import { tweakArray } from "../tweaker/tweakArray"
import { isArray } from "../utils"
import { withErrorPathSegment } from "../utils/errorDiagnostics"
import { type FromSnapshotContext, internalFromSnapshot, registerSnapshotter } from "./fromSnapshot"
import type { SnapshotInOfObject } from "./SnapshotOf"
import { SnapshotterAndReconcilerPriority } from "./SnapshotterAndReconcilerPriority"

function fromArraySnapshot(sn: SnapshotInOfObject<any>, ctx: FromSnapshotContext): any[] {
  const ln = sn.length
  const arr: any[] = new Array(ln)
  for (let i = 0; i < ln; i++) {
    arr[i] = withErrorPathSegment(i, () => internalFromSnapshot(sn[i], ctx))
  }
  return tweakArray(arr, undefined, true)
}

/**
 * @internal
 */
export function registerFromArraySnapshotter() {
  registerSnapshotter(SnapshotterAndReconcilerPriority.Array, (sn, ctx) => {
    if (isArray(sn)) {
      return fromArraySnapshot(sn, ctx)
    }
    return undefined
  })
}