import {z} from 'zod'

export type GetApiV2SecurityRbacOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const roleResourceType = z.object({apiGroup: z.string(), kinds: z.array(z.string()).optional()});

export const v2Permission = z.enum(["INVALID", "READ", "WRITE", "CREATE", "DELETE", "SET_POLICY"]);

export const roleRule = z.object({types: z.array(roleResourceType).optional(), permissions: z.array(v2Permission)});

export const v2Role = z.object({fqn: z.string().optional(), displayName: z.string().optional(), etag: z.string().optional(), description: z.string().optional(), rules: z.array(roleRule).optional()});

export const v2ListRolesResponse = z.object({roles: z.array(v2Role).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
};

/**
 * List all existing roles.
 * 
 * GET /v2/security/rbac
 */
export const getApiV2SecurityRbac = async (options: GetApiV2SecurityRbacOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v2/security/rbac${query.size > 0 ? `?${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(v2ListRolesResponse, await res.json())
};