# Copyright 2021 Oliver Smith
# SPDX-License-Identifier: GPL-3.0-or-later
# PYTHON_ARGCOMPLETE_OK
import sys
import logging
import os
import traceback
import dbus.mainloop.glib
import dbus
import dbus.exceptions

from . import actions
from . import config
from . import helpers
from .helpers import logging as tools_logging


def main():
    def actionNeedRoot(action):
        if os.geteuid() != 0:
            raise RuntimeError(
                "Action \"{}\" needs root access".format(action))

    # Wrap everything to display nice error messages
    args = None
    try:
        # Parse arguments, set up logging
        args = helpers.arguments()
        args.cache = {}
        args.work = config.defaults["work"]
        args.config = args.work + "/waydroid.cfg"
        args.log = args.work + "/waydroid.log"
        args.sudo_timer = True
        args.timeout = 1800

        if os.geteuid() == 0:
            if not os.path.exists(args.work):
                os.mkdir(args.work)
        elif not os.path.exists(args.log):
            args.log = "/tmp/tools.log"

        tools_logging.init(args)

        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
        dbus.mainloop.glib.threads_init()
        dbus_name_scope = None

        if not actions.initializer.is_initialized(args) and \
                args.action and args.action not in ("init", "first-launch", "log"):
            if args.wait_for_init:
                try:
                    dbus_name_scope = dbus.service.BusName("id.waydro.Container", dbus.SystemBus(), do_not_queue=True)
                    actions.wait_for_init(args)
                except dbus.exceptions.NameExistsException:
                    print('ERROR: WayDroid service is already awaiting initialization')
                    return 1
            else:
                print('ERROR: WayDroid is not initialized, run "waydroid init"')
                return 0

        # Initialize or require config
        if args.action == "init":
            actionNeedRoot(args.action)
            actions.init(args)
        elif args.action == "upgrade":
            actionNeedRoot(args.action)
            actions.upgrade(args)
        elif args.action == "session":
            if args.subaction == "start":
                actions.session_manager.start(args)
            elif args.subaction == "stop":
                actions.session_manager.stop(args)
            else:
                logging.info(
                    "Run waydroid {} -h for usage information.".format(args.action))
        elif args.action == "container":
            actionNeedRoot(args.action)
            if args.subaction == "start":
                if dbus_name_scope is None:
                    try:
                        dbus_name_scope = dbus.service.BusName("id.waydro.Container", dbus.SystemBus(), do_not_queue=True)
                    except dbus.exceptions.NameExistsException:
                        print('ERROR: WayDroid container service is already running')
                        return 1
                actions.container_manager.start(args)
            elif args.subaction == "stop":
                actions.container_manager.stop(args)
            elif args.subaction == "restart":
                actions.container_manager.restart(args)
            elif args.subaction == "freeze":
                actions.container_manager.freeze(args)
            elif args.subaction == "unfreeze":
                actions.container_manager.unfreeze(args)
            else:
                logging.info(
                    "Run waydroid {} -h for usage information.".format(args.action))
        elif args.action == "app":
            if args.subaction == "install":
                actions.app_manager.install(args)
            elif args.subaction == "remove":
                actions.app_manager.remove(args)
            elif args.subaction == "launch":
                actions.app_manager.launch(args)
            elif args.subaction == "intent":
                actions.app_manager.intent(args)
            elif args.subaction == "list":
                actions.app_manager.list(args)
            else:
                logging.info(
                    "Run waydroid {} -h for usage information.".format(args.action))
        elif args.action == "prop":
            if args.subaction == "get":
                actions.prop.get(args)
            elif args.subaction == "set":
                actions.prop.set(args)
            else:
                logging.info(
                    "Run waydroid {} -h for usage information.".format(args.action))
        elif args.action == "shell":
            actionNeedRoot(args.action)
            helpers.lxc.shell(args)
        elif args.action == "logcat":
            actionNeedRoot(args.action)
            helpers.lxc.logcat(args)
        elif args.action == "show-full-ui":
            actions.app_manager.showFullUI(args)
        elif args.action == "first-launch":
            actions.remote_init_client(args)
            if actions.initializer.is_initialized(args):
                actions.app_manager.showFullUI(args)
        elif args.action == "status":
            actions.status.print_status(args)
        elif args.action == "log":
            if args.clear_log:
                helpers.run.user(args, ["truncate", "-s", "0", args.log])
            try:
                helpers.run.user(
                    args, ["tail", "-n", args.lines, "-F", args.log], output="tui")
            except KeyboardInterrupt:
                pass
        else:
            logging.info("Run waydroid -h for usage information.")

        #logging.info("Done")

    except Exception as e:
        # Dump log to stdout when args (and therefore logging) init failed
        if not args:
            logging.getLogger().setLevel(logging.DEBUG)

        logging.info("ERROR: " + str(e))
        logging.info("See also: <https://github.com/waydroid>")
        logging.debug(traceback.format_exc())

        # Hints about the log file (print to stdout only)
        log_hint = "Run 'waydroid log' for details."
        if not args or not os.path.exists(args.log):
            log_hint += (" Alternatively you can use '--details-to-stdout' to"
                         " get more output, e.g. 'waydroid"
                         " --details-to-stdout init'.")
        print(log_hint)
        return 1


if __name__ == "__main__":
    sys.exit(main())