#include "filelogger.h"
#include <QTime>
#include <QStringList>
#include <QThread>
#include <QtGlobal>
#include <QFile>
#include <QTimerEvent>
#include <QDir>
#include <QFileInfo>
#include <stdio.h>
#include<iostream>
#include<string>
#include<QDate>
#include "LogInfo.h"
#define LOG_FILE_PATH "/home/plg/loginfo/"

void FileLogger::refreshSettings()
{
    mutex.lock();
    QString oldFileName=fileName;

    settings->sync(); 
    fileName = LOG_FILE_PATH;
//   fileName=settings->value("fileName").toString();
//   LogInfo::setRunStatusText(tr("fileName: %1").arg(fileName));
   QDate today = QDate::currentDate();
   QString todayString=today.toString(Qt::ISODate);
   // 计算前七天的日期
   //QDate oneWeekAgo = today.addDays(-7);
   fileName+=today.toString(Qt::ISODate);
   fileName+="/";
   fileName+="log.txt";
   static QString lastDay = "";
   if(lastDay!=todayString)
   {
       TimerDel->start(30000);
       lastDay=todayString;
   }


#ifdef Q_OS_WIN32
    if (QDir::isRelativePath(fileName) && settings->format()!=QSettings::NativeFormat)
#else
    if (QDir::isRelativePath(fileName))
#endif
    {
        QFileInfo configFile(settings->fileName());
        fileName=QFileInfo(configFile.absolutePath(),fileName).absoluteFilePath();
    }
    maxSize=settings->value("maxSize",0).toLongLong();
    maxBackups=settings->value("maxBackups",0).toInt();
    msgFormat=settings->value("msgFormat","{timestamp} {type} {msg}").toString();
    timestampFormat=settings->value("timestampFormat","yyyy-MM-dd hh:mm:ss.zzz").toString();
    bufferSize=settings->value("bufferSize",0).toInt();

    QByteArray minLevelStr = settings->value("minLevel","ALL").toByteArray();
    if (minLevelStr=="ALL" || minLevelStr=="DEBUG" || minLevelStr=="0")
    {
        minLevel=QtDebugMsg;
    }
    else if (minLevelStr=="WARNING" || minLevelStr=="WARN" || minLevelStr=="1")
    {
        minLevel=QtWarningMsg;
    }
    else if (minLevelStr=="ERROR" || minLevelStr=="CRITICAL" || minLevelStr=="2")
    {
        minLevel=QtCriticalMsg;
    }
    else if (minLevelStr=="FATAL" || minLevelStr=="3")
    {
       // minLevel=QtMsgType::QtFatalMsg;
        minLevel=QtFatalMsg;
    }
//    else if (minLevelStr=="INFO" || minLevelStr=="4")
//    {
//        minLevel=QtMsgType::QtInfoMsg;
//    }

    if (oldFileName!=fileName)
    {
        fprintf(stderr,"Logging to %s\n",qPrintable(fileName));
        close();
        open();
    }
    mutex.unlock();
}


FileLogger::FileLogger(QSettings *settings, const int refreshInterval, QObject* parent)
    : Logger(parent)
{
    TimerDel = new QTimer(this);
    connect(TimerDel,SIGNAL(timeout()),this,SLOT(timeOutToDelete()));
    Q_ASSERT(settings!=nullptr);
    Q_ASSERT(refreshInterval>=0);
    this->settings=settings;
    file=nullptr;
    if (refreshInterval>0)
    {
        refreshTimer.start(refreshInterval,this);
    }
    flushTimer.start(1000,this);
    refreshSettings();
}


FileLogger::~FileLogger()
{
    close();
}


void FileLogger::write(const LogMessage* logMessage)
{
    if (file)
    {
//        qDebug()<<"Critical message output test\n";
//        qCritical("This is a critical message of test\n");
        file->write(qPrintable(logMessage->toString(msgFormat,timestampFormat)));

        if (logMessage->getType()>=QtCriticalMsg)
        {
            file->flush();
        }

        if (file->error())
        {
            qWarning("Cannot write to log file %s: %s",qPrintable(fileName),qPrintable(file->errorString()));
            close();
        }

    }

    if (!file)
    {
        Logger::write(logMessage);
    }

}

void FileLogger::open()
{
    if (fileName.isEmpty())
    {
        qWarning("Name of logFile is empty");
    }
    else {
        file=new QFile(fileName);
        QFileInfo fileInfo(fileName);
        // 检查文件路径是否有效
        if (!fileInfo.exists()) {
            // 获取文件所在的目录路径
            QString dirPath = QFileInfo(fileName).absoluteDir().path();
            // 检查目录是否存在
            if (!QDir(dirPath).exists()) {
                // 如果目录不存在，则创建目录
                QDir().mkpath(dirPath);
                if (!QDir(dirPath).exists()) {
                    // 如果创建目录失败，显示错误消息
                    qDebug("Cannot create directory for log file: %s", qPrintable(dirPath));
                    delete file;
                    file = nullptr;
                    return;
                }
            }
        }
        if (!file->open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text))
        {
            qWarning("Cannot open log file %s: %s",qPrintable(fileName),qPrintable(file->errorString()));
            file=nullptr;
        }
    }
}


void FileLogger::close()
{
    if (file)
    {
        file->close();
        delete file;
        file=nullptr;
    }
}

void FileLogger::rotate() {
     int count=0;
    forever
    {
        QFile bakFile(QString("%1.%2").arg(fileName).arg(count+1));
        if (bakFile.exists())
        {
            ++count;
        }
        else
        {
            break;
        }
    }

    while (maxBackups>0 && count>=maxBackups)
    {
         QFile::remove(QString("%1.%2").arg(fileName).arg(count));
        --count;
    }

    for (int i=count; i>0; --i) {
        QFile::rename(QString("%1.%2").arg(fileName).arg(i),QString("%1.%2").arg(fileName).arg(i+1));
    }

    QFile::rename(fileName,fileName+".1");

}


void FileLogger::timerEvent(QTimerEvent* event)
{
    if (!event)
    {
        return;
    }
    else if (event->timerId()==refreshTimer.timerId())
    {
        refreshSettings();
    }
    else if (event->timerId()==flushTimer.timerId() && file)
    {
        mutex.lock();

        file->flush();

        if (maxSize>0 && file->size()>=maxSize)
        {
            close();
            rotate();
            open();
        }

        mutex.unlock();
    }
}

bool FileLogger::removeDirectory(const QString &directoryPath) {
    // 检查目录是否存在
    QDir dir(directoryPath);
    if (dir.exists()) {
        system((char *)((QString("rm -r %1").arg(directoryPath)).toLatin1().data()));
        return true;
        }
    return false;
}

void FileLogger::timeOutToDelete(){
    QDate today = QDate::currentDate();
    for(int daysAgo=14;daysAgo>=7;--daysAgo){
        QString needToDelFoldPath=LOG_FILE_PATH;
        QDate pastDate=today.addDays(-daysAgo);
        needToDelFoldPath+=pastDate.toString(Qt::ISODate);
        needToDelFoldPath+="/";
        if (QDir(needToDelFoldPath).exists()) {
            bool result=  removeDirectory(needToDelFoldPath);
            if(result){
                qDebug()<<"The directory and all its contents have been removed";
                LogInfo::setRunStatusText(tr("The directory and all its contents have been removed"));
            }else{
                qDebug() << "Failed to remove the directory";
                LogInfo::setRunStatusText(tr("Failed to remove the directory"));
            }
        }
    }
    TimerDel->stop();
}