#include <map>
#include <jni.h>
#include <string>
#include <android/asset_manager.h>
#include <android/asset_manager_jni.h>
#define NANOVG_GLES2_IMPLEMENTATION
#include "context.hpp"
#include "engine.hpp"
#include "utils.hpp"

std::unique_ptr<Engine> engine;
std::map<int, Context*> contexts;
AAssetManager *assetManager = nullptr;

JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved) {
    engine = std::unique_ptr<Engine>(new Engine);
    return  JNI_VERSION_1_6;
}

extern "C" JNIEXPORT void JNICALL Java_com_engune_livewall_common_Engine_nativeOnCreateEngine(JNIEnv* env, jclass obj, jobject context, jobject assetMgr)
{
    if (assetManager == nullptr) {
        assetManager = AAssetManager_fromJava(env, assetMgr);
    }
}

....

bool LoadFile(const char *filePath, char **buffer, int &size) {
    size = 0;
    *buffer = nullptr;

    AAsset *asset = AAssetManager_open(assetManager, filePath, AASSET_MODE_UNKNOWN);

    if (asset == nullptr)
        return false;

    size = (int) AAsset_getLength(asset);
    *buffer = (char *) malloc (size);
    AAsset_read (asset, buffer, (size_t) size);
    AAsset_close(asset);

    return true;
}