#!/bin/bash
set -euo pipefail
# Pinned Universal binary: native Intel and Apple Silicon, no Rosetta required.
engine_install() {
  local root="$1" archive stage actual
  local expected="59d195d1876210fa0f8c36bc10b147339fc8e076c684b74111533992f1a1dcdc0f760461f4cadad627e5b11e74468b54b9355fc6ea0c507c52533dfa7aa0c617"
  if [[ -x "$root/tools/godot/Godot.app/Contents/MacOS/Godot" ]]; then return; fi
  mkdir -p "$root/tools/godot"
  stage=$(mktemp -d "$root/tools/godot/.download.XXXXXX")
  archive="$stage/godot.zip"
  echo "02 / Godot 4.5 herunterladen und prüfen …"
  if [[ -f "${BLOCKLINE_ENGINE_ARCHIVE:-$root/Godot_v4.5-stable_macos.universal.zip}" ]]; then
    /bin/cp "${BLOCKLINE_ENGINE_ARCHIVE:-$root/Godot_v4.5-stable_macos.universal.zip}" "$archive"
  elif ! /usr/bin/curl --fail --location --retry 3 --connect-timeout 20 --max-time 600 --proto '=https' --tlsv1.2 \
    'https://github.com/godotengine/godot-builds/releases/download/4.5-stable/Godot_v4.5-stable_macos.universal.zip' -o "$archive"; then
    echo "Download fehlgeschlagen. Erneuter Start versucht die Installation erneut." >&2; return 1
  fi
  actual=$(/usr/bin/shasum -a 512 "$archive" | /usr/bin/awk '{print $1}')
  [[ "$actual" == "$expected" ]] || { echo "Godot-Prüfsumme ungültig." >&2; return 1; }
  /usr/bin/ditto -x -k "$archive" "$stage"
  [[ -f "$stage/Godot.app/Contents/MacOS/Godot" ]] || return 1
  /bin/chmod +x "$stage/Godot.app/Contents/MacOS/Godot"
  # Never alter Gatekeeper or remove quarantine attributes.
  if [[ -e "$root/tools/godot/Godot.app" ]]; then
    echo "Unvollständige Engine vorhanden. Bitte tools/godot/Godot.app prüfen." >&2; return 1
  fi
  /bin/mv "$stage/Godot.app" "$root/tools/godot/Godot.app"
  /bin/rm -f "$archive"
  /bin/rmdir "$stage"
}