// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.

import type { RequestInit, RequestInfo, BodyInit } from './internal/builtin-types';
import type { HTTPMethod, PromiseOrValue, MergedRequestInit, FinalizedRequestInit } from './internal/types';
import { uuid4 } from './internal/utils/uuid';
import { validatePositiveInteger, isAbsoluteURL, safeJSON } from './internal/utils/values';
import { sleep } from './internal/utils/sleep';
export type { Logger, LogLevel } from './internal/utils/log';
import { castToError, isAbortError } from './internal/errors';
import type { APIResponseProps } from './internal/parse';
import { getPlatformHeaders } from './internal/detect-platform';
import * as Shims from './internal/shims';
import * as Opts from './internal/request-options';
import { stringifyQuery } from './internal/utils/query';
import { VERSION } from './version';
import * as Errors from './core/error';
import * as Pagination from './core/pagination';
import {
  AbstractPage,
  type ArrayPageParams,
  ArrayPageResponse,
  type NextFilesPageParams,
  NextFilesPageResponse,
  type ObjectPageParams,
  ObjectPageResponse,
} from './core/pagination';
import * as Uploads from './core/uploads';
import * as API from './resources/index';
import * as TopLevelAPI from './resources/top-level';
import { HealthResponse } from './resources/top-level';
import { APIPromise } from './core/api-promise';
import {
  AccessTokenCreateParams,
  AccessTokenCreateResponse,
  AccessTokenDeleteParams,
  AccessTokenDeleteResponse,
  AccessTokenListParams,
  AccessTokenListResponse,
  AccessTokens,
} from './resources/access-tokens';
import {
  EnvironmentListParams,
  EnvironmentListResponse,
  EnvironmentRetrieveResponse,
  EnvironmentSendMessageParams,
  EnvironmentSendMessageResponse,
  Environments,
} from './resources/environments';
import {
  MessageListParams,
  MessageListResponse,
  MessageRetrieveResponse,
  MessageSearchParams,
  MessageSearchRequest,
  MessageSearchResponse,
  MessageSearchResult,
  Messages,
} from './resources/messages';
import { Passage, PassageSearchParams, PassageSearchResponse, Passages } from './resources/passages';
import { TagListParams, TagListResponse, Tags } from './resources/tags';
import {
  NpmRequirement,
  PipRequirement,
  Tool,
  ToolCreate,
  ToolCreateParams,
  ToolDeleteResponse,
  ToolListParams,
  ToolReturnMessage,
  ToolSearchParams,
  ToolSearchRequest,
  ToolSearchResponse,
  ToolSearchResult,
  ToolType,
  ToolUpdateParams,
  ToolUpsertParams,
  Tools,
  ToolsArrayPage,
} from './resources/tools';
import {
  AgentCreateParams,
  AgentDeleteResponse,
  AgentEnvironmentVariable,
  AgentExportFileParams,
  AgentExportFileResponse,
  AgentImportFileParams,
  AgentImportFileResponse,
  AgentListParams,
  AgentRecompileParams,
  AgentRecompileResponse,
  AgentRetrieveParams,
  AgentState,
  AgentStatesArrayPage,
  AgentType,
  AgentUpdateParams,
  Agents,
  AnthropicModelSettings,
  AzureModelSettings,
  BedrockModelSettings,
  ChildToolRule,
  ConditionalToolRule,
  ContinueToolRule,
  DeepseekModelSettings,
  GoogleAIModelSettings,
  GoogleVertexModelSettings,
  GroqModelSettings,
  InitToolRule,
  JsonObjectResponseFormat,
  JsonSchemaResponseFormat,
  LettaMessageContentUnion,
  MaxCountPerStepToolRule,
  MessageCreate,
  OpenAIModelSettings,
  ParentToolRule,
  RequiredBeforeExitToolRule,
  RequiresApprovalToolRule,
  TerminalToolRule,
  TextResponseFormat,
  TogetherModelSettings,
  XaiModelSettings,
} from './resources/agents/agents';
import {
  Archive,
  ArchiveCreateParams,
  ArchiveListParams,
  ArchiveUpdateParams,
  Archives,
  ArchivesArrayPage,
  VectorDBProvider,
} from './resources/archives/archives';
import {
  BlockCreateParams,
  BlockDeleteResponse,
  BlockListParams,
  BlockResponse,
  BlockResponsesArrayPage,
  BlockUpdateParams,
  Blocks,
  CreateBlock,
} from './resources/blocks/blocks';
import {
  Conversation,
  ConversationCancelParams,
  ConversationCancelResponse,
  ConversationCreateParams,
  ConversationDeleteResponse,
  ConversationForkParams,
  ConversationListParams,
  ConversationListResponse,
  ConversationRecompileParams,
  ConversationRecompileResponse,
  ConversationUpdateParams,
  Conversations,
  CreateConversation,
  UpdateConversation,
} from './resources/conversations/conversations';
import {
  Folder,
  FolderCreateParams,
  FolderDeleteResponse,
  FolderListParams,
  FolderUpdateParams,
  Folders,
  FoldersArrayPage,
} from './resources/folders/folders';
import {
  CreateSseMcpServer,
  CreateStdioMcpServer,
  CreateStreamableHTTPMcpServer,
  McpServerCreateParams,
  McpServerCreateResponse,
  McpServerListResponse,
  McpServerRefreshParams,
  McpServerRefreshResponse,
  McpServerRetrieveResponse,
  McpServerUpdateParams,
  McpServerUpdateResponse,
  McpServers,
  SseMcpServer,
  StdioMcpServer,
  StreamableHTTPMcpServer,
  UpdateSseMcpServer,
  UpdateStdioMcpServer,
  UpdateStreamableHTTPMcpServer,
} from './resources/mcp-servers/mcp-servers';
import {
  EmbeddingConfig,
  EmbeddingModel,
  LlmConfig,
  Model,
  ModelListParams,
  ModelListResponse,
  Models,
  ProviderCategory,
  ProviderType,
} from './resources/models/models';
import { Job, RunListParams, Runs, StopReasonType } from './resources/runs/runs';
import { ProviderTrace, Step, StepListParams, Steps, StepsArrayPage } from './resources/steps/steps';
import {
  TemplateCreateParams,
  TemplateCreateResponse,
  TemplateDeleteParams,
  TemplateDeleteResponse,
  TemplateRollbackParams,
  TemplateRollbackResponse,
  TemplateSaveParams,
  TemplateSaveResponse,
  TemplateUpdateParams,
  TemplateUpdateResponse,
  Templates,
} from './resources/templates/templates';
import { type Fetch } from './internal/builtin-types';
import { HeadersLike, NullableHeaders, buildHeaders } from './internal/headers';
import { FinalRequestOptions, RequestOptions } from './internal/request-options';
import { readEnv } from './internal/utils/env';
import {
  type LogLevel,
  type Logger,
  formatRequestDetails,
  loggerFor,
  parseLogLevel,
} from './internal/utils/log';
import { isEmptyObj } from './internal/utils/values';

