// PROVEN 2026-08-01 by the spike + Spencer's build. Measured evidence:
// - main.tsx.js: 4352 KB -> 4446 KB (+94 KB - the loader shim + webpack's chunk-loading
// runtime, NOT the SDK itself).
// - 460.js emitted at 1241 KB and contains Chime (webpack id hint: vendors, [immutable]).
// - Control: main.tsx.js does NOT contain the string `DefaultMeetingSession` - the SDK did
// not leak into the main bundle.
// - webpack's `Entrypoint main.tsx` lists only main.tsx.css, main.tsx.js, main.tsx-rtl.css,
// main.tsx.asset.php - the Chime chunk (460.js) is absent from the entrypoint.
// - Build exit 0, 2 warnings, both pre-existing asset-size warnings unrelated to this change.
// This proves webpack emits a separate, loadable chunk and excludes it from the initial
// entrypoint under WP's enqueue of build/main.tsx.js (publicPath 'auto' resolves against
// document.currentScript, i.e. the plugin's own build dir). It does NOT prove the browser
// actually fetches that chunk successfully at runtime - that closes the first time
// loadChimeSdk() runs on a real page (Task 4+). Keep this the ONLY import site for the SDK.
import type * as ChimeSdk from 'amazon-chime-sdk-js';

// Cache the PROMISE, not the resolved value: two callers racing before the first `await`
// resolves must share one `import()`, not both trigger their own.
let cachedPromise: Promise<typeof ChimeSdk> | null = null;

export function loadChimeSdk(): Promise<typeof ChimeSdk> {
  cachedPromise ??= import('amazon-chime-sdk-js');
  return cachedPromise;
}