/****************************************************************************

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Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).*

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modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,

* this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,

* this list of conditions and the following disclaimer in the documentation

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* Neither the name of Nokia Corporation and its Subsidiary(-ies) nor the

* names of its contributors may be used to endorse or promote products

* derived from this software without specific prior written permission.

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****************************************************************************/

#ifndef MAZESCENE_H

#define MAZESCENE_H

#include <QGraphicsItem>

#include <QGraphicsScene>

#include <QGraphicsView>

#include <QLineEdit>

#include <QPlainTextEdit>

#include <QPointF>

#include <QPushButton>

#include <QTime>

#include <QTimeLine>

#include <QMatrix4x4>

class MazeScene;

class MediaPlayer;

class Entity;

class WalkingItem;

class View : public QGraphicsView

{

    Q_OBJECT

public:

    View();

    void resizeEvent(QResizeEvent *event);

    void setScene(MazeScene *scene);

    void paintEvent(QPaintEvent *event);

private:

    MazeScene *m_scene;

    bool m_firstPaint;

};

class Camera

{

public:

    Camera()

        : m_yaw(0)

        , m_pitch(0)

        , m_fov(70)

        , m_time(0)

        , m_matrixDirty(true)

    {

    }

    qreal yaw() const { return m_yaw; }

    qreal pitch() const { return m_pitch; }

    qreal fov() const { return m_fov; }

    QPointF pos() const { return m_pos; }

    void setYaw(qreal yaw);

    void setPitch(qreal pitch);

    void setPos(const QPointF &pos);

    void setFov(qreal fov);

    void setTime(qreal time);

    const QMatrix4x4 &viewProjectionMatrix() const;

    const QMatrix4x4 &viewMatrix() const;

private:

    void updateMatrix() const;

    qreal m_yaw;

    qreal m_pitch;

    qreal m_fov;

    qreal m_time;

    QPointF m_pos;

    mutable bool m_matrixDirty;

    mutable QMatrix4x4 m_viewMatrix;

    mutable QMatrix4x4 m_viewProjectionMatrix;

};

class Light

{

public:

    Light() {}

    Light(const QPointF &pos, qreal intensity);

    qreal intensityAt(const QPointF &pos) const;

    QPointF pos() const { return m_pos; }

    qreal intensity() const { return m_intensity; }

private:

    QPointF m_pos;

    qreal m_intensity;

};

class ProjectedItem : public QGraphicsItem

{

public:

    ProjectedItem(const QRectF &bounds, bool shadow = true, bool opaque = true);

    QPointF a() const { return m_a; }

    QPointF b() const { return m_b; }

    virtual void updateTransform(const Camera &camera);

    void setOpaque(bool opaque);

    bool isOpaque() const;

    QRectF boundingRect() const;

    void setPosition(const QPointF &a, const QPointF &b);

    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

    void setAnimationTime(qreal time);

    void setImage(const QImage &image);

    void updateLighting(const QVector<Light> &lights, bool useConstantLight);

    void setLightingEnabled(bool enabled);

    void setObscured(bool obscured);

    bool isObscured() const;

private:

    QPointF m_a;

    QPointF m_b;

    QRectF m_bounds;

    QRectF m_targetRect;

    QImage m_image;

    QGraphicsRectItem *m_shadowItem;

    bool m_opaque;

    bool m_obscured;

};

class WallItem : public ProjectedItem

{

public:

    WallItem(MazeScene *scene, const QPointF &a, const QPointF &b, int type);

    QGraphicsProxyWidget *childItem() const

    {

        return m_childItem;

    }

    int type() const { return m_type; }

    void childResized();

private:

    QGraphicsProxyWidget *m_childItem;

    int m_type;

    qreal m_scale;

};

class MazeScene : public QGraphicsScene

{

    Q_OBJECT

public:

    MazeScene(const QVector<Light> &lights, const char *map, int width, int height);

    void addProjectedItem(ProjectedItem *item);

    void addEntity(Entity *entity);

    void addWall(const QPointF &a, const QPointF &b, int type);

    void drawBackground(QPainter *painter, const QRectF &rect);

    bool tryMove(QPointF &pos, const QPointF &delta, Entity *entity = 0) const;

    Camera camera() const { return m_camera; }

    void viewResized(QGraphicsView *view);

    void setAcceleratedViewport(bool accelerated);

protected:

    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);

    void keyPressEvent(QKeyEvent *event);

    void keyReleaseEvent(QKeyEvent *event);

    bool eventFilter(QObject *target, QEvent *event);

    bool handleKey(int key, bool pressed);

public slots:

    void move();

    void toggleRenderer();

    void toggleDoors();

    void loadFinished();

private slots:

    void moveDoors(qreal value);

private:

    bool blocked(const QPointF &pos, Entity *entity) const;

    void updateTransforms();

    void updateRenderer();

    QVector<WallItem *> m_walls;

    QVector<WallItem *> m_doors;

    QVector<QGraphicsItem *> m_floorTiles;

    QVector<QPushButton *> m_buttons;

    QVector<Entity *> m_entities;

    QVector<Light> m_lights;

    QVector<ProjectedItem *> m_projectedItems;

    Camera m_camera;

    qreal m_walkingVelocity;

    qreal m_strafingVelocity;

    qreal m_turningSpeed;

    qreal m_pitchSpeed;

    qreal m_deltaYaw;

    qreal m_deltaPitch;

    QTime m_time;

    QTimeLine *m_doorAnimation;

    long m_simulationTime;

    long m_walkTime;

    int m_width;

    int m_height;

    MediaPlayer *m_player;

    QPointF m_playerPos;

    bool m_accelerated;

    WalkingItem *m_walkingItem;

};

#endif