//
//  ParticleSystemRenderer.h
//  cocos2d_libs
//
//  Created by 徐俊杰 on 2020/4/24.
//

#ifndef ParticleSystemRenderer_h
#define ParticleSystemRenderer_h
#include "2d/CCComponent.h"
//#include "cocos2d.h"
#include "rparticle/Macros/RParticleMacros.h"
#include "rparticle/RParticleSystem.h"
#include "rparticle/Modules/UVModule.h"

#define COMPONENT_PS_RENDERER "component_ps_renderer_un"
NS_RRP_BEGIN

class Mesh;
//struct MinMaxAABB;
//struct ParticleSystemVertex;
typedef cocos2d::V3F_C4B_T2F_Quad ParticleSystemVertex;

struct ParticleSystemRendererData
{
    // Must match the one in RendererModuleUI.cs
    enum { kMaxNumParticleMeshes = 4 };

    bool     orthographic;
    float    scale;
    int        renderMode;                ///< enum { Billboard = 0, Stretched = 1, Horizontal Billboard = 2, Vertical Billboard = 3, Mesh = 4 }
    int        sortMode;                ///< enum { None = 0, By Distance = 1, Youngest First = 2, Oldest First = 3 }
    float    maxParticleSize;        ///< How large is a particle allowed to be on screen at most? 1 is entire viewport. 0.5 is half viewport.
    float    cameraVelocityScale;    ///< How much the camera motion is factored in when determining particle stretching.
    float    velocityScale;            ///< When Stretch Particles is enabled, defines the length of the particle compared to its velocity.
    float    lengthScale;            ///< When Stretch Particles is enabled, defines the length of the particle compared to its width.
    float    sortingFudge;            ///< Lower the number, most likely that these particles will appear in front of other transparent objects, including other particles.
    float    normalDirection;        ///< Value between 0.0 and 1.0. If 1.0 is used, normals will point towards camera. If 0.0 is used, normals will point out in the corner direction of the particle.
    Mesh*    cachedMesh[kMaxNumParticleMeshes];

    /// Node hooked into the mesh user list of cached meshes so we get notified
    /// when a mesh goes away.
    ///
    /// NOTE: Must be initialized properly after construction to point to the
    ///          ParticleSystemRenderer.
    
    //ListNode<Object> cachedMeshUserNode[kMaxNumParticleMeshes];
    std::vector<RRP_PARTICLEQUAD_VERTEX_INFO> cachedVertexInfos;
};

//struct ParticleSystemParticles;
//struct ParticleSystemParticlesTempData;
//class ParticleSystem;
struct ParticleSystemGeomConstInputData;

class CC_DLL ParticleSystemRenderer
{
public:
    DECLARE_MODULE (ParticleSystemRenderer)
//    static ParticleSystemRenderer* create();
    virtual ~ParticleSystemRenderer();
    
    // int GetRenderMode(){return 1;};

    ParticleSystemRenderer (/*MemLabelId label, ObjectCreationMode mode*/);
        
    virtual void Render (RParticleSystem* system, ParticleSystemVertex* vbPtr/*int materialIndex, const ChannelAssigns& channels*/, const Matrix4x4f &transform);
    static void RenderMultiple (/*const BatchInstanceData* instances, size_t count, const ChannelAssigns& channels*/);
    //virtual void GetLocalAABB (AABB& result);
    //virtual void GetWorldAABB (AABB& result);
    virtual float GetSortingFudge () const;
    
    template<class TransferFunction>
    void Transfer (TransferFunction& transfer);

    //virtual void CheckConsistency ();
    virtual void Reset ();
    
    //virtual void AwakeFromLoad (AwakeFromLoadMode awakeMode);
        
    //void Update (const AABB& aabb);
    //void UpdateLocalAABB();
    
    void SetDirty () {}
    
    virtual void RendererBecameVisible();
    virtual void RendererBecameInvisible();
    static void SetUsesAxisOfRotationRec(RParticleSystem& system, bool first);
    //static void CombineBoundsRec(RParticleSystem& shuriken, MinMaxAABB& aabb, bool first);
    GET_SET_DIRTY (bool, Orthographic, m_Data.orthographic);
    GET_SET_DIRTY (float, Scale, m_Data.scale);
    GET_SET_DIRTY (int, RenderMode, m_Data.renderMode);
    GET_SET_DIRTY (int, SortMode, m_Data.sortMode) ;
    GET_SET_DIRTY (float, MaxParticleSize, m_Data.maxParticleSize) ;
    GET_SET_DIRTY (float, CameraVelocityScale, m_Data.cameraVelocityScale) ;
    GET_SET_DIRTY (float, VelocityScale, m_Data.velocityScale) ;
    GET_SET_DIRTY (float, LengthScale, m_Data.lengthScale) ;
    GET_SET_DIRTY (float, NormalDirection, m_Data.normalDirection) ;
    void SetSortingFudge(float value) { m_Data.sortingFudge = value; }
    std::vector<RRP_PARTICLEQUAD_VERTEX_INFO>& GetCachedVertexInfos() { return m_Data.cachedVertexInfos; }
    
    //void SetMesh (PPtr<Mesh> mesh){
    //    m_Mesh[0] = mesh;
    //    SetDirty();
    //    UpdateCachedMesh ();
    //}
    //PPtr<Mesh> GetMesh () const {
    //    return m_Mesh[0];
    //}
    //
    //const PPtr<Mesh>* GetMeshes () const {
    //    return m_Mesh;
    //}
    
    const ParticleSystemRendererData& GetData() const {
        return m_Data;
    }
        
#if UNITY_EDITOR
    bool GetEditorEnabled() const { return m_EditorEnabled; }
    void SetEditorEnabled(bool value) { m_EditorEnabled = value; }
#endif
    // For mesh we use world space rotation, else screen space
    bool GetScreenSpaceRotation() const { return m_Data.renderMode != kSRMMesh; };
    
private:
//    bool init();
    // from Renderer
    //virtual void UpdateRenderer ();
    void UpdateCachedMesh ();
    //void OnDidDeleteMesh (Mesh* mesh);
    static void CalculateTotalParticleCount(UInt32& totalNumberOfParticles, RParticleSystem& shuriken, bool first);
    static void CombineParticleBuffersRec(int& offset, ParticleSystemParticles& particles, ParticleSystemParticlesTempData& psTemp, RParticleSystem& shuriken, bool first, bool needsAxisOfRotation);
    //static void RenderBatch (const BatchInstanceData* instances, size_t count, size_t numParticles, const ChannelAssigns& channels);
    static void RenderInternal (RParticleSystem& system, const ParticleSystemRenderer& renderer, ParticleSystemVertex* vbPtr, UInt32 particleCountTotal, const Matrix4x4f &transform);
    ParticleSystemRendererData m_Data;
    //dynamic_array<UInt16> m_CachedIndexBuffer[ParticleSystemRendererData::kMaxNumParticleMeshes];
    //PPtr<Mesh> m_Mesh[ParticleSystemRendererData::kMaxNumParticleMeshes];
    MinMaxAABB    m_LocalSpaceAABB;
    
#if UNITY_EDITOR
    bool m_EditorEnabled;
#endif
    
    
    
    
    

    
};

NS_RRP_END

#endif /* ParticleSystemRenderer_h */