viseq/src/graph-manager.h

#pragma once


#include "config-node.h"
#include "datatypes.h"
#include "state.h"
#include "vmath.h"
#include "raylib.h"
#include "raymath.h"

#include "nlohmann/json.hpp"

#include "button.h"
#include "midi-node.h"
#include "edge.h"
#include "node.h"

#include <algorithm>
#include <cstdio>
#include <iostream>
#include <iterator>
#include <map>
#include <memory>
#include <ostream>
#include <random>
#include <ranges>
#include <vector>

#include "state-io.h"

using json = nlohmann::json;

using namespace VISEQ::GRAPH::NODES;
using namespace VISEQ::GRAPH::EDGES;

namespace VISEQ::GRAPH {

	class GraphManager : public std::enable_shared_from_this<GraphManager>{
		private:
			NODES::VEC_SPTR_Node nodes;
			EDGES::VEC_SPTR_Edge edges;
			
			EDGES::VEC_WPTR_Edge remove_edges;
			EDGES::VEC_WPTR_Edge split_edges;

			VEC_SPTR_Node selected_nodes;

			std::map<NODES::SPTR_Node, int> counter;

			std::shared_ptr<APP::State> state = APP::State::get();

		public:

			GraphManager() {}

			std::shared_ptr<GraphManager> getPtr(){
				return shared_from_this();
			}

			int getNodesSize(){
				return nodes.size();
			}

			void createMidiNode(Vec2Df position){
				nodes.emplace_back(std::make_shared<MidiNode>(position));
				nodes.back()->update();
			}
			
			void createConfigNode(Vec2Df position){
				nodes.emplace_back(std::make_shared<ConfigNode>(position));
				nodes.back()->update();
			}
			
			void setMidiPortForAll(int number, bool _state){
				for(auto n : nodes){
					if(n->getNodeType() == NodeType::MIDINODE) std::dynamic_pointer_cast<MidiNode>(n)->setMidiPort(number, _state);
				}
			}

			void addNode(SPTR_Node node){
				std::cout << "added node " << node->id << std::endl;
				nodes.insert(nodes.end(), node);
				node->update();
			}
			
			void addConnection(WPTR_Node from, WPTR_Node to){
				EdgeType et = EdgeType::MIDIEDGE;
				if(from.lock()->getNodeType() == NodeType::CONFIGNODE || to.lock()->getNodeType() == NodeType::CONFIGNODE) et = EdgeType::CONFIGEDGE;
				if(from.lock() != to.lock()) {
					edges.emplace_back(std::make_shared<Edge>());
					edges.back()->edgeType = et;
					edges.back()->start = from;
					edges.back()->end = to;
					edges.back()->start_conn = from.lock()->connectors.back();
					edges.back()->end_conn = to.lock()->connectors.back();
					from.lock()->connections.push_back(edges.back());
					to.lock()->connections.push_back(edges.back());
				}
			}
			
			void addToSelection(){
				auto temp_nodes = nodes | RANGE_FILTER([](SPTR_Node n){return n->selected;}) | std::ranges::to<VEC_SPTR_Node>();
				selected_nodes.insert(selected_nodes.end(), temp_nodes.begin(), temp_nodes.end());
			}

			void select(){
				auto temp_nodes = nodes | RANGE_FILTER([](SPTR_Node n){return n->select();}) | std::ranges::to<VEC_SPTR_Node>();
				if(!KEYS_DOWN.shift) selected_nodes.clear();
				selected_nodes.insert(selected_nodes.end(), temp_nodes.begin(), temp_nodes.end());
				std::for_each(selected_nodes.begin(), selected_nodes.end(), [](WPTR_Node n){n.lock()->selected = true;});
			}
			
			void deselect(){
				std::cout << "deselect" << std::endl;
				for(auto s : selected_nodes){
					s->selected = false;
				}
				selected_nodes.clear();
			}

