import {z} from 'zod'

export type GetApiStatusPagesArgs = {Accept: string, status_page_type?: ('public' | 'private') | undefined};

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

export const statusPage = z.object({id: z.string().optional(), name: z.string().min(1).max(125).optional(), published_at: z.string().nullable().optional(), status_page_type: z.enum(["public", "private"]).optional(), url: z.string().optional(), type: z.string().optional()});

export const getApiStatusPagesResponse = z.object({offset: z.number().int().optional(), limit: z.number().int().optional(), more: z.boolean().optional(), total: z.number().int().nullable().optional(), status_pages: z.array(statusPage).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
};

/**
 * List Status Pages
 * 
 * GET /status_pages
 */
export const getApiStatusPages = async (args: GetApiStatusPagesArgs, options?: GetApiStatusPagesOptions) => {
const {baseUrl = "https://api.pagerduty.com", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.Accept != null) headers.set("Accept", String(args.Accept))
if (args.status_page_type != null) query.append("status_page_type", String(args.status_page_type))
if (apiKey !== undefined) headers.set("Authorization", apiKey)

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