import {z} from 'zod'

export type EtcdserverpbWatchCancelRequest = {watch_id?: unknown | undefined};

export type WatchCreateRequestFilterType = 'NOPUT' | 'NODELETE';

export type EtcdserverpbWatchCreateRequest = {filters?: Array<WatchCreateRequestFilterType> | undefined, fragment?: boolean | undefined, key?: string | undefined, prev_kv?: boolean | undefined, progress_notify?: boolean | undefined, range_end?: string | undefined, start_revision?: unknown | undefined, watch_id?: unknown | undefined};

export type EtcdserverpbWatchProgressRequest = Record<string, never>;

export type EtcdserverpbWatchRequest = {cancel_request?: EtcdserverpbWatchCancelRequest | undefined, create_request?: EtcdserverpbWatchCreateRequest | undefined, progress_request?: EtcdserverpbWatchProgressRequest | undefined};

export type CreateApiV3WatchArgs = {body: EtcdserverpbWatchRequest};

export type CreateApiV3WatchOptions = {baseUrl: string, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const protobufAny = z.object({type_url: z.string().optional(), value: z.string().optional()});

export const runtimeStreamError = z.object({details: z.array(protobufAny).optional(), grpc_code: z.number().int().optional(), http_code: z.number().int().optional(), http_status: z.string().optional(), message: z.string().optional()});

export const mvccpbKeyValue = z.object({create_revision: z.string().optional(), key: z.string().optional(), lease: z.string().optional(), mod_revision: z.string().optional(), value: z.string().optional(), version: z.string().optional()});

export const eventEventType = z.enum(["PUT", "DELETE"]);

export const mvccpbEvent = z.object({kv: mvccpbKeyValue.optional(), prev_kv: mvccpbKeyValue.optional(), type: eventEventType.optional()});

export const etcdserverpbResponseHeader = z.object({cluster_id: z.string().optional(), member_id: z.string().optional(), raft_term: z.string().optional(), revision: z.string().optional()});

export const etcdserverpbWatchResponse = z.object({cancel_reason: z.string().optional(), canceled: z.boolean().optional(), compact_revision: z.string().optional(), created: z.boolean().optional(), events: z.array(mvccpbEvent).optional(), fragment: z.boolean().optional(), header: etcdserverpbResponseHeader.optional(), watch_id: z.string().optional()});

export const createApiV3WatchResponse = z.object({error: runtimeStreamError.optional(), result: etcdserverpbWatchResponse.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
};

/**
 * Watch watches for events happening or that have happened. Both input and output
 * are streams; the input stream is for creating and canceling watchers and the output
 * stream sends events. One watch RPC can watch on multiple key ranges, streaming events
 * for several watches at once. The entire event history can be watched starting from the
 * last compaction revision.
 * 
 * POST /v3/watch
 */
export const createApiV3Watch = async (args: CreateApiV3WatchArgs, options: CreateApiV3WatchOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (ApiKey !== undefined) headers.set("Authorization", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v3/watch${query.size > 0 ? `?${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(createApiV3WatchResponse, await res.json())
};