#!/usr/bin/env bash
# Build a self-contained Step Line AppImage (all game data included).
#
# Prereqs: exported Linux binary in build/ (embed_pck=true), curl.
# Usage:   bash packaging/linux/build_appimage.sh [version]
# Output:  build/step-line-<version>-x86_64.AppImage
set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT="$(cd "$HERE/../.." && pwd)"
VERSION="${1:-$(sed -n 's/.*config\/version="\([^"]*\)".*/\1/p' "$ROOT/project.godot")}"
SRC_BIN="$ROOT/build/step-line-linux-${VERSION}.x86_64"

if [[ ! -f "$SRC_BIN" ]]; then
  echo "error: missing $SRC_BIN — run ./tools/build_releases.sh first" >&2
  exit 1
fi

WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT
APPDIR="$WORK/StepLine.AppDir"
mkdir -p "$APPDIR/usr/bin"
cp "$SRC_BIN" "$APPDIR/usr/bin/step-line"
# The export embeds the PCK (embed_pck=true), so no extra data files are needed.

cp "$HERE/step-line.desktop" "$APPDIR/step-line.desktop"
cp "$HERE/AppRun" "$APPDIR/AppRun"
chmod +x "$APPDIR/AppRun"
cp "$HERE/step-line.png" "$APPDIR/step-line.png"
mkdir -p "$APPDIR/usr/share/metainfo"
cp "$HERE/step-line.appdata.xml" "$APPDIR/usr/share/metainfo/step-line.appdata.xml"

TOOL="${APPIMAGE_TOOL:-/tmp/appimagetool-x86_64.AppImage}"
if [[ ! -f "$TOOL" ]]; then
  echo "==> Downloading appimagetool"
  curl -sL -o "$TOOL" \
    https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-x86_64.AppImage
  chmod +x "$TOOL"
fi

OUT="$ROOT/build/step-line-${VERSION}-x86_64.AppImage"
echo "==> Building AppImage -> $OUT"
# Extract-and-run avoids a FUSE dependency on the build host.
APPIMAGE_EXTRACT_AND_RUN=1 "$TOOL" "$APPDIR" "$OUT"
echo "AppImage ready: $(ls -la "$OUT" | awk '{print $5}') bytes"