#include "UserOperationLog.h"
#include "appvals/AppGlobalValues.h"
#include "models/User.h"
#include <json/jsonobject.h>

#include <QDirIterator>
#include <QDate>
#include <QDir>

namespace
{
    const QString logDir = "./log/UserOperationLog";
}

UserOperationLog::UserOperationLog()
    : QObject()
    , currentFileName()
    , logFile()
    , out()
{
    init();
}

UserOperationLog::~UserOperationLog()
{
    if (logFile.isOpen())
    {
        logFile.flush();
        logFile.close();
    }
}

void UserOperationLog::init() {
    QDir log_dir("./");
    if (!log_dir.exists("log")) log_dir.mkdir("log");
    if (!log_dir.exists(logDir)) log_dir.mkdir(logDir);
    currentFileName = logDir + QDate::currentDate().toString("/yyyy-MM-dd")+QString("-op.log");
    logFile.setFileName(currentFileName);
    if (logFile.exists())
    {
        logFile.open(QFile::OpenModeFlag::Append | QFile::OpenModeFlag::Text);
    } else{
        logFile.open(QFile::OpenModeFlag::NewOnly | QFile::OpenModeFlag::Text);
    }
    out.setDevice(&logFile);
}

const char space = ' ';
QString addSpace(const char* str)
{
    QString s;

    for (int i = 0; str[i]!='\0'; ++i) {
        if (str[i]>='A' && str[i]<='Z' && i>0)
        {
            s.append(space);
            s.append(str[i]);
        } else{
            s.append(str[i]);
        }
    }
    return s;
}

void UserOperationLog::log(const QString& aOperationText)
{
    reloadFile();
    QDateTime now = QDateTime::currentDateTime();
    AppGlobalValues::setLastOperationTime(now);
    QString UserName = (!User::Current() || User::Current()->getUserCode().isEmpty())?"anonymous":User::Current()->getUserCode();
    QString operationText = aOperationText;
    out << now.toString(Qt::DateFormat::ISODateWithMs).replace("T","\t")<<"\t"<<UserName<<"\t"<<operationText.replace("\n","\\n")<<endl;
}

void UserOperationLog::reloadFile() {
    QString newFileName = logDir + QDate::currentDate().toString("/yyyy-MM-dd")+QString("-op.log");
    //inprocessing 暂时没有使用
    if (newFileName == currentFileName) return;
    logFile.close();
    logFile.setFileName(newFileName);
    if (logFile.exists())
    {
        logFile.open(QFile::OpenModeFlag::Append | QFile::OpenModeFlag::Text);
    } else{
        logFile.open(QFile::OpenModeFlag::NewOnly | QFile::OpenModeFlag::Text);
    }
    out.setDevice(&logFile);
}

QStringList UserOperationLog::getHistoryLogFiles() {
    QDirIterator iter(logDir, QDir::Files | QDir::NoSymLinks);
    QStringList list;
    while(iter.hasNext())
    {
        iter.next();
        list << iter.fileInfo().absoluteFilePath();
    }
    return list;
}

void UserOperationLog::loadLogFromFile(QString path, QStringList& result) {
    QFile f;
    f.setFileName(path);
    if (!f.exists()) return;
    if(f.open(QFile::OpenModeFlag::ReadOnly | QFile::OpenModeFlag::Text))
    {

        QTextStream in(&f);
        while(!in.atEnd()){
            result << in.readLine();
        }
    }
}

void UserOperationLog::cleanHistoryLog()
{
    int expireDays = JsonObject::Instance()->getOperationLogExpireDays();
    QDateTime currentDate = QDateTime::currentDateTime();
    QDateTime deleteDate = currentDate.addDays(-expireDays);

    QDir dir(logDir);
    QStringList logFiles = dir.entryList(QStringList() << "*.log", QDir::Files);
    for(const QString &logFile : logFiles)
    {
        QString filePath = logDir + "/" + logFile;
        QFileInfo fileInfo(filePath);
        QDateTime fileDate = fileInfo.created();
        if (fileDate <= deleteDate)
        {
            QFile::remove(filePath);
        }
    }
}