler(*unused):
        logging.info('Received USR1 singal. Restart process ...')
        restart("MANU" if args.do_manual else "AUTO")

    signal.signal(signal.SIGUSR1, usr1_handler)

    if args.do_manual:
        do_manual_mode(agent)
    else:
        do_auto_mode(agent)
