#pragma once

#include "../Network.h"

#include <vector>

#include <sstream>
#include <iomanip>
#include <limits>

namespace NeuralNetwork {
namespace Recurrent {

	/**
	* @author Tomas Cernik (Tom.Cernik@gmail.com)
	* @brief Reccurent model of Artifical neural network
	*/
	class Network: public NeuralNetwork::Network {
		public:

			/**
			 * @brief Constructor for Network
			 * @param _inputSize is number of inputs to network
			 * @param _outputSize is size of output from network
			 * @param hiddenUnits is number of hiddenUnits to be created
			 */
			inline Network(size_t _inputSize, size_t _outputSize,size_t hiddenUnits=0):NeuralNetwork::Network(),inputSize(_inputSize),outputSize(_outputSize), neurons(0),outputs(0) {
				neurons.push_back(new NeuralNetwork::BiasNeuron());

				for(size_t i=0;i<_inputSize;i++) {
					neurons.push_back(new NeuralNetwork::InputNeuron(neurons.size()));
				}

				for(size_t i=0;i<_outputSize;i++) {
					addNeuron();
				}

				for(size_t i=0;i<hiddenUnits;i++) {
					addNeuron();
				}
			};

			/**
			 * @brief Virtual destructor for Network
			 */
			virtual ~Network() {
				for(auto& a:neurons) {
					delete a;
				}
			};

			/**
			 * @brief  This is a function to compute one iterations of network
			 * @param input is input of network
			 * @returns output of network
			 */
			inline virtual std::vector<float> computeOutput(const std::vector<float>& input) override {
				return computeOutput(input,1);
			}

			/**
			 * @brief  This is a function to compute iterations of network
			 * @param input is input of network
			 * @param iterations is number of iterations
			 * @returns output of network
			 */
			std::vector<float> computeOutput(const std::vector<float>& input, unsigned int iterations);

			std::vector<NeuronInterface*>& getNeurons () {
				return neurons;
			}

			using NeuralNetwork::Network::stringify;

			void stringify(std::ostream& out) const override;

			NeuronInterface& addNeuron() {
				neurons.push_back(new Neuron(neurons.size()));
				NeuronInterface *newNeuron=neurons.back();
				for(std::size_t i=0;i<neurons.size();i++) {
					neurons[i]->setInputSize(newNeuron->id+1);
				}
				return *newNeuron;
			}

			/**
			 * @brief  creates new network from joining two
			 * @param r is network that is connected to outputs of this network
			 * @returns network of constructed from two networks
			 */
			NeuralNetwork::Recurrent::Network connectWith(const NeuralNetwork::Recurrent::Network &r) const;

		protected:
			size_t inputSize=0;
			size_t outputSize=0;

			std::vector<NeuronInterface*> neurons;
			std::vector<float> outputs;
	};
}
}