var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
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 __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

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

// src/configurations.ts
function resolveUserAgentConfig(input) {
  return {
    ...input,
    customUserAgent: typeof input.customUserAgent === "string" ? [[input.customUserAgent]] : input.customUserAgent
  };
}
__name(resolveUserAgentConfig, "resolveUserAgentConfig");

// src/user-agent-middleware.ts
var import_util_endpoints = require("@aws-sdk/util-endpoints");
var import_protocol_http = require("@smithy/protocol-http");

// src/constants.ts
var USER_AGENT = "user-agent";
var X_AMZ_USER_AGENT = "x-amz-user-agent";
var SPACE = " ";
var UA_NAME_SEPARATOR = "/";
var UA_NAME_ESCAPE_REGEX = /[^\!\$\%\&\'\*\+\-\.\^\_\`\|\~\d\w]/g;
var UA_VALUE_ESCAPE_REGEX = /[^\!\$\%\&\'\*\+\-\.\^\_\`\|\~\d\w\#]/g;
var UA_ESCAPE_CHAR = "-";

// src/user-agent-middleware.ts
var userAgentMiddleware = /* @__PURE__ */ __name((options) => (next, context) => async (args) => {
  var _a, _b;
  const { request } = args;
  if (!import_protocol_http.HttpRequest.isInstance(request))
    return next(args);
  const { headers } = request;
  const userAgent = ((_a = context == null ? void 0 : context.userAgent) == null ? void 0 : _a.map(escapeUserAgent)) || [];
  const defaultUserAgent = (await options.defaultUserAgentProvider()).map(escapeUserAgent);
  const customUserAgent = ((_b = options == null ? void 0 : options.customUserAgent) == null ? void 0 : _b.map(escapeUserAgent)) || [];
  const prefix = (0, import_util_endpoints.getUserAgentPrefix)();
  const sdkUserAgentValue = (prefix ? [prefix] : []).concat([...defaultUserAgent, ...userAgent, ...customUserAgent]).join(SPACE);
  const normalUAValue = [
    ...defaultUserAgent.filter((section) => section.startsWith("aws-sdk-")),
    ...customUserAgent
  ].join(SPACE);
  if (options.runtime !== "browser") {
    if (normalUAValue) {
      headers[X_AMZ_USER_AGENT] = headers[X_AMZ_USER_AGENT] ? `${headers[USER_AGENT]} ${normalUAValue}` : normalUAValue;
    }
    headers[USER_AGENT] = sdkUserAgentValue;
  } else {
    headers[X_AMZ_USER_AGENT] = sdkUserAgentValue;
  }
  return next({
    ...args,
    request
  });
}, "userAgentMiddleware");
var escapeUserAgent = /* @__PURE__ */ __name((userAgentPair) => {
  var _a;
  const name = userAgentPair[0].split(UA_NAME_SEPARATOR).map((part) => part.replace(UA_NAME_ESCAPE_REGEX, UA_ESCAPE_CHAR)).join(UA_NAME_SEPARATOR);
  const version = (_a = userAgentPair[1]) == null ? void 0 : _a.replace(UA_VALUE_ESCAPE_REGEX, UA_ESCAPE_CHAR);
  const prefixSeparatorIndex = name.indexOf(UA_NAME_SEPARATOR);
  const prefix = name.substring(0, prefixSeparatorIndex);
  let uaName = name.substring(prefixSeparatorIndex + 1);
  if (prefix === "api") {
    uaName = uaName.toLowerCase();
  }
  return [prefix, uaName, version].filter((item) => item && item.length > 0).reduce((acc, item, index) => {
    switch (index) {
      case 0:
        return item;
      case 1:
        return `${acc}/${item}`;
      default:
        return `${acc}#${item}`;
    }
  }, "");
}, "escapeUserAgent");
var getUserAgentMiddlewareOptions = {
  name: "getUserAgentMiddleware",
  step: "build",
  priority: "low",
  tags: ["SET_USER_AGENT", "USER_AGENT"],
  override: true
};
var getUserAgentPlugin = /* @__PURE__ */ __name((config) => ({
  applyToStack: (clientStack) => {
    clientStack.add(userAgentMiddleware(config), getUserAgentMiddlewareOptions);
  }
}), "getUserAgentPlugin");
// Annotate the CommonJS export names for ESM import in node:

0 && (module.exports = {
  resolveUserAgentConfig,
  userAgentMiddleware,
  getUserAgentMiddlewareOptions,
  getUserAgentPlugin
});

