/****************************************************************************
**
** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the $MODULE$ of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

// This flag changes the implementation to use S60 CDcoumentHandler
// instead of apparch when opening the files
#undef USE_DOCUMENTHANDLER

#include <qcoreapplication.h>
#include <qdir.h>
#include <qurl.h>
#include <private/qcore_symbian_p.h>

#include <miutset.h>                // KUidMsgTypeSMTP
#include <txtrich.h>                // CRichText
#include <f32file.h>                // TDriveUnit etc
#include <eikenv.h>                 // CEikonEnv
#include <apgcli.h>                 // RApaLsSession
#include <apgtask.h>                // TApaTaskList, TApaTask
#include <rsendas.h>                // RSendAs
#include <rsendasmessage.h>         // RSendAsMessage

#ifdef Q_WS_S60
#  include <pathinfo.h>               // PathInfo
#  ifdef USE_DOCUMENTHANDLER
#    include <documenthandler.h>        // CDocumentHandler
#  endif
#elif defined(USE_DOCUMENTHANDLER)
#  error CDocumentHandler requires support for S60
#endif

QT_BEGIN_NAMESPACE

_LIT(KSysBin, "\\Sys\\Bin\\");
_LIT(KTempDir, "\\System\\Temp\\");
_LIT(KBrowserPrefix, "4 " );
_LIT(KFontsDir, "z:\\resource\\Fonts\\");
const TUid KUidBrowser = { 0x10008D39 };

template<class R>
class QAutoClose
{
public:
    QAutoClose(R& aObj) : mPtr(&aObj) {}
    ~QAutoClose()
    {
        if (mPtr)
            mPtr->Close();
    }
    void Forget()
    {
        mPtr = 0;
    }
private:
    QAutoClose(const QAutoClose&);
    QAutoClose& operator=(const QAutoClose&);
private:
    R* mPtr;
};

static void handleMailtoSchemeLX(const QUrl &url)
{
    // this function has many intermingled leaves and throws. Qt and Symbian objects do not have
    // destructor dependencies, and cleanup object is used to prevent cleanup stack dependency on stack.
    QString recipient = url.path();
    QString subject = url.queryItemValue("subject");
    QString body = url.queryItemValue("body");
    QString to = url.queryItemValue("to");
    QString cc = url.queryItemValue("cc");
    QString bcc = url.queryItemValue("bcc");

    // these fields might have comma separated addresses
    QStringList recipients = recipient.split(",", QString::SkipEmptyParts);
    QStringList tos = to.split(",", QString::SkipEmptyParts);
    QStringList ccs = cc.split(",", QString::SkipEmptyParts);
    QStringList bccs = bcc.split(",", QString::SkipEmptyParts);


    RSendAs sendAs;
    User::LeaveIfError(sendAs.Connect());
    QAutoClose<RSendAs> sendAsCleanup(sendAs);


    CSendAsAccounts* accounts = CSendAsAccounts::NewL();
    CleanupStack::PushL(accounts);
    sendAs.AvailableAccountsL(KUidMsgTypeSMTP, *accounts);
    TInt count = accounts->Count();
    CleanupStack::PopAndDestroy(accounts);

    if(!count) {
        // TODO: we should try to create account if count == 0
        // CSendUi would provide account creation service for us, but it requires ridicilous
        // capabilities: LocalServices NetworkServices ReadDeviceData ReadUserData WriteDeviceData WriteUserData
        User::Leave(KErrNotSupported);
    } else {
        RSendAsMessage sendAsMessage;
        sendAsMessage.CreateL(sendAs, KUidMsgTypeSMTP);
        QAutoClose<RSendAsMessage> sendAsMessageCleanup(sendAsMessage);


        // Subject
        sendAsMessage.SetSubjectL(qt_QString2TPtrC(subject));

        // Body
        sendAsMessage.SetBodyTextL(qt_QString2TPtrC(body));

        // To
        foreach(QString item, recipients)
         sendAsMessage.AddRecipientL(qt_QString2TPtrC(item), RSendAsMessage::ESendAsRecipientTo );

        foreach(QString item, tos)
         sendAsMessage.AddRecipientL(qt_QString2TPtrC(item), RSendAsMessage::ESendAsRecipientTo );

        // Cc
        foreach(QString item, ccs)
         sendAsMessage.AddRecipientL(qt_QString2TPtrC(item), RSendAsMessage::ESendAsRecipientCc );

        // Bcc
        foreach(QString item, bccs)
         sendAsMessage.AddRecipientL(qt_QString2TPtrC(item), RSendAsMessage::ESendAsRecipientBcc );

