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#include <jni.h>
#include <string>
#include <android/log.h>

#define LOG_TAG "NativeSignatureCheck"
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)

extern "C" JNIEXPORT jstring JNICALL
Java_com_example_myapp_MainActivity_checkSignature(JNIEnv *env, jobject /* this */) {
    jclass signatureHelperClass = env->FindClass("com/example/myapp/SignatureHelper");
    jmethodID getAppSignatureMethod = env->GetStaticMethodID(signatureHelperClass, "getAppSignature", "()Ljava/lang/String;");
    
    // Gọi hàm Java từ mã native
    jstring signatureBase64 = (jstring) env->CallStaticObjectMethod(signatureHelperClass, getAppSignatureMethod);
    
    const char *signature = env->GetStringUTFChars(signatureBase64, NULL);
    
    // In chữ ký để kiểm tra
    LOGI("App signature: %s", signature);
    
    // Release memory
    env->ReleaseStringUTFChars(signatureBase64, signature);

    return signatureBase64;
}