/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdio.h>

#include <jawt.h>
#include <win32/jawt_md.h>
#include <windows.h>

#include <utils/unwindows.h>

#include "JAWTUtils.h"
#include <filament/Engine.h>

extern "C" {

void* getNativeWindow(JNIEnv* env, jclass, jobject surface) {
    JAWT_DrawingSurface* ds = nullptr;
    JAWT_DrawingSurfaceInfo* dsi = nullptr;

    if (!acquireDrawingSurface(env, surface, &ds, &dsi)) {
        return nullptr;
    }

    JAWT_Win32DrawingSurfaceInfo* dsi_win32 = (JAWT_Win32DrawingSurfaceInfo*) dsi->platformInfo;
    HWND hWnd = dsi_win32->hwnd;

    releaseDrawingSurface(ds, dsi);

    return (void*) hWnd;
}


jlong createNativeSurface(jint width, jint height) {
    // We need to adjust the window size so the "client area" matches width and height requested.
    // Otherwise, the window itself will be of dimension width-height but the "client area" and the
    // resulting surface will be smaller than requested.
    RECT dimension = {0, 0, width, height};
    AdjustWindowRect(&dimension, WS_OVERLAPPEDWINDOW, FALSE);
    width = dimension.right - dimension.left;
    height = dimension.bottom - dimension.top;

    HWND window = CreateWindowA("STATIC", "dummy", 0, 0, 0, width, height, NULL, NULL, NULL, NULL);
    SetWindowLong(window, GWL_STYLE, 0); //remove all window styles

    return (jlong) window;
}

void destroyNativeSurface(jlong surface) {
    HWND window = (HWND) surface;
    DestroyWindow(window);
}

}