var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
  // file that has been converted to a CommonJS file using a Babel-
  // compatible transform (i.e. "__esModule" has not been set), then set
  // "default" to the CommonJS "module.exports" for node compatibility.
  isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
  mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/index.ts
var src_exports = {};
__export(src_exports, {
  resolveDefaultsModeConfig: () => resolveDefaultsModeConfig
});
module.exports = __toCommonJS(src_exports);

// src/resolveDefaultsModeConfig.ts
var import_config_resolver = require("@smithy/config-resolver");
var import_node_config_provider = require("@smithy/node-config-provider");
var import_property_provider = require("@smithy/property-provider");

// src/constants.ts
var AWS_EXECUTION_ENV = "AWS_EXECUTION_ENV";
var AWS_REGION_ENV = "AWS_REGION";
var AWS_DEFAULT_REGION_ENV = "AWS_DEFAULT_REGION";
var ENV_IMDS_DISABLED = "AWS_EC2_METADATA_DISABLED";
var DEFAULTS_MODE_OPTIONS = ["in-region", "cross-region", "mobile", "standard", "legacy"];
var IMDS_REGION_PATH = "/latest/meta-data/placement/region";

// src/defaultsModeConfig.ts
var AWS_DEFAULTS_MODE_ENV = "AWS_DEFAULTS_MODE";
var AWS_DEFAULTS_MODE_CONFIG = "defaults_mode";
var NODE_DEFAULTS_MODE_CONFIG_OPTIONS = {
  environmentVariableSelector: (env) => {
    return env[AWS_DEFAULTS_MODE_ENV];
  },
  configFileSelector: (profile) => {
    return profile[AWS_DEFAULTS_MODE_CONFIG];
  },
  default: "legacy"
};

// src/resolveDefaultsModeConfig.ts
var resolveDefaultsModeConfig = /* @__PURE__ */ __name(({
  region = (0, import_node_config_provider.loadConfig)(import_config_resolver.NODE_REGION_CONFIG_OPTIONS),
  defaultsMode = (0, import_node_config_provider.loadConfig)(NODE_DEFAULTS_MODE_CONFIG_OPTIONS)
} = {}) => (0, import_property_provider.memoize)(async () => {
  const mode = typeof defaultsMode === "function" ? await defaultsMode() : defaultsMode;
  switch (mode == null ? void 0 : mode.toLowerCase()) {
    case "auto":
      return resolveNodeDefaultsModeAuto(region);
    case "in-region":
    case "cross-region":
    case "mobile":
    case "standard":
    case "legacy":
      return Promise.resolve(mode == null ? void 0 : mode.toLocaleLowerCase());
    case void 0:
      return Promise.resolve("legacy");
    default:
      throw new Error(
        `Invalid parameter for "defaultsMode", expect ${DEFAULTS_MODE_OPTIONS.join(", ")}, got ${mode}`
      );
  }
}), "resolveDefaultsModeConfig");
var resolveNodeDefaultsModeAuto = /* @__PURE__ */ __name(async (clientRegion) => {
  if (clientRegion) {
    const resolvedRegion = typeof clientRegion === "function" ? await clientRegion() : clientRegion;
    const inferredRegion = await inferPhysicalRegion();
    if (!inferredRegion) {
      return "standard";
    }
    if (resolvedRegion === inferredRegion) {
      return "in-region";
    } else {
      return "cross-region";
    }
  }
  return "standard";
}, "resolveNodeDefaultsModeAuto");
var inferPhysicalRegion = /* @__PURE__ */ __name(async () => {
  if (process.env[AWS_EXECUTION_ENV] && (process.env[AWS_REGION_ENV] || process.env[AWS_DEFAULT_REGION_ENV])) {
    return process.env[AWS_REGION_ENV] ?? process.env[AWS_DEFAULT_REGION_ENV];
  }
  if (!process.env[ENV_IMDS_DISABLED]) {
    try {
      const { getInstanceMetadataEndpoint, httpRequest } = await Promise.resolve().then(() => __toESM(require("@smithy/credential-provider-imds")));
      const endpoint = await getInstanceMetadataEndpoint();
      return (await httpRequest({ ...endpoint, path: IMDS_REGION_PATH })).toString();
    } catch (e) {
    }
  }
}, "inferPhysicalRegion");
// Annotate the CommonJS export names for ESM import in node:

0 && (module.exports = {
  resolveDefaultsModeConfig
});