#pragma once

#include <memory>

#include "LayerData.hpp"
#include "LayerVisualisation.hpp"

namespace fmri
{
    class FlatLayerVisualisation : public LayerVisualisation
    {
    public:
        explicit FlatLayerVisualisation(const LayerData &layer, Ordering ordering);

        void render() override;

    private:
        Ordering ordering;
        std::size_t faceCount;
        std::unique_ptr<float[]> vertexBuffer;
        std::unique_ptr<float[]> colorBuffer;
        std::unique_ptr<int[]> indexBuffer;

        static constexpr const std::array<float, 12> NODE_SHAPE = {
                -0.5f, 0, 0.5f,
                0, 0, -0.5f,
                0, 1, 0,
                0.5f, 0, 0.5f
        };
        static constexpr const std::array<int, 12> NODE_FACES = {
                0, 1, 2,
                0, 1, 3,
                0, 2, 3,
                1, 2, 3
        };

        void setVertexPositions(int vertexNo, float *destination);

        // Various functions defining the way the nodes will be aligned.
        void initializeNodePositions();
    };
}