			VEC_SPTR_Node getSelection(){
				return selected_nodes;
			}
	
			void copyNodes(VEC_SPTR_Node _nodes, Vec2Df position){
				for(auto n: _nodes){
					nodes.insert(nodes.end(), std::make_shared<Node>(*n));
					/*if(n->getNodeType() == NodeType::MIDINODE) nodes.insert(nodes.end(), std::make_shared<MidiNode>(*n));*/
					/*if(n->getNodeType() == NodeType::CONFIGNODE) nodes.insert(nodes.end(), std::make_shared<ConfigNode>(*n));*/
					nodes.back()->setPosition(position + nodes.back()->drag_offset);
					nodes.back()->selected = false;
				}
			}
			
			void copyNodes(std::vector<std::shared_ptr<MidiNode>> _nodes, Vec2Df position){
				for(auto n: _nodes){
					nodes.insert(nodes.end(), std::make_shared<MidiNode>(*n));
					nodes.back()->setPosition(position + nodes.back()->drag_offset);
					nodes.back()->selected = false;
				}
			}
		
			VEC_SPTR_Node getCopiesOfSelectedNodes(){
				VEC_SPTR_Node copied_nodes;
				for(auto n : selected_nodes){
					copied_nodes.insert(copied_nodes.end(), std::make_shared<Node>(*n));
					/*if(n->getNodeType() == NodeType::MIDINODE) copied_nodes.insert(copied_nodes.end(), std::make_shared<MidiNode>(*n));*/
					/*if(n->getNodeType() == NodeType::CONFIGNODE) copied_nodes.insert(copied_nodes.end(), std::make_shared<ConfigNode>(*n));*/
					copied_nodes.back()->deselect();
				}
				return copied_nodes;				
			}

			SPTR_Node copyNode(SPTR_Node n, Vec2Df position){
				std::cout << "copy basenode" << std::endl;
				nodes.insert(nodes.end(), std::make_shared<Node>(*n));
				/*if(n->getNodeType() == NodeType::MIDINODE) nodes.insert(nodes.end(), std::make_shared<MidiNode>(*n));*/
				/*if(n->getNodeType() == NodeType::CONFIGNODE) nodes.insert(nodes.end(), std::make_shared<ConfigNode>(*n));*/
				nodes.back()->setPosition(position);
				return nodes.back();
			}
			
			SPTR_Node copyNode(std::shared_ptr<MidiNode> n, Vec2Df position){
				std::cout << "copy midinode" << std::endl;
				nodes.insert(nodes.end(), std::make_shared<MidiNode>(*n));
				nodes.back()->clearConnectors();
				nodes.back()->setPosition(position);
				return nodes.back();
			}
					
			void setNodeMode(int mode){
				for(auto n: nodes){
					n->setMode(mode);
				}
			}

			void reset(){
				counter.clear();
			}
			WPTR_Node getNode(int i){
				return nodes.at(i);
			}
			
			WPTR_Node getFirstNode(){
				return nodes.front();
			}
			
			WPTR_Node getLastNode(){
				return nodes.back();
			}
			
			VEC_WPTR_Node getMidiNodes(){
				return nodes | RANGE_FILTER([](VISEQ::GRAPH::NODES::SPTR_Node n){return n->getNodeType() == NodeType::MIDINODE;}) | std::ranges::to<VEC_WPTR_Node>();
			}

			NODES::SPTR_Node getRandomNode(){
				VEC_SPTR_GraphItem o; 
				std::ranges::sample(nodes, std::back_inserter(o), 1, std::mt19937{std::random_device{}()});
				return std::dynamic_pointer_cast<VISEQ::GRAPH::NODES::Node>(o.front());
			}
			
			EDGES::SPTR_Edge getRandomEdge(){
				VEC_SPTR_GraphItem o; 
				std::ranges::sample(edges, std::back_inserter(o), 1, std::mt19937{std::random_device{}()});
				return std::dynamic_pointer_cast<VISEQ::GRAPH::EDGES::Edge>(o.front());
			}
			
			SPTR_Node getClosestNode(Vec2Df position){
				auto neighbors = nodes | RANGE_FILTER([](SPTR_Node n){ return !n->picked_up;}) | std::ranges::to<VEC_SPTR_Node>();
				std::sort(neighbors.begin(), neighbors.end(), [position](SPTR_Node na, SPTR_Node nb){ return na->position.dist(position) < nb->position.dist(position);});
				return neighbors.front();
			}
			VEC_WPTR_Node getNodesByID(int _id){
				return nodes | RANGE_FILTER([_id](SPTR_Node n){return n->id == _id;}) | std::ranges::to<VEC_WPTR_Node>(); // TODO: Multiple nodes with the same ID? Why not return only one node?
			}
			
