import assert from 'node:assert/strict';
import test from 'node:test';

import {
  parseSubscriptionBody,
  selectRefreshedServer,
} from '../../src/server/subscription.js';

test('subscription server tags are trimmed for selection', () => {
  const { servers } = parseSubscriptionBody(JSON.stringify({
    outbounds: [{ type: 'vless', tag: 'de-frankfurt ', server: 'de.example', server_port: 443 }],
  }));

  assert.equal(servers[0].tag, 'de-frankfurt');
});

test('refreshed subscription keeps the selected server when its tag still exists', () => {
  const servers = [{ tag: 'de' }, { tag: 'nl' }];

  assert.equal(selectRefreshedServer('nl', servers), 'nl');
});

test('refreshed subscription selects the first server when the old tag disappeared', () => {
  const servers = [{ tag: 'de' }, { tag: 'nl' }];

  assert.equal(selectRefreshedServer('old-name', servers), 'de');
});

test('refreshed subscription does not select a server before the first user choice', () => {
  assert.equal(selectRefreshedServer('', [{ tag: 'de' }]), '');
});