import {
  FieldNameType,
  FieldStateType,
  NamespaceType,
  DirtyCheckFunction,
  TransformEventToValueFunction,
  TransformValueToInputFunction,
} from './common'
import { FIELD_KEY_ERROR, FIELD_KEY_VALID, FIELD_KEY_VALUE } from './constants/field-keys'
import { FIELD_DEFAULT_ERROR } from './constants/field-defaults'

export const checkedEventToValue: TransformEventToValueFunction = (event) => event?.target?.checked

export const defaultEventToValue: TransformEventToValueFunction = (event) => event?.target?.value

export const defaultDirtyCheck: DirtyCheckFunction = (newValue: any, valueOnFocus: any): boolean =>
  newValue !== valueOnFocus

export const defaultValueToInput: TransformValueToInputFunction = (value?: any): any =>
  value !== undefined ? value : ''

/**
 * @deprecated Will be removed in v3.0.0. This is an internal implementation detail.
 */
export const mapFieldValueAndError = (value: any, error?: any): Pick<FieldStateType, 'error' | 'valid' | 'value'> => ({
  [FIELD_KEY_ERROR]: error || FIELD_DEFAULT_ERROR,
  [FIELD_KEY_VALID]: !error,
  [FIELD_KEY_VALUE]: value,
})

export const validateFieldName = (fieldName: FieldNameType) => fieldName?.length > 0

export const validateNamespace = (namespace: NamespaceType) => namespace?.length > 0