#include "log_handler.h"

void LogHandler::_log(QtMsgType msgType, const QMessageLogContext &context, const QString &msg) {
    // 加锁
    static QMutex mutex;
    static int count = 0;
    QString type;
    switch(msgType) {
        case QtDebugMsg:
            type = QString("Debug");
            break;
        case QtWarningMsg:
            type = QString("Warning");
            break;
        case QtCriticalMsg:
            type = QString("Critical");
            break;
        case QtFatalMsg:
            type = QString("Fatal");
            break;
        default:
            type = QString("Info");
    }
    mutex.lock();
    QString context_info = QString("%1#%2@%3").arg(context.file).arg(context.function).arg(context.line);
    QString current_date_time = QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss");
    QString current_date = QString("(%1)").arg(current_date_time);
    QString message = QString("%1|%2|%3: %4").arg(current_date, type, context_info, msg);
    _write(message);
    mutex.unlock();

    count ++;
    if(count > 5000){
        count = 0;
        _clear();
    }
}


void LogHandler::init() {
    qInstallMessageHandler(_log);
    auto logDir = QCoreApplication::applicationDirPath() + LogConfig::getIns()->getFileDir();
    QDir dir(logDir);
    if (!dir.exists()){
        dir.mkdir(logDir);
    }
    _clear();
}

void LogHandler::_clear() {
    auto logCof = LogConfig::getIns();
    auto logDir = QCoreApplication::applicationDirPath() + logCof->getFileDir();
    QDir dir(logDir);
    QFileInfoList fileInfos = dir.entryInfoList(QDir::Files);
    auto validity = logCof->getValidity();
    foreach (QFileInfo fileInfo, fileInfos) {
        if(fileInfo.birthTime().addDays(validity) <= QDateTime::currentDateTime()){
            QFile::setPermissions(logDir + "/" +fileInfo.fileName(), QFileDevice::ReadOther | QFileDevice::WriteOther);
            QFile::remove(logDir + "/" +fileInfo.fileName());
        }
    }
}

void LogHandler::_write(const QString& message) {
    auto filename = QDateTime::currentDateTime().toString("yyyy-MM-dd");
    auto filepath = QCoreApplication::applicationDirPath() + LogConfig::getIns()->getFileDir() + "/" + filename + ".log";

    int i = 1;
    QFile file(filepath);
    while(file.size() >= LogConfig::getIns()->getFileSize()){
        auto nextFilename= filename + "_" + i + ".log";
        file.setFileName(nextFilename);
        i++;
    }

    if(file.open(QIODevice::WriteOnly | QIODevice::Append)){
        QTextStream write(&file);
        write.setCodec("utf-8");
        write << message << "\r\n";
        file.flush();
        file.close();
    }
}