import {
  type ReqRefDefaults,
  type Request,
  type ResponseToolkit
} from '@hapi/hapi'

import { type FormPayload } from '~/src/server/plugins/engine/types.js'

export interface FormQuery extends Partial<Record<string, string>> {
  /**
   * Allow preview URL direct access without relevant page checks
   */
  force?: string

  /**
   * Redirect location after 'continue' form action
   */
  returnUrl?: string
}

export interface FormParams extends Partial<Record<string, string>> {
  path: string
  slug: string
  state?: FormStatus
}

export interface FormRequestRefs extends Omit<
  ReqRefDefaults,
  'Params' | 'Payload' | 'Query'
> {
  Params: FormParams
  Payload: object | undefined
  Query: FormQuery
}

export interface FormRequestPayloadRefs extends FormRequestRefs {
  Payload: FormPayload
}

export type FormRequest = Request<FormRequestRefs>
export type FormRequestPayload = Request<FormRequestPayloadRefs>
export type FormResponseToolkit = Pick<
  ResponseToolkit,
  'redirect' | 'view' | 'continue'
>

export enum FormAction {
  Continue = 'continue',
  Validate = 'validate',
  Delete = 'delete',
  AddAnother = 'add-another',
  Send = 'send',
  SaveAndExit = 'save-and-exit',
  External = 'external'
}

export enum FormStatus {
  Draft = 'draft',
  Live = 'live'
}

export enum ExternalActions {
  PostcodeLookup = 'postcode-lookup',
  AnotherExternalAction = 'another-external-action'
}