const environments = {
  cloud: 'https://api.letta.com',
  local: 'http://localhost:8283',
};
type Environment = keyof typeof environments;

export interface ClientOptions {
  /**
   * Defaults to process.env['LETTA_API_KEY'].
   */
  apiKey?: string | null | undefined;

  projectID?: string | null | undefined;

  /**
   * Deprecated, please use project_id instead.
   */
  project?: string | null | undefined;

  /**
   * Specifies the environment to use for the API.
   *
   * Each environment maps to a different base URL:
   * - `cloud` corresponds to `https://api.letta.com`
   * - `local` corresponds to `http://localhost:8283`
   */
  environment?: Environment | undefined;

  /**
   * Override the default base URL for the API, e.g., "https://api.example.com/v2/"
   *
   * Defaults to process.env['LETTA_BASE_URL'].
   */
  baseURL?: string | null | undefined;

  /**
   * The maximum amount of time (in milliseconds) that the client should wait for a response
   * from the server before timing out a single request.
   *
   * Note that request timeouts are retried by default, so in a worst-case scenario you may wait
   * much longer than this timeout before the promise succeeds or fails.
   *
   * @unit milliseconds
   */
  timeout?: number | undefined;
  /**
   * Additional `RequestInit` options to be passed to `fetch` calls.
   * Properties will be overridden by per-request `fetchOptions`.
   */
  fetchOptions?: MergedRequestInit | undefined;

  /**
   * Specify a custom `fetch` function implementation.
   *
   * If not provided, we expect that `fetch` is defined globally.
   */
  fetch?: Fetch | undefined;

  /**
   * The maximum number of times that the client will retry a request in case of a
   * temporary failure, like a network error or a 5XX error from the server.
   *
   * @default 2
   */
  maxRetries?: number | undefined;

  /**
   * Default headers to include with every request to the API.
   *
   * These can be removed in individual requests by explicitly setting the
   * header to `null` in request options.
   */
  defaultHeaders?: HeadersLike | undefined;

  /**
   * Default query parameters to include with every request to the API.
   *
   * These can be removed in individual requests by explicitly setting the
   * param to `undefined` in request options.
   */
  defaultQuery?: Record<string, string | undefined> | undefined;

  /**
   * Set the log level.
   *
   * Defaults to process.env['LETTA_LOG'] or 'warn' if it isn't set.
   */
  logLevel?: LogLevel | undefined;

  /**
   * Set the logger.
   *
   * Defaults to globalThis.console.
   */
  logger?: Logger | undefined;
}

/**
 * API Client for interfacing with the Letta API.
 */
export class Letta {
  apiKey: string | null;
  projectID: string | null;
  project: string | null;

  baseURL: string;
  maxRetries: number;
  timeout: number;
  logger: Logger;
  logLevel: LogLevel | undefined;
  fetchOptions: MergedRequestInit | undefined;

  private fetch: Fetch;
  #encoder: Opts.RequestEncoder;
  protected idempotencyHeader?: string;
  private _options: ClientOptions;

  /**
   * API Client for interfacing with the Letta API.
   *
   * @param {string | null | undefined} [opts.apiKey=process.env['LETTA_API_KEY'] ?? null]
   * @param {string | null | undefined} [opts.projectID]
   * @param {string | null | undefined} [opts.project]
   * @param {Environment} [opts.environment=cloud] - Specifies the environment URL to use for the API.
   * @param {string} [opts.baseURL=process.env['LETTA_BASE_URL'] ?? https://api.letta.com] - Override the default base URL for the API.
   * @param {number} [opts.timeout=1 minute] - The maximum amount of time (in milliseconds) the client will wait for a response before timing out.
   * @param {MergedRequestInit} [opts.fetchOptions] - Additional `RequestInit` options to be passed to `fetch` calls.
   * @param {Fetch} [opts.fetch] - Specify a custom `fetch` function implementation.
   * @param {number} [opts.maxRetries=2] - The maximum number of times the client will retry a request.
   * @param {HeadersLike} opts.defaultHeaders - Default headers to include with every request to the API.
   * @param {Record<string, string | undefined>} opts.defaultQuery - Default query parameters to include with every request to the API.
   */
  constructor({
    baseURL = readEnv('LETTA_BASE_URL'),
    apiKey = readEnv('LETTA_API_KEY') ?? null,
    projectID = null,
    project = null,
    ...opts
  }: ClientOptions = {}) {
    const options: ClientOptions = {
      apiKey,
      projectID,
      project,
      ...opts,
      baseURL,
      environment: opts.environment ?? 'cloud',
    };

