import {z} from 'zod'

export type EndpointType = 'email_address' | 'phone_number';

export type GetApiV1EndpointsArgs = {type?: EndpointType | undefined};

export type GetApiV1EndpointsOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const stringId = z.string();

export const emailAddress = z.object({email_address: z.object({id: stringId, internal_email_address: z.string(), spf_email: z.string().optional()})});

export const phoneNumberString = z.string();

export const phoneNumber = z.object({phone_number: z.object({phone_number: phoneNumberString, id: stringId})});

export const endpoint = z.union([emailAddress, phoneNumber]);

export const paging = z.object({cursors: z.object({after: z.string().optional(), before: z.string().optional()}), next_page: z.string().optional(), prev_page: z.string().optional()});

export const getApiV1EndpointsResponse = z.object({data: z.array(endpoint), paging: paging.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
};

/**
 * Get a list of endpoints.
 * 
 * GET /v1/endpoints
 * 
 * Also accepts auth: BearerAuth
 */
export const getApiV1Endpoints = async (args: GetApiV1EndpointsArgs, options: GetApiV1EndpointsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.type != null) query.append("type", String(args.type))
if (ApiKeyAuth !== undefined) headers.set("Authorization", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/endpoints${query.size > 0 ? `?${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(getApiV1EndpointsResponse, await res.json())
};