#ifndef GRAPH_H
#define GRAPH_H

#include "Poco/StringTokenizer.h"

#include "rotor.h"
#include "nodes_signals.h"
#include "nodes_audio_analysis.h"


/*------------------------

Graph is an instance of a rotor renderer

tidy up loading stuff
kill xml or retain?
make codebase closer

-validate loader menthod
get number of nodes
copy nodes `

-------------------------*/

namespace Rotor {
	class Graph{
		public:
			Graph(){duration=20.0f;loaded = false;outW=640;outH=360;audio_thumb=new Audio_thumbnailer();use_fragmentation=false;};
			Graph(const string& _uid,const string& _desc){
				init(_uid,_desc);
				audio_loaded=false;
				bitRate=1000000;
			};
			void init(const string& _uid,const string& _desc){
				uid=_uid;
				description=_desc;
				duration=20.0f;
				framerate=25.0f;
				cancelled=false;
			};
			~Graph(){ clear(); delete audio_thumb;};
			void clear(){
				for (auto n: nodes) {
					delete n.second;
				}
				nodes.clear();
				loaded=false;
			}
			string uid;								//every version of a graph has a UUID, no particular need to actually read its data(?)
													//?? is it faster than using strings??
			string description;
			std::unordered_map<string,Node*> nodes;
			vector<Node*> find_nodes(const string &type); //could be a way of finding a set based on capabilities?
			Node* find_node(const string &type);
			bool signal_render(xmlIO &XML,const float framerate);
			bool video_render(const string &output_filename,const float framerate,int start, int end);
			bool load(string data,string media_path);
			bool loadFile(string &filename,string media_path);
			bool parseXml(string media_path);
			bool parseJson(string &data,string &media_path);
			bool set_resolution(int w,int h);
			bool preview(xmlIO &XML,string &node,string &format,int frame,int w,int h);
			bool check_audio(string audio,string path);
			bool print_features(xmlIO &XML,string &node);
			bool load_audio(const string &filename,vector<Audio_processor*> processors);
			bool load_video(const string &nodeID,const string &filename);//can be performance or clip
			bool set_bitrate(int b){
				if (b>64000){
					bitRate=b;
					return true;
				}
				else return false;
			}
			bool set_fragmentation(bool f){
				use_fragmentation=f;
				return true;
			}
			bool loaded;
			float duration;
			float framerate;
			const string graphToString();
			xmlIO xml;
			bool audio_loaded;
			string audio_filename;
			bool cancelled;
			float progress;
			int bitRate;

			//Poco::Mutex mutex;     //lock for access from parent thread

			Audio_thumbnailer *audio_thumb;
		private:
			int outW,outH;
			bool use_fragmentation;

	};
	class Thumbnailer{
		public:
			bool make(const string &inputfilename,int w,int h,const string &outputfilename) {
				Poco::StringTokenizer t1(inputfilename,".");
				if (t1.count()>1) {
					if (t1[t1.count()-1]=="svg"){
						cerr<<"found an svg"<<endl;
						RsvgHandle * rsvg=rsvg_handle_new_from_file(inputfilename.c_str(),nullptr);
						if (rsvg) {
							RsvgDimensionData dims;
							rsvg_handle_get_dimensions(rsvg,&dims);
							cerr<<"Rotor: SVG loaded "<<inputfilename<<" , "<<dims.width<<"x"<<dims.height<<endl;
							cv::Mat cp=cv::Mat(h,w,CV_8UC4);
							cv::Mat co=cv::Mat(h,w,CV_8UC3);
						    cairo_surface_t * cs = cairo_image_surface_create_for_data (cp.data,
			                                                         CAIRO_FORMAT_RGB24,
			                                                         w,
			                                                         h,
			                                                         w*4);
						    cairo_t * cr = cairo_create (cs);
						    cairo_translate(cr, w/2, h/2);
						    cairo_scale(cr, ((float)w)/640.0f,((float)w)/640.0f);
						    cairo_translate(cr, -w/2, -h/2);
						    cairo_translate(cr, w/2-(dims.width/2), h/2-(dims.height/2));
							rsvg_handle_render_cairo(rsvg,cr);
							cv::cvtColor(cp,co,CV_RGBA2BGR,3);
							cv::imwrite(outputfilename.c_str(),co);
							cairo_destroy(cr);
							cairo_surface_destroy(cs);
							rsvg_handle_close(rsvg,nullptr);
							g_object_unref(rsvg);
							return true;
						}
						else {
							cerr<<"Rotor: SVG failed to load "<<inputfilename<<endl;
							return false;
						}
					}
				}
				//if not svg feed to FFMS2
				if (player.open(inputfilename)){
					if (player.fetch_frame(w,h,player.get_number_frames()/4)) {
						Image i;
						i.setup_fromRGB(w,h,player.frame->Data[0],player.frame->Linesize[0]-(w*3));
						cv::Mat cp;
						cvtColor(i.rgb,cp,CV_RGB2BGR);
						cv::imwrite(outputfilename.c_str(),cp);
						return true;
					}
				}
				return false;
			}
		private:
			libav::video_decoder player;
	};
}
#endif