/*******************************************************************************
**
** Filename   : util
** Created on : 03 April, 2005
** Copyright  : (c) 2005 Till Adam
** Email      : <adam@kde.org>
**
*******************************************************************************/

/*******************************************************************************
**
**   This program 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 2 of the License, or
**   (at your option) any later version.
**
**   It 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 for more details.
**
**   You should have received a copy of the GNU General Public License
**   along with this program; if not, write to the Free Software
**   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
**
**   In addition, as a special exception, the copyright holders give
**   permission to link the code of this program with any edition of
**   the Qt library by Trolltech AS, Norway (or with modified versions
**   of Qt that use the same license as Qt), and distribute linked
**   combinations including the two.  You must obey the GNU General
**   Public License in all respects for all of the code used other than
**   Qt.  If you modify this file, you may extend this exception to
**   your version of the file, but you are not obligated to do so.  If
**   you do not wish to do so, delete this exception statement from
**   your version.
**
*******************************************************************************/
#include "util.h"
#include "kmkernel.h"

#include "messagecore/utils/stringutil.h"
#include "messagecomposer/helper/messagehelper.h"

#include "templateparser/templateparser.h"

#include <kmime/kmime_message.h>
#include <kmessagebox.h>
#include <KLocalizedString>
#include <KProcess>

#include <KStandardDirs>

#include <QProcess>
#include <QFileInfo>

#include "foldercollection.h"

using namespace MailCommon;


KMime::Types::Mailbox::List KMail::Util::mailingListsFromMessage( const Akonadi::Item& item )
{
    KMime::Types::Mailbox::List addresses;
    // determine the mailing list posting address
    Akonadi::Collection parentCollection = item.parentCollection();
    if ( parentCollection.isValid() ) {
        const QSharedPointer<FolderCollection> fd = FolderCollection::forCollection( parentCollection, false );
        if ( fd->isMailingListEnabled() && !fd->mailingListPostAddress().isEmpty() ) {
            addresses << MessageCore::StringUtil::mailboxFromUnicodeString( fd->mailingListPostAddress() );
        }
    }

    return addresses;
}

Akonadi::Item::Id KMail::Util::putRepliesInSameFolder( const Akonadi::Item& item )
{
    Akonadi::Collection parentCollection = item.parentCollection();
    if ( parentCollection.isValid() ) {
        const QSharedPointer<FolderCollection> fd = FolderCollection::forCollection( parentCollection, false );
        if( fd->putRepliesInSameFolder() ) {
            return parentCollection.id();
        }
    }
    return -1;
}

void KMail::Util::launchAccountWizard( QWidget *w )
{
    QStringList lst;
    lst.append( QLatin1String("--type") );
    lst.append( QLatin1String("message/rfc822") );

    const QString path = KStandardDirs::findExe( QLatin1String("accountwizard" ) );
    if( !QProcess::startDetached( path, lst ) )
        KMessageBox::error( w, i18n( "Could not start the account wizard. "
                                     "Please check your installation." ),
                            i18n( "Unable to start account wizard" ) );

}

bool KMail::Util::handleClickedURL( const KUrl &url, const QSharedPointer<MailCommon::FolderCollection> &folder )
{
    if ( url.protocol() == QLatin1String( "mailto" ) ) {
        KMime::Message::Ptr msg ( new KMime::Message );
        uint identity = !folder.isNull() ? folder->identity() : 0;
        MessageHelper::initHeader( msg, KMKernel::self()->identityManager(), identity );
        msg->contentType()->setCharset("utf-8");

        QMap<QString, QString> fields =  MessageCore::StringUtil::parseMailtoUrl( url );

        msg->to()->fromUnicodeString( fields.value( QLatin1String("to") ),"utf-8" );
        if ( !fields.value( QLatin1String("subject") ).isEmpty() )
            msg->subject()->fromUnicodeString( fields.value( QLatin1String("subject") ),"utf-8" );
        if ( !fields.value( QLatin1String("body") ).isEmpty() )
            msg->setBody( fields.value( QLatin1String("body") ).toUtf8() );
        if ( !fields.value( QLatin1String("cc" )).isEmpty() )
            msg->cc()->fromUnicodeString( fields.value( QLatin1String("cc") ),"utf-8" );

        if ( !folder.isNull() ) {
            TemplateParser::TemplateParser parser( msg, TemplateParser::TemplateParser::NewMessage );
            parser.setIdentityManager( KMKernel::self()->identityManager() );
            parser.process( msg, folder->collection() );
        }

