/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, version 2.1 of the License.

* 

* 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 Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with this program.  If not, 

* see "http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html/".

*

* Description:

*

*/

#include <xqservicerequest.h>

#include <xqservicemanager.h>

#include <QList>

#include "xqservicelog.h"

#include "xqaiwutils.h"

#include "xqaiwuridriver.h"

#include "xqaiwdecl.h"

#include "xqappmgr_p.h"

XQApplicationManagerPrivate::XQApplicationManagerPrivate():

   serviceMgr(0),

   aiwUtilities(0)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate");

}

XQApplicationManagerPrivate::~XQApplicationManagerPrivate()

{

    XQSERVICE_DEBUG_PRINT("~XQApplicationManagerPrivate");

    delete serviceMgr;

    delete aiwUtilities;

}

XQAiwRequest* XQApplicationManagerPrivate::create( const QString &interface, const QString &operation, bool embedded)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create(interface)");

    return create("", interface, operation, embedded);

}

XQAiwRequest* XQApplicationManagerPrivate::create(

    const QString &service, const QString &interface, const QString &operation, bool embedded)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create(service+interface)");

    if (!serviceMgr)

        serviceMgr = new XQServiceManager();

    if (!serviceMgr)

    {

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Can not create service manager");

        return 0;

    }

    QList<XQAiwInterfaceDescriptor> impls;

    if (service.isEmpty())

        impls = serviceMgr->findInterfaces(interface);

    else

        impls = serviceMgr->findInterfaces(service, interface);

    // Pick up the first implementation

    if (impls.count())

    {

        return new XQAiwRequest(impls[0], operation, embedded);

    }

    return 0;

}

XQAiwRequest* XQApplicationManagerPrivate::create(

    const XQAiwInterfaceDescriptor &implementation, const QString &operation, bool embedded)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create (impl)");

    return new XQAiwRequest(implementation, operation, embedded);

}

XQAiwRequest* XQApplicationManagerPrivate::create(

    const QUrl &uri, const XQAiwInterfaceDescriptor *implementation, bool embedded)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create (uri)");

    XQSERVICE_DEBUG_PRINT("uri=%s", qPrintable(uri.toString()));

    if (!uri.isValid())

    {

        XQSERVICE_CRITICAL_PRINT("Invalid URI %s", qPrintable(uri.toString()));

        return 0;

    }

    if (hasCustomHandler(uri))

    {

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::custom handler applied");

        XQAiwInterfaceDescriptor nullDescr;

        return new XQAiwRequest(uri, nullDescr, XQOP_URI_VIEW);

    }

    const XQAiwInterfaceDescriptor *impl = implementation;

    QList<XQAiwInterfaceDescriptor> impls;

    if (impl == 0) 

    {

        // Implementation not given, find first one        

        impls = list(uri);

        if (impls.count())

        {

            impl = &impls[0];

            XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create (impl) use first)");

        }

    }

    XQAiwRequest *req = 0;

    if (impl != 0)

    {

        // Create service request for viewing the URI

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create (impl) creating request)");

        req = new XQAiwRequest(uri, *impl, XQOP_URI_VIEW);

        if (req)

        {

            req->setEmbedded(embedded);

        }

    }

    return req;

}

XQAiwRequest* XQApplicationManagerPrivate::create(

     const QFile &file, const XQAiwInterfaceDescriptor *implementation, bool embedded)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create(file)");

    XQSERVICE_DEBUG_PRINT("file=%s", qPrintable(file.fileName()));

    const XQAiwInterfaceDescriptor *impl = implementation;

    QList<XQAiwInterfaceDescriptor> impls;

    if (impl == 0) 

    {

        // Implementation not given, find services capable of handling the "file"

        impls = list(file);

        if (impls.count())

        {

            impl = &impls[0];

        }

    }

    XQAiwRequest * req = 0;

    if (impl != 0)

    {

        QVariant v = impl->property(XQAiwInterfaceDescriptor::ImplementationId);

        req = new XQAiwRequest(file, *impl, XQOP_FILE_VIEW);

        if (req)

        {

            req->setEmbedded(embedded);

            XQSERVICE_DEBUG_PRINT("File handled by %x", v.toInt());

        }

    }

    return req;

}

XQAiwRequest* XQApplicationManagerPrivate::create(

    const XQSharableFile &file, const XQAiwInterfaceDescriptor *implementation, bool embedded)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::create(XQSharableFile)");

    if (!file.isValid())

