import {z} from 'zod'

export type CreateApiV2AuthnSsoEmailAddressArgs = {emailAddress: string, redirect?: boolean | undefined, 'X-AUTH-REDIRECT-OVERRIDE'?: string | undefined};

export type CreateApiV2AuthnSsoEmailAddressOptions = {baseUrl?: string | undefined, XAuthToken?: string | undefined, fetch?: typeof fetch | undefined};

export const redirectResponse = z.object({redirectUri: z.string()});

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
};

/**
 * Initiate SSO Authentication (Service Provider-Initiated Flow)
 * 
 * POST /v2/authn/sso/{emailAddress}
 */
export const createApiV2AuthnSsoEmailAddress = async (args: CreateApiV2AuthnSsoEmailAddressArgs, options?: CreateApiV2AuthnSsoEmailAddressOptions) => {
const {baseUrl = "https://api.alianza.com", fetch: fetchFn = fetch, XAuthToken} = options ?? {}

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

if (args.redirect != null) query.append("redirect", String(args.redirect))
if (args['X-AUTH-REDIRECT-OVERRIDE'] != null) headers.set("X-AUTH-REDIRECT-OVERRIDE", String(args['X-AUTH-REDIRECT-OVERRIDE']))
if (XAuthToken !== undefined) headers.set("X-AUTH-TOKEN", XAuthToken)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/authn/sso/${encodeURIComponent(String(args.emailAddress))}${query.size > 0 ? `?${query}` : ''}`

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

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

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