#!/bin/bash
until pactl info &>/dev/null; do
    sleep 0.5
done

sleep 3

WOB_SOCK="${XDG_RUNTIME_DIR}/wob.sock"
prev_vol=""
prev_muted=""

get_vol() {
    pactl get-sink-volume @DEFAULT_SINK@ 2>/dev/null | grep -oP '\d+(?=%)' | head -1
}

get_muted() {
    pactl get-sink-mute @DEFAULT_SINK@ 2>/dev/null | grep -q yes && echo 1 || echo 0
}

pactl subscribe 2>/dev/null | grep --line-buffered "^Event 'change' on sink #" | while read -r _; do
    # First read
    vol1=$(get_vol)
    muted1=$(get_muted)

    # Wait and read again — if still changing (app connecting) the values won't match
    sleep 0.25
    vol2=$(get_vol)
    muted2=$(get_muted)

    # Skip if unstable
    [ "$vol1" != "$vol2" ] || [ "$muted1" != "$muted2" ] && continue

    # Skip if nothing changed from last shown value
    [ "$vol2" = "$prev_vol" ] && [ "$muted2" = "$prev_muted" ] && continue

    prev_vol="$vol2"
    prev_muted="$muted2"

    if [ "$muted2" = "1" ]; then
        echo 0 > "$WOB_SOCK"
    else
        echo "$vol2" > "$WOB_SOCK"
    fi
done