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#include <QtGui>

#include <qservicemanager.h>

#include <qserviceinterfacedescriptor.h>

#include "servicebrowser.h"

Q_DECLARE_METATYPE(QServiceInterfaceDescriptor)

ServiceBrowser::ServiceBrowser(QWidget *parent, Qt::WindowFlags flags)

    : QWidget(parent, flags)

{

    serviceManager = new QServiceManager(this);

    registerExampleServices();

    initWidgets();

    reloadServicesList();

    setWindowTitle(tr("Services Browser"));

}

ServiceBrowser::~ServiceBrowser()

{

    unregisterExampleServices();

}

void ServiceBrowser::currentInterfaceImplChanged(QListWidgetItem *current, QListWidgetItem *previous)

{

    Q_UNUSED(previous);

    if (!current)

        return;

    reloadAttributesList();

    reloadAttributesRadioButtonText();

    QServiceInterfaceDescriptor descriptor = current->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();

    if (descriptor.isValid()) {

        defaultInterfaceButton->setText(tr("Set as default implementation for %1") 

                .arg(descriptor.interfaceName()));

        defaultInterfaceButton->setEnabled(true);

    }

}

void ServiceBrowser::reloadServicesList()

{

    servicesListWidget->clear();

    QStringList services = serviceManager->findServices();

    for (int i=0; i<services.count(); i++)

        servicesListWidget->addItem(services[i]);

    servicesListWidget->addItem(showAllServicesItem);

}

void ServiceBrowser::reloadInterfaceImplementationsList()

{

    QString serviceName;

    if (servicesListWidget->currentItem()

            && servicesListWidget->currentItem() != showAllServicesItem) {

        serviceName = servicesListWidget->currentItem()->text();

        interfacesGroup->setTitle(tr("Interfaces implemented by %1").arg(serviceName));

    } else {

        interfacesGroup->setTitle(tr("All interface implementations"));

    }

    QList<QServiceInterfaceDescriptor> descriptors = serviceManager->findInterfaces(serviceName);

    attributesListWidget->clear();

    interfacesListWidget->clear();

    for (int i=0; i<descriptors.count(); i++) {

        QString text = QString("%1 %2.%3")

                .arg(descriptors[i].interfaceName())

                .arg(descriptors[i].majorVersion())

                .arg(descriptors[i].minorVersion());

        if (serviceName.isEmpty())

            text += " (" + descriptors[i].serviceName() + ")";

        QServiceInterfaceDescriptor defaultInterfaceImpl = 

                serviceManager->interfaceDefault(descriptors[i].interfaceName());

        if (descriptors[i] == defaultInterfaceImpl)

            text += tr(" (default)");

        QListWidgetItem *item = new QListWidgetItem(text);

        item->setData(Qt::UserRole, qVariantFromValue(descriptors[i]));

        interfacesListWidget->addItem(item);

    }

    defaultInterfaceButton->setEnabled(false);

}

void ServiceBrowser::reloadAttributesList()

{

    QListWidgetItem *item = interfacesListWidget->currentItem();

    if (!item)

        return;

    QServiceInterfaceDescriptor selectedImpl =

            item->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();

    QObject *implementationRef;

    if (selectedImplRadioButton->isChecked())

        implementationRef = serviceManager->loadInterface(selectedImpl, 0, 0);

    else

        implementationRef = serviceManager->loadInterface(selectedImpl.interfaceName(), 0, 0);

    attributesListWidget->clear();

    if (!implementationRef) {

        attributesListWidget->addItem(tr("(Error loading service plugin)"));

        return;

    }

    const QMetaObject *metaObject = implementationRef->metaObject();

    attributesGroup->setTitle(tr("Invokable attributes for %1 class")

            .arg(QString(metaObject->className())));

    for (int i=0; i<metaObject->methodCount(); i++) {

        QMetaMethod method = metaObject->method(i);

        attributesListWidget->addItem("[METHOD] " + QString(method.signature()));

    }

    for (int i=0; i<metaObject->propertyCount(); i++) {

        QMetaProperty property = metaObject->property(i);

        attributesListWidget->addItem("[PROPERTY] " + QString(property.name()));

    }

}

void ServiceBrowser::setDefaultInterfaceImplementation()

{

    QListWidgetItem *item = interfacesListWidget->currentItem();

    if (!item)

        return;

    QServiceInterfaceDescriptor descriptor = item->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();

    if (descriptor.isValid()) {

        if (serviceManager->setInterfaceDefault(descriptor)) {

            int currentIndex = interfacesListWidget->row(item);

            reloadInterfaceImplementationsList();

            interfacesListWidget->setCurrentRow(currentIndex);

        } else {

            qWarning() << "Unable to set default service for interface:" 

                    << descriptor.interfaceName();

        }

    }

}

void ServiceBrowser::registerExampleServices()