    if (baseURL && opts.environment) {
      throw new Errors.LettaError(
        'Ambiguous URL; The `baseURL` option (or LETTA_BASE_URL env var) and the `environment` option are given. If you want to use the environment you must pass baseURL: null',
      );
    }

    this.baseURL = options.baseURL || environments[options.environment || 'cloud'];
    this.timeout = options.timeout ?? Letta.DEFAULT_TIMEOUT /* 1 minute */;
    this.logger = options.logger ?? console;
    const defaultLogLevel = 'warn';
    // Set default logLevel early so that we can log a warning in parseLogLevel.
    this.logLevel = defaultLogLevel;
    this.logLevel =
      parseLogLevel(options.logLevel, 'ClientOptions.logLevel', this) ??
      parseLogLevel(readEnv('LETTA_LOG'), "process.env['LETTA_LOG']", this) ??
      defaultLogLevel;
    this.fetchOptions = options.fetchOptions;
    this.maxRetries = options.maxRetries ?? 2;
    this.fetch = options.fetch ?? Shims.getDefaultFetch();
    this.#encoder = Opts.FallbackEncoder;

    const customHeadersEnv = readEnv('LETTA_CUSTOM_HEADERS');
    if (customHeadersEnv) {
      const parsed: Record<string, string> = {};
      for (const line of customHeadersEnv.split('\n')) {
        const colon = line.indexOf(':');
        if (colon >= 0) {
          parsed[line.substring(0, colon).trim()] = line.substring(colon + 1).trim();
        }
      }
      options.defaultHeaders = { ...parsed, ...options.defaultHeaders };
    }

    this._options = options;

    this.apiKey = apiKey;
    this.projectID = projectID;
    this.project = project;
  }

  /**
   * Create a new client instance re-using the same options given to the current client with optional overriding.
   */
  withOptions(options: Partial<ClientOptions>): this {
    const client = new (this.constructor as any as new (props: ClientOptions) => typeof this)({
      ...this._options,
      environment: options.environment ? options.environment : undefined,
      baseURL: options.environment ? undefined : this.baseURL,
      maxRetries: this.maxRetries,
      timeout: this.timeout,
      logger: this.logger,
      logLevel: this.logLevel,
      fetch: this.fetch,
      fetchOptions: this.fetchOptions,
      apiKey: this.apiKey,
      projectID: this.projectID,
      project: this.project,
      ...options,
    });
    return client;
  }

  /**
   * Check whether the base URL is set to its default.
   */
  #baseURLOverridden(): boolean {
    return this.baseURL !== environments[this._options.environment || 'cloud'];
  }

  /**
   * Liveness endpoint; returns 200 when process is responsive.
   */
  health(options?: RequestOptions): APIPromise<TopLevelAPI.HealthResponse> {
    return this.get('/v1/health/', options);
  }

  protected defaultQuery(): Record<string, string | undefined> | undefined {
    return this._options.defaultQuery;
  }

  protected validateHeaders({ values, nulls }: NullableHeaders) {
    return;
  }

  protected async authHeaders(opts: FinalRequestOptions): Promise<NullableHeaders | undefined> {
    if (this.apiKey == null) {
      return undefined;
    }
    return buildHeaders([{ Authorization: `Bearer ${this.apiKey}` }]);
  }

  protected stringifyQuery(query: object | Record<string, unknown>): string {
    return stringifyQuery(query);
  }

  private getUserAgent(): string {
    return `${this.constructor.name}/JS ${VERSION}`;
  }

  protected defaultIdempotencyKey(): string {
    return `stainless-node-retry-${uuid4()}`;
  }

  protected makeStatusError(
    status: number,
    error: Object,
    message: string | undefined,
    headers: Headers,
  ): Errors.APIError {
    return Errors.APIError.generate(status, error, message, headers);
  }

  buildURL(
    path: string,
    query: Record<string, unknown> | null | undefined,
    defaultBaseURL?: string | undefined,
  ): string {
    const baseURL = (!this.#baseURLOverridden() && defaultBaseURL) || this.baseURL;
    const url =
      isAbsoluteURL(path) ?
        new URL(path)
      : new URL(baseURL + (baseURL.endsWith('/') && path.startsWith('/') ? path.slice(1) : path));

    const defaultQuery = this.defaultQuery();
    const pathQuery = Object.fromEntries(url.searchParams);
    if (!isEmptyObj(defaultQuery) || !isEmptyObj(pathQuery)) {
      query = { ...pathQuery, ...defaultQuery, ...query };
    }

    if (typeof query === 'object' && query && !Array.isArray(query)) {
      url.search = this.stringifyQuery(query);
    }

    return url.toString();
  }

  /**
   * Used as a callback for mutating the given `FinalRequestOptions` object.
   */
  protected async prepareOptions(options: FinalRequestOptions): Promise<void> {}

