# -*- coding: utf-8 -*-
# input-remapper - GUI for device specific keyboard mappings
# Copyright (C) 2025 sezanzeb <b8x45ygc9@mozmail.com>
#
# This file is part of input-remapper.
#
# input-remapper is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# input-remapper is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with input-remapper.  If not, see <https://www.gnu.org/licenses/>.

"""Starts the user-level focus-service for focus-driven preset binding."""

import os
import sys
import time
from argparse import ArgumentParser
from typing import Optional

from inputremapper.configs.global_config import GlobalConfig
from inputremapper.daemon import Daemon, DaemonProxy
from inputremapper.logging.logger import logger


class InputRemapperFocusServiceBin:
    @staticmethod
    def _connect_daemon(retries: int = 10, delay: float = 1.0) -> Optional[DaemonProxy]:
        """Connect to the root daemon over the system bus, without pkexec.

        The focus-service runs as a background user service and must never
        trigger a polkit prompt, so it connects with fallback=False and simply
        retries until the daemon (started separately, e.g. via its systemd
        unit) becomes available.
        """
        for attempt in range(retries):
            daemon = Daemon.connect(fallback=False)
            if daemon is not None:
                return daemon
            logger.info(
                "Daemon not available yet (attempt %d/%d), retrying in %.1fs",
                attempt + 1,
                retries,
                delay,
            )
            time.sleep(delay)
        return None

    @staticmethod
    def main() -> None:
        parser = ArgumentParser()
        parser.add_argument(
            "-d",
            "--debug",
            action="store_true",
            dest="debug",
            help="Displays additional debug information",
            default=False,
        )
        parser.add_argument(
            "--hide-info",
            action="store_true",
            dest="hide_info",
            help="Don't display version information",
            default=False,
        )

        options = parser.parse_args(sys.argv[1:])

        logger.update_verbosity(options.debug)

        if not options.hide_info:
            logger.log_info("input-remapper-focus-service")

        if os.getuid() == 0:
            logger.warning(
                "The focus-service is meant to run as the logged-in user, not root"
            )

        # Imported here so log verbosity is configured first.
        from inputremapper.focus.focus_service import FocusService
        from inputremapper.focus.focus_watcher import select_backend

        global_config = GlobalConfig()
        backend = select_backend()

        daemon = InputRemapperFocusServiceBin._connect_daemon()
        if daemon is None:
            logger.error("Could not connect to the input-remapper daemon, exiting")
            sys.exit(1)

        focus_service = FocusService(global_config, backend, daemon)
        focus_service.run()