//
// Created by petr on 4/4/20.
//

#ifndef RAYMARCHING_CSGTREE_H
#define RAYMARCHING_CSGTREE_H

#include <glm/vec3.hpp>
#include <memory>
#include <vector>

struct CSGRawData {
  virtual std::vector<uint8_t> getRaw()=0;
  virtual ~CSGRawData() = default;
};

struct Operation : public CSGRawData {
  virtual ~Operation() = default;
};

struct OperationUnion : public Operation {
  std::vector<uint8_t> getRaw() override;
};

struct Shape : public CSGRawData {
  explicit Shape(const glm::vec3 &position) : position(position) {}
  glm::vec3 position;
};

struct BoxShape : public Shape {
  BoxShape(const glm::vec3 &position, const glm::vec3 &dimensions) : Shape(position), dimensions(dimensions) {}
  glm::vec3 dimensions;
  std::vector<uint8_t> getRaw() override { return std::vector<uint8_t>(); }
};

class CSGNode {
public:
  [[nodiscard]] virtual auto getLeftChild() -> CSGNode & = 0;
  [[nodiscard]] virtual auto getRightChild() -> CSGNode & = 0;
  [[nodiscard]] virtual auto isLeaf() const -> bool = 0;

  virtual ~CSGNode() = default;
};


class OperationCSGNode : public CSGNode {
public:
  auto getLeftChild() -> CSGNode & override;
  auto getRightChild() -> CSGNode & override;
  [[nodiscard]] auto isLeaf() const -> bool override;

private:
  std::unique_ptr<CSGNode> leftChild;
  std::unique_ptr<CSGNode> rightChild;
  std::unique_ptr<Operation> operation;
};


class ShapeCSGNode : public CSGNode {
public:
  auto getLeftChild() -> CSGNode & override;
  auto getRightChild() -> CSGNode & override;
  [[nodiscard]] auto isLeaf() const -> bool override;

private:
  std::unique_ptr<Shape> shape;
};

class CSGTree {};

#endif // RAYMARCHING_CSGTREE_H