#ifndef HEADER_FEATURE_UNLOCKED_HPP
#define HEADER_FEATURE_UNLOCKED_HPP

#include "guiengine/screen.hpp"
#include "utils/ptr_vector.hpp"

namespace irr { namespace scene { class ISceneNode; class ICameraSceneNode; class ILightSceneNode; } }
class KartProperties;
class Challenge;

/**
  * \brief Screen shown when a feature has been unlocked
  * \ingroup states_screens
 */
class FeatureUnlockedCutScene : public GUIEngine::Screen, public GUIEngine::ScreenSingleton<FeatureUnlockedCutScene>
{
    friend class GUIEngine::ScreenSingleton<FeatureUnlockedCutScene>;
    
    FeatureUnlockedCutScene();
    
    /** Whichever of these is non-null decides what comes out of the chest */
    struct UnlockedThing
    {
        /** Will be non-null if this unlocked thing is a kart */
        KartProperties* m_unlocked_kart;
        
        /** Will be non-empty if this unlocked thing is one or many pictures */
        std::vector<irr::video::ITexture*> m_pictures;
        /** Will be set if this unlocked thing is a picture */
        float m_w, m_h;
        /** used for slideshows */
        int m_curr_image;
        
        /** Contains whatever is in the chest */
        scene::ISceneNode* m_root_gift_node;
        
        irr::core::stringw m_unlock_message;
        
        UnlockedThing(KartProperties* kart, irr::core::stringw msg)
        {
            m_unlocked_kart = kart;
            m_unlock_message = msg;
            m_curr_image = -1;
        }
        
        /**
          * Creates a 'picture' reward.
          * \param pict  the picture to display as reward.
          * \param w     width of the picture to display
          * \param y     height of the picture to display
          */
        UnlockedThing(irr::video::ITexture* pict, float w, float h, irr::core::stringw msg)
        {
            m_unlocked_kart = NULL;
            m_pictures.push_back(pict);
            m_w = w;
            m_h = h;
            m_unlock_message = msg;
            m_curr_image = -1;
        }
        
        /**
         * Creates a 'picture slideshow' reward.
         * \param picts the pictures to display as reward.
         * \param w     width of the pictures to display
         * \param y     height of the pictures to display
         */
        UnlockedThing(std::vector<irr::video::ITexture*> picts, float w, float h, irr::core::stringw msg)
        {
            m_unlocked_kart = NULL;
            m_pictures = picts;
            m_w = w;
            m_h = h;
            m_unlock_message = msg;
            m_curr_image = 0;
        }
        
        ~UnlockedThing()
        {
            if (m_root_gift_node != NULL) irr_driver->removeNode(m_root_gift_node);
            m_root_gift_node = NULL;
        }
    };
    ptr_vector<UnlockedThing, HOLD> m_unlocked_stuff;
    
    
    /** sky angle, 0-360 */
    float m_sky_angle;
    
    /** Global evolution of time */
    double m_global_time;
    
    /** Key position from origin (where the chest is) */
    float m_key_pos;
    
    /** Angle of the key (from 0 to 1, simply traces progression) */
    float m_key_angle;
    
    irr::scene::ISceneNode* m_sky;
    irr::scene::ICameraSceneNode* m_camera;
    irr::scene::IAnimatedMeshSceneNode* m_chest;
    //irr::scene::ISceneNode* m_chest_top;
    //irr::scene::ISceneNode* m_key;
    irr::scene::ILightSceneNode* m_light;
    
    void continueButtonPressed();
    
public:

    void onUpdate(float dt, irr::video::IVideoDriver*);
    
    void init();
    void tearDown();
    
    void eventCallback(GUIEngine::Widget* widget, const std::string& name, const int playerID);
    
    /** Call before showing up the screen to make a kart come out of the chest.
        'addUnlockedThings' will invoke this, so you generally don't need to call this directly. */
    void addUnlockedKart(KartProperties* unlocked_kart, irr::core::stringw msg);
    
    /** Call before showing up the screen to make a picture come out of the chest
        'addUnlockedThings' will invoke this, so you generally don't need to call this directly. */
    void addUnlockedPicture(irr::video::ITexture* picture, float w, float h, irr::core::stringw msg);
    
    /** Call before showing up the screen to make a picture slideshow come out of the chest
        'addUnlockedThings' will invoke this, so you generally don't need to call this directly. */
    void addUnlockedPictures(std::vector<irr::video::ITexture*> pictures,
                             float w, float h, irr::core::stringw msg);
    
    /** Call before showing up the screen to make whatever the passed challenges unlocked
      * come out of the chest */
    void addUnlockedThings(const std::vector<const Challenge*> unlocked);
    
    
    /** override from base class to handle escape press */
    virtual bool onEscapePressed();
};

#endif