"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.throttleShapeM = throttleShapeM;
exports.throttleShapeM_ = throttleShapeM_;

var CL = /*#__PURE__*/_interopRequireWildcard( /*#__PURE__*/require("../../Clock/index.cjs"));

var Tp = /*#__PURE__*/_interopRequireWildcard( /*#__PURE__*/require("../../Collections/Immutable/Tuple/index.cjs"));

var _index3 = /*#__PURE__*/require("../../Function/index.cjs");

var O = /*#__PURE__*/_interopRequireWildcard( /*#__PURE__*/require("../../Option/index.cjs"));

var T = /*#__PURE__*/_interopRequireWildcard( /*#__PURE__*/require("../_internal/effect.cjs"));

var M = /*#__PURE__*/_interopRequireWildcard( /*#__PURE__*/require("../_internal/managed.cjs"));

var Ref = /*#__PURE__*/_interopRequireWildcard( /*#__PURE__*/require("../_internal/ref.cjs"));

var _definitions = /*#__PURE__*/require("./definitions.cjs");

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

// ets_tracing: off

/**
 * Delays the chunks of this stream according to the given bandwidth parameters using the token bucket
 * algorithm. Allows for burst in the processing of elements by allowing the token bucket to accumulate
 * tokens up to a `units + burst` threshold. The weight of each chunk is determined by the `costFn`
 * effectful function.
 */
function throttleShapeM_(self, costFn, units, duration, burst = 0) {
  return new _definitions.Stream(M.map_(M.let_(M.bind_(M.bind_(M.bind_(M.do, "chunks", () => self.proc), "currentTime", () => T.toManaged(CL.currentTime)), "bucket", ({
    currentTime
  }) => T.toManaged(Ref.makeRef(Tp.tuple(units, currentTime)))), "pull", ({
    bucket,
    chunks
  }) => T.map_(T.tap_(T.bind_(T.bind_(T.bind_(T.bind_(T.do, "chunk", () => chunks), "weight", ({
    chunk
  }) => T.mapError_(costFn(chunk), O.some)), "current", () => CL.currentTime), "delay", ({
    current,
    weight
  }) => Ref.modify_(bucket, ({
    tuple: [tokens, timestamp]
  }) => {
    const elapsed = current - timestamp;
    const cycles = elapsed / duration;

    const available = (() => {
      const sum = tokens + cycles * units;
      const max = units + burst < 0 ? Number.MAX_VALUE : units + burst;
      return sum < 0 ? max : Math.min(sum, max);
    })();

    const remaining = available - weight;
    const waitCycles = remaining >= 0 ? 0 : -remaining / units;
    const delay = waitCycles * duration;
    return Tp.tuple(delay, Tp.tuple(remaining, current));
  })), ({
    delay
  }) => T.when_(CL.sleep(delay), () => delay > 0)), ({
    chunk
  }) => chunk)), ({
    pull
  }) => pull));
}
/**
 * Delays the chunks of this stream according to the given bandwidth parameters using the token bucket
 * algorithm. Allows for burst in the processing of elements by allowing the token bucket to accumulate
 * tokens up to a `units + burst` threshold. The weight of each chunk is determined by the `costFn`
 * effectful function.
 *
 * @ets_data_first throttleShapeM_
 */


function throttleShapeM(costFn, units, duration, burst = 0) {
  return self => throttleShapeM_(self, costFn, units, duration, burst);
}
//# sourceMappingURL=throttleShapeM.cjs.map