import { Asset } from "expo-asset";
import { File } from "expo-file-system";
import { widgetsDirectory } from "expo-widgets";
import { Platform } from "react-native";

const MARK_FILE = "beenvoice-live-mark.png";
const LOGO_FILE = "beenvoice-live-logo.png";

let cachedUris: { markUri: string; logoUri: string } | null = null;
let copyPromise: Promise<{ markUri: string; logoUri: string } | null> | null = null;

async function copyBrandFile(fromUri: string, toUri: string) {
  await new File(fromUri).copy(new File(toUri), { overwrite: true });
}

/** Copy brand PNGs into the app-group folder so the widget extension can read them. */
export async function ensureWidgetBrandAssets(): Promise<{
  markUri: string;
  logoUri: string;
} | null> {
  if (cachedUris) return cachedUris;
  if (copyPromise) return copyPromise;

  copyPromise = (async () => {
    if (Platform.OS !== "ios" || !widgetsDirectory) return null;

    const base = widgetsDirectory.endsWith("/") ? widgetsDirectory : `${widgetsDirectory}/`;
    const markUri = `${base}${MARK_FILE}`;
    const logoUri = `${base}${LOGO_FILE}`;

    const markAsset = Asset.fromModule(require("@/assets/images/icon.png"));
    const logoAsset = Asset.fromModule(require("@/assets/images/beenvoice-logo-dark.png"));
    await Promise.all([markAsset.downloadAsync(), logoAsset.downloadAsync()]);

    if (!markAsset.localUri || !logoAsset.localUri) return null;

    await Promise.all([
      copyBrandFile(markAsset.localUri, markUri),
      copyBrandFile(logoAsset.localUri, logoUri),
    ]);

    cachedUris = { markUri, logoUri };
    return cachedUris;
  })();

  try {
    return await copyPromise;
  } finally {
    copyPromise = null;
  }
}

export function getWidgetBrandAssetUris() {
  return cachedUris;
}