#pragma once
#include <array>
#include "dbc.hpp"
#include "point.hpp"
#include <algorithm>
#include "matrix.hpp"
#include "pathing.hpp"

namespace lighting {

  struct LightSource {
    int strength = 0;  // lower is better
    int distance = 1;  // higher is farther, in squares
  };

  const int MIN = 40;
  const int MAX = 220;
  const int MID = 140;

  const std::array<int, 10> LEVELS{
    MAX,
    200,
    180,
    160,
    MID,
    120,
    100,
    80,
    60,
    MIN,
  };

  class LightRender {
    public:
    size_t $width;
    size_t $height;
    Matrix $lightmap;
    Pathing $paths;

    LightRender(size_t width, size_t height) :
      $width(width),
      $height(height),
      $lightmap(height, matrix::Row(width, 0)),
      $paths(width, height)
    {}

    void reset_light();
    void set_light_target(const Point &at, int value=0);
    void clear_light_target(const Point &at);
    void path_light(Matrix &walls);
    void light_box(LightSource source, Point from, Point &min_out, Point &max_out);
    int light_level(int level, size_t x, size_t y);
    void render_light(LightSource source, Point at);
    Matrix &lighting() { return $lightmap; }
  };
}