#include <StdInclude.hpp>

#define IW4X_TECHSET_VERSION "0"

namespace Assets
{
    void IMaterialVertexShader::load(Game::XAssetHeader* header, const std::string& name, Components::ZoneBuilder::Zone* builder)
    {
        if (!header->data) this->loadNative(header, name, builder); // Check if there is a native one
        if (!header->data) this->loadBinary(header, name, builder); // Check if we need to import a new one into the game
    }

    void IMaterialVertexShader::loadNative(Game::XAssetHeader* header, const std::string& name, Components::ZoneBuilder::Zone* /*builder*/)
    {
        header->vertexShader = Components::AssetHandler::FindOriginalAsset(this->getType(), name.data()).vertexShader;
    }

    void IMaterialVertexShader::loadBinary(Game::XAssetHeader* header, const std::string& name, Components::ZoneBuilder::Zone* builder)
    {
        Components::FileSystem::File vsFile(Utils::String::VA("vs/%s.iw4xVS", name.data()));
        if (!vsFile.exists()) return;

        Utils::Stream::Reader reader(builder->getAllocator(), vsFile.getBuffer());

        char* magic = reader.readArray<char>(8);
        if (std::memcmp(magic, "IW4xVERT", 8))
        {
            Components::Logger::Error(Game::ERR_FATAL, "Reading vertex shader '{}' failed, header is invalid!", name);
        }

        std::string version;
        version.push_back(reader.read<char>());
        if (version != IW4X_TECHSET_VERSION)
        {
            Components::Logger::Error(Game::ERR_FATAL, "Reading vertex shader '{}' failed, expected version is {}, but it was {}!",
                name, IW4X_TECHSET_VERSION, version);
        }

        Game::MaterialVertexShader* asset = reader.readObject<Game::MaterialVertexShader>();

        if (asset->name)
        {
            asset->name = reader.readCString();
        }

        if (asset->prog.loadDef.program)
        {
            asset->prog.loadDef.program = reader.readArray<unsigned int>(asset->prog.loadDef.programSize);
        }

        header->vertexShader = asset;
    }

	void IMaterialVertexShader::save(Game::XAssetHeader header, Components::ZoneBuilder::Zone* builder)
	{
		AssertSize(Game::MaterialVertexShader, 16);

		Utils::Stream* buffer = builder->getBuffer();
		Game::MaterialVertexShader* asset = header.vertexShader;
		Game::MaterialVertexShader* dest = buffer->dest<Game::MaterialVertexShader>();
		buffer->save(asset);

		buffer->pushBlock(Game::XFILE_BLOCK_VIRTUAL);

		if (asset->name)
		{
			buffer->saveString(builder->getAssetName(this->getType(), asset->name));
			Utils::Stream::ClearPointer(&dest->name);
		}

		if (asset->prog.loadDef.program)
		{
			buffer->align(Utils::Stream::ALIGN_4);
			buffer->saveArray(asset->prog.loadDef.program, asset->prog.loadDef.programSize);
			Utils::Stream::ClearPointer(&dest->prog.loadDef.program);
		}

		buffer->popBlock();
	}
}