mpwi

#!/bin/bash

INFO_LINES=4

dir=.

while getopts "d:" opt; do
    case "$opt" in
    d)
        dir=$OPTARG
    ;;
    esac
done

cd "$dir" 2>/dev/null || {
    >&2 echo "Provided dir option '$dir' is not a valid directory."
    exit 1
}

HOME=$(tput home; tput rmso)
SC=$(tput sc)
RC=$(tput rc)
CLEARTOP=$(
    tput rmso
    for i in 0..$INFO_LINES; do
        tput cup $i 0
        tput el
    done
)
CLEARREST=$(tput ed)
CLEARLINE=$(tput el)

tput smcup
tput clear
cleanup() {
    pkill -P $$
    tput rmcup
    exit 0
}
trap cleanup SIGINT EXIT

while true; do
    output=$(termux-media-player info)
    echo -n "$SC$CLEARTOP$HOME$output$RC"
done &

INPUT=$(tput cup $INFO_LINES 0; tput smso)
OUTPUT=$(tput cup $((INFO_LINES+1)) 0; tput rmso)

echo -n "$INPUT$CLEARLINE"

while true; do
    read -a cmd
    case "${cmd[0]}" in
    vol) output=$(termux-volume music "${cmd[1]}") ;;
    q|quit) exit 0 ;;
    *) output=$(termux-media-player ${cmd[@]}) ;;
    esac
    echo -n "$OUTPUT$CLEARREST$output$INPUT$CLEARLINE"
done