import { afterEach, beforeEach, describe, expect, it } from 'bun:test';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { E2E_CONFLICT_FIX, E2E_CONFLICT_MESSAGE, runningE2eContainers } from './e2e-guard';

describe('e2e-guard', () => {
  let prev: string | undefined;
  beforeEach(() => {
    prev = process.env.CELILO_DB_PATH;
  });
  afterEach(() => {
    process.env.CELILO_DB_PATH = prev;
  });

  it('skips the docker check when running against a temp test DB', () => {
    // Integration tests point CELILO_DB_PATH at os.tmpdir() and must not trip
    // over a developer's unrelated e2e stack.
    process.env.CELILO_DB_PATH = join(tmpdir(), 'celilo-test.db');
    expect(runningE2eContainers()).toEqual([]);
  });

  it('returns an array and never throws when docker is checked', () => {
    // A non-temp path defeats the short-circuit, exercising the real docker
    // path. Result depends on the host's docker state; the contract is "an
    // array of celilo-e2e-* names, never an exception".
    process.env.CELILO_DB_PATH = '/opt/celilo/celilo.db';
    const result = runningE2eContainers();
    expect(Array.isArray(result)).toBe(true);
    for (const name of result) {
      expect(name.startsWith('celilo-e2e-')).toBe(true);
    }
  });

  it('exposes a deploy message that includes the remediation hint', () => {
    expect(E2E_CONFLICT_MESSAGE).toContain(E2E_CONFLICT_FIX);
    expect(E2E_CONFLICT_MESSAGE).toContain('mutually exclusive');
  });
});