import {z} from 'zod'

export type CreateApiSessionsValidateArgs = {body: {session_token: unknown}};

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

export const uUID4 = z.string();

export const jWTClaims = z.object({subject: uUID4, issued_at: z.string().optional(), expiration: z.string(), audience: z.array(z.string()).optional(), issuer: z.string().optional(), email: z.object({address: z.string().optional(), is_primary: z.boolean().optional(), is_verified: z.boolean().optional()}).optional(), session_id: uUID4, amr: z.array(z.enum(["pwd", "passkey", "otp", "ext:<provider>", "totp", "security_key"])).optional()});

export const createApiSessionsValidateResponse = z.object({is_valid: z.boolean().optional(), expiration_time: z.string().optional(), user_id: z.string().optional(), claims: jWTClaims.optional(), idle_expires_at: z.string().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
};

/**
 * Validate a session
 * 
 * POST /sessions/validate
 */
export const createApiSessionsValidate = async (args: CreateApiSessionsValidateArgs, options?: CreateApiSessionsValidateOptions) => {
const {baseUrl = "https://.hanko.io/admin", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/sessions/validate${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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