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/*  Visualization Library                                                             */
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#ifndef Terrain_INCLUDE_ONCE
#define Terrain_INCLUDE_ONCE

#include <vlGraphics/SceneManagerActorKdTree.hpp>
#include <vlGraphics/ShaderNode.hpp>

namespace vl
{
  class VLGRAPHICS_EXPORT Terrain: public SceneManagerActorKdTree
  {
    VL_INSTRUMENT_CLASS(vl::Terrain, SceneManagerActorKdTree)

  public:
    Terrain(): 
        mShaderNode(new ShaderNode), mWidth(0), mHeight(0), mDepth(0), mDetailRepetitionCount(0), 
        mHeightmapTextureFormat(TF_LUMINANCE16F), mTerrainTextureFormat(TF_RGB), mDetailTextureFormat(TF_RGB),
        mUseGLSL(true) 
    {
      mChunks.setAutomaticDelete(false);
    }

    void init();

    bool useGLSL() const { return mUseGLSL; }
    int detailRepetitionMode() const { return mDetailRepetitionCount; }
    double width() const { return mWidth; }
    double depth() const { return mDepth; }
    double height() const { return mHeight; }
    const vec3& origin() const { return mOrigin; }
    const String& detailTexture() const { return mDetailTexture; }
    const String& terrainTexture() const { return mTerrainTexture; }
    const String& heightmapTexture() const { return mHeightmapTexture; }
    ETextureFormat heightmapTextureFormat() const { return mHeightmapTextureFormat; }
    ETextureFormat terrainTextureFormat() const { return mTerrainTextureFormat; }
    ETextureFormat detailTextureFormat() const { return mDetailTextureFormat; }

    void setUseGLSL(bool enable) { mUseGLSL = enable; }
    void setDetailRepetitionCount(int count) { mDetailRepetitionCount = count; }
    void setWidth(double w)  { mWidth = w; }
    void setDepth(double d)  { mDepth = d; }
    void setHeight(double h) { mHeight = h; }
    void setOrigin(const vec3& origin) { mOrigin = origin; }
    void setHeightmapTextureFormat(ETextureFormat format) { mHeightmapTextureFormat = format; }
    void setTerrainTextureFormat(ETextureFormat format) { mTerrainTextureFormat = format; }
    void setDetailTextureFormat(ETextureFormat format) { mDetailTextureFormat = format; }

    void setVertexShader(const String& vs_path) { mVertexShader = vs_path; }
    const String& vertexShader() const { return mVertexShader; }

    void setFragmentShader(const String& fs_path) { mFragmentShader = fs_path; }
    const String& fragmentShader() const { return mFragmentShader; }

    const ActorCollection& chunks() const { return mChunks; }
    int chunkCount() const { return mChunks.size(); }
    Actor* chunk(int i) { return mChunks[i].get(); }
    const Actor* chunk(int i) const { return mChunks[i].get(); }

    void setDetailTexture(const String& texture) { mDetailTexture = texture; }
    void setTerrainTexture(const String& texture) { mTerrainTexture = texture; }
    void setHeightmapTexture(const String& texture) { mHeightmapTexture = texture; }

    const ShaderNode* shaderNode() const { return mShaderNode.get(); }
    ShaderNode* shaderNode() { return mShaderNode.get(); }

  protected:
    ref<ShaderNode> mShaderNode;
    ActorCollection mChunks;
    double mWidth;
    double mHeight;
    double mDepth;
    vec3 mOrigin;
    String mDetailTexture;
    String mTerrainTexture;
    String mHeightmapTexture;
    String mVertexShader;
    String mFragmentShader;
    int mDetailRepetitionCount;
    ETextureFormat mHeightmapTextureFormat;
    ETextureFormat mTerrainTextureFormat;
    ETextureFormat mDetailTextureFormat;
    bool mUseGLSL;
  };
}

#endif