/****************************************************************************
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
 
 http://www.cocos2d-x.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

#pragma once

#include "ui/CocosGUI.h"

#include "extensions/cocos-ext.h"
#include "../BaseTest.h"

DEFINE_TEST_SUITE(ShaderTests);

class ShaderTestDemo : public TestCase
{
public:
};

class ShaderMonjori : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderMonjori);
    ShaderMonjori();

    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class ShaderMandelbrot : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderMandelbrot);
    ShaderMandelbrot();

    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class ShaderJulia : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderJulia);
    ShaderJulia();

    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class ShaderHeart : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderHeart);
    ShaderHeart();

    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class ShaderFlower : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderFlower);
    ShaderFlower();

    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class ShaderPlasma : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderPlasma);
    ShaderPlasma();

    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class SpriteBlur;
class ShaderBlur : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderBlur);
    ShaderBlur();
    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
    void createSliderCtls();
    void onRadiusChanged(cocos2d::Ref* sender, cocos2d::extension::Control::EventType controlEvent);
    void onSampleNumChanged(cocos2d::Ref* sender, cocos2d::extension::Control::EventType controlEvent);
    
protected:
    SpriteBlur* _blurSprite;
    cocos2d::extension::ControlSlider* _sliderRadiusCtl;
    cocos2d::extension::ControlSlider* _sliderNumCtrl;
};

class ShaderRetroEffect : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderRetroEffect);
    ShaderRetroEffect();
    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
    virtual void update(float dt) override;
protected:
    cocos2d::Label* _label;
    float           _accum;
};

class ShaderNode : public cocos2d::Node
{
public:
    CREATE_FUNC(ShaderNode);
    static ShaderNode* shaderNodeWithVertex(const std::string &vert, const std::string &frag);

    virtual void update(float dt) override;
    virtual void setPosition(const cocos2d::Vec2 &newPosition) override;
    virtual void draw(cocos2d::Renderer* renderer, const cocos2d::Mat4& transform, uint32_t flags) override;

protected:
    ShaderNode();
    ~ShaderNode();

    bool initWithVertex(const std::string &vert, const std::string &frag);
    void loadShaderVertex(const std::string &vert, const std::string &frag);

    virtual void setProgramState(cocos2d::backend::ProgramState *programState) override
    {
        if (programState != _programState)
        {
            CC_SAFE_RELEASE_NULL(_programState);
            _programState = programState;
            CC_SAFE_RETAIN(_programState);
        }
        _customCommand.getPipelineDescriptor().programState = programState;
        updateUniforms();
    }

    void updateUniforms();

    //cocos2d::backend::ProgramState * getProgramState() const { return _programState; }

    cocos2d::Vec2                   _center;
    cocos2d::Vec2                   _resolution;
    float                           _time;
    std::string                     _vertFileName;
    std::string                     _fragFileName;
    cocos2d::CustomCommand          _customCommand;
    cocos2d::backend::ProgramState  *_programState = nullptr;

    cocos2d::backend::UniformLocation   _locResolution;
    cocos2d::backend::UniformLocation   _locCenter;
    cocos2d::backend::UniformLocation   _locMVP;
    cocos2d::backend::UniformLocation   _locTime;
    cocos2d::backend::UniformLocation   _locSinTime;
    cocos2d::backend::UniformLocation   _locCosTime;
    cocos2d::backend::UniformLocation   _locScreenSize;
};

class ShaderLensFlare : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderLensFlare);
    ShaderLensFlare();
    
    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class ShaderGlow : public ShaderTestDemo
{
public:
    CREATE_FUNC(ShaderGlow);
    ShaderGlow();
    
    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};

class ShaderMultiTexture : public ShaderTestDemo
{
    static const int rightSpriteTag = 2014;
public:
    CREATE_FUNC(ShaderMultiTexture);
    ShaderMultiTexture();
    cocos2d::ui::Slider* createSliderCtl();
    void changeTexture(cocos2d::Ref*);
    int _changedTextureId;
    cocos2d::Sprite* _sprite;

    virtual std::string title() const override;
    virtual std::string subtitle() const override;
    virtual bool init() override;
};