//
// Copyright (c) 2013-2024 The SRS Authors
//
// SPDX-License-Identifier: MIT
//

#ifndef SRS_APP_LOG_HPP
#define SRS_APP_LOG_HPP

#include <srs_core.hpp>

#include <string.h>
#include <string>

#include <srs_app_reload.hpp>
#include <srs_protocol_log.hpp>

class SrsThreadMutex;

// For log TAGs.
#define TAG_MAIN "MAIN"
#define TAG_MAYBE "MAYBE"
#define TAG_DTLS_ALERT "DTLS_ALERT"
#define TAG_DTLS_HANG "DTLS_HANG"
#define TAG_RESOURCE_UNSUB "RESOURCE_UNSUB"
#define TAG_LARGE_TIMER "LARGE_TIMER"

// Use memory/disk cache and donot flush when write log.
// it's ok to use it without config, which will log to console, and default trace level.
// when you want to use different level, override this classs, set the protected _level.
class SrsFileLog : public ISrsLog, public ISrsReloadHandler
{
private:
    // Defined in SrsLogLevel.
    SrsLogLevel level_;
private:
    char* log_data;
    // Log to file if specified srs_log_file
    int fd;
    // Whether log to file tank
    bool log_to_file_tank;
    // Whether use utc time.
    bool utc;
    // TODO: FIXME: use macro define like SRS_MULTI_THREAD_LOG to switch enable log mutex or not.
    // Mutex for multithread log.
    SrsThreadMutex* mutex_;
public:
    SrsFileLog();
    virtual ~SrsFileLog();
// Interface ISrsLog
public:
    virtual srs_error_t initialize();
    virtual void reopen();
    virtual void log(SrsLogLevel level, const char* tag, const SrsContextId& context_id, const char* fmt, va_list args);
private:
    virtual void write_log(int& fd, char* str_log, int size, int level);
    virtual void open_log_file();
};

#endif