#ifdef __ANDROID__
#include <android/log.h>
#endif

#include "StdInc.h"
#include "CLogger.h"

const std::string CLoggerDomain::DOMAIN_GLOBAL = "global";

CLoggerDomain::CLoggerDomain(const std::string & name) : name(name)
{
	if(name.empty()) throw std::runtime_error("Logger domain cannot be empty.");
}

CLoggerDomain CLoggerDomain::getParent() const
{
	if(isGlobalDomain()) return *this;

	size_t pos = name.find_last_of(".");
	if(pos != std::string::npos)
	{
		return CLoggerDomain(name.substr(0, pos));
	}
	else
	{
		return CLoggerDomain(DOMAIN_GLOBAL);
	}
}

bool CLoggerDomain::isGlobalDomain() const
{
	return name == DOMAIN_GLOBAL;
}

std::string CLoggerDomain::getName() const
{
	return name;
}

CLoggerStream::CLoggerStream(const CLogger & logger, ELogLevel::ELogLevel level) : logger(logger), level(level), sbuffer(nullptr)
{

}

CLoggerStream::~CLoggerStream()
{
	if(sbuffer)
	{
		logger.log(level, sbuffer->str());
		delete sbuffer;
		sbuffer = nullptr;
	}
}

boost::recursive_mutex CLogger::smx;
boost::recursive_mutex CLogManager::smx;

DLL_LINKAGE CLogger * logGlobal = CLogger::getGlobalLogger();

DLL_LINKAGE CLogger * logBonus = CLogger::getLogger(CLoggerDomain("bonus"));
DLL_LINKAGE CLogger * logNetwork = CLogger::getLogger(CLoggerDomain("network"));
DLL_LINKAGE CLogger * logAi = CLogger::getLogger(CLoggerDomain("ai"));
DLL_LINKAGE CLogger * logAnim = CLogger::getLogger(CLoggerDomain("animation"));

CLogger * CLogger::getLogger(const CLoggerDomain & domain)
{
	TLockGuardRec _(smx);

	CLogger * logger = CLogManager::get().getLogger(domain);
	if(logger)
	{
		return logger;
	}
	else
	{
		logger = new CLogger(domain);
		if(domain.isGlobalDomain())
		{
			logger->setLevel(ELogLevel::TRACE);
		}
		CLogManager::get().addLogger(logger);
		return logger;
	}
}

CLogger * CLogger::getGlobalLogger()
{
	return getLogger(CLoggerDomain(CLoggerDomain::DOMAIN_GLOBAL));
}

CLogger::CLogger(const CLoggerDomain & domain) : domain(domain)
{
	if(domain.isGlobalDomain())
	{
		level = ELogLevel::TRACE;
		parent = nullptr;
	}
	else
	{
		level = ELogLevel::NOT_SET;
		parent = getLogger(domain.getParent());
	}
}

void CLogger::trace(const std::string & message) const
{
	log(ELogLevel::TRACE, message);
}

CLoggerStream CLogger::traceStream() const
{
	return CLoggerStream(*this, ELogLevel::TRACE);
}

void CLogger::debug(const std::string & message) const
{
	log(ELogLevel::DEBUG, message);
}

CLoggerStream CLogger::debugStream() const
{
	return CLoggerStream(*this, ELogLevel::DEBUG);
}

void CLogger::info(const std::string & message) const
{
	log(ELogLevel::INFO, message);
}

CLoggerStream CLogger::infoStream() const
{
	return CLoggerStream(*this, ELogLevel::INFO);
}

void CLogger::warn(const std::string & message) const
{
	log(ELogLevel::WARN, message);
}

CLoggerStream CLogger::warnStream() const
{
	return CLoggerStream(*this, ELogLevel::WARN);
}

void CLogger::error(const std::string & message) const
{
	log(ELogLevel::ERROR, message);
}

CLoggerStream CLogger::errorStream() const
{
	return CLoggerStream(*this, ELogLevel::ERROR);
}

void CLogger::log(ELogLevel::ELogLevel level, const std::string & message) const
{
	if(getEffectiveLevel() <= level)
	{
		callTargets(LogRecord(domain, level, message));
	}
}

