import { textDirectionForLocale } from "@rakazo/core";
import { reloadAppAsync } from "expo";
import { I18nManager, Platform } from "react-native";

let directionReloadScheduled = false;

export function resolveMobileUiLocale(): string {
  return Intl.DateTimeFormat().resolvedOptions().locale || "en";
}

export function applyMobileUiDirection(locale = resolveMobileUiLocale()) {
  const rtl = textDirectionForLocale(locale) === "rtl";
  // Always allow RTL so a later locale switch can take effect after relaunch.
  I18nManager.allowRTL(true);
  if (I18nManager.isRTL === rtl) return rtl;

  // forceRTL persists and only takes effect after reload / next cold start.
  I18nManager.forceRTL(rtl);
  if (!directionReloadScheduled && Platform.OS !== "web") {
    directionReloadScheduled = true;
    queueMicrotask(() => {
      void reloadAppAsync("ui-direction").catch(() => {
        directionReloadScheduled = false;
      });
    });
  }
  return rtl;
}