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#!/usr/bin/python3

#
# Copyright (C) 2020-2024 Soleta Networks <info@soleta.eu>
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the
# Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.

import time
import multiprocessing as mp
import psutil

from PIL import Image, ImageDraw
from pystray import Icon, Menu, MenuItem

SERVICE_POLL_INTERVAL = 5


def _create_default_image():
    """
    Creates a default image for the tray icon. Use in case
    no favicon.ico is found. The image will be a blue circle.
    """
    width = height = 250
    circle_color = (45, 158, 251)

    # Create a new image with a transparent background
    image = Image.new('RGBA', (width, height), (0, 0, 0, 0))
    dc = ImageDraw.Draw(image)

    # Draw circle
    circle_radius = min(width, height) // 2 - 10
    circle_center = (width // 2, height // 2)
    dc.ellipse(
        (circle_center[0] - circle_radius, circle_center[1] - circle_radius,
         circle_center[0] + circle_radius, circle_center[1] + circle_radius),
        fill=circle_color
    )
    return image


def create_icon_image():
    try:
        image = Image.open(r'./favicon.ico')
        image = Image.composite(image, Image.new('RGB', image.size, 'white'), image)
    except FileNotFoundError:
        image = _create_default_image()
    return image


def create_systray():
    menu = Menu(MenuItem('ogclient service running',
                         lambda icon, item: None))
    icon = Icon('ogClient', create_icon_image(), menu=menu)
    icon.run()


def is_ogclient_service_active():
    service_name = 'ogclient'
    try:
        service = psutil.win_service_get(service_name)
        service = service.as_dict()
        return service.get('status') == 'running'
    except Exception:
        return False


def _session_check_loop():
    systray_process = None
    try:
        while True:
            session_status = is_ogclient_service_active()
            is_systray_active = systray_process and systray_process.is_alive()

            if session_status and not is_systray_active:
                systray_process = mp.Process(target=create_systray, daemon=True)
                systray_process.start()
            elif not session_status and is_systray_active:
                systray_process.terminate()
                systray_process.join()
                systray_process = None

            time.sleep(SERVICE_POLL_INTERVAL)
    except KeyboardInterrupt:
        if systray_process and systray_process.is_alive():
            systray_process.terminate()
            systray_process.join()


def main():
    mp.freeze_support()
    mp.set_start_method('spawn')
    _session_check_loop()


if __name__ == "__main__":
    main()