#ifndef LINUX_EVENT_H
#define LINUX_EVENT_H

#include <sys/epoll.h>
#include <sys/eventfd.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <cstring>
#include <iostream>
#include <vector>
#include <mutex>
#include <unordered_map>
#include <memory>
#include <system_error>
// 辅助函数：生成带时间戳的日志前缀
inline std::string getLogPrefix() {
    auto now = std::chrono::system_clock::now();
    std::time_t time = std::chrono::system_clock::to_time_t(now);
    char timeStr[26];
    ctime_r(&time, timeStr);
    timeStr[24] = '\0';  // 移除换行符
    return "[" + std::string(timeStr) + "] [WARNING] ";
}

class LinuxEvent {
public:
    enum EventType {
        AUTO_RESET,
        MANUAL_RESET
    };

    LinuxEvent(EventType type = MANUAL_RESET, bool initialState = false);
    ~LinuxEvent();

    // 禁止拷贝和赋值
    LinuxEvent(const LinuxEvent&) = delete;
    LinuxEvent& operator=(const LinuxEvent&) = delete;
    
    void SetEvent();
    void ResetEvent();
    bool IsSet() const;
    int GetFD() const;
    bool Wait(unsigned long timeoutMs = (unsigned long)-1);
    static int WaitForMultipleEvents(LinuxEvent** events, int count, unsigned long timeoutMs);
    static int WaitForMultipleEvents(std::vector<std::shared_ptr<LinuxEvent>>& events, unsigned long timeoutMs);
    // 跨进程支持
    static std::shared_ptr<LinuxEvent> OpenEvent(const char* name, bool inheritHandle = false);
    static std::shared_ptr<LinuxEvent> CreateEvent(EventType type, bool initialState, const char* name ="");
    static void CleanupNamedEvents();

private:
    mutable std::mutex m_mutex;
    int m_fd;
    EventType m_type;
    bool m_state;
    std::string m_name; // 用于命名事件

    // 用于命名事件管理的静态成员
    static std::mutex s_namedEventsMutex;
    static std::unordered_map<std::string, std::weak_ptr<LinuxEvent>> s_namedEvents;
};

#endif // LINUX_EVENT_H