#!/usr/bin/env bash
# verify_native_host.sh - host-compile the reconstructed native skeleton WITHOUT the Android NDK.
# Compiles native/src/libg/** into a host shared object using the JDK's jni.h, purely to syntax/
# type-check the JNI boundary + engine interface in an environment where the NDK is unavailable.
# It does NOT produce an Android .so.
set -euo pipefail
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJ="$(cd "$HERE/../.." && pwd)"
JH="${JAVA_HOME:-$(dirname "$(dirname "$(readlink -f "$(command -v javac)")")")}"
[ -f "$JH/include/jni.h" ] || { echo "jni.h not found under JAVA_HOME=$JH"; exit 2; }

CXX="${CXX:-g++}"
OUT="$(mktemp -d)"; trap 'rm -rf "$OUT"' EXIT
mapfile -t SRCS < <(find "$PROJ/native/src/libg" -name '*.cpp')
echo "[*] Host-compiling ${#SRCS[@]} native source(s) with $CXX (jni.h from $JH)"
"$CXX" -std=c++17 -fPIC -shared -O0 -Wall -Wextra \
    -I"$PROJ/native/include" -I"$PROJ/native/third_party/fmod/include" -I"$JH/include" -I"$JH/include/linux" \
    "${SRCS[@]}" -o "$OUT/libg_host.so"
echo "[+] NATIVE HOST COMPILE OK -> libg_host.so"
echo "    JNI exports present:"
nm -D --defined-only "$OUT/libg_host.so" 2>/dev/null | grep -cE "Java_com_supercell_titan_|JNI_OnLoad" \
    | sed 's/^/      Java_com_supercell_titan_* + JNI_OnLoad = /'
echo "    (expected 61: 60 JNI methods + JNI_OnLoad)"