        // send the message
        sendAsMessage.LaunchEditorAndCloseL();
        // sendAsMessage is already closed
        sendAsMessageCleanup.Forget();
    }
}

static bool handleMailtoScheme(const QUrl &url)
{
    TRAPD(err, QT_TRYCATCH_LEAVING(handleMailtoSchemeLX(url)));
    return err ? false : true;
}

static void handleOtherSchemesL(const TDesC& aUrl)
{
    // Other schemes are at the moment passed to WEB browser
    HBufC* buf16 = HBufC::NewLC( aUrl.Length() + KBrowserPrefix.iTypeLength );
    buf16->Des().Copy( KBrowserPrefix ); // Prefix used to launch correct browser view
    buf16->Des().Append( aUrl );

    TApaTaskList taskList( CEikonEnv::Static()->WsSession() );
    TApaTask task = taskList.FindApp( KUidBrowser );
    if ( task.Exists() )
        {
        // Switch to existing browser instance
        HBufC8* param8 = HBufC8::NewLC( buf16->Length() );
        param8->Des().Append( buf16->Des() );
        task.SendMessage( TUid::Uid( 0 ), *param8 ); // Uid is not used
        CleanupStack::PopAndDestroy( param8 );
        }
    else
        {
        // Start a new browser instance
        RApaLsSession appArcSession;
        User::LeaveIfError( appArcSession.Connect() );
        CleanupClosePushL<RApaLsSession>( appArcSession );
        TThreadId id;
        appArcSession.StartDocument( *buf16, KUidBrowser , id );
        CleanupStack::PopAndDestroy(); // appArcSession
        }

    CleanupStack::PopAndDestroy( buf16 );
}

static bool handleOtherSchemes(const QUrl &url)
{
    QString encUrl(url.toEncoded());
    TPtrC urlPtr(qt_QString2TPtrC(encUrl));
    TRAPD( err, handleOtherSchemesL(urlPtr));
    return err ? false : true;
}

static TDriveUnit exeDrive()
{
    RProcess me;
    TFileName processFileName = me.FileName();
    TDriveUnit drive(processFileName);
    return drive;
}

static TDriveUnit writableExeDrive()
{
    TDriveUnit drive = exeDrive();
    if( drive.operator TInt() == EDriveZ )
        return TDriveUnit( EDriveC );
    return drive;
}

static TPtrC writableDataRoot()
{
    TDriveUnit drive = exeDrive();
#ifdef Q_WS_S60
    switch( drive.operator TInt() ){
        case EDriveC:
            return PathInfo::PhoneMemoryRootPath();
            break;
        case EDriveE:
            return PathInfo::MemoryCardRootPath();
            break;
        case EDriveZ:
            // It is not possible to write on ROM drive ->
            // return phone mem root path instead
            return PathInfo::PhoneMemoryRootPath();
            break;
        default:
            // TODO: Should we return drive root similar to MemoryCardRootPath
            return PathInfo::PhoneMemoryRootPath();
            break;
    }
#else
#warning No fallback implementation of writableDataRoot()
    return 0;
#endif
}

static void openDocumentL(const TDesC& aUrl)
{
#ifndef USE_DOCUMENTHANDLER
    // Start app associated to file MIME type by using RApaLsSession
    // Apparc base method cannot be used to open app in embedded mode,
    // but seems to be most stable way at the moment
    RApaLsSession appArcSession;
    User::LeaveIfError( appArcSession.Connect() );
    CleanupClosePushL<RApaLsSession>( appArcSession );
    TThreadId id;
    // ESwitchFiles means do not start another instance
    // Leaves if file does not exist, leave is trapped in openDocument and false returned to user.
    User::LeaveIfError( appArcSession.StartDocument( aUrl, id,
            RApaLsSession::ESwitchFiles ) ); // ELaunchNewApp
    CleanupStack::PopAndDestroy(); // appArcSession
#else
    // This is an alternative way to launch app associated to MIME type
    // CDocumentHandler would support opening apps in embedded mode,
    // but our Qt application window group seems to always get switched on top of embedded one
    // -> Cannot use menus etc of embedded app -> used

    CDocumentHandler* docHandler = CDocumentHandler::NewLC();
    TDataType temp;
    //Standalone file opening fails for some file-types at least in S60 3.1 emulator
    //For example .txt file fails with KErrAlreadyInUse and music files with KERN-EXEC 0
    //Workaround is to use OpenFileEmbeddedL
    //docHandler->OpenFileL(aUrl, temp);

    // Opening file with CDocumentHandler will leave if file does not exist
    // Leave is trapped in openDocument and false returned to user.
    docHandler->OpenFileEmbeddedL(aUrl, temp);
    CleanupStack::PopAndDestroy(docHandler);
#endif
}

#ifdef USE_SCHEMEHANDLER
// The schemehandler component only exist in private SDK. This implementation
// exist here just for convenience in case that we need to use it later on
// The schemehandle based implementation is not yet tested.