{

    QStringList exampleXmlFiles;

    exampleXmlFiles << "filemanagerservice.xml" << "bluetoothtransferservice.xml";

    foreach (const QString &fileName, exampleXmlFiles) {

        QString path = QCoreApplication::applicationDirPath() + "/xmldata/" + fileName;

        serviceManager->addService(path);

    }

}

void ServiceBrowser::unregisterExampleServices()

{

    serviceManager->removeService("FileManagerService");

    serviceManager->removeService("BluetoothTransferService");

}

void ServiceBrowser::reloadAttributesRadioButtonText()

{

    QListWidgetItem *item = interfacesListWidget->currentItem();

    if (!item)

        return;

    QServiceInterfaceDescriptor selectedImpl =

            item->data(Qt::UserRole).value<QServiceInterfaceDescriptor>();

    QServiceInterfaceDescriptor defaultImpl = 

            serviceManager->interfaceDefault(selectedImpl.interfaceName());

    defaultImplRadioButton->setText(tr("Default implementation for %1\n(currently provided by %2)")

            .arg(defaultImpl.interfaceName())

            .arg(defaultImpl.serviceName()));

}

void ServiceBrowser::initWidgets()

{

    showAllServicesItem = new QListWidgetItem(tr("(All registered services)"));

    servicesListWidget = new QListWidget;

    interfacesListWidget = new QListWidget;

    interfacesListWidget->addItem(tr("(Select a service)"));

    attributesListWidget = new QListWidget;

    attributesListWidget->addItem(tr("(Select an interface implementation)"));

#ifndef Q_OS_SYMBIAN

    interfacesListWidget->setMinimumWidth(450);

#endif

    connect(servicesListWidget, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),

            this, SLOT(reloadInterfaceImplementationsList()));

    connect(interfacesListWidget, SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),

            this, SLOT(currentInterfaceImplChanged(QListWidgetItem*,QListWidgetItem*)));

    defaultInterfaceButton = new QPushButton(tr("Set as default implementation"));

    defaultInterfaceButton->setEnabled(false);

    connect(defaultInterfaceButton, SIGNAL(clicked()),

            this, SLOT(setDefaultInterfaceImplementation()));

    selectedImplRadioButton = new QRadioButton(tr("Selected interface implementation"));

    defaultImplRadioButton = new QRadioButton(tr("Default implementation"));

    selectedImplRadioButton->setChecked(true);

    QButtonGroup *radioButtons = new QButtonGroup(this);

    radioButtons->addButton(selectedImplRadioButton);

    radioButtons->addButton(defaultImplRadioButton);

    connect(radioButtons, SIGNAL(buttonClicked(QAbstractButton*)),

            this, SLOT(reloadAttributesList()));

    QGroupBox *servicesGroup = new QGroupBox(tr("Show services for:"));

    QVBoxLayout *servicesLayout = new QVBoxLayout;

    servicesLayout->addWidget(servicesListWidget);

    servicesGroup->setLayout(servicesLayout);

    interfacesGroup = new QGroupBox(tr("Interface implementations"));

    QVBoxLayout *interfacesLayout = new QVBoxLayout;

    interfacesLayout->addWidget(interfacesListWidget);

    interfacesLayout->addWidget(defaultInterfaceButton);

    interfacesGroup->setLayout(interfacesLayout);

    attributesGroup = new QGroupBox(tr("Invokable attributes"));

    QVBoxLayout *attributesLayout = new QVBoxLayout;

    attributesLayout->addWidget(attributesListWidget);

    attributesLayout->addWidget(new QLabel(tr("Show attributes for:")));

    attributesLayout->addWidget(selectedImplRadioButton);

    attributesLayout->addWidget(defaultImplRadioButton);

    attributesGroup->setLayout(attributesLayout);

#ifndef Q_OS_SYMBIAN

    QGridLayout *layout = new QGridLayout;

    layout->addWidget(servicesGroup, 0, 0);

    layout->addWidget(attributesGroup, 0, 1, 2, 1);

    layout->addWidget(interfacesGroup, 1, 0);

#else

    QVBoxLayout *layout = new QVBoxLayout;    

    QStackedLayout *stackedLayout = new QStackedLayout;

    stackedLayout->addWidget(servicesGroup);

    stackedLayout->addWidget(interfacesGroup);

    stackedLayout->addWidget(attributesGroup);

    QComboBox *pageComboBox = new QComboBox;

    pageComboBox->addItem(tr("Services"));

    pageComboBox->addItem(tr("Interfaces"));

    pageComboBox->addItem(tr("Attributes"));

    connect(pageComboBox, SIGNAL(activated(int)),

            stackedLayout, SLOT(setCurrentIndex(int)));

    layout->addWidget(pageComboBox);

    layout->addLayout(stackedLayout);

#endif

    setLayout(layout);

}