// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed 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 <memory>
#include <utility>

#include "VecImpl.h"

namespace milvus {
namespace engine {

class BinVecImpl : public VecIndexImpl {
 public:
    explicit BinVecImpl(std::shared_ptr<knowhere::VectorIndex> index, const IndexType& type)
        : VecIndexImpl(std::move(index), type) {
    }

    Status
    BuildAll(const int64_t& nb, const uint8_t* xb, const int64_t* ids, const Config& cfg, const int64_t& nt,
             const uint8_t* xt) override;
    Status
    Search(const int64_t& nq, const uint8_t* xq, float* dist, int64_t* ids, const Config& cfg) override;

    Status
    Add(const int64_t& nb, const uint8_t* xb, const int64_t* ids, const Config& cfg) override;

    VecIndexPtr
    CopyToGpu(const int64_t& device_id, const Config& cfg) override;

    Status
    SetBlacklist(faiss::ConcurrentBitsetPtr list) override;

    Status
    GetBlacklist(faiss::ConcurrentBitsetPtr& list) override;

    //    Status
    //    SearchById(const int64_t& nq, const uint8_t* xq, faiss::ConcurrentBitsetPtr bitset, float* dist, int64_t* ids,
    //               const Config& cfg) override;

    Status
    GetVectorById(const int64_t n, const int64_t* xid, uint8_t* x, const Config& cfg) override;

    Status
    SearchById(const int64_t& nq, const int64_t* xq, float* dist, int64_t* ids, const Config& cfg) override;

    VecIndexPtr
    CopyToCpu(const Config& cfg) override;
};

class BinBFIndex : public BinVecImpl {
 public:
    explicit BinBFIndex(std::shared_ptr<knowhere::VectorIndex> index)
        : BinVecImpl(std::move(index), IndexType::FAISS_BIN_IDMAP) {
    }

    ErrorCode
    Build(const Config& cfg);

    Status
    BuildAll(const int64_t& nb, const uint8_t* xb, const int64_t* ids, const Config& cfg, const int64_t& nt,
             const uint8_t* xt) override;

    const uint8_t*
    GetRawVectors();

    const int64_t*
    GetRawIds();

    Status
    AddWithoutIds(const int64_t& nb, const uint8_t* xb, const Config& cfg);
};

}  // namespace engine
}  // namespace milvus