#!/bin/bash

WALL_DIR="/home/jamesw/Pictures/wallpapers"
CACHE_DIR="$HOME/.cache/wallpaper-thumbs"
mkdir -p "$CACHE_DIR"

find "$WALL_DIR" -type f \( -iname "*.jpg" -o -iname "*.png" -o -iname "*.jpeg" \) | while read -r img; do
    img_name=$(basename "$img")
    if [ ! -f "$CACHE_DIR/$img_name" ]; then
        magick "$img" -thumbnail 320x180^ -gravity center -extent 320x180 "$CACHE_DIR/$img_name" &
    fi
done

SELECTED_WALLPAPER=$(
    find "$WALL_DIR" -type f \( -iname "*.jpg" -o -iname "*.png" -o -iname "*.jpeg" \) -exec basename {} \; | sort | while read -r name; do
        echo -en "$name\0icon\x1f$CACHE_DIR/$name\n"
    done | rofi -dmenu -i -p "Select Wallpaper" \
        -theme-str '
        configuration { show-icons: true; }
        window { width: 1000px; }
        listview { columns: 5; lines: 1; dynamic:true;}
        element { orientation: vertical; children: [ "element-icon", "element-text" ]; width:320px; padding: 0px;}
        element-icon { size:180px; horizontal-align: 0.5; }
        element-text { font-size:8px; horizontal-align: 0.5; }'
)

if [ -n "$SELECTED_WALLPAPER" ]; then

    FULL_PATH="$WALL_DIR/$SELECTED_WALLPAPER"

    dbus-send --session --dest=org.kde.plasmashell --type=method_call /PlasmaShell org.kde.PlasmaShell.evaluateScript "string:
    var Desktops = desktops();
    for (i=0;i<Desktops.length;i++) {
        var d = Desktops[i];
        d.wallpaperPlugin = 'org.kde.image';
        d.currentConfigGroup = ['Wallpaper', 'org.kde.image', 'General'];
        d.writeConfig('Image', 'file://${FULL_PATH}');
    }"
fi