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#include "connectdialog_p.h"

#include "signalslot_utils_p.h"

#include <signalslotdialog_p.h>

#include <metadatabase_p.h>

#include <QtDesigner/QDesignerFormWindowInterface>

#include <QtDesigner/QDesignerFormEditorInterface>

#include <QtDesigner/QDesignerWidgetDataBaseInterface>

#include <QtDesigner/QExtensionManager>

#include <QtDesigner/QDesignerLanguageExtension>

#include <QtGui/QPushButton>

QT_BEGIN_NAMESPACE

namespace {

    typedef QList<QListWidgetItem*> ListWidgetItems;

}

static QString realClassName(QDesignerFormEditorInterface *core, QWidget *widget)

{

    QString class_name = QLatin1String(widget->metaObject()->className());

    const QDesignerWidgetDataBaseInterface *wdb = core->widgetDataBase();

    const int idx = wdb->indexOfObject(widget);

    if (idx != -1)

        class_name = wdb->item(idx)->name();

    return class_name;

}

static QString widgetLabel(QDesignerFormEditorInterface *core, QWidget *widget)

{

    return QString::fromUtf8("%1 (%2)")

            .arg(qdesigner_internal::realObjectName(core, widget))

            .arg(realClassName(core, widget));

}

namespace qdesigner_internal {

ConnectDialog::ConnectDialog(QDesignerFormWindowInterface *formWindow,

                             QWidget *source, QWidget *destination,

                             QWidget *parent) :

    QDialog(parent),

    m_source(source),

    m_destination(destination),

    m_sourceMode(widgetMode(m_source, formWindow)),

    m_destinationMode(widgetMode(m_destination, formWindow)),

    m_formWindow(formWindow)

{

    m_ui.setupUi(this);

    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);

    connect(m_ui.signalList, SIGNAL(itemClicked(QListWidgetItem*)),

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

    connect(m_ui.slotList, SIGNAL(itemClicked(QListWidgetItem*)),

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

    m_ui.slotList->setEnabled(false);

    QPushButton *ok_button = okButton();

    ok_button->setDefault(true);

    ok_button->setEnabled(false);

    connect(m_ui.showAllCheckBox, SIGNAL(toggled(bool)), this, SLOT(populateLists()));

    QDesignerFormEditorInterface *core = m_formWindow->core();

    m_ui.signalGroupBox->setTitle(widgetLabel(core, source));

    m_ui.slotGroupBox->setTitle(widgetLabel(core, destination));

    m_ui.editSignalsButton->setEnabled(m_sourceMode != NormalWidget);

    connect(m_ui.editSignalsButton, SIGNAL(clicked()), this, SLOT(editSignals()));

    m_ui.editSlotsButton->setEnabled(m_destinationMode != NormalWidget);

    connect(m_ui.editSlotsButton,   SIGNAL(clicked()), this, SLOT(editSlots()));

    populateLists();

}

ConnectDialog::WidgetMode ConnectDialog::widgetMode(QWidget *w,  QDesignerFormWindowInterface *formWindow)

{

    QDesignerFormEditorInterface *core = formWindow->core();

    if (qt_extension<QDesignerLanguageExtension*>(core->extensionManager(), core))

        return NormalWidget;

    if (w == formWindow || formWindow->mainContainer() == w)

        return MainContainer;

    if (isPromoted(formWindow->core(), w))

        return PromotedWidget;

    return NormalWidget;

}

QPushButton *ConnectDialog::okButton()

{

    return m_ui.buttonBox->button(QDialogButtonBox::Ok);

}

void ConnectDialog::setOkButtonEnabled(bool e)

{

    okButton()->setEnabled(e);

}

void ConnectDialog::populateLists()

{

    populateSignalList();

}

void ConnectDialog::setSignalSlot(const QString &signal, const QString &slot)

{

    ListWidgetItems sigItems = m_ui.signalList->findItems(signal, Qt::MatchExactly);

    if (sigItems.empty()) {

        m_ui.showAllCheckBox->setChecked(true);

        sigItems = m_ui.signalList->findItems(signal, Qt::MatchExactly);

    }

    if (!sigItems.empty()) {

        selectSignal(sigItems.front());

        ListWidgetItems slotItems = m_ui.slotList->findItems(slot, Qt::MatchExactly);

        if (slotItems.empty()) {

            m_ui.showAllCheckBox->setChecked(true);

            slotItems = m_ui.slotList->findItems(slot, Qt::MatchExactly);

        }

        if (!slotItems.empty())

            selectSlot(slotItems.front());

    }

}

bool ConnectDialog::showAllSignalsSlots() const

{

    return m_ui.showAllCheckBox->isChecked();

}

void ConnectDialog::setShowAllSignalsSlots(bool showIt)

{

    m_ui.showAllCheckBox->setChecked(showIt);

}

void ConnectDialog::selectSignal(QListWidgetItem *item)

