#include "builder.h"
#include "common.h"

#include <library/cpp/codecs/static/static_codec_info.pb.h>

#include <library/cpp/codecs/codecs.h>

#include <util/generic/yexception.h>
#include <util/string/subst.h>

namespace NCodecs {
    TStaticCodecInfo BuildStaticCodec(const TVector<TString>& trainingData, const TCodecBuildInfo& info) {
        TStaticCodecInfo result;
        TCodecPtr codec = ICodec::GetInstance(info.CodecName);
        Y_ENSURE_EX(codec, TCodecException() << "empty codec is not allowed");

        codec->LearnX(trainingData.begin(), trainingData.end(), info.SampleSizeMultiplier);
        {
            TStringOutput sout{*result.MutableStoredCodec()};
            ICodec::Store(&sout, codec);
        }

        auto& debugInfo = *result.MutableDebugInfo();
        debugInfo.SetStoredCodecHash(DataSignature(result.GetStoredCodec()));
        debugInfo.SetCodecName(info.CodecName);
        debugInfo.SetSampleSizeMultiplier(info.SampleSizeMultiplier);
        debugInfo.SetTimestamp(info.Timestamp);
        debugInfo.SetRevisionInfo(info.RevisionInfo);
        debugInfo.SetTrainingSetComment(info.TrainingSetComment);
        debugInfo.SetTrainingSetResId(info.TrainingSetResId);
        return result;
    }

    TString GetStandardFileName(const TStaticCodecInfo& info) {
        TString cName = info.GetDebugInfo().GetCodecName();
        SubstGlobal(cName, ':', '.');
        return TStringBuilder() << cName << "." << info.GetDebugInfo().GetTimestamp() << ".codec_info";
    }
}