/*
    This file is part of the KDE libraries
    SPDX-FileCopyrightText: 2010 Teo Mrnjavac <teo@kde.org>

    SPDX-License-Identifier: LGPL-2.1-or-later
*/

#include "kaboutapplicationpersonlistdelegate_p.h"

#include "kaboutapplicationlistview_p.h"
#include "kaboutapplicationpersonmodel_p.h"
#include "ktoolbar.h"

#include <KLocalizedString>

#include <QAction>
#include <QApplication>
#include <QDesktopServices>
#include <QLabel>
#include <QPainter>
#include <QStandardPaths>

namespace KDEPrivate
{
Q_GLOBAL_STATIC(QPixmap, s_avatarFallback)
static QPixmap avatarFallback()
{
    if (s_avatarFallback->isNull()) {
        const QIcon icon = QIcon::fromTheme(QStringLiteral("user"));
        *s_avatarFallback = icon.pixmap(icon.actualSize(QSize(AVATAR_WIDTH / qGuiApp->devicePixelRatio(), AVATAR_HEIGHT / qGuiApp->devicePixelRatio())),
                                        QIcon::Normal,
                                        QIcon::On);
    }
    return *s_avatarFallback;
}

KAboutApplicationPersonListDelegate::KAboutApplicationPersonListDelegate(QAbstractItemView *itemView, QObject *parent)
    : KWidgetItemDelegate(itemView, parent)
{
}

QList<QWidget *> KAboutApplicationPersonListDelegate::createItemWidgets(const QModelIndex &index) const
{
    Q_UNUSED(index);
    QList<QWidget *> list;

    QLabel *textLabel = new QLabel(itemView());
    list.append(textLabel);

    KToolBar *mainLinks = new KToolBar(itemView(), false, false);

    QAction *emailAction = new QAction(QIcon::fromTheme(QStringLiteral("mail-send")), //
                                       i18nc("Action to send an email to a contributor", "Email contributor"),
                                       mainLinks);
    emailAction->setVisible(false);
    mainLinks->addAction(emailAction);
    QAction *homepageAction = new QAction(QIcon::fromTheme(QStringLiteral("internet-services")), //
                                          i18n("Visit contributor's homepage"),
                                          mainLinks);
    homepageAction->setVisible(false);
    mainLinks->addAction(homepageAction);
    QAction *visitProfileAction = new QAction(QIcon::fromTheme(QStringLiteral("get-hot-new-stuff")), QString(), mainLinks);
    visitProfileAction->setVisible(false);
    mainLinks->addAction(visitProfileAction);

    list.append(mainLinks);

    connect(mainLinks, &QToolBar::actionTriggered, this, &KAboutApplicationPersonListDelegate::launchUrl);

    return list;
}

void KAboutApplicationPersonListDelegate::updateItemWidgets(const QList<QWidget *> &widgets,
                                                            const QStyleOptionViewItem &option,
                                                            const QPersistentModelIndex &index) const
{
    const int margin = option.fontMetrics.height() / 2;

    KAboutApplicationPersonProfile profile = index.data().value<KAboutApplicationPersonProfile>();

    QRect wRect = widgetsRect(option, index);

    // Let's fill in the text first...
    QLabel *label = qobject_cast<QLabel *>(widgets.at(TextLabel));
    label->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

    QString text = buildTextForProfile(profile);

    label->move(wRect.left(), wRect.top());
    label->resize(wRect.width(), heightForString(text, wRect.width() - margin, option) + margin);
    label->setWordWrap(true);
    label->setContentsMargins(0, 0, 0, 0);
    label->setAlignment(Qt::AlignBottom | Qt::AlignLeft);
    label->setForegroundRole(QPalette::WindowText);

    label->setText(text);

    // And now we fill in the main links (email + homepage)
    KToolBar *mainLinks = qobject_cast<KToolBar *>(widgets.at(MainLinks));
    mainLinks->setIconSize(QSize(22, 22));
    mainLinks->setContentsMargins(0, 0, 0, 0);
    mainLinks->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    QAction *action;
    if (!profile.email().isEmpty()) {
        action = mainLinks->actions().at(EmailAction);
        action->setToolTip(i18nc("@info:tooltip Action to send an email to a contributor", "Email contributor\n%1", profile.email()));
        action->setData(QString(QLatin1String("mailto:") + profile.email()));
        action->setVisible(true);
    }
    if (!profile.homepage().isEmpty()) {
        action = mainLinks->actions().at(HomepageAction);
        action->setToolTip(i18nc("@info:tooltip", "Visit contributor's homepage\n%1", profile.homepage().toString()));
        action->setData(profile.homepage().toString());
        action->setVisible(true);
    }
    mainLinks->resize(QSize(mainLinks->sizeHint().width(), MAIN_LINKS_HEIGHT));
    mainLinks->move(wRect.left(), wRect.top() + label->height());
    itemView()->reset();
}

QSize KAboutApplicationPersonListDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    int margin = option.fontMetrics.height() / 2;

    int height = qMax(widgetsRect(option, index).height(), AVATAR_HEIGHT + 2 * margin);

    QSize metrics(option.fontMetrics.height() * 7, height);
    return metrics;
}

void KAboutApplicationPersonListDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    int margin = option.fontMetrics.height() / 2;

    QStyle *style = QApplication::style();
    style->drawPrimitive(QStyle::PE_Widget, &option, painter, nullptr);

    const KAboutApplicationPersonModel *model = qobject_cast<const KAboutApplicationPersonModel *>(index.model());

    if (model->showRemoteAvatars() && model->hasAvatarPixmaps()) {
        int height = qMax(widgetsRect(option, index).height(), AVATAR_HEIGHT + 2 * margin);
        QPoint point(option.rect.left() + 2 * margin, //
                     option.rect.top() + ((height - AVATAR_HEIGHT) / 2));

        KAboutApplicationPersonProfile profile = index.data().value<KAboutApplicationPersonProfile>();

        QPixmap fallback;
        if (profile.avatar().isNull()) {
            fallback = avatarFallback();
            fallback.setDevicePixelRatio(itemView()->devicePixelRatio());
        }
        const QPixmap &pixmap = profile.avatar().isNull() ? fallback : profile.avatar();
        point.setX((AVATAR_WIDTH - pixmap.width()) / 2 + 5);
        point.setY(option.rect.top() + ((height - pixmap.height()) / 2));
        painter->drawPixmap(point, pixmap);

        QPoint framePoint(point.x() - 5, point.y() - 5);
        QPixmap framePixmap(QStringLiteral(":/kxmlgui5/thumb_frame.png"));
        painter->drawPixmap(framePoint, framePixmap.scaled(pixmap.width() + 10, pixmap.height() + 10));
    }
}

void KAboutApplicationPersonListDelegate::launchUrl(QAction *action) const
{
    QString url = action->data().toString();
    if (!url.isEmpty()) {
        QDesktopServices::openUrl(QUrl(url));
    }
}

int KAboutApplicationPersonListDelegate::heightForString(const QString &string, int lineWidth, const QStyleOptionViewItem &option) const
{
    QFontMetrics fm = option.fontMetrics;
    constexpr auto opts = Qt::AlignLeft | Qt::AlignBottom | Qt::TextWordWrap;
    QRect boundingRect = fm.boundingRect(0, 0, lineWidth, 9999, opts, string);
    return boundingRect.height();
}

QString KAboutApplicationPersonListDelegate::buildTextForProfile(const KAboutApplicationPersonProfile &profile) const
{
    QString text = QLatin1String("<b>") + i18nc("@item Contributor name in about dialog.", "%1", profile.name()) + QLatin1String("</b>");

    if (!profile.task().isEmpty()) {
        text += QLatin1String("\n<br><i>%1</i>").arg(profile.task());
    }

    if (!profile.location().isEmpty()) {
        text += QLatin1String("\n<br>") + profile.location();
    }
    return text;
}

QRect KAboutApplicationPersonListDelegate::widgetsRect(const QStyleOptionViewItem &option, const QPersistentModelIndex &index) const
{
    KAboutApplicationPersonProfile profile = index.data().value<KAboutApplicationPersonProfile>();
    int margin = option.fontMetrics.height() / 2;

    QRect widgetsRect;
    if (qobject_cast<const KAboutApplicationPersonModel *>(index.model())->showRemoteAvatars()) {
        widgetsRect = QRect(option.rect.left() + AVATAR_WIDTH + 3 * margin, //
                            margin / 2, //
                            option.rect.width() - AVATAR_WIDTH - 4 * margin, //
                            0);
    } else {
        widgetsRect = QRect(option.rect.left() + margin, //
                            margin / 2, //
                            option.rect.width() - 2 * margin, //
                            0);
    }

    int textHeight = heightForString(buildTextForProfile(profile), widgetsRect.width() - margin, option);
    widgetsRect.setHeight(textHeight + MAIN_LINKS_HEIGHT + 1.5 * margin);

    return widgetsRect;
}

} // namespace KDEPrivate

#include "moc_kaboutapplicationpersonlistdelegate_p.cpp"