#include "logService.h"
#include <QDebug>
#include <QDir>
#include <QFileInfo>
#include <QFile>
#include <QDateTime>
#include <filesystem>
#include <global.h>

logService* logService::_instance = nullptr;
std::mutex logService::_instanceMutex;

logService* logService::getInstance(){
	std::lock_guard<std::mutex> lock(_instanceMutex);
	if (_instance == nullptr) {
		_instance = new logService();
	}
	return _instance;
}

logService::logService(){
	try {
		// 确保日志目录存在
		std::filesystem::create_directories(logBasePath);
		
		// 初始化日志组件
		qtLogger = std::make_unique<SpdLogger>(const_cast<std::string&>(logBasePath), "Log");
		_logToQtWidget = std::make_unique<logToQtWidget>();
		
		// STD日志重定向器
		_stdConsoleRedirector = std::make_unique<stdConsoleRedirector>(std::cout);
		
		// QT日志重定向器
		_qtRediretor = std::make_unique<qtRediretor>();
		
		// STD日志到Qt日志界面、Qt主界面、spdLog
		_stdConsoleRedirector->registerCallback("qtLogWidget",[this](const std::string& output) {
			if (!output.empty() && output != "\n") {
				QString outPutMsg = QString::fromStdString(output);
				_logToQtWidget->sendStdLogSignal(outPutMsg); // Qt日志界面
				_logToQtWidget->sendMainWindowStdLogSignal(outPutMsg); // Qt主界面
				qtLogger->LogDebug("[STD]" + output); // spdLog
			}
		});
		
		// STD日志到控制台
		_stdConsoleRedirector->registerCallback("console",[this](const std::string& output) {
			if (!output.empty() && output != "\n") {
				_stdConsoleRedirector->writeToConsole(output);
			}
		});

		// STD日志到加载界面
		_stdConsoleRedirector->registerCallback("loadingWidget", [this](const std::string& output) {
			if (!output.empty() && output != "\n") {
				emit  _logToQtWidget->loadingWindow_appendConsoleLog(QString::fromStdString(output));
			}
			});

		// QT日志到spdLog和Qt日志界面
		_qtRediretor->registerCallback("qtLogWidget",[this](const QString& output) {
			if (!output.isEmpty()) {
				qtLogger->LogDebug("[QT]" + output.toStdString());
				_logToQtWidget->sendQtLogSignal(output); // Qt日志界面
			}
		});
		
		// QT日志到控制台
		_qtRediretor->registerCallback("console", [this](const QString& output) {
			if (!output.isEmpty()) {
				_stdConsoleRedirector->writeToConsole(output.toStdString());
			}
		});
		
		// 清理超出保留天数的旧日志文件
		cleanupOldLogs();

	} catch (const std::exception& e) {
		qDebug() << "Failed to initialize logService:" << e.what();
	}
}
// 删除超出保留天数的旧日志文件
void logService::cleanupOldLogs() {
	try {
		int saveDays = logSaveDays;
		if (saveDays <= 0) {
			return;
		}

		QDir logDir(QString::fromStdString(logBasePath));
		if (!logDir.exists()) {
			return;
		}

		QDateTime deadline = QDateTime::currentDateTime().addDays(-saveDays);
		const QFileInfoList fileList = logDir.entryInfoList(QStringList() << "*.log" << "*_*-*-*.log", QDir::Files, QDir::Name);
		int deleteCount = 0;

		for (const auto& fileInfo : fileList) {
			if (fileInfo.lastModified() < deadline) {
				if (QFile::remove(fileInfo.absoluteFilePath())) {
					deleteCount++;
					qDebug() << "[日志清理] 删除旧日志文件:" << fileInfo.fileName();
				} else {
					qWarning() << "[日志清理] 删除失败:" << fileInfo.absoluteFilePath();
				}
			}
		}

		if (deleteCount > 0) {
			qDebug() << "[日志清理] 完成，共删除" << deleteCount << "个旧日志文件";
		}
	}
	catch (const std::exception& e) {
		qCritical() << "[日志清理] 异常:" << e.what();
	}
	catch (...) {
		qCritical() << "[日志清理] 未知异常";
	}
}

logService::~logService() {
	try {
		_stdConsoleRedirector.reset();
		_qtRediretor.reset();
		_logToQtWidget.reset();
		qtLogger.reset();
	}
	catch (const std::exception& e) {
		// 析构函数中不应抛出异常，只记录错误
		qDebug() << "Error in logService destructor:" << e.what();
	}
}