#include <string>
#include <sstream>
#include <iostream>
#include <map>
#include <unordered_map>


namespace Rotor {

	class Node;
	template <class NT> class Node_type;

	class Audio_frame{
		public:
			Audio_frame(uint16_t *_samples,int _channels,int _numsamples){
				samples=_samples;
				channels=_channels;
				numsamples=_numsamples;
			}
			uint16_t *samples;
			int channels,numsamples;
	};
	class Frame_parameters{
		public:
			Frame_parameters(double _time,double _framerate,double _duration,int _w,int _h,Audio_frame *_audio=nullptr)
			{ time=_time; framerate=_framerate; duration=_duration; w=_w; h=_h;audio=_audio;};
			Frame_parameters(int _frame,double _framerate,double _duration,int _w,int _h,Audio_frame *_audio=nullptr)
			{ time=((double)_frame)/_framerate; framerate=_framerate; duration=_duration; w=_w; h=_h;audio=_audio;};
			int h,w;
			Frame_parameters lastframe() const{
				return Frame_parameters(time-(1.0/framerate),framerate,duration,w,h);
			}
			Frame_parameters nextframe() const{
				return Frame_parameters(time+(1.0/framerate),framerate,duration,w,h);
			}
			double time; //num/denom ?
			double framerate;
			double duration;
			Audio_frame *audio;
	};
	class Variable { //pure virtual base type for variable pointers
		public:
			Variable(){connection=nullptr;};
			virtual void init(std::string s)=0;
			virtual ~Variable(){};
			virtual bool connect(Node* target)=0;
			Node* connection;
			bool connectable;
	};
	template <class T> class Variable_type : public Variable {
		public:
			Variable_type(bool _c){connectable=_c;};
			void init(std::string s);
	    		bool connect(Node* target);
			const T& get(const Frame_parameters &frame);
			T value;
	};
	class enum{
	 	 public:
	 	 	 vector<std::string> options;
	 	 	 
	 };


//rotor variable types
	
	class Node { //base type for node pointers
		public:
			virtual ~Node(){
				for (auto v:vars){
					//std::cerr<<"deleting "<<v.first<<" ("<<(*v.second)<<")"<<std::endl;
					delete v.second;
				}
			}
		protected:
			std::unordered_map<std::string,Variable*> vars;
	};
	template <class NT> class Node_type : public Node {
		public:
			virtual const NT& get_output(const Frame_parameters &frame)=0;
			void init(std::map<std::string,std::string> settings){
				for (auto s:settings) {
					if (vars.find(s.first)!=vars.end()){
						vars[s.first]->init(s.second);
						//printf("set %s to %s\n",s.first.c_str(),s.second.c_str());
					}
				};
			}
			bool connect(std::string v,Node *t){
				auto var=vars.find(v);
				if (var!=vars.end()){
					if ((*var).second->connect(t)){
						return true;
					}
				}
				return false;
			}
			template <class IT> Variable_type<IT>* create_inlet(std::string name){
				vars[name]=new Variable_type<IT>(true);
				return (dynamic_cast<Variable_type<IT>*>(vars[name]));
			}
			template <class IT> Variable_type<IT>* create_attribute(std::string name){
				vars[name]=new Variable_type<IT>(false);
				return (dynamic_cast<Variable_type<IT>*>(vars[name]));
			}
	};
	class time: public Node_type<double> {
		public:
			const double &get_output(const Frame_parameters &frame){
				value=frame.time;
				return value;
			}
		private:
			double value;
	};
	class multiply: public Node_type<double> {
		public:
			multiply(){
				inlet=create_inlet<double>("inlet");
				value=create_inlet<double>("value");
			}
			const double &get_output(const Frame_parameters &frame){
				result=inlet->get(frame)*value->get(frame);
				return result;
			}
		private:
			Variable_type<double> *inlet;
			Variable_type<double> *value;
			double result;
	};
class print: public Node_type<std::string> {
		public:
			print(){
				inlet=create_inlet<double>("inlet"); 
			}
			const std::string &get_output(const Frame_parameters &frame){
std::ostringstream out;
	out << inlet->get(frame);
	result=out.str();
				return result;
			}
		private:
			Variable_type<double> *inlet;
			std::string result;
	};

}

//next:: make a couple of nodes that do something
//test them
//make loading and saving functions 
//xml or json?