/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2024- Equinor ASA
//
//  ResInsight is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  ResInsight 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 General Public License at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#include "RiaConnectorTools.h"

#include <QDir>
#include <QFile>
#include <QFileInfo>
#include <QJsonDocument>
#include <QJsonObject>
#include <QOAuth2AuthorizationCodeFlow>
#include <QTextStream>

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
QString RiaConnectorTools::tokenDataAsJson( QOAuth2AuthorizationCodeFlow* authCodeFlow )
{
    QJsonObject obj;
    obj.insert( "token", authCodeFlow->token() );
    obj.insert( "refreshToken", authCodeFlow->refreshToken() );
    if ( authCodeFlow->expirationAt().isValid() )
    {
        obj.insert( "expiration", authCodeFlow->expirationAt().toSecsSinceEpoch() );
    }

    QJsonDocument doc( obj );
    return doc.toJson( QJsonDocument::Indented );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RiaConnectorTools::initializeTokenDataFromJson( QOAuth2AuthorizationCodeFlow* authCodeFlow, const QString& tokenDataJson )
{
    QJsonDocument doc = QJsonDocument::fromJson( tokenDataJson.toUtf8() );
    QJsonObject   obj = doc.object();

    if ( obj.contains( "expiration" ) && obj.contains( "token" ) )
    {
        quint64   secondsSinceEpoch = obj["expiration"].toVariant().toULongLong();
        QDateTime expiration        = QDateTime::fromSecsSinceEpoch( secondsSinceEpoch );
        if ( expiration.isValid() && expiration > QDateTime::currentDateTime() )
        {
            authCodeFlow->setToken( obj["token"].toString() );
        }
    }

    authCodeFlow->setRefreshToken( obj["refreshToken"].toString() );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RiaConnectorTools::writeTokenData( const QString& filePath, const QString& tokenDataJson )
{
    QFile file( filePath );

    // Ensure the directory exists (create it if it doesn't)
    QString dirPath = QFileInfo( file ).absolutePath();
    QDir    dir( dirPath );
    if ( !dir.exists() )
    {
        dir.mkpath( dirPath );
    }

    if ( file.open( QIODevice::WriteOnly ) )
    {
        QTextStream stream( &file );
        stream << tokenDataJson;
        file.close();
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
QString RiaConnectorTools::readTokenData( const QString& filePath )
{
    QFile file( filePath );
    if ( file.open( QIODevice::ReadOnly ) )
    {
        QTextStream stream( &file );
        QString     result = stream.readAll();
        file.close();
        return result;
    }
    return {};
}