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

#if 1 // Simple JNI Implementation
JNIEXPORT
jstring
JNICALL
Java_tk_oxore_NativeArmv6_DummyAct_helloJni(JNIEnv* env, jobject thiz)
{
    
    __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "Debug Log");
    return (*env)->NewStringUTF(env, "Hello Form JNI");
}

#else // Alternative JNI imlementation
jstring
helloJni(JNIEnv* env, jobject thiz)
{
    __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "Debug Log");
    return (*env)->NewStringUTF(env, "Hello Form JNI");
}

jint
JNI_OnLoad(JavaVM* vm, void* reserved)
{
    __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "Running JNI_OnLoad");

    if (vm == NULL) {
        __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "vm == NULL");
        return JNI_ERR;
    }

    JavaVMAttachArgs args;
    args.version = JNI_VERSION_1_6; // choose your JNI version
    args.name = NULL; // you might want to give the java thread a name
    args.group = NULL; // you might want to assign the java thread to a ThreadGroup
    JNIEnv* env;
    if ((*vm)->AttachCurrentThread(vm, &env, &args) != JNI_OK) {
        __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "GetEnv != JNI_OK");
        return JNI_ERR;
    }

    if (env == NULL) {
        __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "env == NULL");
        return JNI_ERR;
    }

    if ((*env)->FindClass == NULL) {
        __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "No `FindClass` function provided");
        return JNI_ERR;
    }

    // Find your class. JNI_OnLoad is called from the correct class loader context for this to work.
    jclass c = (*env)->FindClass(env, "tk/oxore/NativeArmv6/DummyAct");
    if (c == NULL) {
        __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "c == NULL");
        return JNI_ERR;
    }

    // Register your class' native methods.
    static const JNINativeMethod methods[] = {
        {"helloJni", "()Ljava/lang/String;", (void*)&helloJni},
    };
    int rc = (*env)->RegisterNatives(env, c, methods, sizeof(methods)/sizeof(*methods));
    if (rc != JNI_OK) {
        __android_log_write(ANDROID_LOG_DEBUG, "HELLOJNI", "rc != JNI_OK");
        return rc;
    }

    return JNI_VERSION_1_6;
}
#endif