import { concreteChunkId } from "@tsplus/stdlib/collections/Chunk/definition"

/**
 * Returns the first index for which the given predicate is satisfied after or
 * at some given index.
 *
 * @tsplus static Chunk.Aspects indexWhereFrom
 * @tsplus pipeable Chunk indexWhereFrom
 */
export function indexWhereFrom<A>(from: number, f: Predicate<A>) {
  return (self: Chunk<A>): number => {
    const iterator = concreteChunkId(self)._arrayLikeIterator()
    let next
    let i = 0

    while ((next = iterator.next()) && !next.done) {
      const array = next.value
      const len = array.length
      if (i + len - 1 >= from) {
        let j = 0
        while (j < len) {
          const a = array[j]!
          if (i >= from && f(a)) {
            return i
          }
          j++
          i++
        }
      } else {
        i += len
      }
    }

    return -1
  }
}