function assert(condition: unknown, message = "assertion failed"): void {
  if (!condition) throw new Error(message);
}

function assertEqual<T>(actual: T, expected: T, message = "values should be equal"): void {
  if (actual !== expected) throw new Error(`${message}: expected ${String(expected)}, got ${String(actual)}`);
}

function assertDeepEqual(actual: unknown, expected: unknown, message = "values should be deeply equal"): void {
  const actualJson = JSON.stringify(actual);
  const expectedJson = JSON.stringify(expected);
  if (actualJson !== expectedJson) throw new Error(`${message}: expected ${expectedJson}, got ${actualJson}`);
}

import { buildMailboxFolderTree, findFolderNodeId, folderAncestorIds, folderParts } from "../src/features/mail/mailboxFolders";

assertDeepEqual(folderParts("INBOX.Sent.Archive"), ["INBOX", "Sent", "Archive"]);
assertDeepEqual(folderParts("Projects/2026/Inbox"), ["Projects", "2026", "Inbox"]);

const tree = buildMailboxFolderTree([
  { name: "Archive/2026", flags: [] },
  { name: "INBOX", flags: [] },
  { name: "INBOX.Sent", flags: ["\\Sent"] },
  { name: "Projects/2026/Inbox", flags: [] }
]);

assertEqual(tree[0].id, "INBOX", "INBOX sorts first");
assertEqual(findFolderNodeId(tree, "INBOX.Sent"), "INBOX/Sent");
assertDeepEqual(folderAncestorIds(tree, "Projects/2026/Inbox"), ["Projects", "Projects/2026", "Projects/2026/Inbox"]);
assertEqual(tree.find((node) => node.id === "INBOX")?.children[0]?.folderName, "INBOX.Sent");