import {z} from 'zod'

export type DspLocationPauseEventDto = {type: string, location_id: string, until_ms?: number | undefined};

export type DspLocationResumeEventDto = {type: string, location_id: string};

export type DspLocationMenuEventDto = {type: string, location_id: string, download_url?: string | undefined};

export type ObjectUpdateDto = {stream_id: string, is_active: boolean};

export type ObjectUpdatesDto = {items: Array<ObjectUpdateDto>, variations: Array<ObjectUpdateDto>, modifiers: Array<ObjectUpdateDto>};

export type DspLocationMenuUpdateEventDto = {type: string, location_id: string, object_updates: ObjectUpdatesDto};

export type DspLocationOrderAcceptedEventDto = {type: string, location_id: string, order_id?: string | undefined, estimated_ready_at_ms?: number | undefined};

export type OrderFailureDetails = {invalid_item_ids: Array<string>, error_message?: string | undefined};

export type DspLocationOrderFailedEventDto = {type: string, location_id: string, order_id?: string | undefined, failure_reason?: ('restaurant_not_accepting_orders' | 'location_not_found' | 'pos_missing_items' | 'items_unavailable' | 'order_validation_error' | 'unknown') | undefined, failure_details?: OrderFailureDetails | undefined};

export type DspLocationOrderUpdateEventDto = {type: string, location_id: string, order_id?: string | undefined, order_status_update?: ('ready_for_pickup' | 'completed') | undefined};

export type DspLocationOrderCanceledEventDto = {type: string, location_id: string, order_id?: string | undefined};

export type CreateApiStreamDspV1EventArgs = {Authorization?: string | undefined, body: DspLocationPauseEventDto | DspLocationResumeEventDto | DspLocationMenuEventDto | DspLocationMenuUpdateEventDto | DspLocationOrderAcceptedEventDto | DspLocationOrderFailedEventDto | DspLocationOrderUpdateEventDto | DspLocationOrderCanceledEventDto};

export type CreateApiStreamDspV1EventOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const createApiStreamDspV1EventResponse = z.object({});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * New Webhook Event (Stream –> DSP via Webhook)
 * 
 * POST /stream-dsp/v1/event
 */
export const createApiStreamDspV1Event = async (args: CreateApiStreamDspV1EventArgs, options: CreateApiStreamDspV1EventOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))

const url = `${baseUrl.replace(/\/+$/, '')}/stream-dsp/v1/event${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiStreamDspV1EventResponse, await res.json())
};