#!/bin/bash
set -e

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SVG="$SCRIPT_DIR/au-o2-gui/assets/icon.svg"
ASSETS="$SCRIPT_DIR/au-o2-gui/assets"

if [ ! -f "$SVG" ]; then
    echo "No icon.svg found at $SVG — skipping icon generation."
    exit 0
fi

if ! command -v rsvg-convert &>/dev/null; then
    echo "rsvg-convert not found. Install with: brew install librsvg"
    exit 1
fi

case "$OSTYPE" in
    darwin*)
        ICONSET="$ASSETS/icon.iconset"
        rm -rf "$ICONSET"
        mkdir -p "$ICONSET"

        rsvg-convert -w 16   -h 16   "$SVG" -o "$ICONSET/icon_16x16.png"
        rsvg-convert -w 32   -h 32   "$SVG" -o "$ICONSET/icon_16x16@2x.png"
        cp "$ICONSET/icon_16x16@2x.png"       "$ICONSET/icon_32x32.png"
        rsvg-convert -w 64   -h 64   "$SVG" -o "$ICONSET/icon_32x32@2x.png"
        rsvg-convert -w 128  -h 128  "$SVG" -o "$ICONSET/icon_128x128.png"
        rsvg-convert -w 256  -h 256  "$SVG" -o "$ICONSET/icon_128x128@2x.png"
        cp "$ICONSET/icon_128x128@2x.png"     "$ICONSET/icon_256x256.png"
        rsvg-convert -w 512  -h 512  "$SVG" -o "$ICONSET/icon_256x256@2x.png"
        cp "$ICONSET/icon_256x256@2x.png"     "$ICONSET/icon_512x512.png"
        rsvg-convert -w 1024 -h 1024 "$SVG" -o "$ICONSET/icon_512x512@2x.png"

        iconutil -c icns "$ICONSET" -o "$ASSETS/icon.icns"
        rm -rf "$ICONSET"
        echo "Generated icon.icns"
        ;;
    msys*|cygwin*|win*)
        ICO_DIR="$ASSETS/icon.iconset"
        rm -rf "$ICO_DIR"
        mkdir -p "$ICO_DIR"
        for size in 16 32 48 64 128 256; do
            rsvg-convert -w "$size" -h "$size" "$SVG" -o "$ICO_DIR/${size}.png"
        done
        if command -v magick &>/dev/null; then
            magick "$ICO_DIR/16.png" "$ICO_DIR/32.png" "$ICO_DIR/48.png" \
                   "$ICO_DIR/64.png" "$ICO_DIR/128.png" "$ICO_DIR/256.png" \
                   "$ASSETS/icon.ico"
            rm -rf "$ICO_DIR"
            echo "Generated icon.ico"
        else
            echo "PNGs rendered to $ICO_DIR — install ImageMagick to assemble .ico"
        fi
        ;;
    *)
        echo "No icon conversion needed for $OSTYPE"
        ;;
esac