#pragma once

#include "connection.h"
#include "node-manager.h"
#include "raylib.h"
#include <map>
#include <vector>

class ConnectionManager{

	public:

		ConnectionManager(NodeManager *nm) : nm(nm) {}

		NodeManager *nm;

		std::vector<Connection> connections;

		std::map<int, int> counter;

		void reset(){
			counter.clear();
		}

		int next(int current, int last){
			std::vector<Connection*> possible_connections;
			std::vector<int> next_node_ids;

			for(auto& c : connections){
				if((c.node_id_start == current && c.v1_v2) || (c.node_id_end == current && c.v2_v1)) {
					c.active = false;
					possible_connections.push_back(&c);
					next_node_ids.push_back( c.node_id_start == current ? c.node_id_end : c.node_id_start );
				}
			}

			if(possible_connections.empty()) return -1;
			
			int return_path = 0;
			float angle = -1;
			if(nm->nodes.at(current).distributionMode == Distribution::GEOMETRIC){
				Vec2D<float> coming_from = (nm->nodes.at(current).position - nm->nodes.at(last).position).norm();
				int i = 0;
				for(auto n : possible_connections){
					int next_position = n->node_id_start == current ? n->node_id_end : n->node_id_start;
					float angle_v1_v2 = coming_from.norm().dot((nm->nodes.at(next_position).position - nm->nodes.at(current).position).norm());
					if(angle_v1_v2 > angle) {
						return_path = i;
						angle = angle_v1_v2;
					}
					++i;
				}
			}

			if(nm->nodes.at(current).distributionMode == Distribution::ROUNDROBIN){
				if(counter.find(current) == counter.end()) {
					counter[current] = 0;
				} else {
					counter[current] = (counter[current] + 1) % possible_connections.size();
					return_path = counter[current];
				}
			}
			
			if(nm->nodes.at(current).distributionMode == Distribution::RANDOM){
				return_path = rand() % possible_connections.size();
			}
			
			possible_connections.at(return_path)->active = true;
			return possible_connections.at(return_path)->node_id_start == current ? possible_connections.at(return_path)->node_id_end : possible_connections.at(return_path)->node_id_start;
		}

		void addConnection(int from, int to){
			connections.emplace_back(nm, from, to);
		}

		void splitConnection(Connection *c){
			Vec2D<float> center = c->node_start->position.center(c->node_end->position);
			
		}

		void drawConnections(Vec2D<float> *mouse_pos, Camera2D *cam){
			std::erase_if(connections, [](Connection c){ return c.remove == true;});
			for(auto& c : connections){
				if(c.split) splitConnection(&c);
				c.draw(mouse_pos, cam);
			}
		}
};