        KMail::Composer * win = KMail::makeComposer( msg, false, false, KMail::Composer::New, identity );
        win->setFocusToSubject();
        if ( !folder.isNull() ) {
            win->setCollectionForNewMessage( folder->collection() );
        }
        win->show();
        return true;
    } else {
        kWarning() << "Can't handle URL:" << url;
        return false;
    }
}

bool KMail::Util::mailingListsHandleURL( const KUrl::List& lst,const QSharedPointer<MailCommon::FolderCollection> &folder )
{
    const QString handler = ( folder->mailingList().handler() == MailingList::KMail )
            ? QLatin1String( "mailto" ) : QLatin1String( "https" );

    KUrl urlToHandle;
    KUrl::List::ConstIterator end( lst.constEnd() );
    for ( KUrl::List::ConstIterator itr = lst.constBegin(); itr != end; ++itr ) {
        if ( handler == (*itr).protocol() ) {
            urlToHandle = *itr;
            break;
        }
    }
    if ( urlToHandle.isEmpty() && !lst.empty() ) {
        urlToHandle = lst.first();
    }

    if ( !urlToHandle.isEmpty() ) {
        return KMail::Util::handleClickedURL( urlToHandle, folder );
    } else {
        kWarning()<< "Can't handle url";
        return false;
    }
}

bool KMail::Util::mailingListPost( const QSharedPointer<MailCommon::FolderCollection> &fd )
{
    if ( fd )
        return KMail::Util::mailingListsHandleURL( fd->mailingList().postUrls(),fd );
    return false;
}

bool KMail::Util::mailingListSubscribe( const QSharedPointer<MailCommon::FolderCollection> &fd )
{
    if ( fd )
        return KMail::Util::mailingListsHandleURL( fd->mailingList().subscribeUrls(),fd );
    return false;
}

bool KMail::Util::mailingListUnsubscribe( const QSharedPointer<MailCommon::FolderCollection> &fd )
{
    if ( fd )
        return KMail::Util::mailingListsHandleURL( fd->mailingList().unsubscribeUrls(),fd );
    return false;
}

bool KMail::Util::mailingListArchives( const QSharedPointer<MailCommon::FolderCollection> &fd )
{
    if ( fd )
        return KMail::Util::mailingListsHandleURL( fd->mailingList().archiveUrls(),fd );
    return false;
}

bool KMail::Util::mailingListHelp( const QSharedPointer<MailCommon::FolderCollection> &fd )
{
    if ( fd )
        return KMail::Util::mailingListsHandleURL( fd->mailingList().helpUrls(),fd );
    return false;
}

void KMail::Util::lastEncryptAndSignState(bool &lastEncrypt, bool &lastSign, const KMime::Message::Ptr& msg)
{
    lastSign = KMime::isSigned(msg.get());
    lastEncrypt = KMime::isEncrypted(msg.get());
}

QColor KMail::Util::misspelledColor()
{
    return QColor(Qt::red);
}

QColor KMail::Util::quoteL1Color()
{
    return QColor( 0x00, 0x80, 0x00 );
}

QColor KMail::Util::quoteL2Color()
{
    return QColor( 0x00, 0x70, 0x00 );
}

QColor KMail::Util::quoteL3Color()
{
    return QColor( 0x00, 0x60, 0x00 );
}


void KMail::Util::reduceQuery(QString &query)
{
    QRegExp rx(QLatin1String("<[\\w]+://[\\w\\d-_.]+(/[\\d\\w/-._]+/)*([\\w\\d-._]+)#([\\w\\d]+)>"));
    query.replace(rx,QLatin1String("\\2:\\3"));
    query.replace( QLatin1String("rdf-schema:"), QLatin1String("rdfs:") );
    query.replace( QLatin1String("22-rdf-syntax-ns:"), QLatin1String("rdf:") );
    query.replace( QLatin1String("XMLSchema:"), QLatin1String("xsd:") );
    query = query.simplified();
}