ELogLevel::ELogLevel CLogger::getLevel() const
{
	TLockGuard _(mx);
	return level;
}

void CLogger::setLevel(ELogLevel::ELogLevel level)
{
	TLockGuard _(mx);
	if(domain.isGlobalDomain() && level == ELogLevel::NOT_SET) return;
	this->level = level;
}

const CLoggerDomain & CLogger::getDomain() const
{
	return domain;
}

void CLogger::addTarget(unique_ptr<ILogTarget> && target)
{
	TLockGuard _(mx);
	targets.push_back(std::move(target));
}

ELogLevel::ELogLevel CLogger::getEffectiveLevel() const
{
	for(const CLogger * logger = this; logger != nullptr; logger = logger->parent)
	{
		if(logger->getLevel() != ELogLevel::NOT_SET) return logger->getLevel();
	}

	// This shouldn't be reached, as the root logger must have set a log level
	return ELogLevel::INFO;
}

void CLogger::callTargets(const LogRecord & record) const
{
	TLockGuard _(mx);
	for(const CLogger * logger = this; logger != nullptr; logger = logger->parent)
	{
		for(auto & target : logger->targets)
		{
			target->write(record);
		}
	}
}

void CLogger::clearTargets()
{
	TLockGuard _(mx);
	targets.clear();
}

bool CLogger::isDebugEnabled() const
{
	return getEffectiveLevel() <= ELogLevel::DEBUG;
}

bool CLogger::isTraceEnabled() const
{
	return getEffectiveLevel() <= ELogLevel::TRACE;
}

CTraceLogger::CTraceLogger(const CLogger * logger, const std::string & beginMessage, const std::string & endMessage)
	: logger(logger), endMessage(endMessage)
{
	logger->traceStream() << beginMessage;
}

CTraceLogger::~CTraceLogger()
{
	logger->traceStream() << endMessage;
}

CLogManager & CLogManager::get()
{
	TLockGuardRec _(smx);
	static CLogManager instance;
	return instance;
}

CLogManager::CLogManager()
{

}

CLogManager::~CLogManager()
{
	for(auto & i : loggers)
	{
		delete i.second;
	}
}

void CLogManager::addLogger(CLogger * logger)
{
	TLockGuard _(mx);
	loggers[logger->getDomain().getName()] = logger;
}

CLogger * CLogManager::getLogger(const CLoggerDomain & domain)
{
	TLockGuard _(mx);
	auto it = loggers.find(domain.getName());
	if(it != loggers.end())
	{
		return it->second;
	}
	else
	{
		return nullptr;
	}
}

CLogFormatter::CLogFormatter() : pattern("%m")
{
	boost::posix_time::time_facet * facet = new boost::posix_time::time_facet("%H:%M:%S");
	dateStream.imbue(std::locale(dateStream.getloc(), facet));
}

CLogFormatter::CLogFormatter(const std::string & pattern)
{
	setPattern(pattern);
}

CLogFormatter::CLogFormatter(const CLogFormatter & other)
{
	*this = other;
}

CLogFormatter & CLogFormatter::operator=(const CLogFormatter & other)
{
	pattern = other.pattern;
	return *this;
}

std::string CLogFormatter::format(const LogRecord & record) const
{
	std::string message = pattern;

	// Format date
	dateStream.str(std::string());
	dateStream.clear();
	dateStream << record.timeStamp;
	boost::algorithm::replace_first(message, "%d", dateStream.str());

	// Format log level
	std::string level;
	switch(record.level)
	{
	case ELogLevel::TRACE:
		level = "TRACE";
		break;
	case ELogLevel::DEBUG:
		level = "DEBUG";
		break;
	case ELogLevel::INFO:
		level = "INFO";
		break;
	case ELogLevel::WARN:
		level = "WARN";
		break;
	case ELogLevel::ERROR:
		level = "ERROR";
		break;
	}
	boost::algorithm::replace_first(message, "%l", level);

