// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.

#pragma once

#include <restapi/common.h>
#include <cpprest/http_listener.h>

namespace diskann
{
class Server
{
  public:
    Server(web::uri &url, std::vector<std::unique_ptr<diskann::BaseSearch>> &multi_searcher,
           const std::string &typestring);
    virtual ~Server();

    pplx::task<void> open();
    pplx::task<void> close();

  protected:
    template <class T> void handle_post(web::http::http_request message);

    template <typename T>
    web::json::value toJsonArray(const std::vector<T> &v, std::function<web::json::value(const T &)> valConverter);
    web::json::value prepareResponse(const int64_t &queryId, const int k);

    template <class T>
    void parseJson(const utility::string_t &body, unsigned int &k, int64_t &queryId, T *&queryVector,
                   unsigned int &dimensions, unsigned &Ls);

    web::json::value idsToJsonArray(const diskann::SearchResult &result);
    web::json::value distancesToJsonArray(const diskann::SearchResult &result);
    web::json::value tagsToJsonArray(const diskann::SearchResult &result);
    web::json::value partitionsToJsonArray(const diskann::SearchResult &result);

    SearchResult aggregate_results(const unsigned K, const std::vector<diskann::SearchResult> &results);

  private:
    bool _isDebug;
    std::unique_ptr<web::http::experimental::listener::http_listener> _listener;
    const bool _multi_search;
    std::vector<std::unique_ptr<diskann::BaseSearch>> _multi_searcher;
};
} // namespace diskann