"use strict";
Object.defineProperties(exports, { __esModule: { value: true }, [Symbol.toStringTag]: { value: "Module" } });
function speedometer(samplesCount, min) {
  samplesCount = samplesCount || 10;
  const bytes = new Array(samplesCount);
  const timestamps = new Array(samplesCount);
  let head = 0;
  let tail = 0;
  let firstSampleTS;
  min = min !== void 0 ? min : 1e3;
  return function push(chunkLength) {
    const now = Date.now();
    const startedAt = timestamps[tail];
    if (!firstSampleTS) {
      firstSampleTS = now;
    }
    bytes[head] = chunkLength;
    timestamps[head] = now;
    let i = tail;
    let bytesCount = 0;
    while (i !== head) {
      bytesCount += bytes[i++];
      i = i % samplesCount;
    }
    head = (head + 1) % samplesCount;
    if (head === tail) {
      tail = (tail + 1) % samplesCount;
    }
    if (now - firstSampleTS < min) {
      return;
    }
    const passed = startedAt && now - startedAt;
    return passed ? Math.round(bytesCount * 1e3 / passed) : void 0;
  };
}
exports.default = speedometer;
