import { describe, expect, it } from 'vitest';
import { semverLt, formatUpdateNotice } from '../src/runtime/update-checker.js';
import type { UpdateCheckResult } from '../src/runtime/update-checker.js';

describe('semverLt', () => {
  it('returns true when a < b', () => {
    expect(semverLt('0.0.1', '0.0.2')).toBe(true);
    expect(semverLt('0.1.0', '0.2.0')).toBe(true);
    expect(semverLt('1.0.0', '2.0.0')).toBe(true);
    expect(semverLt('0.0.1-alpha.1', '0.0.1-alpha.2')).toBe(true);
    expect(semverLt('0.0.1-alpha.1', '0.0.1')).toBe(true);
  });

  it('returns false when a >= b', () => {
    expect(semverLt('0.0.2', '0.0.1')).toBe(false);
    expect(semverLt('1.0.0', '1.0.0')).toBe(false);
    expect(semverLt('2.0.0', '1.0.0')).toBe(false);
  });

  it('returns false for empty strings', () => {
    expect(semverLt('', '1.0.0')).toBe(false);
    expect(semverLt('1.0.0', '')).toBe(false);
    expect(semverLt('', '')).toBe(false);
  });
});

describe('formatUpdateNotice', () => {
  it('returns empty string when up to date', () => {
    const result: UpdateCheckResult = {
      current: '1.0.0',
      latest: '1.0.0',
      updateAvailable: false,
      checkedAt: new Date().toISOString(),
      registry: 'https://example.com',
    };
    expect(formatUpdateNotice(result)).toBe('');
  });

  it('returns a notice when update is available', () => {
    const result: UpdateCheckResult = {
      current: '0.0.1',
      latest: '0.1.0',
      updateAvailable: true,
      checkedAt: new Date().toISOString(),
      registry: 'https://example.com',
    };
    const notice = formatUpdateNotice(result);
    expect(notice).toContain('0.0.1');
    expect(notice).toContain('0.1.0');
    expect(notice).toContain('Update available');
  });
});