			WPTR_Edge lastEdge(){
				return edges.back();
			}

			WPTR_Node next(WPTR_Node current, WPTR_Node last){
				VEC_WPTR_Edge possible_connections = current.lock()->connections | RANGE_FILTER([current](WPTR_Edge c){
						return (c.lock()->getEdgeType() == EdgeType::MIDIEDGE) && ((c.lock()->start.lock() == current.lock() && c.lock()->pass_forward) || (c.lock()->end.lock() == current.lock() && c.lock()->pass_backward));
						}) | std::ranges::to<VEC_WPTR_Edge>();

				if(possible_connections.empty()) return SPTR_Node(nullptr);
				
				int return_path = 0;
				float angle = -1;
				if(current.lock()->distributionMode == Distribution::GEOMETRIC){
					Vec2Df coming_from = (current.lock()->position - last.lock()->position).norm();
					int i = 0;
					for(auto n : possible_connections){
						WPTR_Node next_node = n.lock()->getNextNode(current);
						float angle_v1_v2 = coming_from.norm().dot((next_node.lock()->position - current.lock()->position).norm());
						if(angle_v1_v2 > angle) {
							return_path = i;
							angle = angle_v1_v2;
						}
						++i;
					}
				}

				if(current.lock()->distributionMode == Distribution::ROUNDROBIN){
					if(counter.find(current.lock()) == counter.end()) {
						counter[current.lock()] = 0;
					} else {
						counter[current.lock()] = (counter[current.lock()] + 1) % possible_connections.size();
						return_path = counter[current.lock()];
					}
				}
				
				if(current.lock()->distributionMode == Distribution::RANDOM){
					return_path = rand() % possible_connections.size();
				}
				
				return possible_connections.at(return_path).lock()->getNextNode(current);
			}

			void splitEdge(SPTR_Edge edge){
				split_edges.push_back(edge);
			}
			
			void splitEdges(){
				for(auto s : split_edges){
					Vec2Df center = s.lock()->end.lock()->position.center(s.lock()->start.lock()->position);
					SPTR_Node cn = copyNode(std::dynamic_pointer_cast<MidiNode>(s.lock()->start.lock()), center); // TODO: copy connectors
					addConnection(s.lock()->start.lock(), cn);
					addConnection(cn, s.lock()->end.lock());
					remove_edges.push_back(s);
				}
				split_edges.clear();
			}
			
			void removeEdge(SPTR_Edge edge){
				remove_edges.push_back(edge);
			}

			void removeEdges(){
				for(auto edge : remove_edges){
					edge.lock()->start.lock()->removeConnector(edge.lock()->start_conn);
					edge.lock()->end.lock()->removeConnector(edge.lock()->end_conn);
					std::erase(edge.lock()->start.lock()->connections, edge.lock());
					std::erase(edge.lock()->end.lock()->connections, edge.lock());
					std::erase(edges, edge.lock());	
				}
				remove_edges.clear();
			}

			VEC_WPTR_Node getAdjacentNodes(VEC_SPTR_Node selected_nodes){
				for(auto n : nodes){
					n->highlighted = false;
				}

				auto erase_connections = edges | RANGE_FILTER([selected_nodes](SPTR_Edge c){ return std::ranges::contains(selected_nodes, c->start.lock()) || std::ranges::contains(selected_nodes, c->end.lock());});
				
				VEC_WPTR_Node adjacent_nodes;
				for(auto c : erase_connections){
					if(!c->start.lock()->selected) adjacent_nodes.push_back(c->start);
					if(!c->end.lock()->selected) adjacent_nodes.push_back(c->end);
				}

				return adjacent_nodes;
			}

			void removeNodesAndEdges(VEC_SPTR_Node selected_nodes){
				VEC_WPTR_Node adjacent_nodes = getAdjacentNodes(selected_nodes);

				for(auto n : adjacent_nodes){
					std::erase_if(n.lock()->connections, [n, selected_nodes](VISEQ::GRAPH::EDGES::WPTR_Edge c){ return std::ranges::contains(selected_nodes, c.lock()->start.lock()) || std::ranges::contains(selected_nodes, c.lock()->end.lock());});
				}
				
