#!/usr/bin/env bash
# Displays the default device, volume, and mute status for i3blocks


AUDIO_HIGH_SYMBOL=""
AUDIO_MED_SYMBOL=""
AUDIO_LOW_SYMBOL=""
AUDIO_MUTED_SYMBOL=""

AMIXER=$(amixer get Master | tail -n 1) # get last line of amixer output

# show either volume or mute
if [[ $AMIXER =~ "[on]" ]]; then # check if channel is muted by checking if line contains the word "on"
    IFS=' ' read -ra args <<< "$AMIXER" # split string

    VOL="${args[4]:1:-2}" # get 4th argument (the volume) from the string we just split and remove the first and last argument (square brackets) and the % at the end

    if [ "$VOL" -le "0" ]; then
        echo "$AUDIO_LOW_SYMBOL"
    elif [ "$VOL" -le "50" ]; then
        echo "$AUDIO_MED_SYMBOL $VOL%"
    else
        echo "$AUDIO_HIGH_SYMBOL $VOL%"
    fi
else
    echo "$AUDIO_MUTED_SYMBOL"
fi