#ifndef CLOUDSRENDERER_H
#define CLOUDSRENDERER_H

#include "software_global.h"

#include "LightFilter.h"

#include <vector>

namespace paysages {
namespace software {

/**
 * Software renderer of a group of cloud layers.
 */
class SOFTWARESHARED_EXPORT CloudsRenderer : public LightFilter {
  public:
    CloudsRenderer(SoftwareRenderer *parent);
    virtual ~CloudsRenderer();

    /**
     * Set the quality factor (0.0-1.0) for clouds rendering.
     */
    void setQuality(double factor);

    /**
     * Enable or disable the whole cloud rendering.
     */
    void setEnabled(bool enabled);

    /**
     * Update the renderer with the bound scenery.
     *
     * Don't call this if another thread is currently using this renderer.
     */
    virtual void update();

    /**
     * Get the layer renderer for a given layer.
     *
     * The returned renderer is managed by this object and should not be deleted.
     */
    virtual BaseCloudLayerRenderer *getLayerRenderer(unsigned int layer);

    /**
     * Get the cloud model for a given layer.
     *
     * The returned model is managed by this object and should not be deleted.
     */
    virtual BaseCloudsModel *getLayerModel(unsigned int layer);

    /**
     * Override de default density model for a given layer.
     *
     * This must be called after each update().
     * Ownership of the model is taken.
     */
    virtual void setLayerModel(unsigned int layer, BaseCloudsModel *model, bool delete_old = true);

    /**
     * Get the composited color, as applied on a base color and location.
     */
    virtual Color getColor(const Vector3 &eye, const Vector3 &location, const Color &base);

    /**
     * Alter a light, as if passed through all layers.
     *
     * Return true if the light was altered.
     */
    virtual bool applyLightFilter(LightComponent &light, const Vector3 &at) override;

    /**
     * Get the highest altitude of all layers.
     */
    double getHighestAltitude();

  private:
    double quality;

    bool enabled;
    SoftwareRenderer *parent;

    vector<BaseCloudLayerRenderer *> layer_renderers;
    BaseCloudLayerRenderer *fake_renderer;

    vector<BaseCloudsModel *> layer_models;
    BaseCloudsModel *fake_model;
};
}
}

#endif // CLOUDSRENDERER_H