import {z} from 'zod'

export type GetApiApi10StatusArgs = {'X-Partner-Id': string};

export type GetApiApi10StatusOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const operationalStatus = z.enum(["up", "minor_outage", "major_outage"]);

export const endpointStatus = z.object({endpoint: z.string().optional(), status: operationalStatus.optional(), updated_at: z.string().optional(), since: z.string().optional(), reason: z.string().optional()});

export const groupStatus = z.object({group: z.string().optional(), status: operationalStatus.optional(), updated_at: z.string().optional(), since: z.string().optional(), reason: z.string().optional(), endpoints: z.array(endpointStatus).optional()});

export const statusResponse = z.object({data: z.array(groupStatus).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
};

/**
 * Retrieve API status
 * 
 * GET /api/1.0/status
 */
export const getApiApi10Status = async (args: GetApiApi10StatusArgs, options?: GetApiApi10StatusOptions) => {
const {baseUrl = "https://partnerships-status.booking.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args['X-Partner-Id'] != null) headers.set("X-Partner-Id", String(args['X-Partner-Id']))

const url = `${baseUrl.replace(/\/+$/, '')}/api/1.0/status${query.size > 0 ? `?${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(statusResponse, await res.json())
};