  /**
   * Used as a callback for mutating the given `RequestInit` object.
   *
   * This is useful for cases where you want to add certain headers based off of
   * the request properties, e.g. `method` or `url`.
   */
  protected async prepareRequest(
    request: RequestInit,
    { url, options }: { url: string; options: FinalRequestOptions },
  ): Promise<void> {}

  get<Rsp>(path: string, opts?: PromiseOrValue<RequestOptions>): APIPromise<Rsp> {
    return this.methodRequest('get', path, opts);
  }

  post<Rsp>(path: string, opts?: PromiseOrValue<RequestOptions>): APIPromise<Rsp> {
    return this.methodRequest('post', path, opts);
  }

  patch<Rsp>(path: string, opts?: PromiseOrValue<RequestOptions>): APIPromise<Rsp> {
    return this.methodRequest('patch', path, opts);
  }

  put<Rsp>(path: string, opts?: PromiseOrValue<RequestOptions>): APIPromise<Rsp> {
    return this.methodRequest('put', path, opts);
  }

  delete<Rsp>(path: string, opts?: PromiseOrValue<RequestOptions>): APIPromise<Rsp> {
    return this.methodRequest('delete', path, opts);
  }

  private methodRequest<Rsp>(
    method: HTTPMethod,
    path: string,
    opts?: PromiseOrValue<RequestOptions>,
  ): APIPromise<Rsp> {
    return this.request(
      Promise.resolve(opts).then((opts) => {
        return { method, path, ...opts };
      }),
    );
  }

  request<Rsp>(
    options: PromiseOrValue<FinalRequestOptions>,
    remainingRetries: number | null = null,
  ): APIPromise<Rsp> {
    return new APIPromise(this, this.makeRequest(options, remainingRetries, undefined));
  }

  private async makeRequest(
    optionsInput: PromiseOrValue<FinalRequestOptions>,
    retriesRemaining: number | null,
    retryOfRequestLogID: string | undefined,
  ): Promise<APIResponseProps> {
    const options = await optionsInput;
    const maxRetries = options.maxRetries ?? this.maxRetries;
    if (retriesRemaining == null) {
      retriesRemaining = maxRetries;
    }

    await this.prepareOptions(options);

    const { req, url, timeout } = await this.buildRequest(options, {
      retryCount: maxRetries - retriesRemaining,
    });

    await this.prepareRequest(req, { url, options });

    /** Not an API request ID, just for correlating local log entries. */
    const requestLogID = 'log_' + ((Math.random() * (1 << 24)) | 0).toString(16).padStart(6, '0');
    const retryLogStr = retryOfRequestLogID === undefined ? '' : `, retryOf: ${retryOfRequestLogID}`;
    const startTime = Date.now();

    loggerFor(this).debug(
      `[${requestLogID}] sending request`,
      formatRequestDetails({
        retryOfRequestLogID,
        method: options.method,
        url,
        options,
        headers: req.headers,
      }),
    );

    if (options.signal?.aborted) {
      throw new Errors.APIUserAbortError();
    }

    const controller = new AbortController();
    const response = await this.fetchWithTimeout(url, req, timeout, controller).catch(castToError);
    const headersTime = Date.now();

    if (response instanceof globalThis.Error) {
      const retryMessage = `retrying, ${retriesRemaining} attempts remaining`;
      if (options.signal?.aborted) {
        throw new Errors.APIUserAbortError();
      }
      // detect native connection timeout errors
      // deno throws "TypeError: error sending request for url (https://example/): client error (Connect): tcp connect error: Operation timed out (os error 60): Operation timed out (os error 60)"
      // undici throws "TypeError: fetch failed" with cause "ConnectTimeoutError: Connect Timeout Error (attempted address: example:443, timeout: 1ms)"
      // others do not provide enough information to distinguish timeouts from other connection errors
      const isTimeout =
        isAbortError(response) ||
        /timed? ?out/i.test(String(response) + ('cause' in response ? String(response.cause) : ''));
      if (retriesRemaining) {
        loggerFor(this).info(
          `[${requestLogID}] connection ${isTimeout ? 'timed out' : 'failed'} - ${retryMessage}`,
        );
        loggerFor(this).debug(
          `[${requestLogID}] connection ${isTimeout ? 'timed out' : 'failed'} (${retryMessage})`,
          formatRequestDetails({
            retryOfRequestLogID,
            url,
            durationMs: headersTime - startTime,
            message: response.message,
          }),
        );
        return this.retryRequest(options, retriesRemaining, retryOfRequestLogID ?? requestLogID);
      }
      loggerFor(this).info(
        `[${requestLogID}] connection ${isTimeout ? 'timed out' : 'failed'} - error; no more retries left`,
      );
      loggerFor(this).debug(
        `[${requestLogID}] connection ${isTimeout ? 'timed out' : 'failed'} (error; no more retries left)`,
        formatRequestDetails({
          retryOfRequestLogID,
          url,
          durationMs: headersTime - startTime,
          message: response.message,
        }),
      );
      if (isTimeout) {
        throw new Errors.APIConnectionTimeoutError();
      }
      throw new Errors.APIConnectionError({ cause: response });
    }

    const responseInfo = `[${requestLogID}${retryLogStr}] ${req.method} ${url} ${
      response.ok ? 'succeeded' : 'failed'
    } with status ${response.status} in ${headersTime - startTime}ms`;

    if (!response.ok) {
      const shouldRetry = await this.shouldRetry(response);
      if (retriesRemaining && shouldRetry) {
        const retryMessage = `retrying, ${retriesRemaining} attempts remaining`;