// The biggest advantage of schemehandler is that it can handle
// wide range of schemes and is extensible by plugins
static bool handleUrl(const QUrl &url)
{
    if (!url.isValid())
        return false;

    QString urlString(url.toString());
    TPtrC urlPtr(qt_QString2TPtrC(urlString));
    TRAPD( err, handleUrlL(urlPtr));
    return err ? false : true;
}

static void handleUrlL(const TDesC& aUrl)
{
    CSchemeHandler* schemeHandler = CSchemeHandler::NewL( aUrl );
    CleanupStack::PushL( schemeHandler );
    schemeHandler->HandleUrlStandaloneL(); // Process the Url in standalone mode
    CleanupStack::PopAndDestroy();
}
static bool launchWebBrowser(const QUrl &url)
{
    return handleUrl(url);
}

static bool openDocument(const QUrl &file)
{
    return handleUrl(url);
}
#endif

static bool launchWebBrowser(const QUrl &url)
{
    if (!url.isValid())
        return false;

    if (url.scheme() == QLatin1String("mailto")) {
        return handleMailtoScheme(url);
    }
    return handleOtherSchemes( url );
}

static bool openDocument(const QUrl &file)
{
    if (!file.isValid())
        return false;

    QString filePath = file.toLocalFile();
    filePath = QDir::toNativeSeparators(filePath);
    TPtrC filePathPtr(qt_QString2TPtrC(filePath));
    TRAPD(err, openDocumentL(filePathPtr));
    return err ? false : true;
}

QString QDesktopServices::storageLocation(StandardLocation type)
{
    TFileName path;

    switch (type) {
    case DesktopLocation:
        qWarning("QDesktopServices::storageLocation %d not implemented", type);
        break;
    case DocumentsLocation:
        path.Append(writableDataRoot());
        break;
    case FontsLocation:
        path.Append(KFontsDir);
        break;
    case ApplicationsLocation:
        path.Append(exeDrive().Name());
        path.Append(KSysBin);
        break;
    case MusicLocation:
        path.Append(writableDataRoot());
#ifdef Q_WS_S60
        path.Append(PathInfo::SoundsPath());
#endif
        break;
    case MoviesLocation:
        path.Append(writableDataRoot());
#ifdef Q_WS_S60
        path.Append(PathInfo::VideosPath());
#endif
        break;
    case PicturesLocation:
        path.Append(writableDataRoot());
#ifdef Q_WS_S60
        path.Append(PathInfo::ImagesPath());
#endif
        break;
    case TempLocation:
        path.Append(writableExeDrive().Name());
        path.Append(KTempDir);
        //return QDir::tempPath(); break;
        break;
    case HomeLocation:
        path.Append(writableDataRoot());
        //return QDir::homePath(); break;
        break;
    case DataLocation:
        CEikonEnv::Static()->FsSession().PrivatePath( path );
        // TODO: Should we actually return phone mem if data is on ROM?
        path.Insert( 0, exeDrive().Name() );
        break;
    default:
        break;
    }

    // Convert to cross-platform format and clean the path
    QString nativePath = QString::fromUtf16(path.Ptr(), path.Length());
    QString qtPath = QDir::fromNativeSeparators(nativePath);
    qtPath = QDir::cleanPath(qtPath);

    // Note: The storage location returned can be a directory that does not exist;
    // i.e., it may need to be created by the system or the user.
    return  qtPath;
}

typedef QString (*LocalizerFunc)(QString&);

static QString defaultLocalizedDirectoryName(QString&)
{
    return QString();
}

QString QDesktopServices::displayName(StandardLocation type)
{
    static LocalizerFunc ptrLocalizerFunc = NULL;

    if (!ptrLocalizerFunc) {
        ptrLocalizerFunc = reinterpret_cast<LocalizerFunc>
            (qt_resolveS60PluginFunc(S60Plugin_LocalizedDirectoryName));
        if (!ptrLocalizerFunc)
            ptrLocalizerFunc = &defaultLocalizedDirectoryName;
    }

    QString rawPath = storageLocation(type);
    return ptrLocalizerFunc(rawPath);
}


QT_END_NAMESPACE