#pragma once

#include "ofMain.h"
#include "ofxJSON.h"
#include "ofxEasing.h"
#include "ofxGpuRemapBlend.h"

#define min(a,b) ((a) < (b) ? (a) : (b))
#define max(a,b) ((a) > (b) ? (a) : (b))

#define THUMB_BORDER_RATIO 0.8
#define THUMB_SIZE 160
#define DEFAULT_FADEIN 1.0
#define BEZIER_OUT 0.25
#define BEZIER_IN 0.25
#define ROTATION_BEZIER_FRACTION 0.0
#define ROTATION_EASE_POWER 4.0

#define SWITCH_NONE 0
#define SWITCH_FORWARD 1
#define SWITCH_REVERSE 2

//#define GPU_ALGORITHM

//so annoying 1: menubar
//so annoying 2: dialogue stops screen

template <typename T> int sgn(T val) {
    return (T(0) < val) - (val < T(0));
}


class chainImage : public ofImage{

	public:
		chainImage(){
			link=NULL;
			ofImage();
			isLoaded=false;
			colour=ofColor(255,255,255);
		}
		void init(ofPoint _linkPos,float _linkScale,float _linkRot);

		void start(bool reverse=false);
		bool tload(std::string _filename){
			printf("tload : %s\n",_filename.c_str());
			filename=_filename;
			if (ofImage::load(filename)){
				makeThumbnail();
				//setImageType(OF_IMAGE_COLOR_ALPHA);
				//could there be a way to load without committing the texture
				//setUseTexture(false);
				setAnchorPoint(getWidth()/2,getHeight()/2);
				isLoaded=true;
				return true;
			}
			else printf("could not load : %s\n",_filename.c_str());

			return false;
		}

		void setAlpha(uint8_t a){
			if (isAllocated()){
				ofPixelsRef pixels = getPixels();
				//uint8_t *im=(uint8_t *)&getPixels();
				for (int i=0;i<getWidth()*getHeight();i++){
					pixels[i]|=a;
				}
			}
		}

		void setAlpha(float a){
			setAlpha((uint8_t)(a*255.0f));
		}

		int updateOutput(float decayRatio);
		ofVec3f getTransform();
		float getScale();
		float getRotation();
		ofPoint getLinkPos();
		float getLinkRot();
		float getLinkScale();

		void updateRotationTimeline();

		void drawChain(float fadeIn=DEFAULT_FADEIN,bool additive =false, float intensity=1.0f, float zoomMultiplier=1.0f,float startGamma=1.0f);
		void gpu_drawChain(float fadeIn=DEFAULT_FADEIN,bool additive =false, float intensity=1.0f, float zoomMultiplier=1.0f);
		void gpu_drawImage();

		void drawRecursive(float fadeIn,bool additive,float intensity,float zoomMultiplier, float fadeStart, float fadeEnd);


		ofImage thumbnail;
		void makeThumbnail();
		void setupTextures();

		Json::Value toJson();
		bool fromJson(Json::Value json);

		ofPoint getPathPoint();

		chainImage *link;
		chainImage *linked;

		ofPoint linkPos;
		ofPoint dragPos;
		float linkScale;
		float dragScale;
		float linkRot;
		float dragRot;

		ofColor colour;

		std::string filename;

		float transition;
		float fadeIn;
		float speed;
		float time;
		float scale;

		ofPolyline path;
		ofPolyline rotationTimeline;

		bool isLoaded;

		//ofShader shader;
		//ofxGpuRemapBlend map;

		//int totalframes,framecount;

};