import {z} from 'zod'

export type GetApiAdmissionRulesArgs = {'X-Auth-Token': string, scope?: ('fed' | 'local') | undefined};

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

export const rESTAdmRuleCriterion: z.ZodType<RESTAdmRuleCriterion> = z.object({name: z.string(), op: z.string(), value: z.string(), sub_criteria: z.array(z.lazy(() => rESTAdmRuleCriterion)).optional()});

export const rESTAdmissionRule = z.object({id: z.number().int(), category: z.string(), comment: z.string(), criteria: z.array(rESTAdmRuleCriterion), disable: z.boolean(), critical: z.boolean(), cfg_type: z.string(), rule_type: z.string()});

export const rESTAdmissionRulesData = z.object({rules: z.array(rESTAdmissionRule)});

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 admission rules
 * 
 * GET /admission/rules
 */
export const getApiAdmissionRules = async (args: GetApiAdmissionRulesArgs, options: GetApiAdmissionRulesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args['X-Auth-Token'] != null) headers.set("X-Auth-Token", String(args['X-Auth-Token']))
if (args.scope != null) query.append("scope", String(args.scope))

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