import {z} from 'zod'

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

export const objectVersion = z.object({Index: z.number().int().optional()});

export const swarmSpec = z.object({Name: z.string().optional(), Labels: z.record(z.string(), z.string()).optional(), Orchestration: z.object({TaskHistoryRetentionLimit: z.number().int().optional()}).nullable().optional(), Raft: z.object({SnapshotInterval: z.number().int().optional(), KeepOldSnapshots: z.number().int().optional(), LogEntriesForSlowFollowers: z.number().int().optional(), ElectionTick: z.number().int().optional(), HeartbeatTick: z.number().int().optional()}).optional(), Dispatcher: z.object({HeartbeatPeriod: z.number().int().optional()}).nullable().optional(), CAConfig: z.object({NodeCertExpiry: z.number().int().optional(), ExternalCAs: z.array(z.object({Protocol: z.literal("cfssl").optional(), URL: z.string().optional(), Options: z.record(z.string(), z.string()).optional(), CACert: z.string().optional()})).optional(), SigningCACert: z.string().optional(), SigningCAKey: z.string().optional(), ForceRotate: z.number().int().optional()}).nullable().optional(), EncryptionConfig: z.object({AutoLockManagers: z.boolean().optional()}).optional(), TaskDefaults: z.object({LogDriver: z.object({Name: z.string().optional(), Options: z.record(z.string(), z.string()).optional()}).optional()}).optional()});

export const tLSInfo = z.object({TrustRoot: z.string().optional(), CertIssuerSubject: z.string().optional(), CertIssuerPublicKey: z.string().optional()});

export const joinTokens = z.object({Worker: z.string().optional(), Manager: z.string().optional()});

export const swarm = z.object({ID: z.string().optional(), Version: objectVersion.optional(), CreatedAt: z.string().optional(), UpdatedAt: z.string().optional(), Spec: swarmSpec.optional(), TLSInfo: tLSInfo.optional(), RootRotationInProgress: z.boolean().optional(), DataPathPort: z.number().int().optional(), DefaultAddrPool: z.array(z.string()).optional(), SubnetSize: z.number().int().lte(29).optional(), JoinTokens: joinTokens.optional()}).nullable();

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
};

/**
 * Inspect swarm
 * 
 * GET /swarm
 */
export const getApiSwarm = async (options: GetApiSwarmOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

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