    {

        XQSERVICE_DEBUG_PRINT("\tInvalid XQSharableFile)");

        return 0;

    }

    const XQAiwInterfaceDescriptor *impl = implementation;

    QList<XQAiwInterfaceDescriptor> impls;

    if (impl == 0) 

    {

        // Implementation not given, find services capable of handling the "file"

        impls = list(file);

        if (impls.count())

        {

            impl = &impls[0];

        }

    }

    XQAiwRequest * req = 0;

    if (impl != 0)

    {

        QVariant v = impl->property(XQAiwInterfaceDescriptor::ImplementationId);

        req = new XQAiwRequest(file, *impl, XQOP_FILE_VIEW_SHARABLE);

        if (req)

        {

            req->setEmbedded(embedded);

            XQSERVICE_DEBUG_PRINT("File handled by %x", v.toInt());

        }

    }

    return req;

}

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::list(

    const QString &interface, const QString& operation)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::list(interface)");

    Q_UNUSED(operation);

    if (!serviceMgr)

        serviceMgr = new XQServiceManager();

    QList<XQAiwInterfaceDescriptor> result;    

    if (!serviceMgr)

    {

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Can not create service manager");

        return result;

    }

    return serviceMgr->findInterfaces(interface);

}

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::list(

    const QString &service, const QString& interface, const QString& operation)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::list (service+interface)");

    Q_UNUSED(operation);

    if (!serviceMgr)

        serviceMgr = new XQServiceManager();

    QList<XQAiwInterfaceDescriptor> result;    

    if (!serviceMgr)

    {

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Can not create service manager");

        return result;

    }

    return serviceMgr->findInterfaces(service, interface);

}

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::list(

    const QUrl &uri)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::list (uri) %s", qPrintable(uri.toString()));

    QList<XQAiwInterfaceDescriptor> result;

    if (!uri.isValid())

    {

        XQSERVICE_CRITICAL_PRINT("Invalid URI %s", qPrintable(uri.toString()));

        return result; // Empty

    }

    QString scheme = uri.scheme();

    if (scheme.compare(XQURI_SCHEME_FILE,Qt::CaseInsensitive) == 0)

    {

        QFile file (uri.toLocalFile());

        return list(file);  // Apply file based listing

    }

    //  Find all services implementing URI interface and support URI scheme

    QList<XQAiwInterfaceDescriptor> uriHandlers;

    uriHandlers = list(XQI_URI_VIEW, "");

    // Pick up services supporting the required scheme

    foreach (XQAiwInterfaceDescriptor uh, uriHandlers)

    {

        //  Find services that support the scheme

        if (uh.customProperty(XQCUSTOM_PROP_SCHEMES).contains(scheme,Qt::CaseInsensitive))  // Allow multiple schemes in same string

        {

            XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Service %s can handle scheme %s",

                                  qPrintable(uh.serviceName()), qPrintable(scheme))

            result.append(uh);

        }

    }

    return result;

}

//

// List services capable of handling the file by MIME type

//

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::list(const QFile &file)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::list (file) %s", qPrintable(file.fileName()));

    // List first MIME handlers for file

    QList<XQAiwInterfaceDescriptor> mimeHandlers;

    mimeHandlers = listMimeHandlers(file);

    // Then list those file services that can support the MIME type

    return listFileHandlers(mimeHandlers);

}

//

// List services capable of handling the sharable file by MIME type

//

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::list(const XQSharableFile &file)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::list (handle)");

    // List first MIME handlers for the sharable file

    QList<XQAiwInterfaceDescriptor> mimeHandlers;

    if (!file.isValid())

    {

        return mimeHandlers; // Empty set

    }

    mimeHandlers = listMimeHandlers(file);

    // Then list those file services that can support the MIME type

    return listFileHandlers(mimeHandlers);

}

int XQApplicationManagerPrivate::lastError() const

{

    int err=0;

    if (serviceMgr)

        err = serviceMgr->latestError();

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: lastError=%d", err);

    return err;

}

// ---- PRIVATE FUNCTIONS ----

bool XQApplicationManagerPrivate::hasCustomHandler(const QUrl &uri) const

{

    return XQAiwUriDriver::hasCustomHandler(uri);

}

//

// Get file handlers

// TODO: Currently only one, default handler is returned !!!

//       Possibly later all handlers need to be returned.

