#ifndef GRIDRENDERER_H
#define GRIDRENDERER_H

#include "MyNode.h"

#include <unordered_set>

#include "../misc/Renderable3D.h"
#include "../misc/Shader.h"
#include "../misc/TriangleData.h"

enum class GridRendererColorMode {
	SHOW_NODE_TYPE,
	SHOW_NODE_IMPORTANCE,
};

class GridModel;

class GridRenderer {

private:

	// settings
	GridRendererColorMode colorMode = GridRendererColorMode::SHOW_NODE_IMPORTANCE;
	bool showEdges = true;
	bool showNodes = true;

	struct Color {
		float r,g,b;
		Color() : r(1), g(0), b(0) {;}
		Color(float r, float g, float b) : r(r), g(g), b(b) {;}
	};

	/** node color depending on the node's type. see ctor */
	Color colors[200];

	TriangleData edges;
	TriangleData nodes;
	int lastBuildID = 0;			// to check whether the model has changed

public:

	/** ctor */
	GridRenderer()  {

		colors[GridNode::TYPE_FLOOR] = Color(0.4, 0.4, 0.4);
		colors[GridNode::TYPE_STAIR] = Color(0,0,1);
		colors[GridNode::TYPE_ELEVATOR] = Color(0,0,1);
		colors[GridNode::TYPE_DOOR] = Color(0.0, 0.0, 0.0);

		colors[GridNode::TYPE_OUTDOOR] = Color(0.0, 0.5, 0.0);

	}

	void setNodeColorMode(const GridRendererColorMode mode) {this->colorMode = mode;}
	void setShowEdges(const bool show) {this->showEdges = show;}

	/** render the given grid using GL commands */
	void render(const RenderSettings& rs, GridModel* model);

private:

	void rebuildIfNeeded(GridModel* model);

};

#endif // GRIDRENDERER_H