import { get } from "es-toolkit/compat"

import type { ExtractRecordPaths, RecordPathValue, RecordValue } from "./types"
import { useRecord } from "./use-record"

export type UseFieldValueOptions<
  TRecord extends RecordValue = RecordValue,
  TSource extends ExtractRecordPaths<TRecord> = ExtractRecordPaths<TRecord>,
> = {
  defaultValue?: RecordPathValue<TRecord, TSource>
  record?: TRecord | null
  source: TSource
}

/** Reads a direct or nested field from a record override or context. */
export function useFieldValue<
  TRecord extends RecordValue = RecordValue,
  TSource extends ExtractRecordPaths<TRecord> = ExtractRecordPaths<TRecord>,
>({
  defaultValue,
  record: fallbackRecord,
  source,
}: UseFieldValueOptions<TRecord, TSource>):
  | RecordPathValue<TRecord, TSource>
  | undefined {
  const record = useRecord({ record: fallbackRecord })
  return get(record, source, defaultValue) as
    | RecordPathValue<TRecord, TSource>
    | undefined
}