#ifndef SYSTEM_LOG_MANAGER_H
#define SYSTEM_LOG_MANAGER_H

#include <string>
#include <memory>
#include <mutex>
#include <chrono>
#include "Database.h"

class SystemLogManager {
public:
    enum class LogType {
        Info,
        Error,
        Operation,
        Unknown
    };

    // »ñÈ¡µ¥ÀýʵÀý
    static SystemLogManager& getInstance();

    // ÉèÖÃÊý¾Ý¿âÁ¬½Ó
    void setDatabase(std::unique_ptr<BL::Database>& db);

    // ³õʼ»¯ÈÕÖ¾±í
    bool initializeLogTable();

    // Ìí¼ÓÈÕÖ¾
    bool log(LogType logType, const std::string& event);
    bool log(LogType logType, const std::string& event, const std::string& username);

	// »ñÈ¡ÈÕÖ¾
    std::vector<std::vector<std::string>> SystemLogManager::getLogs(int startPosition = -1, int count = -1);

    // »ñȡɸѡºóµÄÈÕÖ¾Êý¾Ý
    std::vector<std::vector<std::string>> getFilteredLogs(
        const std::string& logType,
        const std::string& username,
        const std::string& description,
        const std::string& startTime,
        const std::string& endTime,
        int pageNumber,
        int pageSize);

    // »ñÈ¡·ûºÏÌõ¼þµÄÈÕÖ¾×ÜÊý
    int getTotalLogCount(
        const std::string& logType,
        const std::string& username,
        const std::string& description,
        const std::string& startTime,
        const std::string& endTime);

    // ÇåÀí³¬¹ýÖ¸¶¨ÌìÊýµÄ¾ÉÈÕÖ¾
    void cleanOldLogs(int daysToKeep = 30);

private:
    // ¹¹Ô캯Êý£¨Ë½Óл¯£©
    SystemLogManager();

    // ½ûÖ¹¿½±´ºÍ¸³Öµ
    SystemLogManager(const SystemLogManager&) = delete;
    SystemLogManager& operator=(const SystemLogManager&) = delete;

    // ת»»ÈÕÖ¾ÀàÐÍΪ×Ö·û´®
    std::string logTypeToString(LogType logType) const;

    // Êý¾Ý¿âÁ¬½Ó
    std::unique_ptr<BL::Database>* m_pDB;

    // µ¥ÀýʵÀý
    static std::unique_ptr<SystemLogManager> m_instance;

    // Ḭ̈߳²È«Ëø
    static std::mutex m_mutex;
};

#endif // SYSTEM_LOG_MANAGER_H