const timers = new Map();

export const EPSILON = 2.23e-16;

export const debounce = async (fn, delayMs) => {
  const timer = timers.get(fn);
  if (timer) {
    return timer.result;
  }
  const result = await fn();
  timers.set(fn, { result });
  setTimeout(() => {
    timers.delete(fn);
  }, delayMs);
  return result;
};

export const delay = async (delayMs) => {
  await new Promise((resolve) => {
    setTimeout(resolve, delayMs);
  });
};

export const hexToRGB = (input) => {
  if (input.startsWith('#')) {
    input = input.slice(1);
  }
  const r = parseInt(`${input[0]}${input[1]}`, 16);
  const g = parseInt(`${input[2]}${input[3]}`, 16);
  const b = parseInt(`${input[4]}${input[5]}`, 16);
  return { r, g, b };
};

export const displayNumber = (value) => (value.toString().length > 6 ? value.toFixed(2) : value);