import { concreteChunkId } from "@tsplus/stdlib/collections/Chunk/definition"
/**
 * Splits this chunk on the first element that matches this predicate.
 *
 * @tsplus static Chunk.Aspects splitWhere
 * @tsplus pipeable Chunk splitWhere
 */
export function splitWhere<A>(f: Predicate<A>) {
  return (self: Chunk<A>): readonly [Chunk<A>, Chunk<A>] => {
    const iterator = concreteChunkId(self)._arrayLikeIterator()
    let next
    let cont = true
    let i = 0

    while (cont && (next = iterator.next()) && !next.done) {
      const array = next.value
      const len = array.length
      let j = 0
      while (cont && j < len) {
        const a = array[j]!
        if (f(a)) {
          cont = false
        } else {
          i++
          j++
        }
      }
    }

    return self.splitAt(i)
  }
}