				for(auto n : selected_nodes){
					std::erase_if(this->edges, [n](WPTR_Edge c){ return c.lock()->start.lock() == n || c.lock()->end.lock() == n;});
				}

				std::erase_if(this->nodes, [selected_nodes](SPTR_Node n){ return std::ranges::contains(selected_nodes, n);});
			}

			void pasteNodesAndEdges(VEC_SPTR_Node nodes, Vec2Df position){

				VEC_SPTR_Edge copy_connections;
				for(auto c : edges){
					if(std::ranges::contains(nodes, c->start.lock()) && std::ranges::contains(nodes, c->end.lock())) {
						copy_connections.push_back(std::make_shared<Edge>(*c));
					}
				}
				std::cout << copy_connections.size() << std::endl;

				for(auto old_node : nodes){
					SPTR_Node new_node;

					if(old_node->getNodeType() == NodeType::MIDINODE) {
						new_node = copyNode(std::dynamic_pointer_cast<MidiNode>(old_node), position + old_node->drag_offset);
					} else {
						new_node = copyNode(old_node, position + old_node->drag_offset);
					}

					new_node->copied = false;
					new_node->selected = true;
					
					//TODO copy connectors 

					for(auto c : copy_connections){
						if(c->start.lock() == old_node) {
							c->start = new_node;
							c->start.lock()->connections.push_back(c);
						}
						if(c->end.lock() == old_node) {
							c->end = new_node;
							c->end.lock()->connections.push_back(c);
						}
					}
				}
				std::ranges::copy(copy_connections.begin(), copy_connections.end(), std::back_inserter(edges));
			}
			
			void update(){
				if(!remove_edges.empty()) removeEdges();
				if(!split_edges.empty()) splitEdges();
			}

			void drawEdges(Vec2Df mouse_pos, Camera2D cam){
				for(auto c : edges){
					Vec2Df v1_position = c->start.lock()->position - ((c->start.lock()->position - c->end.lock()->position)).norm() * (c->start.lock()->radius + c->connector_offset);
					Vec2Df v2_position = c->end.lock()->position - ((c->end.lock()->position - c->start.lock()->position)).norm() * (c->end.lock()->radius + c->connector_offset);
					float v1_v2_distance = v1_position.dist(&v2_position);
					
					if(v1_v2_distance < 100) c->switches_offset = v1_v2_distance/2.3f;
					Vec2Df from_to_handle = c->start.lock()->position - ((c->start.lock()->position - c->end.lock()->position)).norm() * (c->start.lock()->radius + c->switches_offset);
					Vec2Df to_from_handle = c->end.lock()->position - ((c->end.lock()->position - c->start.lock()->position)).norm() * (c->end.lock()->radius + c->switches_offset);
					Vec2Df middle_handle = c->end.lock()->position - ((c->end.lock()->position - c->start.lock()->position))*0.4f;
					Vec2Df middle_handle_2 = c->end.lock()->position - ((c->end.lock()->position - c->start.lock()->position))*0.6f;
					Vec2Df flip_handle = middle_handle + (v1_position - v2_position).norm().orth() * (v1_v2_distance < 120.0f ? Clamp((120.0f - v1_v2_distance)*0.2, 0.f, 20.f) : 1.0f);
					Vec2Df flip_handle_2 = middle_handle_2 + (v1_position - v2_position).norm().orth() * (v1_v2_distance < 120.0f ? Clamp((120.0f - v1_v2_distance)*-0.2, -20.f, 0.f) : 1.0f);
						
					// Dynamic opacity by distance to mouse
					unsigned char opacity = 150.0f - Clamp(middle_handle.dist(mouse_pos), 0.0f, 150.0f);
					unsigned char opacity_from = 250.0f - Clamp(from_to_handle.dist(mouse_pos), 0.0f, 220.0f);
					unsigned char opacity_to = 250.0f - Clamp(to_from_handle.dist(mouse_pos), 0.0f, 220.0f);

					float midi_gate_v1 = 0.0f;
					float midi_gate_v2 = 0.0f; 

					if(c->start.lock()->getNodeType() == NodeType::MIDINODE){
						midi_gate_v1 = Clamp((4.f / 1000.f) * std::dynamic_pointer_cast<MidiNode>(c->start.lock())->getNotes().gate, 1.f, 4.f);
					}
					if(c->end.lock()->getNodeType() == NodeType::MIDINODE){
						midi_gate_v2 = Clamp((4.f / 1000.f) * std::dynamic_pointer_cast<MidiNode>(c->end.lock())->getNotes().gate, 1.f, 4.f);
					}
					// Line with small connector circles
					if(c->end.lock()->getNodeType() == NodeType::MIDINODE && c->start.lock()->getNodeType() == NodeType::MIDINODE){

