#!/usr/bin/env bash
# fetch_fmod.sh - stage the official FMOD Android SDK (user-licensed) for arm64 replacement.
#
# FMOD is proprietary and REQUIRES a (free) fmod.com developer account; its download links are
# account-gated, so this script cannot silently pull it. Provide one of:
#   FMOD_ZIP=/path/to/fmodstudioapi<version>android.tar.gz   ./fetch_fmod.sh
# or drop the extracted 'api/core/lib/arm64-v8a/libfmod.so' into native/third_party/fmod/ yourself.
#
# We deliberately do NOT fetch FMOD from unofficial mirrors (license + integrity).
set -euo pipefail
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJ="$(cd "$HERE/../.." && pwd)"
DEST="$PROJ/native/third_party/fmod"
mkdir -p "$DEST"

if [ -z "${FMOD_ZIP:-}" ]; then
  cat <<EOF
[!] No FMOD_ZIP provided.
    1) Create a free account at https://www.fmod.com and download "FMOD Engine" for Android.
    2) Re-run:  FMOD_ZIP=/path/to/fmodstudioapiXXXandroid.tar.gz $0
    Fallback:   build native/compatibility/fmod_shim (open backend) - see SHARED_LIBRARY_PORTING_PLAN.md.
EOF
  exit 2
fi
tmp="$(mktemp -d)"; tar -xf "$FMOD_ZIP" -C "$tmp"
found="$(find "$tmp" -path '*arm64-v8a/libfmod.so' | head -1)"
[ -n "$found" ] || { echo "arm64 libfmod.so not found in archive"; exit 3; }
cp -f "$found" "$DEST/libfmod.so"
# also copy headers for building the libg glue
hdr="$(find "$tmp" -type d -name inc -o -type d -name include | head -1)"
[ -n "$hdr" ] && cp -rf "$hdr" "$DEST/include" || true
rm -rf "$tmp"
echo "[+] FMOD arm64 staged at $DEST/libfmod.so"