import {z} from 'zod'

export type GetApiV0NotificationsArgs = {created_before?: string | undefined, created_after?: string | undefined, status?: ('NEW' | 'ACKNOWLEDGED') | undefined, occurred_before?: string | undefined, occurred_after?: string | undefined, notification_type?: string | undefined, subject?: string | undefined, additional_provider_filter?: string | undefined, limit?: number | undefined};

export type GetApiV0NotificationsOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const notificationResponse = z.object({notification_id: z.string().optional(), created_datetime: z.string().optional(), event_datetime: z.string().optional(), payload_schema: z.string().optional(), notification_type: z.string().optional(), subject_type: z.string().optional(), subject: z.string().optional(), additional_provider_filter: z.string().optional(), status: z.enum(["NEW", "ACKNOWLEDGED"]).optional(), payload: z.record(z.string(), z.unknown()).optional()});

export const getApiV0NotificationsResponse = z.object({data: z.array(notificationResponse).optional()});

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
};

/**
 * Receive notifications API - Get any unacknowledged notifications
 * 
 * GET /v0/notifications
 */
export const getApiV0Notifications = async (args: GetApiV0NotificationsArgs, options?: GetApiV0NotificationsOptions) => {
const {baseUrl = "https://businessgateway.landregistry.gov.uk/bg2/api", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.created_before != null) query.append("created_before", String(args.created_before))
if (args.created_after != null) query.append("created_after", String(args.created_after))
if (args.status != null) query.append("status", String(args.status))
if (args.occurred_before != null) query.append("occurred_before", String(args.occurred_before))
if (args.occurred_after != null) query.append("occurred_after", String(args.occurred_after))
if (args.notification_type != null) query.append("notification_type", String(args.notification_type))
if (args.subject != null) query.append("subject", String(args.subject))
if (args.additional_provider_filter != null) query.append("additional_provider_filter", String(args.additional_provider_filter))
if (args.limit != null) query.append("limit", String(args.limit))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v0/notifications${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

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

return validateResponse(getApiV0NotificationsResponse, await res.json())
};