/*
 * .============.
 * // M A K E / \
 * // C++ DEV / \
 * // E A S Y / \/ \
 * ++ ----------. \/\ .
 * \\ \ \ /\ /
 * \\ \ \ /
 * \\ \ \ /
 * -============'
 *
 * Copyright (c) 2018 Hevake and contributors, all rights reserved.
 *
 * This file is part of cpp-tbox (https://github.com/cpp-main/cpp-tbox)
 * Use of this source code is governed by MIT license that can be found
 * in the LICENSE file in the root of the source tree. All contributing
 * project authors may be found in the CONTRIBUTORS.md file in the root
 * of the source tree.
 */
#include "log_output.h"

#include <sys/time.h>
#include <sys/syscall.h>
#include <unistd.h>

#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <stdio.h>
#include <mutex>
#include <iostream>

#include "log_impl.h"

#define TIMESTAMP_STRING_SIZE 27

namespace {

 void _GetCurrTimeString(const LogContent *content, char *timestamp)
 {
#if 1
 time_t ts_sec = content->timestamp.sec;
 struct tm tm;
 localtime_r(&ts_sec, &tm);
 char tmp[20];
 strftime(tmp, sizeof(tmp), "%F %H:%M:%S", &tm);
 snprintf(timestamp, TIMESTAMP_STRING_SIZE, "%s.%06u", tmp, content->timestamp.usec);
#else
 snprintf(timestamp, TIMESTAMP_STRING_SIZE, "%u.%06u", content->timestamp.sec, content->timestamp.usec);
#endif
 }

 void _PrintLogToStdout(const LogContent *content)
 {
 char timestamp[TIMESTAMP_STRING_SIZE]; //! "05-13 23:45:07.000000"
 _GetCurrTimeString(content, timestamp);

 //! 打印色彩、等级、时间戳、线程号、模块名
 printf("033円[%sm%c %s %ld %s ",
 TBOX_LOG_LEVEL_COLOR_CODE[content->level], TBOX_LOG_LEVEL_LEVEL_CODE[content->level],
 timestamp, content->thread_id, content->module_id);

 if (content->func_name != nullptr)
 printf("%s() ", content->func_name);

 if (content->text_len > 0)
 printf("%.*s ", content->text_len, content->text_ptr);

 if (content->text_trunc == 1)
 printf("(TRUNCATED) ");

 if (content->file_name != nullptr)
 printf("-- %s:%d", content->file_name, content->line);

 puts("033円[0m"); //! 恢复色彩
 }
}

//! Declare log filte function as weak reference
//! Even if user did't implement their own filter function, it stall works.
bool __attribute((weak)) LogOutput_FilterFunc(const LogContent *content);

extern "C" {

 static void _LogOutput_PrintfFunc(const LogContent *content, void *ptr);
 static uint32_t _id = 0;

 void LogOutput_Enable()
 {
 if (_id == 0)
 _id = LogAddPrintfFunc(_LogOutput_PrintfFunc, nullptr);
 }

 void LogOutput_Disable()
 {
 LogRemovePrintfFunc(_id);
 _id = 0;
 }

 static void _LogOutput_PrintfFunc(const LogContent *content, void *)
 {
 if ((LogOutput_FilterFunc != nullptr) &&
 !LogOutput_FilterFunc(content))
 return;

 _PrintLogToStdout(content);
 }
}