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#
# Copyright (C) 2021 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 os
import ctypes
import psutil
import subprocess
from subprocess import CalledProcessError
import multiprocessing as mp
from multiprocessing import Process, freeze_support
from src.log import OgError

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

from src.ogRest import ThreadState


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


def create_systray():
    menu = Menu(MenuItem('Powered by Soleta Networks!',
                         lambda icon, item: 1))
    icon = Icon('ogClient', create_image(), menu=menu)
    assert icon.icon
    icon.run()


class OgWindowsOperations:

    def __init__(self):
        self.session = False
        freeze_support()
        mp.set_start_method('spawn')
        self.systray_p = Process(target=create_systray, daemon=True)
        self.systray_p.start()

    def _restartBrowser(self, url):
        raise OgError('Function not implemented')

    def poweroff(self):
        self.systray_p.terminate()
        os.system('shutdown -s -t 0')

    def reboot(self):
        self.systray_p.terminate()
        os.system('shutdown -r -t 0')

    def shellrun(self, request, ogRest):
        raise OgError('Function not implemented')

    def cmdrun(self, request, ogRest):
        cmd = request.getrun()
        try:
            result = subprocess.run(cmd,
                                    shell=True,
                                    stdin=subprocess.DEVNULL,
                                    capture_output=True,
                                    text=True,
                                    check=True)
        except CalledProcessError as error:
            if error.stderr:
                return error.stderr
            if error.stdout:
                return error.stdout
            return "{Non zero exit code and empty output}"
        return (result.returncode, cmd, result.stdout)

    def session(self, request, ogRest):
        raise OgError('Function not implemented')

    def software(self, request, ogRest):
        raise OgError('Function not implemented')

    def hardware(self, ogRest):
        raise OgError('Function not implemented')

    def setup(self, request, ogRest):
        raise OgError('Function not implemented')

    def image_restore(self, request, ogRest):
        raise OgError('Function not implemented')

    def image_create(self, request, ogRest):
        raise OgError('Function not implemented')

    def cache_delete(self, request, ogRest):
        raise OgError('Function not implemented')

    def cache_fetch(self, request, ogRest):
        raise OgError('Function not implemented')

    def refresh(self, ogRest):
        if self.session:
            session_value = 'WINS'
        else:
            session_value = 'WIN'
        return {"status": session_value}

    def check_interactive_session_change(self):
        old_status = self.session
        has_logged_user = False
        for user in psutil.users():
            has_logged_user = True
            break
        self.session = has_logged_user

        if self.session != old_status:
            return self.session
        return None