void KMail::Util::migrateFromKMail1()
{
    // Akonadi migration
    // check if there is something to migrate at all
    bool needMigration = true;
    KConfig oldKMailConfig( QLatin1String("kmailrc"), KConfig::NoGlobals );
    if ( oldKMailConfig.hasGroup("General") ||
         ( oldKMailConfig.groupList().count() == 1 &&
           oldKMailConfig.groupList().first() == QLatin1String("$Version") ) ) {
        const QFileInfo oldDataDirFileInfo( KStandardDirs::locateLocal( "data", QLatin1String("kmail") ) );
        if ( !oldDataDirFileInfo.exists() || !oldDataDirFileInfo.isDir() ) {
            // neither config or data, the migrator cannot do anything useful anyways
            needMigration = false;
        }
    } else {
        needMigration = false;
    }

    KConfig config( QLatin1String("kmail-migratorrc") );
    KConfigGroup migrationCfg( &config, "Migration" );
    if ( needMigration ) {
        const bool enabled = migrationCfg.readEntry( "Enabled", false );
        const int currentVersion = migrationCfg.readEntry( "Version", 0 );
        const int targetVersion = migrationCfg.readEntry( "TargetVersion", 1 );
        if ( enabled && currentVersion < targetVersion ) {
            const int choice = KMessageBox::questionYesNoCancel( 0, i18n(
                                                                     "<b>Thanks for using KMail2!</b>"
                                                                     "<p>KMail2 uses a new storage technology that requires migration of your current KMail data and configuration.</p>\n"
                                                                     "<p>The conversion process can take a lot of time (depending on the amount of email you have) and it <em>must not be interrupted</em>.</p>\n"
                                                                     "<p>You can:</p><ul>"
                                                                     "<li>Migrate now (be prepared to wait)</li>"
                                                                     "<li>Skip the migration and start with fresh data and configuration</li>"
                                                                     "<li>Cancel and exit KMail2.</li>"
                                                                     "</ul>"
                                                                     "<p><a href=\"http://userbase.kde.org/Akonadi\">More Information...</a></p>"
                                                                     ), i18n( "KMail Migration" ), KGuiItem(i18n( "Migrate Now" )), KGuiItem(i18n( "Skip Migration" )), KStandardGuiItem::cancel(),
                                                                 QString(), KMessageBox::Notify | KMessageBox::Dangerous | KMessageBox::AllowLink );
            if ( choice == KMessageBox::Cancel )
                exit( 1 );

            if ( choice != KMessageBox::Yes ) {  // user skipped migration
                // we only will make one attempt at this
                migrationCfg.writeEntry( "Version", targetVersion );
                migrationCfg.sync();

                return;
            }

            kDebug() << "Performing Akonadi migration. Good luck!";
            KProcess proc;
            QStringList args = QStringList() << QLatin1String("--interactive-on-change");
            const QString path = KStandardDirs::findExe( QLatin1String("kmail-migrator" ) );
            proc.setProgram( path, args );
            proc.start();
            bool result = proc.waitForStarted();
            if ( result ) {
                result = proc.waitForFinished( -1 );
            }
            if ( result && proc.exitCode() == 0 ) {
                kDebug() << "Akonadi migration has been successful";
            } else {
                // exit code 1 means it is already running, so we are probably called by a migrator instance
                kError() << "Akonadi migration failed!";
                kError() << "command was: " << proc.program();
                kError() << "exit code: " << proc.exitCode();
                kError() << "stdout: " << proc.readAllStandardOutput();
                kError() << "stderr: " << proc.readAllStandardError();

                KMessageBox::error( 0, i18n("Migration to KMail 2 failed. In case you want to try again, run 'kmail-migrator --interactive' manually."),
                                    i18n( "Migration Failed" ) );
                return;
            }
        }
    } else {
        if (migrationCfg.hasKey("Enabled") && (migrationCfg.readEntry("Enabled", false) == false)) {
            return;
        }
        migrationCfg.writeEntry( "Enabled", false );
        migrationCfg.sync();
    }
}