// ets_tracing: off

import type * as C from "../core.js"
import * as CatchAll from "./catchAll.js"

/**
 * Returns a new channel that will perform the operations of this one, until failure, and then
 * it will switch over to the operations of the specified fallback channel.
 */
export function orElse_<
  Env,
  Env1,
  InErr,
  InErr1,
  InElem,
  InElem1,
  InDone,
  InDone1,
  OutErr,
  OutErr1,
  OutElem,
  OutElem1,
  OutDone,
  OutDone1
>(
  self: C.Channel<Env, InErr, InElem, InDone, OutErr, OutElem, OutDone>,
  that: C.Channel<Env1, InErr1, InElem1, InDone1, OutErr1, OutElem1, OutDone1>
): C.Channel<
  Env & Env1,
  InErr & InErr1,
  InElem & InElem1,
  InDone & InDone1,
  OutErr | OutErr1,
  OutElem | OutElem1,
  OutDone | OutDone1
> {
  return CatchAll.catchAll_(self, (_) => that)
}

/**
 * Returns a new channel that will perform the operations of this one, until failure, and then
 * it will switch over to the operations of the specified fallback channel.
 *
 * @ets_data_first orElse_
 */
export function orElse<Env1, InErr1, InElem1, InDone1, OutErr1, OutElem1, OutDone1>(
  that: C.Channel<Env1, InErr1, InElem1, InDone1, OutErr1, OutElem1, OutDone1>
) {
  return <Env, InErr, InElem, InDone, OutErr, OutElem, OutDone>(
    self: C.Channel<Env, InErr, InElem, InDone, OutErr, OutElem, OutDone>
  ) => orElse_(self, that)
}