#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# reads and writes RGB and brightness data for led background color of Clevo NL51 Laptops
# ensure to compile drivers before ! read: https://wiki.siningsoft.de/doku.php?id=terra:1500p
# Kernelmodul: tuxedo_keyboard

# ToDo: add argument and function for switching color on commandline
# ToDo: add argument and functions for switching brightness on commandline

# 2026-02-02 - devnull - initial
# 2026-02-03 - devnull - added Brightness restore
# 2026-02-04 - devnull - JSON statefile
# 2026-02-11 - devnull - created class
# 2026-02-18 - devnull - added logging

ver="1.1"

import sys
import argparse
import json
import logging

log = logging.getLogger("kbdLED")



class kbdLED_class:

    # 2026-02-11 - devnull - Einführung einer Klassendefinition

    # diese Versionsnummer wird getrennt vom Programmcode geführt, da es sich getrennt entwickeln wird
    __version__ = 1.1
    config = dict()

    # Objekt erzeugen
    def __init__(self, cmd, log, kbd_state_fp='/var/lib/kbdLED.state.json',
                            sysfs_color_fp='/sys/devices/platform/tuxedo_keyboard/leds/rgb:kbd_backlight/multi_intensity',
                            sysfs_bri_fp='/sys/devices/platform/tuxedo_keyboard/leds/rgb:kbd_backlight/brightness'):


        self.config = {"sysfs" :
                           {
                                "color" : sysfs_color_fp ,
                                "bri" : sysfs_bri_fp
                           },
                       "state" : kbd_state_fp}

        #DEBUGprint("debug: " + str(self.config))

        if cmd=="start":
            self.readStateFile(self.config['state'])
            #print("debug: " + str(self.config))
            self.writeColor()
            self.writeBrightness()

        elif cmd=="stop":
            self.readColor()
            self.readBrightness()
            self.writeStateFile(self.config['state'])



    def readStateFile(self,kbd_state_fp):

        config = {"color":
                      {"R": 255,
                       "G": 255,
                       "B": 255},
                  "Brightness": 255
                  }

        try:
            with open(kbd_state_fp, 'r') as kbd_state_fh:
                self.config = json.load(kbd_state_fh)

        except FileNotFoundError:
            print("keine Statusdatei gefunden, nutze Standardwerte")
        except PermissionError:
            print("Fehler beim lesen")

    def writeStateFile(self,kbd_state_fp):
        try:
            with open(kbd_state_fp, 'w') as kbd_state_fh:
                json.dump(self.config,kbd_state_fh)

        except FileNotFoundError:
            print("Verzeichnis nicht gefunden")

    # color String nach Config Dict
    def color2dict(self,color_string):
        ca=color_string.split(" ")
        self.config['color'] = {"R": int(ca[0]),
                       "G": int(ca[1]),
                       "B": int(ca[2])}

    # color Confi Dict nach String
    def dict2color(self):
        return str(self.config['color']['R']) + " " + str(self.config['color']['G']) + " " + str(self.config['color']['B'])

    # reads the color Values from sysfs
    def readColor(self):
        try:
            with open(self.config['sysfs']['color']) as fh:
                self.color2dict(fh.read())

        except FileNotFoundError:
            print("- fehler beim Öffnen der Sysfs Datei " + self.config['sysfs']['color'])
            sys.exit(1)
        except PermissionError:
            print("- keine Rechte die Datei zu lesen " + self.config['sysfs']['color'])
            sys.exit(1)


    # writes the color values to sysfs
    def writeColor(self):
        try:
            #with open(self.config['sysfs']['color']) as fh:
            #    fh.write(self.dict2color())
            fh = open(self.config['sysfs']['color'], 'w')
            fh.write(self.dict2color())
            fh.close()

        except FileNotFoundError:
            print("- fehler beim Schreiben der Sysfs Datei " + self.config['sysfs']['color'])
            sys.exit(1)

        except PermissionError:
            print("- keine Rechte die Datei zu schreiben " + self.config['sysfs']['color'])
            sys.exit(1)

    # reads Brightness from sysfs
    def readBrightness(self):
        try:
            with open(self.config['sysfs']['bri']) as fh:
                self.config['Brightness'] = int(fh.read())

        except FileNotFoundError:
            print("- fehler beim Öffnen der Sysfs Datei " + self.config['sysfs']['bri'])
            sys.exit(1)
        except PermissionError:
            print("- keine Rechte die Datei zu lesen " + self.config['sysfs']['bri'])
            sys.exit(1)

    # writes Brightness to sysfs
    def writeBrightness(self):
        try:
            #with open(self.config['sysfs']['bri']) as fh:
            #    fh.write(self.config['Brightness'])
            fh = open(self.config['sysfs']['bri'], 'w')
            fh.write(str(self.config['Brightness']))
            fh.close()

        except FileNotFoundError:
            print("- fehler beim Schreiben der Sysfs Datei " + self.config['sysfs']['bri'])
            sys.exit(1)
        except PermissionError:
            print("- keine Rechte die Datei zu schreiben " + self.config['sysfs']['bri'])
            sys.exit(1)


# Press the green button in the gutter to run the script.
if __name__ == '__main__':

    parser = argparse.ArgumentParser(
                    prog='T1500_KeyboardLED',
                    description='saves and restore LED Colors',
                    epilog='GPL')
    startstop = parser.add_mutually_exclusive_group()
    startstop.add_argument('--start', action='store_true', help='will be used for system starts')
    startstop.add_argument('--stop', action='store_true', help='will be used for system shutdowns')
    startstop.add_argument('--verbose', action='store_true', help='extended Logging')
    startstop.add_argument('--debug', action='store_true', help='debugging information')
    startstop.add_argument('--version', action='version', version='%(prog)s ' + ver, default='d')

    args = parser.parse_args()

    if args.verbose:
        log.setLevel(logging.INFO)
    if args.debug:
        log.setLevel(logging.DEBUG)

    if args.start:
        print("Keyboard: read and set Color and Brightness")
        log.debug("System start")
        kL = kbdLED_class("start", log)

    elif args.stop:
        print("Keyboard: read and save Color and Brightness")
        log.debug("System stop")
        kL = kbdLED_class("stop", log)

    else:
        parser.print_help()
        sys.exit((10))

sys.exit(0)