#include "appitem.h"

#include <QPainter>
#include <QDrag>
#include <QMouseEvent>

#define APP_ICON_KEY            "icon"
#define APP_MENU_KEY            "menu"
#define APP_XIDS_KEY            "app-xids"

#define APP_DRAG_THRESHOLD      20

DBusClientManager *AppItem::ClientInter = nullptr;
uint AppItem::ActiveWindowId = 0;

AppItem::AppItem(const QDBusObjectPath &entry, QWidget *parent)
    : DockItem(App, parent),
      m_itemEntry(new DBusDockEntry(entry.path(), this)),
      m_draging(false)
{
    initClientManager();

    m_data = m_itemEntry->data();

    connect(m_itemEntry, static_cast<void (DBusDockEntry::*)(const QString&, const QString&)>(&DBusDockEntry::DataChanged), this, &AppItem::entryDataChanged);
}

void AppItem::paintEvent(QPaintEvent *e)
{
    DockItem::paintEvent(e);

    if (m_draging)
        return;

    const QRect itemRect = rect();
    const int iconSize = std::min(itemRect.width(), itemRect.height());

    QRect iconRect;
    iconRect.setWidth(iconSize);
    iconRect.setHeight(iconSize);
    iconRect.moveTopLeft(itemRect.center() - iconRect.center());

    QPainter painter(this);

//    // draw current active background
//    if (m_windows.contains(ActiveWindowId))
//    {
//        painter.fillRect(rect(), Qt::blue);
//    } else if (m_data[APP_STATUS_KEY] == APP_ACTIVE_STATUS)
//    {
//        // draw active background
//        painter.fillRect(rect(), Qt::cyan);
//    } else {
//        // draw normal background
//        painter.fillRect(rect(), Qt::gray);
//    }

    // draw icon
    painter.fillRect(iconRect, Qt::yellow);

    // draw text
    painter.drawText(rect(), m_itemEntry->id());
}

void AppItem::mouseReleaseEvent(QMouseEvent *e)
{
    // activate
    // TODO: dbus signature changed
    if (e->button() == Qt::LeftButton)
        m_itemEntry->Activate();
}

void AppItem::mousePressEvent(QMouseEvent *e)
{
    m_mousePressPos = e->pos();
}

void AppItem::mouseMoveEvent(QMouseEvent *e)
{
    // handle drag
    if (e->buttons() != Qt::LeftButton)
        return;

    const QPoint distance = e->pos() - m_mousePressPos;
    if (distance.manhattanLength() < APP_DRAG_THRESHOLD)
        return;

    startDrag();
}

void AppItem::startDrag()
{
    m_draging = true;
    update();

    QPixmap pixmap(25, 25);
    pixmap.fill(Qt::red);

    QDrag *drag = new QDrag(this);
    drag->setPixmap(pixmap);
    drag->setHotSpot(pixmap.rect().center());
    drag->setMimeData(new QMimeData);

    const Qt::DropAction result = drag->exec(Qt::MoveAction);

    qDebug() << result;

    m_draging = false;
    update();
}

void AppItem::initClientManager()
{
    if (ClientInter)
        return;

    ClientInter = new DBusClientManager(this);
    connect(ClientInter, &DBusClientManager::ActiveWindowChanged, [&] (const uint wid) {
        ActiveWindowId = wid;
    });
}

void AppItem::entryDataChanged(const QString &key, const QString &value)
{
    qDebug() << "data chanegd" << key << value;

    // update data
    m_data[key] = value;

//    if (key == APP_STATUS_KEY)
        return update();
}