//
//  RenderablePolyLineEntityItem.h
//  libraries/entities-renderer/src/
//
//  Created by Eric Levin on 6/22/15.
//  Copyright 2015 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

#ifndef hifi_RenderablePolyLineEntityItem_h
#define hifi_RenderablePolyLineEntityItem_h

#include "RenderableEntityItem.h"
#include <PolyLineEntityItem.h>
#include <TextureCache.h>

namespace render { namespace entities {

class PolyLineEntityRenderer : public TypedEntityRenderer<PolyLineEntityItem> {
    using Parent = TypedEntityRenderer<PolyLineEntityItem>;
    friend class EntityRenderer;

public:
    PolyLineEntityRenderer(const EntityItemPointer& entity);

    virtual scriptable::ScriptableModelBase getScriptableModel() override;
protected:
    virtual bool needsRenderUpdateFromTypedEntity(const TypedEntityPointer& entity) const override;
    virtual void doRenderUpdateSynchronousTyped(const ScenePointer& scene, 
                                                Transaction& transaction, 
                                                const TypedEntityPointer& entity) override;
    virtual void doRenderUpdateAsynchronousTyped(const TypedEntityPointer& entity) override;

    virtual ItemKey getKey() override;
    virtual ShapeKey getShapeKey() override;
    virtual void doRender(RenderArgs* args) override;

    virtual bool isTransparent() const override { return true; }

    struct Vertex {
        Vertex() {}
        Vertex(const vec3& position, const vec3& normal, const vec2& uv, const vec3& color) : position(position), 
                                                                                              normal(normal), 
                                                                                              uv(uv), 
                                                                                              color(color) {}
        vec3 position;
        vec3 normal;
        vec2 uv;
        vec3 color;
    };

    void updateGeometry(const std::vector<Vertex>& vertices);
    static std::vector<Vertex> updateVertices(const QVector<glm::vec3>& points, 
                                              const QVector<glm::vec3>& normals, 
                                              const QVector<float>& strokeWidths, 
                                              const QVector<glm::vec3>& strokeColors, 
                                              const bool isUVModeStretch,
                                              const float textureAspectRatio);

    Transform _polylineTransform;
    QVector<glm::vec3> _lastPoints;
    QVector<glm::vec3> _lastNormals;
    QVector<glm::vec3> _lastStrokeColors;
    QVector<float> _lastStrokeWidths;
    gpu::BufferPointer _verticesBuffer;
    gpu::BufferView _uniformBuffer;
    
    uint32_t _numVertices { 0 };
    bool _empty{ true };
    NetworkTexturePointer _texture;
    float _textureAspectRatio { 1.0f };

};

} } // namespace 

#endif // hifi_RenderablePolyLineEntityItem_h