/*******************************************************************************
Copyright (c) 2023, Jan Koester jan.koester@gmx.net
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Redistribution and use in source and binary forms, with or without
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    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the <organization> nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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*******************************************************************************/

#include <string>
#include <chrono>
#include <mutex>
#include <unordered_map>

#include <uuidp.h>

#include <dbpp/database.h>

#pragma once

namespace blogi {
  class Session {
  public:
    Session(const dbpp::Database &db);
    ~Session();

    const std::string &createSession(std::string &buf,const std::string &useragent);
    void addSessionData(const std::string &sessionid,const char *key,const char *value);
    void delSessionData(const std::string &sessionid,const char *key);
    void getSessionData(const std::string &sessionid,const char *key,std::string &value);

    bool exists(const std::string &sessionid);

  private:

    void            _initSession();

    const dbpp::Database &_sessiondb;

    // In-memory session cache to avoid DB round-trip on every request
    static constexpr int CACHE_TTL_SECONDS = 120;
    static std::mutex _cacheMutex;
    static std::unordered_map<std::string, std::chrono::steady_clock::time_point> _sessionCache;

    friend class Blogi;
  };
};
