// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.

#pragma once

#include <SPTAG/AnnService/inc/Core/VectorIndex.h>
#include <cstdint>
#include <memory>
#include "VectorIndex.h"
#include "knowhere/index/IndexModel.h"

namespace knowhere {

class CPUKDTRNG : public VectorIndex {
 public:
    CPUKDTRNG() {
        index_ptr_ = SPTAG::VectorIndex::CreateInstance(SPTAG::IndexAlgoType::KDT, SPTAG::VectorValueType::Float);
        index_ptr_->SetParameter("DistCalcMethod", "L2");
    }

 public:
    BinarySet
    Serialize() override;
    VectorIndexPtr
    Clone() override;
    void
    Load(const BinarySet& index_array) override;

 public:
    // PreprocessorPtr
    // BuildPreprocessor(const DatasetPtr &dataset, const Config &config) override;
    int64_t
    Count() override;
    int64_t
    Dimension() override;

    IndexModelPtr
    Train(const DatasetPtr& dataset, const Config& config) override;

    void
    Add(const DatasetPtr& dataset, const Config& config) override;

    DatasetPtr
    Search(const DatasetPtr& dataset, const Config& config) override;
    void
    Seal() override;

 private:
    void
    SetParameters(const Config& config);

 private:
    PreprocessorPtr preprocessor_;
    std::shared_ptr<SPTAG::VectorIndex> index_ptr_;
};

using CPUKDTRNGPtr = std::shared_ptr<CPUKDTRNG>;

class CPUKDTRNGIndexModel : public IndexModel {
 public:
    BinarySet
    Serialize() override;

    void
    Load(const BinarySet& binary) override;

 private:
    std::shared_ptr<SPTAG::VectorIndex> index_;
};

using CPUKDTRNGIndexModelPtr = std::shared_ptr<CPUKDTRNGIndexModel>;

}  // namespace knowhere
