/*
 * All or portions of this file Copyright(c) Amazon.com, Inc.or its affiliates or
 * its licensors.
 *
 * For complete copyright and license terms please see the LICENSE at the root of this
 * distribution (the "License"). All use of this software is governed by the License,
 *or, if provided, by the license below or the license accompanying this file. Do not
 * remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
 *WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 */

#include <LmbrCentral_precompiled.h>
#include "LuaHelpers.h"
#include "LuaBuilderWorker.h"

#include <AzCore/Asset/AssetManagerBus.h>
#include <AzCore/Casting/numeric_cast.h>
#include <AzCore/Script/ScriptAsset.h>
#include <AzCore/Script/lua/lua.h>

#include <AssetBuilderSDK/AssetBuilderSDK.h>

namespace LuaBuilder
{
    //////////////////////////////////////////////////////////////////////////
    namespace
    {
        static int LuaStreamWriter(lua_State*, const void* data, size_t size, void* userData)
        {
            using namespace AZ::IO;
            GenericStream* stream = static_cast<GenericStream*>(userData);

            SizeType bytesToWrite = aznumeric_caster(size);
            SizeType bytesWritten = stream->Write(bytesToWrite, data);

            // Return whether or not there was an error
            return bytesWritten == bytesToWrite ? 0 : 1;
        }
    }

    bool LuaDumpToStream(AZ::IO::GenericStream& stream, lua_State* l)
    {
        if (!lua_isfunction(l, -1))
        {
            AZ_TracePrintf(AssetBuilderSDK::ErrorWindow, "Top of stack is not function!");
        }

        return lua_dump(l, LuaStreamWriter, &stream) == 0;
    }
}