import { afterAll, describe, expect, it } from 'bun:test';
import { mkdtempSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { handleSubscribersInstallDaemon } from './subscribers-install-daemon';

// resolveCeliloPath existence-checks explicit overrides, so the render
// needs a celilo path that exists — a fake binary in a temp dir.
const FAKE_CELOLILO = join(mkdtempSync(join(tmpdir(), 'celilo-fake-bin-')), 'celilo');
writeFileSync(FAKE_CELOLILO, '#!/bin/sh\n', { mode: 0o755 });

// --print renders without writing, so these tests never touch unit paths.
const PRINT_FLAGS = { print: true, 'celilo-path': FAKE_CELOLILO };

const SAVED_ENV = process.env.CELILO_BUS_SECRET;
afterAll(() => {
  if (SAVED_ENV === undefined) delete process.env.CELILO_BUS_SECRET;
  else process.env.CELILO_BUS_SECRET = SAVED_ENV;
});

describe('handleSubscribersInstallDaemon secret resolution', () => {
  it('falls back to CELILO_BUS_SECRET when --secret is absent — the doctor remediation and the rendered unit both lean on that env var', async () => {
    process.env.CELILO_BUS_SECRET = 'env-secret';
    const result = await handleSubscribersInstallDaemon([], { ...PRINT_FLAGS });
    if (!result.success) throw new Error(`expected success: ${result.error}`);
  });

  it('prefers the --secret flag over the environment', async () => {
    process.env.CELILO_BUS_SECRET = 'env-secret';
    const result = await handleSubscribersInstallDaemon([], {
      ...PRINT_FLAGS,
      secret: 'flag-secret',
    });
    if (!result.success) throw new Error(`expected success: ${result.error}`);
    expect((result.data as { unitContent: string }).unitContent).toContain('flag-secret');
  });

  it('refuses to render when neither source has a secret', async () => {
    delete process.env.CELILO_BUS_SECRET;
    const result = await handleSubscribersInstallDaemon([], { ...PRINT_FLAGS });
    if (result.success) throw new Error('expected failure');
    expect(result.error).toContain('secret is required');
  });
});