#!/bin/bash
# to change wallpapers both niri workspace and niri tab view
[ -z "$1" ] && {
    echo "Usage: ${0##*/} <image-file>"
    exit 1
}
fsize=$(magick identify -format "%w %h" -- "$1" 2>/dev/null) || {
    echo "ERROR: unable to identify. is it an EXISTING ACCESSIBLE IMAGE file?"
    exit 1
}

WP_DIR="${XDG_DATA_HOME:-$HOME/.local/share}"
finput=$1

read -r fw fh <<< "$fsize"
(( fw > 3840 && fh > 2160 )) && {
    finput=$(mktemp "${TMPDIR:-/tmp}/chbg.XXXXXXXX.webp")
    trap 'rm -f "$finput"' EXIT
    echo "WARNING: image too large, resizing ..."
    # echo "DEBUG: resized image at $finput"
    magick "$1" -resize "3840x2160^" \
        -quality 90 \
        -define webp:method=6 \
        -define webp:alpha-quality=100 "$finput"
}

echo -n "making blurred version of ${1##*/} ... "
mkdir -p $WP_DIR
cp $finput $WP_DIR/.wallpaper
magick $WP_DIR/.wallpaper -filter Gaussian -blur 0x30 $WP_DIR/.wallpaper_blur
echo "Done."

swww img $WP_DIR/.wallpaper
swww img $WP_DIR/.wallpaper_blur --namespace blur