	// Format name, thread id and message
	boost::algorithm::replace_first(message, "%n", record.domain.getName());
	boost::algorithm::replace_first(message, "%t", boost::lexical_cast<std::string>(record.threadId));
	boost::algorithm::replace_first(message, "%m", record.message);

	return message;
}

void CLogFormatter::setPattern(const std::string & pattern)
{
	this->pattern = pattern;
}

const std::string & CLogFormatter::getPattern() const
{
	return pattern;
}

CColorMapping::CColorMapping()
{
	// Set default mappings
	auto & levelMap = map[CLoggerDomain::DOMAIN_GLOBAL];
	levelMap[ELogLevel::TRACE] = EConsoleTextColor::GRAY;
	levelMap[ELogLevel::DEBUG] = EConsoleTextColor::WHITE;
	levelMap[ELogLevel::INFO] = EConsoleTextColor::GREEN;
	levelMap[ELogLevel::WARN] = EConsoleTextColor::YELLOW;
	levelMap[ELogLevel::ERROR] = EConsoleTextColor::RED;
}

void CColorMapping::setColorFor(const CLoggerDomain & domain, ELogLevel::ELogLevel level, EConsoleTextColor::EConsoleTextColor color)
{
	assert(level != ELogLevel::NOT_SET);
	map[domain.getName()][level] = color;
}

EConsoleTextColor::EConsoleTextColor CColorMapping::getColorFor(const CLoggerDomain & domain, ELogLevel::ELogLevel level) const
{
	std::string name = domain.getName();
	while(true)
	{
		const auto & loggerPair = map.find(name);
		if(loggerPair != map.end())
		{
			const auto & levelMap = loggerPair->second;
			const auto & levelPair = levelMap.find(level);
			if(levelPair != levelMap.end())
			{
				return levelPair->second;
			}
		}

		CLoggerDomain currentDomain(name);
		if(!currentDomain.isGlobalDomain())
		{
			name = currentDomain.getParent().getName();
		}
		else
		{
			break;
		}
	}
	throw std::runtime_error("failed to find color for requested domain/level pair");
}

CLogConsoleTarget::CLogConsoleTarget(CConsoleHandler * console) : console(console), threshold(ELogLevel::INFO), coloredOutputEnabled(true)
{
	formatter.setPattern("%m");
}

void CLogConsoleTarget::write(const LogRecord & record)
{
	if(threshold > record.level) return;

	std::string message = formatter.format(record);

#ifdef __ANDROID__
	__android_log_print(ANDROID_LOG_INFO, "VCMI", "%s", message.c_str());
#endif

	bool printToStdErr = record.level >= ELogLevel::WARN;
	if(console)
	{
		if(coloredOutputEnabled)
		{
			console->print(message, true, colorMapping.getColorFor(record.domain, record.level));
		}
		else
		{
			console->print(message, true, EConsoleTextColor::DEFAULT, printToStdErr);
		}
	}
	else
	{
		TLockGuard _(mx);
		if(printToStdErr)
		{
			std::cerr << message << std::endl;
		}
		else
		{
			std::cout << message << std::endl;
		}
	}
}

bool CLogConsoleTarget::isColoredOutputEnabled() const
{
	return coloredOutputEnabled;
}

void CLogConsoleTarget::setColoredOutputEnabled(bool coloredOutputEnabled)
{
	this->coloredOutputEnabled = coloredOutputEnabled;
}

ELogLevel::ELogLevel CLogConsoleTarget::getThreshold() const
{
	return threshold;
}

void CLogConsoleTarget::setThreshold(ELogLevel::ELogLevel threshold)
{
	this->threshold = threshold;
}

const CLogFormatter & CLogConsoleTarget::getFormatter() const
{
	return formatter;
}

void CLogConsoleTarget::setFormatter(const CLogFormatter & formatter)
{
	this->formatter = formatter;
}

const CColorMapping & CLogConsoleTarget::getColorMapping() const
{
	return colorMapping;
}

void CLogConsoleTarget::setColorMapping(const CColorMapping & colorMapping)
{
	this->colorMapping = colorMapping;
}

CLogFileTarget::CLogFileTarget(const std::string & filePath, bool append /*= true*/)
	: file(filePath, append ? std::ios_base::app : std::ios_base::out)
{
	formatter.setPattern("%d %l %n [%t] - %m");
}

CLogFileTarget::~CLogFileTarget()
{
	file.close();
}

void CLogFileTarget::write(const LogRecord & record)
{
	TLockGuard _(mx);
	file << formatter.format(record) << std::endl;
}

const CLogFormatter & CLogFileTarget::getFormatter() const
{
	return formatter;
}

void CLogFileTarget::setFormatter(const CLogFormatter & formatter)
{
	this->formatter = formatter;
}