						Color col = {229, 181, 103, 255};
						if(c->GActive()) col = {108, 153, 187, 255};
						DrawLine(v1_position.x, v1_position.y, v2_position.x, v2_position.y, col);
						{
							float d = c->start.lock()->position.dist(c->end.lock()->position);
							std::string frac = MIDI::Fractions.at(std::clamp<int>(round(d/60) - 1, 0, 31));
							Vector2 text_length = MeasureTextEx(GetFontDefault(), std::format("{:.1f}",d).c_str(), 10.0f, 2.0f); 
							Vector2 text_length_frac = MeasureTextEx(GetFontDefault(), frac.c_str(), 10.0f, 2.0f); 
							
							Vec2Df middle_handle = c->start.lock()->position + (c->end.lock()->position - c->start.lock()->position) * ((d - text_length.x)*0.5f)/d;
							Vec2Df middle_handle_frac = c->start.lock()->position + (c->end.lock()->position - c->start.lock()->position) * ((d - text_length_frac.x)*0.5f)/d;
							Vec2Df text_position = middle_handle + (c->start.lock()->position - c->end.lock()->position).norm().orth() * 12.0f;
							Vec2Df text_position_frac = middle_handle_frac - (c->start.lock()->position - c->end.lock()->position).norm().orth() * 4.0f;

							float rotation = Vector2Angle((Vector2){1,0}, (c->end.lock()->position - c->start.lock()->position)) * RAD2DEG;
							DrawTextPro(GetFontDefault(), std::format("{:.1f}",d).c_str(), text_position, (Vector2){0,0}, rotation, 10.0f, 2.0f, VS_COLOR_PINK);
							if( (int)d % 60 == 0) DrawTextPro(GetFontDefault(), frac.c_str(), text_position_frac, (Vector2){0,0}, rotation, 10.0f, 2.0f, VS_COLOR_PINK);
						}
						if(midi_gate_v1 == 4.0f) col = VS_COLOR_RED;
						DrawCircle(v1_position.x, v1_position.y, midi_gate_v1, col);
						
						col = {229, 181, 103, 255};
						if(midi_gate_v2 == 4.0f) col = VS_COLOR_RED;
						DrawCircle(v2_position.x, v2_position.y, midi_gate_v2, col);
					
						if(!c->start.lock()->picked_up && !c->end.lock()->picked_up){
							// On/Off switches on both sides
							if(ViButton(mouse_pos, from_to_handle.x, from_to_handle.y, 8.0f, c->pass_forward ? (Color){120, 210, 115, opacity_from} : (Color){232, 50, 32, opacity_from} )) c->pass_forward = !c->pass_forward;
							if(ViButton(mouse_pos, to_from_handle.x, to_from_handle.y, 8.0f, c->pass_backward ? (Color){120, 210, 115, opacity_to} : (Color){232, 50, 32, opacity_to} )) c->pass_backward = !c->pass_backward;

							if(!c->pass_forward){
								Vec2Df block_point1 = (v1_position - v2_position).norm().orth()*4.0f + from_to_handle;
								Vec2Df block_point2 = (v1_position - v2_position).norm().orth()*-4.0f + from_to_handle;
								DrawLineEx(block_point1, block_point2, 2.0f, (Color){232,232,232,opacity_from});
							}
							
							if(!c->pass_backward){
								Vec2Df block_point1 = (v1_position - v2_position).norm().orth()*4.0f + to_from_handle;
								Vec2Df block_point2 = (v1_position - v2_position).norm().orth()*-4.0f + to_from_handle;
								DrawLineEx(block_point1, block_point2, 2.0f, (Color){232,232,232,opacity_to});
							}
							
