// SPDX-License-Identifier: LGPL-3.0-or-later
#pragma once

#include "tool_base.h"
#include <functional>
#include <vector>

// Return the points of a regular n-gon
// with the centre at (x, y)
// that is modified in the sense that it takes rf,
// which is used to set the radius for each individual point.
// It is rotated by base_angle,
// where 0 starts drawing at the top.
std::vector<std::pair<float, float>>
regular_polygon_mod(int n, std::function<float(int)> rf, int x = 0, int y = 0,
                    float base_angle = 0);

// Return the points of a star
// with n spikes,
// the inner radius r1,
// the outer radius r2
// and the centre (x, y),
// rotated by base_angle.
std::vector<std::pair<float, float>> star(int n, float r1, float r2, int x = 0,
                                          int y = 0, float base_angle = 0);

class star_tool : public tool_base {
public:
  // Initialize a new star tool.
  // It can draw stars with arbitrary number of spikes (however, at least 2).
  // The preview only supports spikes from 3 to 6 and falls back to 5
  // if a spike outside of that range is given.
  star_tool(canvas_buffer &canvas, int spikes = 5);

  void draw(int x0, int y0, int x1, int y1);

  void set_text(std::stringstream &stream);

  void set_spikes(int spikes);

  void set_radius_factor(int radius_factor);

private:
  int spikes;
  float radius_factor = 1.0 / 3.0;
};