/*
 * Copyright (C) 2015 Canonical, Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "MirSurface.h"

#include <QDebug>

MirSurface::MirSurface(const QString& name,
        Mir::Type type,
        Mir::State state,
        const QUrl& screenshot,
        const QUrl &qmlFilePath)
    : unity::shell::application::MirSurfaceInterface(nullptr)
    , m_name(name)
    , m_type(type)
    , m_state(state)
    , m_orientationAngle(Mir::Angle0)
    , m_screenshotUrl(screenshot)
    , m_qmlFilePath(qmlFilePath)
    , m_live(true)
    , m_visible(true)
    , m_activeFocus(false)
    , m_width(-1)
    , m_height(-1)
{
//    qDebug() << "MirSurface::MirSurface() " << name;
}

MirSurface::~MirSurface()
{
//    qDebug() << "MirSurface::~MirSurface() " << name();
}

QString MirSurface::name() const
{
    return m_name;
}

Mir::Type MirSurface::type() const
{
    return m_type;
}

Mir::State MirSurface::state() const
{
    return m_state;
}

void MirSurface::setState(Mir::State state)
{
    if (state == m_state)
        return;

    m_state = state;
    Q_EMIT stateChanged(state);
}

bool MirSurface::live() const
{
    return m_live;
}

bool MirSurface::visible() const
{
    return m_visible;
}

void MirSurface::setLive(bool live)
{
//    qDebug().nospace() << "MirSurface::setLive("<<live<<") " << name();
    if (live == m_live)
        return;

    m_live = live;
    Q_EMIT liveChanged(live);

    if (!m_live && m_views.count() == 0) {
        deleteLater();
    }
}

QUrl MirSurface::qmlFilePath() const
{
    return m_qmlFilePath;
}

QUrl MirSurface::screenshotUrl() const
{
    return m_screenshotUrl;
}

void MirSurface::setScreenshotUrl(QUrl screenshotUrl)
{
    if (screenshotUrl == m_screenshotUrl)
        return;

    m_screenshotUrl = screenshotUrl;
    Q_EMIT screenshotUrlChanged(screenshotUrl);
}

Mir::OrientationAngle MirSurface::orientationAngle() const
{
    return m_orientationAngle;
}

void MirSurface::setOrientationAngle(Mir::OrientationAngle angle)
{
    if (angle == m_orientationAngle)
        return;

    m_orientationAngle = angle;
    Q_EMIT orientationAngleChanged(angle);
}



void MirSurface::registerView(qintptr viewId)
{
    m_views.insert(viewId, MirSurface::View{false});
//    qDebug().nospace() << "MirSurface[" << name() << "]::registerView(" << viewId << ")"
//                                      << " after=" << m_views.count();
}

void MirSurface::unregisterView(qintptr viewId)
{
//    qDebug().nospace() << "MirSurface[" << name() << "]::unregisterView(" << viewId << ")"
//                                      << " after=" << m_views.count() << " live=" << m_live;
    m_views.remove(viewId);
    if (!m_live && m_views.count() == 0) {
        deleteLater();
    }
    updateVisibility();
}

void MirSurface::setViewVisibility(qintptr viewId, bool visible)
{
    if (!m_views.contains(viewId)) return;

    m_views[viewId].visible = visible;
    updateVisibility();
}

void MirSurface::updateVisibility()
{
    bool newVisible = false;
    QHashIterator<qintptr, View> i(m_views);
    while (i.hasNext()) {
        i.next();
        newVisible |= i.value().visible;
    }

    if (newVisible != visible()) {
//        qDebug().nospace() << "MirSurface[" << name() << "]::updateVisibility(" << newVisible << ")";

        m_visible = newVisible;
        Q_EMIT visibleChanged(m_visible);
    }
}

bool MirSurface::activeFocus() const
{
    return m_activeFocus;
}

void MirSurface::setActiveFocus(bool value)
{
    if (m_activeFocus == value)
        return;

    m_activeFocus = value;

    Q_EMIT activeFocusChanged(value);
}

int MirSurface::width() const
{
    return m_width;
}

int MirSurface::height() const
{
    return m_height;
}

void MirSurface::resize(int width, int height)
{
    bool changed = false;
    if (width != m_width) {
        m_width = width;
        Q_EMIT widthChanged();
        changed = true;
    }

    if (m_height != height) {
        m_height = height;
        Q_EMIT heightChanged();
        changed = true;
    }

    if (changed) {
        Q_EMIT sizeChanged(QSize(width, height));
    }
}