#include "AssetDumperTracer.h"

#include <cassert>
#include <sstream>
#include <type_traits>

#include "Game/IW4/CommonIW4.h"
#include "Game/IW4/ObjConstantsIW4.h"
#include "Game/IW4/InfoString/InfoStringFromStructConverter.h"
#include "Game/IW4/InfoString/TracerFields.h"

using namespace IW4;

namespace IW4
{
    class InfoStringFromTracerConverter final : public InfoStringFromStructConverter
    {
    protected:
        void FillFromExtensionField(const cspField_t& field) override
        {
            assert(false);
        }

    public:
        InfoStringFromTracerConverter(const TracerDef* structure, const cspField_t* fields, const size_t fieldCount, std::function<std::string(scr_string_t)> scriptStringValueCallback)
            : InfoStringFromStructConverter(structure, fields, fieldCount, std::move(scriptStringValueCallback))
        {
        }
    };
}

InfoString AssetDumperTracer::CreateInfoString(XAssetInfo<TracerDef>* asset)
{
    InfoStringFromTracerConverter converter(asset->Asset(), tracer_fields, std::extent<decltype(tracer_fields)>::value, [asset](const scr_string_t scrStr) -> std::string
    {
        assert(scrStr < asset->m_zone->m_script_strings.Count());
        if (scrStr >= asset->m_zone->m_script_strings.Count())
            return "";

        return asset->m_zone->m_script_strings[scrStr];
    });

    return converter.Convert();
}

bool AssetDumperTracer::ShouldDump(XAssetInfo<TracerDef>* asset)
{
    return true;
}

void AssetDumperTracer::DumpAsset(AssetDumpingContext& context, XAssetInfo<TracerDef>* asset)
{
    // Only dump raw when no gdt available
    if (context.m_gdt)
    {
        const auto infoString = CreateInfoString(asset);
        GdtEntry gdtEntry(asset->m_name, ObjConstants::GDF_FILENAME_TRACER);
        infoString.ToGdtProperties(ObjConstants::INFO_STRING_PREFIX_TRACER, gdtEntry);
        context.m_gdt->WriteEntry(gdtEntry);
    }
    else
    {
        const auto assetFile = context.OpenAssetFile("tracer/" + asset->m_name);

        if (!assetFile)
            return;

        auto& stream = *assetFile;
        const auto infoString = CreateInfoString(asset);
        const auto stringValue = infoString.ToString(ObjConstants::INFO_STRING_PREFIX_TRACER);
        stream.write(stringValue.c_str(), stringValue.size());
    }
}