"use strict"
var __createBinding =
  (this && this.__createBinding) ||
  (Object.create
    ? function (o, m, k, k2) {
        if (k2 === undefined) k2 = k
        Object.defineProperty(o, k2, {
          enumerable: true,
          get: function () {
            return m[k]
          }
        })
      }
    : function (o, m, k, k2) {
        if (k2 === undefined) k2 = k
        o[k2] = m[k]
      })
var __setModuleDefault =
  (this && this.__setModuleDefault) ||
  (Object.create
    ? function (o, v) {
        Object.defineProperty(o, "default", { enumerable: true, value: v })
      }
    : function (o, v) {
        o["default"] = v
      })
var __importStar =
  (this && this.__importStar) ||
  function (mod) {
    if (mod && mod.__esModule) return mod
    var result = {}
    if (mod != null)
      for (var k in mod)
        if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k))
          __createBinding(result, mod, k)
    __setModuleDefault(result, mod)
    return result
  }
Object.defineProperty(exports, "__esModule", { value: true })
exports.concat = exports.concat_ = void 0
// tracing: off
const C = __importStar(require("../../Cause"))
const Function_1 = require("../../Function")
const O = __importStar(require("../../Option"))
const Ref = __importStar(require("../../Ref"))
const Pull = __importStar(require("../../Stream/Pull"))
const T = __importStar(require("../_internal/effect"))
const M = __importStar(require("../_internal/managed"))
const definitions_1 = require("./definitions")
/**
 * Concatenates the specified stream with this stream, resulting in a stream
 * that emits the elements from this stream and then the elements from the specified stream.
 */
function concat_(self, that) {
  return new definitions_1.Stream(
    M.map_(
      M.let_(
        M.tap_(
          M.bind_(
            M.bind_(
              M.bind_(M.do, "currStream", () => T.toManaged(Ref.makeRef(Pull.end))),
              "switchStream",
              () => M.switchable()
            ),
            "switched",
            () => T.toManaged(Ref.makeRef(false))
          ),
          ({ currStream, switchStream }) =>
            T.toManaged(T.chain_(switchStream(self.proc), currStream.set))
        ),
        "pull",
        ({ currStream, switchStream, switched }) => {
          const go = T.catchAllCause_(T.flatten(currStream.get), (_) =>
            O.fold_(
              C.sequenceCauseOption(_),
              () =>
                T.chain_(Ref.getAndSet_(switched, true), (_) => {
                  if (_) {
                    return Pull.end
                  } else {
                    return T.zipRight_(
                      T.chain_(switchStream(that.proc), currStream.set),
                      go
                    )
                  }
                }),
              (e) => Pull.halt(e)
            )
          )
          return go
        }
      ),
      ({ pull }) => pull
    )
  )
}
exports.concat_ = concat_
/**
 * Concatenates the specified stream with this stream, resulting in a stream
 * that emits the elements from this stream and then the elements from the specified stream.
 */
function concat(that) {
  return (self) => concat_(self, that)
}
exports.concat = concat
//# sourceMappingURL=concat.js.map