{

    if (item) {

        m_ui.signalList->setCurrentItem(item);

        populateSlotList(item->text());

        m_ui.slotList->setEnabled(true);

        setOkButtonEnabled(!m_ui.slotList->selectedItems().isEmpty());

    } else {

        m_ui.signalList->clearSelection();

        populateSlotList();

        m_ui.slotList->setEnabled(false);

        setOkButtonEnabled(false);

    }

}

void ConnectDialog::selectSlot(QListWidgetItem *item)

{

    if (item) {

        m_ui.slotList->setCurrentItem(item);

    } else {

        m_ui.slotList->clearSelection();

    }

    setOkButtonEnabled(true);

}

QString ConnectDialog::signal() const

{

    const ListWidgetItems item_list = m_ui.signalList->selectedItems();

    if (item_list.size() != 1)

        return QString();

    return item_list.at(0)->text();

}

QString ConnectDialog::slot() const

{

    const ListWidgetItems item_list = m_ui.slotList->selectedItems();

    if (item_list.size() != 1)

        return QString();

    return item_list.at(0)->text();

}

void ConnectDialog::populateSlotList(const QString &signal)

{

    QString selectedName;

    if (const QListWidgetItem * item = m_ui.slotList->currentItem())

        selectedName = item->text();

    m_ui.slotList->clear();

    QMap<QString, QString> memberToClassName = getMatchingSlots(m_formWindow->core(), m_destination, signal, showAllSignalsSlots());

    QFont font = QApplication::font();

    font.setItalic(true);

    QVariant variantFont = qVariantFromValue(font);

    QListWidgetItem *curr = 0;

    QMap<QString, QString>::ConstIterator itMember = memberToClassName.constBegin();

    const QMap<QString, QString>::ConstIterator itMemberEnd = memberToClassName.constEnd();

    while (itMember != itMemberEnd) {

        const QString member = itMember.key();

        const bool qt3Slot = isQt3Slot(m_formWindow->core(), m_destination, member);

        QListWidgetItem *item = new QListWidgetItem(m_ui.slotList);

        item->setText(member);

        if (member == selectedName)

            curr = item;

        if (qt3Slot) {

            item->setData(Qt::FontRole, variantFont);

            item->setData(Qt::ForegroundRole, Qt::red);

        }

        ++itMember;

    }

    if (curr)

        m_ui.slotList->setCurrentItem(curr);

    if (m_ui.slotList->selectedItems().isEmpty())

        setOkButtonEnabled(false);

}

void ConnectDialog::populateSignalList()

{

    QString selectedName;

    if (const QListWidgetItem *item = m_ui.signalList->currentItem())

        selectedName = item->text();

    m_ui.signalList->clear();

    QMap<QString, QString> memberToClassName = getSignals(m_formWindow->core(), m_source, showAllSignalsSlots());

    QFont font = QApplication::font();

    font.setItalic(true);

    QVariant variantFont = qVariantFromValue(font);

    QListWidgetItem *curr = 0;

    QMap<QString, QString>::ConstIterator itMember = memberToClassName.constBegin();

    const QMap<QString, QString>::ConstIterator itMemberEnd = memberToClassName.constEnd();

    while (itMember != itMemberEnd) {

        const QString member = itMember.key();

        const bool qt3Signal = isQt3Signal(m_formWindow->core(), m_source, member);

        QListWidgetItem *item = new QListWidgetItem(m_ui.signalList);

        item->setText(member);

        if (!selectedName.isEmpty() && member == selectedName)

            curr = item;

        if (qt3Signal) {

            item->setData(Qt::FontRole, variantFont);

            item->setData(Qt::ForegroundRole, Qt::red);

        }

        ++itMember;

    }

    if (curr) {

        m_ui.signalList->setCurrentItem(curr);

    } else {

        selectedName.clear();

    }

    populateSlotList(selectedName);

    if (!curr)

        m_ui.slotList->setEnabled(false);

}

void ConnectDialog::editSignals()

{

    editSignalsSlots(m_source, m_sourceMode, SignalSlotDialog::FocusSignals);

}

void ConnectDialog::editSlots()

{

    editSignalsSlots(m_destination, m_destinationMode, SignalSlotDialog::FocusSlots);

}

void ConnectDialog::editSignalsSlots(QWidget *w, WidgetMode mode, int signalSlotDialogModeInt)

{

    const SignalSlotDialog::FocusMode signalSlotDialogMode = static_cast<SignalSlotDialog::FocusMode>(signalSlotDialogModeInt);

    switch (mode) {

    case  NormalWidget:

        break;

    case MainContainer:

        if (SignalSlotDialog::editMetaDataBase(m_formWindow, w, this, signalSlotDialogMode))

            populateLists();

        break;

    case PromotedWidget:

        if (SignalSlotDialog::editPromotedClass(m_formWindow->core(), w, this, signalSlotDialogMode))

            populateLists();

        break;

    }

}

}

QT_END_NAMESPACE