        // We don't need the body of this response.
        await Shims.CancelReadableStream(response.body);
        loggerFor(this).info(`${responseInfo} - ${retryMessage}`);
        loggerFor(this).debug(
          `[${requestLogID}] response error (${retryMessage})`,
          formatRequestDetails({
            retryOfRequestLogID,
            url: response.url,
            status: response.status,
            headers: response.headers,
            durationMs: headersTime - startTime,
          }),
        );
        return this.retryRequest(
          options,
          retriesRemaining,
          retryOfRequestLogID ?? requestLogID,
          response.headers,
        );
      }

      const retryMessage = shouldRetry ? `error; no more retries left` : `error; not retryable`;

      loggerFor(this).info(`${responseInfo} - ${retryMessage}`);

      const errText = await response.text().catch((err: any) => castToError(err).message);
      const errJSON = safeJSON(errText) as any;
      const errMessage = errJSON ? undefined : errText;

      loggerFor(this).debug(
        `[${requestLogID}] response error (${retryMessage})`,
        formatRequestDetails({
          retryOfRequestLogID,
          url: response.url,
          status: response.status,
          headers: response.headers,
          message: errMessage,
          durationMs: Date.now() - startTime,
        }),
      );

      const err = this.makeStatusError(response.status, errJSON, errMessage, response.headers);
      throw err;
    }

    loggerFor(this).info(responseInfo);
    loggerFor(this).debug(
      `[${requestLogID}] response start`,
      formatRequestDetails({
        retryOfRequestLogID,
        url: response.url,
        status: response.status,
        headers: response.headers,
        durationMs: headersTime - startTime,
      }),
    );

    return { response, options, controller, requestLogID, retryOfRequestLogID, startTime };
  }

  getAPIList<Item, PageClass extends Pagination.AbstractPage<Item> = Pagination.AbstractPage<Item>>(
    path: string,
    Page: new (...args: any[]) => PageClass,
    opts?: PromiseOrValue<RequestOptions>,
  ): Pagination.PagePromise<PageClass, Item> {
    return this.requestAPIList(
      Page,
      opts && 'then' in opts ?
        opts.then((opts) => ({ method: 'get', path, ...opts }))
      : { method: 'get', path, ...opts },
    );
  }

  requestAPIList<
    Item = unknown,
    PageClass extends Pagination.AbstractPage<Item> = Pagination.AbstractPage<Item>,
  >(
    Page: new (...args: ConstructorParameters<typeof Pagination.AbstractPage>) => PageClass,
    options: PromiseOrValue<FinalRequestOptions>,
  ): Pagination.PagePromise<PageClass, Item> {
    const request = this.makeRequest(options, null, undefined);
    return new Pagination.PagePromise<PageClass, Item>(this as any as Letta, request, Page);
  }

  async fetchWithTimeout(
    url: RequestInfo,
    init: RequestInit | undefined,
    ms: number,
    controller: AbortController,
  ): Promise<Response> {
    const { signal, method, ...options } = init || {};
    const abort = this._makeAbort(controller);
    if (signal) signal.addEventListener('abort', abort, { once: true });

    const timeout = setTimeout(abort, ms);

    const isReadableBody =
      ((globalThis as any).ReadableStream && options.body instanceof (globalThis as any).ReadableStream) ||
      (typeof options.body === 'object' && options.body !== null && Symbol.asyncIterator in options.body);

    const fetchOptions: RequestInit = {
      signal: controller.signal as any,
      ...(isReadableBody ? { duplex: 'half' } : {}),
      method: 'GET',
      ...options,
    };
    if (method) {
      // Custom methods like 'patch' need to be uppercased
      // See https://github.com/nodejs/undici/issues/2294
      fetchOptions.method = method.toUpperCase();
    }

    try {
      // use undefined this binding; fetch errors if bound to something else in browser/cloudflare
      return await this.fetch.call(undefined, url, fetchOptions);
    } finally {
      clearTimeout(timeout);
    }
  }

  private async shouldRetry(response: Response): Promise<boolean> {
    // Note this is not a standard header.
    const shouldRetryHeader = response.headers.get('x-should-retry');

    // If the server explicitly says whether or not to retry, obey.
    if (shouldRetryHeader === 'true') return true;
    if (shouldRetryHeader === 'false') return false;

    // Retry on request timeouts.
    if (response.status === 408) return true;

    // Retry on lock timeouts.
    if (response.status === 409) return true;

    // Retry on rate limits.
    if (response.status === 429) return true;

    // Retry internal errors.
    if (response.status >= 500) return true;

    return false;
  }

  private async retryRequest(
    options: FinalRequestOptions,
    retriesRemaining: number,
    requestLogID: string,
    responseHeaders?: Headers | undefined,
  ): Promise<APIResponseProps> {
    let timeoutMillis: number | undefined;

    // Note the `retry-after-ms` header may not be standard, but is a good idea and we'd like proactive support for it.
    const retryAfterMillisHeader = responseHeaders?.get('retry-after-ms');
    if (retryAfterMillisHeader) {
      const timeoutMs = parseFloat(retryAfterMillisHeader);
      if (!Number.isNaN(timeoutMs)) {
        timeoutMillis = timeoutMs;
      }
    }

    // About the Retry-After header: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After
    const retryAfterHeader = responseHeaders?.get('retry-after');
    if (retryAfterHeader && !timeoutMillis) {
      const timeoutSeconds = parseFloat(retryAfterHeader);
      if (!Number.isNaN(timeoutSeconds)) {
        timeoutMillis = timeoutSeconds * 1000;
      } else {
        timeoutMillis = Date.parse(retryAfterHeader) - Date.now();
      }
    }

    // If the API asks us to wait a certain amount of time, just do what it
    // says, but otherwise calculate a default
    if (timeoutMillis === undefined) {
      const maxRetries = options.maxRetries ?? this.maxRetries;
      timeoutMillis = this.calculateDefaultRetryTimeoutMillis(retriesRemaining, maxRetries);
    }
    await sleep(timeoutMillis);

    return this.makeRequest(options, retriesRemaining - 1, requestLogID);
  }

  private calculateDefaultRetryTimeoutMillis(retriesRemaining: number, maxRetries: number): number {
    const initialRetryDelay = 0.5;
    const maxRetryDelay = 8.0;

    const numRetries = maxRetries - retriesRemaining;

