function memo(getDeps, fn, opts) {
  let deps = opts.initialDeps ?? [];
  let result;
  return () => {
    var _a, _b, _c, _d;
    let depTime;
    if (opts.key && ((_a = opts.debug) == null ? void 0 : _a.call(opts))) depTime = Date.now();
    const newDeps = getDeps();
    const depsChanged = newDeps.length !== deps.length || newDeps.some((dep, index) => deps[index] !== dep);
    if (!depsChanged) {
      return result;
    }
    deps = newDeps;
    let resultTime;
    if (opts.key && ((_b = opts.debug) == null ? void 0 : _b.call(opts))) resultTime = Date.now();
    result = fn(...newDeps);
    if (opts.key && ((_c = opts.debug) == null ? void 0 : _c.call(opts))) {
      const depEndTime = Math.round((Date.now() - depTime) * 100) / 100;
      const resultEndTime = Math.round((Date.now() - resultTime) * 100) / 100;
      const resultFpsPercentage = resultEndTime / 16;
      const pad = (str, num) => {
        str = String(str);
        while (str.length < num) {
          str = " " + str;
        }
        return str;
      };
      console.info(
        `%c⏱ ${pad(resultEndTime, 5)} /${pad(depEndTime, 5)} ms`,
        `
            font-size: .6rem;
            font-weight: bold;
            color: hsl(${Math.max(
          0,
          Math.min(120 - 120 * resultFpsPercentage, 120)
        )}deg 100% 31%);`,
        opts == null ? void 0 : opts.key
      );
    }
    (_d = opts == null ? void 0 : opts.onChange) == null ? void 0 : _d.call(opts, result);
    return result;
  };
}
function notUndefined(value, msg) {
  if (value === void 0) {
    throw new Error(`Unexpected undefined${msg ? `: ${msg}` : ""}`);
  } else {
    return value;
  }
}
const approxEqual = (a, b) => Math.abs(a - b) < 1;
const debounce = (targetWindow, fn, ms) => {
  let timeoutId;
  return function(...args) {
    targetWindow.clearTimeout(timeoutId);
    timeoutId = targetWindow.setTimeout(() => fn.apply(this, args), ms);
  };
};
export {
  approxEqual,
  debounce,
  memo,
  notUndefined
};
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