#!/bin/bash

PIDFILE="/var/run/user/$UID/bg.pid"

# Declare PIDs array
declare -a PIDs

_screen() {
    # g specify geometry heightxwidth+xcoord+ycoord
    # ni Ignore Input
    # ov For Desktop background 
    # fs fullscreen
    # vo=gpu gpu accelerated video output
    # hwdec=vdpau use vdpau for gpu acceleration
    xwinwrap -ov -ni -g "$1" -- mpv -fs\
        --no-stop-screensaver\
        --vo=gpu --hwdec=vaapi\
        --loop-file --no-audio --no-osc --no-osd-bar\
        -wid WID --no-input-default-bindings\
        "$2" &
    # Needs more testing not in fullscreen mode
    #xwinwrap -ov -ni -g "$1" -- sxiv "$2" -f -b -a -e WID &
    PIDs+=($!)
}

while read p; do
    [[ $(ps -p "$p" -o comm=) == "xwinwrap" ]] && kill -9 "$p";
done < $PIDFILE

sleep 0.5

for i in $(xrandr -q | grep ' connected' | grep -oP '\d+x\d+\+\d+\+\d+')
do
    _screen "$i" "$1"
done

printf "%s\n" "${PIDs[@]}" > $PIDFILE