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#include "animation.h"

#include <QPointF>

#include <QIODevice>

#include <QDataStream>

class Frame 

{

public:

    Frame() {

    }

    int nodeCount() const 

    {

        return m_nodePositions.size();

    }

    void setNodeCount(int nodeCount)

    {

        while (nodeCount > m_nodePositions.size())

            m_nodePositions.append(QPointF());            

        while (nodeCount < m_nodePositions.size())

            m_nodePositions.removeLast();

    }

    QPointF nodePos(int idx) const

    {

        return m_nodePositions.at(idx);

    }

    void setNodePos(int idx, const QPointF &pos)

    {

        m_nodePositions[idx] = pos;

    }

private:

    QList<QPointF> m_nodePositions;

};

Animation::Animation()

{

    m_currentFrame = 0;

    m_frames.append(new Frame);

}

Animation::~Animation() 

{

    qDeleteAll(m_frames);

}

void Animation::setTotalFrames(int totalFrames)

{

    while (m_frames.size() < totalFrames)

        m_frames.append(new Frame);    

    while (totalFrames < m_frames.size())

        delete m_frames.takeLast();    

}

int Animation::totalFrames() const

{

    return m_frames.size();

}

void Animation::setCurrentFrame(int currentFrame)

{

    m_currentFrame = qMax(qMin(currentFrame, totalFrames()-1), 0);

}

int Animation::currentFrame() const

{

    return m_currentFrame;

}

void Animation::setNodeCount(int nodeCount)

{

    Frame *frame = m_frames.at(m_currentFrame);

    frame->setNodeCount(nodeCount);

}

int Animation::nodeCount() const

{

    Frame *frame = m_frames.at(m_currentFrame);

    return frame->nodeCount();

}

void Animation::setNodePos(int idx, const QPointF &pos)

{

    Frame *frame = m_frames.at(m_currentFrame);

    frame->setNodePos(idx, pos);

}

QPointF Animation::nodePos(int idx) const

{

    Frame *frame = m_frames.at(m_currentFrame);

    return frame->nodePos(idx);

}

QString Animation::name() const

{

    return m_name;

}

void Animation::setName(const QString &name)

{

    m_name = name;

}

void Animation::save(QIODevice *device) const

{

    QDataStream stream(device);

    stream << m_name;

    stream << m_frames.size();

    foreach (Frame *frame, m_frames) {

        stream << frame->nodeCount();

        for (int i=0; i<frame->nodeCount(); ++i)

            stream << frame->nodePos(i);

    }

}

void Animation::load(QIODevice *device)

{

    if (!m_frames.isEmpty())

        qDeleteAll(m_frames);

    m_frames.clear();

    QDataStream stream(device);

    stream >> m_name;

    int frameCount;

    stream >> frameCount;

    for (int i=0; i<frameCount; ++i) {

        int nodeCount;

        stream >> nodeCount;

        Frame *frame = new Frame;

        frame->setNodeCount(nodeCount);

        for (int j=0; j<nodeCount; ++j) {

            QPointF pos;

            stream >> pos;

            frame->setNodePos(j, pos);

        }

        m_frames.append(frame);

    }

}