import {z} from 'zod'

export type GetApiServersArgs = {'X-Postmark-Account-Token': string, count: number, offset: number, name?: string | undefined};

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

export const extendedServerInfo = z.object({ID: z.number().int().optional(), Name: z.string().optional(), ApiTokens: z.array(z.string()).optional(), ServerLink: z.string().optional(), Color: z.string().optional(), SmtpApiActivated: z.boolean().optional(), RawEmailEnabled: z.boolean().optional(), DeliveryHookUrl: z.string().optional(), InboundAddress: z.string().optional(), InboundHookUrl: z.string().optional(), BounceHookUrl: z.string().optional(), OpenHookUrl: z.string().optional(), PostFirstOpenOnly: z.boolean().optional(), TrackOpens: z.boolean().optional(), TrackLinks: z.enum(["None", "HtmlAndTextTracking", "HtmlOnlyTracking", "TextOnlyTracking"]).optional(), ClickHookUrl: z.string().optional(), InboundDomain: z.string().optional(), InboundHash: z.string().optional(), InboundSpamThreshold: z.number().int().optional()});

export const serverListingResponse = z.object({TotalCount: z.number().int().optional(), Servers: z.array(extendedServerInfo).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 servers
 * 
 * GET /servers
 */
export const getApiServers = async (args: GetApiServersArgs, options: GetApiServersOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args['X-Postmark-Account-Token'] != null) headers.set("X-Postmark-Account-Token", String(args['X-Postmark-Account-Token']))
if (args.count != null) query.append("count", String(args.count))
if (args.offset != null) query.append("offset", String(args.offset))
if (args.name != null) query.append("name", String(args.name))

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