    // Apply exponential backoff, but not more than the max.
    const sleepSeconds = Math.min(initialRetryDelay * Math.pow(2, numRetries), maxRetryDelay);

    // Apply some jitter, take up to at most 25 percent of the retry time.
    const jitter = 1 - Math.random() * 0.25;

    return sleepSeconds * jitter * 1000;
  }

  async buildRequest(
    inputOptions: FinalRequestOptions,
    { retryCount = 0 }: { retryCount?: number } = {},
  ): Promise<{ req: FinalizedRequestInit; url: string; timeout: number }> {
    const options = { ...inputOptions };
    const { method, path, query, defaultBaseURL } = options;

    const url = this.buildURL(path!, query as Record<string, unknown>, defaultBaseURL);
    if ('timeout' in options) validatePositiveInteger('timeout', options.timeout);
    options.timeout = options.timeout ?? this.timeout;
    const { bodyHeaders, body } = this.buildBody({ options });
    const reqHeaders = await this.buildHeaders({ options: inputOptions, method, bodyHeaders, retryCount });

    const req: FinalizedRequestInit = {
      method,
      headers: reqHeaders,
      ...(options.signal && { signal: options.signal }),
      ...((globalThis as any).ReadableStream &&
        body instanceof (globalThis as any).ReadableStream && { duplex: 'half' }),
      ...(body && { body }),
      ...((this.fetchOptions as any) ?? {}),
      ...((options.fetchOptions as any) ?? {}),
    };

    return { req, url, timeout: options.timeout };
  }

  private async buildHeaders({
    options,
    method,
    bodyHeaders,
    retryCount,
  }: {
    options: FinalRequestOptions;
    method: HTTPMethod;
    bodyHeaders: HeadersLike;
    retryCount: number;
  }): Promise<Headers> {
    let idempotencyHeaders: HeadersLike = {};
    if (this.idempotencyHeader && method !== 'get') {
      if (!options.idempotencyKey) options.idempotencyKey = this.defaultIdempotencyKey();
      idempotencyHeaders[this.idempotencyHeader] = options.idempotencyKey;
    }

    const headers = buildHeaders([
      idempotencyHeaders,
      {
        Accept: 'application/json',
        'User-Agent': this.getUserAgent(),
        'X-Stainless-Retry-Count': String(retryCount),
        ...(options.timeout ? { 'X-Stainless-Timeout': String(Math.trunc(options.timeout / 1000)) } : {}),
        ...getPlatformHeaders(),
        'X-Project-Id': this.projectID,
        'X-Project': this.project,
      },
      await this.authHeaders(options),
      this._options.defaultHeaders,
      bodyHeaders,
      options.headers,
    ]);

    this.validateHeaders(headers);

    return headers.values;
  }

  private _makeAbort(controller: AbortController) {
    // note: we can't just inline this method inside `fetchWithTimeout()` because then the closure
    //       would capture all request options, and cause a memory leak.
    return () => controller.abort();
  }

  private buildBody({ options: { body, headers: rawHeaders } }: { options: FinalRequestOptions }): {
    bodyHeaders: HeadersLike;
    body: BodyInit | undefined;
  } {
    if (!body) {
      return { bodyHeaders: undefined, body: undefined };
    }
    const headers = buildHeaders([rawHeaders]);
    if (
      // Pass raw type verbatim
      ArrayBuffer.isView(body) ||
      body instanceof ArrayBuffer ||
      body instanceof DataView ||
      (typeof body === 'string' &&
        // Preserve legacy string encoding behavior for now
        headers.values.has('content-type')) ||
      // `Blob` is superset of `File`
      ((globalThis as any).Blob && body instanceof (globalThis as any).Blob) ||
      // `FormData` -> `multipart/form-data`
      body instanceof FormData ||
      // `URLSearchParams` -> `application/x-www-form-urlencoded`
      body instanceof URLSearchParams ||
      // Send chunked stream (each chunk has own `length`)
      ((globalThis as any).ReadableStream && body instanceof (globalThis as any).ReadableStream)
    ) {
      return { bodyHeaders: undefined, body: body as BodyInit };
    } else if (
      typeof body === 'object' &&
      (Symbol.asyncIterator in body ||
        (Symbol.iterator in body && 'next' in body && typeof body.next === 'function'))
    ) {
      return { bodyHeaders: undefined, body: Shims.ReadableStreamFrom(body as AsyncIterable<Uint8Array>) };
    } else if (
      typeof body === 'object' &&
      headers.values.get('content-type') === 'application/x-www-form-urlencoded'
    ) {
      return {
        bodyHeaders: { 'content-type': 'application/x-www-form-urlencoded' },
        body: this.stringifyQuery(body),
      };
    } else {
      return this.#encoder({ body, headers });
    }
  }

  static Letta = this;
  static DEFAULT_TIMEOUT = 60000; // 1 minute

  static LettaError = Errors.LettaError;
  static APIError = Errors.APIError;
  static APIConnectionError = Errors.APIConnectionError;
  static APIConnectionTimeoutError = Errors.APIConnectionTimeoutError;
  static APIUserAbortError = Errors.APIUserAbortError;
  static NotFoundError = Errors.NotFoundError;
  static ConflictError = Errors.ConflictError;
  static RateLimitError = Errors.RateLimitError;
  static BadRequestError = Errors.BadRequestError;
  static AuthenticationError = Errors.AuthenticationError;
  static InternalServerError = Errors.InternalServerError;
  static PermissionDeniedError = Errors.PermissionDeniedError;
  static UnprocessableEntityError = Errors.UnprocessableEntityError;

  static toFile = Uploads.toFile;