							if(ViButton(mouse_pos, flip_handle_2.x, flip_handle_2.y, 8.0f, (Color){232, 125, 62, opacity} )) splitEdge(c);
						}
					}
					if(c->start.lock()->getNodeType() == NodeType::CONFIGNODE || c->end.lock()->getNodeType() == NodeType::CONFIGNODE){
						DrawLine(v1_position.x, v1_position.y, v2_position.x, v2_position.y, VS_COLOR_BLUE);
					}

					if(ViButton(mouse_pos, flip_handle.x, flip_handle.y, 8.0f, (Color){232, 50, 32, opacity} )) removeEdge(c);
				}
			}

			void drawNeighborLines(SPTR_Node node, Vec2Df mouse_pos, Camera2D camera){
				float min_d = 480;
				auto neighbors_local = nodes | RANGE_FILTER([mouse_pos](SPTR_Node n){ return !n->picked_up && !n->selected && n->position.dist(mouse_pos) < 960;}) | std::ranges::to<VEC_SPTR_Node>();
				std::sort(neighbors_local.begin(), neighbors_local.end(), [node, mouse_pos](SPTR_Node na, SPTR_Node nb){ return na->position.dist(mouse_pos) < nb->position.dist(mouse_pos);});
				if(!neighbors_local.empty()){
					min_d = neighbors_local.front()->position.dist(mouse_pos);
					DrawCircleLinesV(neighbors_local.front()->position, 22.0f, VS_COLOR_PINK);
					node->neighbors = neighbors_local | std::ranges::views::filter([mouse_pos, min_d](SPTR_Node n){return abs(n->position.dist(mouse_pos) - min_d) < 5;}) | std::ranges::to<VEC_SPTR_Node>();
					for(auto nb : node->neighbors){
						DrawCircleLinesV(nb->position, 20.0f, VS_COLOR_RED);
						float d = nb->position.dist(mouse_pos);
						float dn = nb->position.dist(node->position);
						if(d > 0 && d < min_d*1.5 && d < 960) {
							std::string frac = MIDI::Fractions.at(std::clamp<int>(round(dn/60) - 1, 0, 31));
							Vector2 text_length = MeasureTextEx(GetFontDefault(), std::format("{:.1f}",dn).c_str(), 10.0f, 2.0f); 
							Vector2 text_length_frac = MeasureTextEx(GetFontDefault(), frac.c_str(), 10.0f, 2.0f); 
							
							Vec2Df middle_handle = nb->position + (node->position - nb->position) * ((dn - text_length.x)*0.5f)/dn;
							Vec2Df middle_handle_frac = nb->position + (node->position - nb->position) * ((dn - text_length_frac.x)*0.5f)/dn;
							Vec2Df text_position = middle_handle + (nb->position - node->position).norm().orth() * 12.0f;
							Vec2Df text_position_frac = middle_handle_frac - (nb->position - node->position).norm().orth() * 4.0f;

							float rotation = Vector2Angle((Vector2){1,0}, (node->position - nb->position)) * RAD2DEG;
							DrawTextPro(GetFontDefault(), std::format("{:.1f}",dn).c_str(), text_position, (Vector2){0,0}, rotation, 10.0f, 2.0f, VS_COLOR_PINK);
							if(IsKeyDown(KEY_LEFT_SHIFT)) DrawTextPro(GetFontDefault(), frac.c_str(), text_position_frac, (Vector2){0,0}, rotation, 10.0f, 2.0f, VS_COLOR_PINK);
							Vec2Df n_position = node->position - ((node->position - nb->position)).norm() * 20.0f;
							Vec2Df nb_position = nb->position - ((nb->position - node->position)).norm() * 20.0f;
							DrawLineV(n_position, nb_position, VS_COLOR_PINK);
						}
					}
				}
			}

			void drawNodes(Vec2Df mouse_pos, Camera2D camera){
				for(auto n : nodes){
					if(KEYS_PRESSED.ctrl && n->hovering()) state->selection_origin = n->position;
				}
				BASE::Interactable::z_hovering = -1;
				for(auto n : nodes){
					n->update();
					if(n->picked_up) drawNeighborLines(n, mouse_pos, camera);
					n->draw(mouse_pos, camera);
				}
			}

			NLOHMANN_DEFINE_TYPE_INTRUSIVE(GraphManager, nodes, edges, selected_nodes)
	};

}