/****************************************************************************
 ** Modern Linbo GUI
 ** Copyright (C) 2020  Dorian Zedler <dorian@itsblue.de>
 **
 ** This program is free software: you can redistribute it and/or modify
 ** it under the terms of the GNU Affero General Public License as published
 ** by the Free Software Foundation, either version 3 of the License, or
 ** (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU Affero General Public License for more details.
 **
 ** You should have received a copy of the GNU Affero General Public License
 ** along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ****************************************************************************/

#include "linbologger.h"

LinboLogger::LinboLogger(QString logFilePath, QObject *parent) : QObject(parent)
{
    this->logFilePath = logFilePath;
}

QString LinboLogger::logTypeToString(LinboLogType logType) {
    switch (logType) {
    case LinboLogType::StdErr:
        return "StdErr";
    case LinboLogType::StdOut:
        return "StdOut";
    case LinboLogType::LinboGuiInfo:
        return "Info";
    case LinboLogType::LinboGuiError:
        return "Error";
    case LinboLogType::LinboLogChapterBeginning:
        return "+++ Chapter +++";
    case LinboLogType::LinboLogChapterEnd:
        return "+++ Chapter end +++";
    default:
        return "UNKNOW";
    }
}

void LinboLogger::log(QString logText, LinboLogType logType) {
    if(logText.isEmpty() || logText == "")
        return;
    qDebug() << qPrintable("[" + this->logTypeToString(logType) + "]") << logText;

    LinboLog latestLog {logText, logType, QDateTime::currentDateTime()};
    this->logHistory.append(latestLog);

    // TODO: Log error, when this fails
    this->writeToLogFile("[" + this->logTypeToString(logType) + "] " + logText);

    emit this->latestLogChanged(latestLog);
}

bool LinboLogger::writeToLogFile(QString text) {
    // write to logfile
    QFile logfile(this->logFilePath);
    if(!logfile.open( QIODevice::WriteOnly | QIODevice::Append ))
        return false;

    QTextStream logstream( &logfile );
    logstream << text << "\n";
    logfile.flush();
    logfile.close();
    return true;
}

const LinboLogger::LinboLog& LinboLogger::getLatestLog() {
    return this->logHistory.last();
}

QList<LinboLogger::LinboLog> LinboLogger::getLogs() {
    return this->logHistory;
}

QList<LinboLogger::LinboLog> LinboLogger::getLogsOfCurrentChapter() {
    QList<LinboLog> tmpLogs;

    for(int i = this->logHistory.length() - 1; i >= 0; i--) {
        tmpLogs.append(this->logHistory[i]);
        if(this->logHistory[i].type == LinboLogType::LinboLogChapterBeginning)
            break;
        else if(this->logHistory[i].type == LinboLogType::LinboLogChapterEnd)
            tmpLogs.clear();
    }

    return tmpLogs;
}

QList<LinboLogger::LinboLog> LinboLogger::getFilterLogs(QList<LinboLog> logs, LinboLogType filterType) {
    QList<LinboLog> tmpLogs;

    for(LinboLog log : logs) {
        if((log.type & filterType) == log.type)
            tmpLogs.append(log);
    }

    return tmpLogs;
}


QStringList LinboLogger::logsToStacktrace(QList<LinboLog> logs, int limit) {
    QStringList logStrings;
    for(int i = 0; i < logs.length(); i++) {
        if(logStrings.length() >= limit)
            break;

        logStrings.append("#" + QString::number(logStrings.length() +1) + " [" + LinboLogger::logTypeToString(logs[i].type) + "] " + logs[i].message);
    }

    return logStrings;
}