  agents: API.Agents = new API.Agents(this);
  tools: API.Tools = new API.Tools(this);
  blocks: API.Blocks = new API.Blocks(this);
  archives: API.Archives = new API.Archives(this);
  folders: API.Folders = new API.Folders(this);
  models: API.Models = new API.Models(this);
  mcpServers: API.McpServers = new API.McpServers(this);
  runs: API.Runs = new API.Runs(this);
  steps: API.Steps = new API.Steps(this);
  templates: API.Templates = new API.Templates(this);
  tags: API.Tags = new API.Tags(this);
  messages: API.Messages = new API.Messages(this);
  passages: API.Passages = new API.Passages(this);
  conversations: API.Conversations = new API.Conversations(this);
  environments: API.Environments = new API.Environments(this);
  accessTokens: API.AccessTokens = new API.AccessTokens(this);
}

Letta.Agents = Agents;
Letta.Tools = Tools;
Letta.Blocks = Blocks;
Letta.Archives = Archives;
Letta.Folders = Folders;
Letta.Models = Models;
Letta.McpServers = McpServers;
Letta.Runs = Runs;
Letta.Steps = Steps;
Letta.Templates = Templates;
Letta.Tags = Tags;
Letta.Messages = Messages;
Letta.Passages = Passages;
Letta.Conversations = Conversations;
Letta.Environments = Environments;
Letta.AccessTokens = AccessTokens;

export declare namespace Letta {
  export type RequestOptions = Opts.RequestOptions;

  export import ArrayPage = Pagination.ArrayPage;
  export { type ArrayPageParams as ArrayPageParams, type ArrayPageResponse as ArrayPageResponse };

  export import ObjectPage = Pagination.ObjectPage;
  export { type ObjectPageParams as ObjectPageParams, type ObjectPageResponse as ObjectPageResponse };

  export import NextFilesPage = Pagination.NextFilesPage;
  export {
    type NextFilesPageParams as NextFilesPageParams,
    type NextFilesPageResponse as NextFilesPageResponse,
  };

  export { type HealthResponse as HealthResponse };

  export {
    Agents as Agents,
    type AgentEnvironmentVariable as AgentEnvironmentVariable,
    type AgentState as AgentState,
    type AgentType as AgentType,
    type AnthropicModelSettings as AnthropicModelSettings,
    type AzureModelSettings as AzureModelSettings,
    type BedrockModelSettings as BedrockModelSettings,
    type ChildToolRule as ChildToolRule,
    type ConditionalToolRule as ConditionalToolRule,
    type ContinueToolRule as ContinueToolRule,
    type DeepseekModelSettings as DeepseekModelSettings,
    type GoogleAIModelSettings as GoogleAIModelSettings,
    type GoogleVertexModelSettings as GoogleVertexModelSettings,
    type GroqModelSettings as GroqModelSettings,
    type InitToolRule as InitToolRule,
    type JsonObjectResponseFormat as JsonObjectResponseFormat,
    type JsonSchemaResponseFormat as JsonSchemaResponseFormat,
    type LettaMessageContentUnion as LettaMessageContentUnion,
    type MaxCountPerStepToolRule as MaxCountPerStepToolRule,
    type MessageCreate as MessageCreate,
    type OpenAIModelSettings as OpenAIModelSettings,
    type ParentToolRule as ParentToolRule,
    type RequiredBeforeExitToolRule as RequiredBeforeExitToolRule,
    type RequiresApprovalToolRule as RequiresApprovalToolRule,
    type TerminalToolRule as TerminalToolRule,
    type TextResponseFormat as TextResponseFormat,
    type TogetherModelSettings as TogetherModelSettings,
    type XaiModelSettings as XaiModelSettings,
    type AgentDeleteResponse as AgentDeleteResponse,
    type AgentExportFileResponse as AgentExportFileResponse,
    type AgentImportFileResponse as AgentImportFileResponse,
    type AgentRecompileResponse as AgentRecompileResponse,
    type AgentStatesArrayPage as AgentStatesArrayPage,
    type AgentCreateParams as AgentCreateParams,
    type AgentRetrieveParams as AgentRetrieveParams,
    type AgentUpdateParams as AgentUpdateParams,
    type AgentListParams as AgentListParams,
    type AgentExportFileParams as AgentExportFileParams,
    type AgentImportFileParams as AgentImportFileParams,
    type AgentRecompileParams as AgentRecompileParams,
  };

  export {
    Tools as Tools,
    type NpmRequirement as NpmRequirement,
    type PipRequirement as PipRequirement,
    type Tool as Tool,
    type ToolCreate as ToolCreate,
    type ToolReturnMessage as ToolReturnMessage,
    type ToolSearchRequest as ToolSearchRequest,
    type ToolSearchResult as ToolSearchResult,
    type ToolType as ToolType,
    type ToolDeleteResponse as ToolDeleteResponse,
    type ToolSearchResponse as ToolSearchResponse,
    type ToolsArrayPage as ToolsArrayPage,
    type ToolCreateParams as ToolCreateParams,
    type ToolUpdateParams as ToolUpdateParams,
    type ToolListParams as ToolListParams,
    type ToolSearchParams as ToolSearchParams,
    type ToolUpsertParams as ToolUpsertParams,
  };

  export {
    Blocks as Blocks,
    type BlockResponse as BlockResponse,
    type CreateBlock as CreateBlock,
    type BlockDeleteResponse as BlockDeleteResponse,
    type BlockResponsesArrayPage as BlockResponsesArrayPage,
    type BlockCreateParams as BlockCreateParams,
    type BlockUpdateParams as BlockUpdateParams,
    type BlockListParams as BlockListParams,
  };