//

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::listMimeHandlers(const QFile &file)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::listMimeHandlers %s", qPrintable(file.fileName()));

    QList<XQAiwInterfaceDescriptor> mimeHandlers;

    if (aiwUtilities == 0)

        aiwUtilities = new XQAiwUtils();

    if (aiwUtilities == 0)

    {

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Can not create aiw utils");

        return mimeHandlers;

    }

    XQAiwInterfaceDescriptor descriptor;

    // Find default application that can handle MIME type (only one at the moment)

    int applicationId = 0;

    if (aiwUtilities->findApplication(file, applicationId) != XQService::ENoError)

    {

        return mimeHandlers;  // Empty set

    }

    // Set incomplete descriptor

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Found file handler %x", applicationId);

    descriptor.setProperty(XQAiwInterfaceDescriptor::ImplementationId, QVariant(applicationId));

    mimeHandlers.append(descriptor);

    return mimeHandlers;

}

//

// Get handlers for sharable file

// TODO: Currently only one, default handler is returned !!!

//       Possibly later all handlers need to be returned.

//

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::listMimeHandlers(const XQSharableFile &file)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::listMimeHandlers (handle)");

    QList<XQAiwInterfaceDescriptor> mimeHandlers;

    if (aiwUtilities == 0)

        aiwUtilities = new XQAiwUtils();

    if (aiwUtilities == 0)

    {

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Can not create aiw utils");

        return mimeHandlers;

    }

    XQAiwInterfaceDescriptor descriptor;

    // Find default application that can handle MIME type (only one at the moment)

    int applicationId = 0;

    if (aiwUtilities->findApplication(file, applicationId) != XQService::ENoError)

    {

        return mimeHandlers;  // Empty set

    }

    // Set incomplete descriptor

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Found file handler %x", applicationId);

    descriptor.setProperty(XQAiwInterfaceDescriptor::ImplementationId, QVariant(applicationId));

    mimeHandlers.append(descriptor);

    return mimeHandlers;

}

// To be called only for URI having scheme XQURI_SCHEME_ACTIVITY

// Check that application exists and fill in only the implementationId

bool XQApplicationManagerPrivate::getAppDescriptor(const QUrl &uri,  XQAiwInterfaceDescriptor *descriptor)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::getAppDescriptor %s)", qPrintable(uri.toString()));

    if (aiwUtilities == 0)

        aiwUtilities = new XQAiwUtils();

    if (aiwUtilities == 0)

    {

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Can not create aiw utils");

        return false;

    }

    int applicationId = 0;

    if (aiwUtilities->findApplication(uri, applicationId) != XQService::ENoError)

    {

        return false;  // No application registered for file

    }

    // Create incomplete descriptor

    descriptor->setProperty(XQAiwInterfaceDescriptor::ImplementationId, QVariant(applicationId));

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Found uri handler %x", applicationId);

    return  true; 

}

//

// Get file handlers that can support the give MIME type

//

QList<XQAiwInterfaceDescriptor> XQApplicationManagerPrivate::listFileHandlers(

    const QList<XQAiwInterfaceDescriptor> &mimeHandlers)

{

    XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate::listFileHandlers");

    //  Find all services implementing URI interface, support "file" scheme and can handle the file

    //  by MIME type

    QList<XQAiwInterfaceDescriptor> fileServices;

    fileServices = list(XQI_FILE_VIEW, "");

    if (fileServices.count() == 0)

    {

        return fileServices; // Empty set

    }

    QList<XQAiwInterfaceDescriptor> result;

    foreach (XQAiwInterfaceDescriptor fs, fileServices)

    {

        //  Find services that support the file scheme

        XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Service %s can handle file", qPrintable(fs.serviceName()));

        int serviceAppId = fs.property(XQAiwInterfaceDescriptor::ImplementationId).toInt();

        foreach (XQAiwInterfaceDescriptor mh, mimeHandlers)

        {

            int mimeAppId = mh.property(XQAiwInterfaceDescriptor::ImplementationId).toInt();

            if (mimeAppId == serviceAppId)

            {

                // Return only those services that support file scheme and claim to support also MIME type

                XQSERVICE_DEBUG_PRINT("XQApplicationManagerPrivate:: Service %s (UID=%x) can handle file and MIME type",

                                      qPrintable(fs.serviceName()), serviceAppId);

                result.append(fs);

            }

        }

    }

    return result;

}