#!/usr/bin/env bash

if [ -z "$1" ]; then
    image=$(zenity --file-selection --title="Open File" --file-filter="*.jpg *.jpeg *.png *.webp *.bmp *.jfif *.tiff *.avif *.heic *.heif")
else
    image="$1"
fi

[ -z "$image" ] && exit 1
[ ! -f "$image" ] && exit 1

ext=${image##*.}
current_dir="$HOME/.local/share/wallpaper/current"
image_copied="$current_dir/wallpaper.$ext"

mkdir -p "$current_dir" || (
    echo "Could not create directory $current_dir"
    exit 1
)

temp_img=$(mktemp --suffix=."$ext") || exit 1
trap 'rm -f "$temp_img"' EXIT
cp "$image" "$temp_img" || exit 1
rm -f "$current_dir"/wallpaper.*
cp -f "$temp_img" "$image_copied" || (
    echo "Could not copy image to $current_dir"
    exit 1
)

if [ "$XDG_CURRENT_DESKTOP" = "Hyprland" ]; then
    hyprctl hyprpaper reload ,"$image_copied" || exit 1
    echo "preload = $image_copied" >"$HOME/.config/hypr/hyprpaper.conf"
    echo "wallpaper = , $image_copied" >>"$HOME/.config/hypr/hyprpaper.conf"

    notify-send "Wallpaper Changed" "$image"
elif [ "$XDG_CURRENT_DESKTOP" = "niri" ]; then
    killall swaybg
    killall swww

    blur_dir="$HOME/.local/share/wallpaper/blurred"
    mkdir -p "$blur_dir" || (
        echo "Could not create cache directory"
        exit 1
    )
    rm -rf "${blur_dir:?}"/*
    blurred_image="$blur_dir/blurred.$ext"

    # blur
    (
        # notify-send "Generating Blurred Wallpaper" "This may take a few seconds..."

        sigma=$(magick identify -format "%w %h" "$image_copied" | awk -v f=0.01 '{
            m=($1>$2)?$1:$2;
            s=m*f;
            if(s<2) s=2;
            if(s>200) s=200;
            printf "%.2f", s
        }')

        magick "$image_copied" -blur 0x"$sigma" "$blurred_image" || (
            echo "Could not create blurred image"
            exit 1
        )

        # nohup swaybg -i "$blurred_image" -m fill > /dev/null 2> /dev/null &
        swww img -n backdrop "$blurred_image" --transition-type fade --transition-duration 2 > /dev/null 2> /dev/null

        notify-send "Blurred Wallpaper set" "Selected wallpaper has been successfully applied for overview"
    ) &

    swww img -n background "$image_copied" --transition-type fade --transition-duration 2 > /dev/null 2> /dev/null

    notify-send "Wallpaper Changed" "$image"
else
    echo "Unsupported desktop environment: $XDG_CURRENT_DESKTOP"
    exit 1
fi

# notify-send "Extracting Colors from Wallpaper" "This may take a few seconds..."
change-colortheme -i "$image_copied" || exit 1