  export {
    Archives as Archives,
    type Archive as Archive,
    type VectorDBProvider as VectorDBProvider,
    type ArchivesArrayPage as ArchivesArrayPage,
    type ArchiveCreateParams as ArchiveCreateParams,
    type ArchiveUpdateParams as ArchiveUpdateParams,
    type ArchiveListParams as ArchiveListParams,
  };

  export {
    Folders as Folders,
    type Folder as Folder,
    type FolderDeleteResponse as FolderDeleteResponse,
    type FoldersArrayPage as FoldersArrayPage,
    type FolderCreateParams as FolderCreateParams,
    type FolderUpdateParams as FolderUpdateParams,
    type FolderListParams as FolderListParams,
  };

  export {
    Models as Models,
    type EmbeddingConfig as EmbeddingConfig,
    type EmbeddingModel as EmbeddingModel,
    type LlmConfig as LlmConfig,
    type Model as Model,
    type ProviderCategory as ProviderCategory,
    type ProviderType as ProviderType,
    type ModelListResponse as ModelListResponse,
    type ModelListParams as ModelListParams,
  };

  export {
    McpServers as McpServers,
    type CreateSseMcpServer as CreateSseMcpServer,
    type CreateStdioMcpServer as CreateStdioMcpServer,
    type CreateStreamableHTTPMcpServer as CreateStreamableHTTPMcpServer,
    type SseMcpServer as SseMcpServer,
    type StdioMcpServer as StdioMcpServer,
    type StreamableHTTPMcpServer as StreamableHTTPMcpServer,
    type UpdateSseMcpServer as UpdateSseMcpServer,
    type UpdateStdioMcpServer as UpdateStdioMcpServer,
    type UpdateStreamableHTTPMcpServer as UpdateStreamableHTTPMcpServer,
    type McpServerCreateResponse as McpServerCreateResponse,
    type McpServerRetrieveResponse as McpServerRetrieveResponse,
    type McpServerUpdateResponse as McpServerUpdateResponse,
    type McpServerListResponse as McpServerListResponse,
    type McpServerRefreshResponse as McpServerRefreshResponse,
    type McpServerCreateParams as McpServerCreateParams,
    type McpServerUpdateParams as McpServerUpdateParams,
    type McpServerRefreshParams as McpServerRefreshParams,
  };

  export {
    Runs as Runs,
    type Job as Job,
    type StopReasonType as StopReasonType,
    type RunListParams as RunListParams,
  };

  export {
    Steps as Steps,
    type ProviderTrace as ProviderTrace,
    type Step as Step,
    type StepsArrayPage as StepsArrayPage,
    type StepListParams as StepListParams,
  };

  export {
    Templates as Templates,
    type TemplateCreateResponse as TemplateCreateResponse,
    type TemplateUpdateResponse as TemplateUpdateResponse,
    type TemplateDeleteResponse as TemplateDeleteResponse,
    type TemplateRollbackResponse as TemplateRollbackResponse,
    type TemplateSaveResponse as TemplateSaveResponse,
    type TemplateCreateParams as TemplateCreateParams,
    type TemplateUpdateParams as TemplateUpdateParams,
    type TemplateDeleteParams as TemplateDeleteParams,
    type TemplateRollbackParams as TemplateRollbackParams,
    type TemplateSaveParams as TemplateSaveParams,
  };

  export { Tags as Tags, type TagListResponse as TagListResponse, type TagListParams as TagListParams };

  export {
    Messages as Messages,
    type MessageSearchRequest as MessageSearchRequest,
    type MessageSearchResult as MessageSearchResult,
    type MessageRetrieveResponse as MessageRetrieveResponse,
    type MessageListResponse as MessageListResponse,
    type MessageSearchResponse as MessageSearchResponse,
    type MessageListParams as MessageListParams,
    type MessageSearchParams as MessageSearchParams,
  };

  export {
    Passages as Passages,
    type Passage as Passage,
    type PassageSearchResponse as PassageSearchResponse,
    type PassageSearchParams as PassageSearchParams,
  };

  export {
    Conversations as Conversations,
    type Conversation as Conversation,
    type CreateConversation as CreateConversation,
    type UpdateConversation as UpdateConversation,
    type ConversationListResponse as ConversationListResponse,
    type ConversationDeleteResponse as ConversationDeleteResponse,
    type ConversationCancelResponse as ConversationCancelResponse,
    type ConversationRecompileResponse as ConversationRecompileResponse,
    type ConversationCreateParams as ConversationCreateParams,
    type ConversationUpdateParams as ConversationUpdateParams,
    type ConversationListParams as ConversationListParams,
    type ConversationCancelParams as ConversationCancelParams,
    type ConversationForkParams as ConversationForkParams,
    type ConversationRecompileParams as ConversationRecompileParams,
  };

  export {
    Environments as Environments,
    type EnvironmentRetrieveResponse as EnvironmentRetrieveResponse,
    type EnvironmentListResponse as EnvironmentListResponse,
    type EnvironmentSendMessageResponse as EnvironmentSendMessageResponse,
    type EnvironmentListParams as EnvironmentListParams,
    type EnvironmentSendMessageParams as EnvironmentSendMessageParams,
  };

  export {
    AccessTokens as AccessTokens,
    type AccessTokenCreateResponse as AccessTokenCreateResponse,
    type AccessTokenListResponse as AccessTokenListResponse,
    type AccessTokenDeleteResponse as AccessTokenDeleteResponse,
    type AccessTokenCreateParams as AccessTokenCreateParams,
    type AccessTokenListParams as AccessTokenListParams,
    type AccessTokenDeleteParams as AccessTokenDeleteParams,
  };
}