#ifndef __sys_logger_h_
#define __sys_logger_h_

#include <stdio.h>
#include <iostream>
#include <cstring>
#include <stdarg.h>
#include <time.h>
#include <mutex>
//#include <unistd.h>
//#include <pthread.h>
//#include <sys/time.h>
//#include <sys/syscall.h>

//#define gettid() GetCurrentThreadId()
#define gettid() 0

#define LEVEL_SOCKET_DEBUG  0
#define LEVEL_DEBUG         1
#define LEVEL_INFO          2
#define LEVEL_WARNING       3
#define LEVEL_ERROR         4

#define LOG_BUF_SIZE        2048
#define MAX_FILENAME_LEN    256


#define LOG_INFO_NOLOCK(format, ...) \
    SysLogger::GetInstance()->WriteLogNoLock(LEVEL_INFO, \
    __FILE__,__FUNCTION__, __LINE__, gettid(), \
    format, ##__VA_ARGS__)

#define SOCKET_DEBUG(format, ...) \
    SysLogger::GetInstance()->WriteLog(LEVEL_SOCKET_DEBUG, \
    __FILE__,__FUNCTION__, __LINE__, gettid(), \
    format, ##__VA_ARGS__)

#define LOG_DEBUG(format, ...) \
    SysLogger::GetInstance()->WriteLog(LEVEL_DEBUG, \
    __FILE__,__FUNCTION__, __LINE__, gettid(), \
    format, ##__VA_ARGS__)

#define LOG_INFO(format, ...) \
    SysLogger::GetInstance()->WriteLog(LEVEL_INFO, \
    __FILE__,__FUNCTION__, __LINE__, gettid(), \
    format, ##__VA_ARGS__)

#define LOG_WARNING(format, ...) \
    SysLogger::GetInstance()->WriteLog(LEVEL_WARNING, \
    __FILE__,__FUNCTION__, __LINE__, gettid(), \
    format, ##__VA_ARGS__)

#define LOG_ERROR(format, ...) \
    SysLogger::GetInstance()->WriteLog(LEVEL_ERROR, \
    __FILE__,__FUNCTION__, __LINE__, gettid(), \
    format, ##__VA_ARGS__)

class SysLogger
{
public:
    ~SysLogger();
    
    static SysLogger* GetInstance();
    static void DestroyInstance();
    bool InitLogger(const char* file_name, int min_level);
    void WriteLog(int level, const char* exec_file, const char*func, int exec_line, int tid, const char* format, ...);
    void WriteLogNoLock(int level, const char* exec_file, const char*func, int exec_line, int tid, const char* format, ...);

private:
    void set_log(int level, const char* exec_file, const char*func, int exec_line, int tid, const char* format, va_list valst);
    
public:
    static SysLogger*   instance_;

private:
    SysLogger();
    SysLogger(const SysLogger&){};//No copy
    int     m_minLevel;
    char*   m_logFileName;
    char*   m_logBuf;
    FILE*   m_fp;
    bool m_isStarted;
    std::mutex m_mutex;
};

#endif