// 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 <cstdio>
#include <cstdlib>
#include <fstream>
#include <string>
#include <vector>

#include "knowhere/adapter/Structure.h"
#include "knowhere/common/Log.h"

class DataGen {
 protected:
    void
    Init_with_default();

    void
    Generate(const int& dim, const int& nb, const int& nq);

    knowhere::DatasetPtr
    GenQuery(const int& nq);

 protected:
    int nb = 10000;
    int nq = 10;
    int dim = 64;
    int k = 10;
    std::vector<float> xb;
    std::vector<float> xq;
    std::vector<int64_t> ids;
    knowhere::DatasetPtr base_dataset = nullptr;
    knowhere::DatasetPtr query_dataset = nullptr;
};

extern void
GenAll(const int64_t dim, const int64_t& nb, std::vector<float>& xb, std::vector<int64_t>& ids, const int64_t& nq,
       std::vector<float>& xq);

extern void
GenAll(const int64_t& dim, const int64_t& nb, float* xb, int64_t* ids, const int64_t& nq, float* xq);

extern void
GenBase(const int64_t& dim, const int64_t& nb, float* xb, int64_t* ids);

extern void
InitLog();

knowhere::DatasetPtr
generate_dataset(int64_t nb, int64_t dim, float* xb, int64_t* ids);

knowhere::DatasetPtr
generate_query_dataset(int64_t nb, int64_t dim, float* xb);

void
AssertAnns(const knowhere::DatasetPtr& result, const int& nq, const int& k);

void
PrintResult(const knowhere::DatasetPtr& result, const int& nq, const int& k);

struct FileIOWriter {
    std::fstream fs;
    std::string name;

    explicit FileIOWriter(const std::string& fname);
    ~FileIOWriter();
    size_t
    operator()(void* ptr, size_t size);
};

struct FileIOReader {
    std::fstream fs;
    std::string name;

    explicit FileIOReader(const std::string& fname);
    ~FileIOReader();
    size_t
    operator()(void* ptr, size_t size);
};
