//
// Copyright(c) 2015 Gabi Melman.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
//
//
// spdlog usage example
//
#include "spdlog/spdlog.h"

#include <cstdlib> // EXIT_FAILURE
#include <iostream>
#include <memory>

void async_example();
void syslog_example();
void user_defined_example();

namespace spd = spdlog;
int main(int, char*[])
{
	try {
		// Multithreaded color console
		auto console = spd::stdout_logger_mt("console", true);
		console->info("Welcome to spdlog!");
		console->error("An info message example {}..", 1);
				
		// Formatting examples
		console->warn("Easy padding in numbers like {:08d}", 12);
		console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
		console->info("Support for floats {:03.2f}", 1.23456);
		console->info("Positional args are {1} {0}..", "too", "supported");

		console->info("{:<30}", "left aligned");
		console->info("{:>30}", "right aligned");
		console->info("{:^30}", "centered");

		spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");

		// Runtime log levels
		spd::set_level(spd::level::info); //Set global log level to info
		console->debug("This message shold not be displayed!");
		console->set_level(spd::level::debug); // Set specific logger's log level
		console->debug("This message shold be displayed..");

		// Create basic file logger (not rotated)
		auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic.txt");
		my_logger->info("Some log message");


		// Create a file rotating logger with 5mb size max and 3 rotated files
		auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/mylogfile", 1048576 * 5, 3);
		for (int i = 0; i < 10; ++i)
			rotating_logger->info("{} * {} equals {:>10}", i, i, i*i);

		// Create a daily logger - a new file is created every day on 2:30am
		auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily", 2, 30);
		daily_logger->info(123.44);

		// Customize msg format for all messages
		spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
		rotating_logger->info("This is another message with custom format");


		// Compile time debug or trace macros.
		// Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
		SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
		SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);

		// Asynchronous logging is very fast..
		// Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
		async_example();

		// syslog example. linux/osx only..
		syslog_example();

		// log user-defined types example..
		user_defined_example();


		// Release and close all loggers
		spdlog::drop_all();
	}

	catch (const spd::spdlog_ex& ex) {
		std::cout << "Log failed: " << ex.what() << std::endl;
		return EXIT_FAILURE;
	}
	return EXIT_SUCCESS;
}


void async_example()
{
	size_t q_size = 4096; //queue size must be power of 2
	spdlog::set_async_mode(q_size);
	auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
	for (int i = 0; i < 100; ++i)
		async_file->info("Async message #{}", i);
}

//syslog example (linux/osx only)
void syslog_example()
{
#if defined (__linux__) || defined(__APPLE__)
	std::string ident = "spdlog-example";
	auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
	syslog_logger->warn("This is warning that will end up in syslog. This is Linux only!");
#endif
}

// user defined types logging by implementing operator<< 
struct my_type
{
	int i;
	template<typename OStream>
	friend OStream& operator<<(OStream& os, const my_type &c) {return os << "[my_type i="<<c.i << "]";}
};

#include <spdlog/fmt/ostr.h> // must be included
void user_defined_example()
{
	spd::get("console")->info("user defined type: {}", my_type{ 14 });
}