import findInternal from './findInternal.mjs'
import Queue from './Queue.mjs'
/**
* Returns the first element of an iterable that passes an asynchronous truth test.
*
* The calls to `iteratee` will be performed in a queue to limit the concurrency of these calls.
*
* Whenever a result is found, all the remaining tasks will be cancelled as long
* as they didn't started already. In case of exception in one of the `iteratee` calls the promise
* returned by this function will be rejected with the exception and the remaining pending
* tasks will also be cancelled. In the very specific case where a result is found and an
* already started task throws an exception that exception will be plainly ignored.
*
* @param {Iterable | AsyncIterable} iterable An iterable or async iterable object.
* @param {Function} iteratee A function that will be called with each member of the iterable. It will receive
* three arguments:
* * `value`: The current value to process
* * `index`: The index in the iterable. Will start from 0.
* * `iterable`: The iterable on which the operation is being performed.
* @param {Queue | number} queueOrConcurrency If a queue is specified it will be used to schedule the calls to
* `iteratee`. If a number is specified it will be used as the concurrency of a Queue that will be created
* implicitly for the same purpose.
* @param {boolean} [ordered] If true this function will return on the first element in the iterable
* order for which `iteratee` returned true. If false it will be the first in time.
* @returns {Promise<any | undefined>} A promise that will be resolved with the first found value or rejected if one of the
* `iteratee` calls throws an exception before finding a value. If no value is found it will return `undefined`.
* @example
* import { findLimit, sleep } from 'modern-async'
*
* const array = [1, 2, 3, 4, 5]
* const result = await findLimit(array, async (v) => {
* // these calls will be performed in parallel with a maximum of 3
* // concurrent calls
* await sleep(Math.random() * 10) // waits a random amount of time between 0ms and 10ms
* return v % 2 === 1
* }, 3)
* console.log(result) // prints 1
*/
async function findLimit (iterable, iteratee, queueOrConcurrency, ordered = false) {
const result = (await findInternal(iterable, iteratee, queueOrConcurrency, ordered))[1]
return result
}
export default findLimit