#!/bin/sh

print_help() {
    echo "Usage: $0 [input-file]"
    echo
    echo "Changes your current wallpaper"
    echo "Please note that this script is made to be used with the Atlas Desktop and will probably not work on most other desktops."
}

if [ $# -ne 1 ]; then
    print_help
    exit 1
fi

# Check if file exists
if [ -e "$1" ]; then

    # Variables declaration
    wallpaper_config=~/.config/hypr/hyprpaper.conf
    wallpaper_path=~/.config/hypr/images/wallpaper # Doesn't contain file extension
    file_extension="${1##*.}"

    # In case file has no extension
    if [ "${file_extension}" == "$1" ]; then
        echo "Error: please provide a file extension (ex: .jpg, .png...)"
        exit 1
    fi

    # Remove old wallpaper
    rm $wallpaper_path*

    # Copy file
    cp "$1" "${wallpaper_path}.${file_extension}"
    if [ $? != 0 ]; then
        echo "Aborted."
        exit 1
    fi
    
    # Update config
    sed -i "s/wallpaper\.[^[:space:]]*/wallpaper.$file_extension/g" $wallpaper_config # Replace current extension by new extension
    if [ $? != 0 ]; then
        echo "Aborted."
        exit 1
    fi

    # Reload Hyprpaper
    pkill hyprpaper
    hyprctl dispatch exec hyprpaper > /dev/null # Start hyprpaper and hide stdout output
    # Or you can do the old fashioned way :
    # nohup hyprpaper </dev/null >/dev/null 2>&1 &

    echo "Done"
    exit 0
else
    echo "Couldn't find '${1}': No such file or directory"
    exit 1
fi