import {z} from 'zod'

export type FcfAuthentication = {name?: string | undefined, attributes: {[key: string]: unknown}, roles: Array<string>};

export type TemporalUnit = {duration?: Duration | undefined, durationEstimated?: boolean | undefined, dateBased?: boolean | undefined, timeBased?: boolean | undefined};

export type Duration = {units?: Array<TemporalUnit> | undefined, positive?: boolean | undefined, zero?: boolean | undefined, negative?: boolean | undefined, seconds?: number | undefined, nano?: number | undefined};

export type DatabaseSession = {authentication?: (FcfAuthentication | null) | undefined, id?: string | undefined, creationTime?: string | undefined, expires?: string | undefined, expired?: boolean | undefined, lastAccessedTime?: string | undefined, maxInactiveInterval?: Duration | undefined, new?: boolean | undefined, modified?: boolean | undefined, modifiedTime?: string | undefined};

export type GetApiAuthInfoArgs = {requestSession?: (DatabaseSession | null) | undefined, originPath?: (string | null) | undefined, utmSource?: (string | null) | undefined, utmMedium?: (string | null) | undefined, utmCampaign?: (string | null) | undefined};

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

export const fcfAuthentication = z.object({name: z.string().optional(), attributes: z.record(z.string(), z.unknown()), roles: z.array(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
};

/**
 * GET /auth/info
 */
export const getApiAuthInfo = async (args: GetApiAuthInfoArgs, options: GetApiAuthInfoOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.requestSession != null) query.append("requestSession", JSON.stringify(args.requestSession))
if (args.originPath != null) query.append("originPath", String(args.originPath))
if (args.utmSource != null) query.append("utmSource", String(args.utmSource))
if (args.utmMedium != null) query.append("utmMedium", String(args.utmMedium))
if (args.utmCampaign != null) query.append("utmCampaign", String(args.utmCampaign))

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