#!/usr/bin/env python3

from subprocess import check_output, CalledProcessError
from re import findall
from signal import signal, SIGTERM
from sys import exit
from time import sleep


def handle_signal(_signo, _stack_frame):
    exit(0)

signal(SIGTERM, handle_signal)


try:
    print('Startup', flush=True)

    while True:
        try:
            for line in check_output(['pactl', 'list', 'sink-inputs']).decode().splitlines():
                line = line.strip().lower()

                if not line:
                    continue

                if line.startswith('sink input #'):
                    sink_id = line[len('sink input #'):]
                    needs_adjusting = False

                if line.startswith('volume:'):
                    for speaker, absolute, percent in findall('([a-z-]+):\W+([0-9]+)\W+\/\W+([0-9]+)%', line):
                        if int(percent) > 3 and int(percent) < 100:
                            print(f'  sink {sink_id} speaker {speaker} at {percent} % volume', flush=True)
                            needs_adjusting = True

                if needs_adjusting:
                    check_output(['pactl', 'set-sink-input-volume', sink_id, '100%'])
                    print(f'  adjusted sink {sink_id} to 100%', flush=True)

                    needs_adjusting = False

        except CalledProcessError as e:
            print(repr(e))

        sleep(0.5)
finally:
    print('Shutdown', flush=True)