import {z} from 'zod'

export type CreateApiMatrixClientV3RegisterArgs = {kind?: ('guest' | 'user') | undefined, body: {auth?: ({session?: string | undefined, type?: string | undefined} | {[key: string]: unknown}) | undefined, device_id?: string | undefined, inhibit_login?: boolean | undefined, initial_device_display_name?: string | undefined, password?: string | undefined, refresh_token?: boolean | undefined, username?: string | undefined}};

export type CreateApiMatrixClientV3RegisterOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiMatrixClientV3RegisterResponse = z.object({access_token: z.string().optional(), device_id: z.string().optional(), expires_in_ms: z.number().int().optional(), home_server: z.string().optional(), refresh_token: z.string().optional(), user_id: 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
};

/**
 * Register for an account on this homeserver.
 * 
 * POST /_matrix/client/v3/register
 */
export const createApiMatrixClientV3Register = async (args: CreateApiMatrixClientV3RegisterArgs, options?: CreateApiMatrixClientV3RegisterOptions) => {
const {baseUrl = "https://matrix.org", fetch: fetchFn = fetch} = options ?? {}

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

if (args.kind != null) query.append("kind", String(args.kind))

const url = `${baseUrl.replace(/\/+$/, '')}/_matrix/client/v3/register${query.size > 0 ? `?${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(createApiMatrixClientV3RegisterResponse, await res.json())
};