import { afterEach, describe, expect, it } from 'vitest';
import { clearCordnSeen, readCordnSeen, writeCordnSeen } from './unread';

const PK = 'a'.repeat(64);
const GID = 'skatespots:community';

describe('cordn unread cursor', () => {
  afterEach(() => localStorage.clear());

  it('distinguishes never-seen from seen-at-zero', () => {
    expect(readCordnSeen(PK, GID)).toBeNull();
    writeCordnSeen(PK, GID, 0);
    expect(readCordnSeen(PK, GID)).toBe(0);
  });

  it('round-trips the newest timestamp per account + room', () => {
    writeCordnSeen(PK, GID, 1_700_000_000);
    expect(readCordnSeen(PK, GID)).toBe(1_700_000_000);
    expect(readCordnSeen('b'.repeat(64), GID)).toBeNull();
    expect(readCordnSeen(PK, 'other:room')).toBeNull();
  });

  it('clears a cursor', () => {
    writeCordnSeen(PK, GID, 42);
    clearCordnSeen(PK, GID);
    expect(readCordnSeen(PK, GID)).toBeNull();
  });
});