/** 跨库访问检查的用例（任务 A1.6）：负例必须真的失败。 */
import assert from 'node:assert/strict';
import { mkdir, mkdtemp, rm, writeFile } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { dirname, join } from 'node:path';
import { test } from 'node:test';
import { fileURLToPath } from 'node:url';

import { findCrossDatabaseAccess } from './check-cross-database.mjs';

const ROOT = fileURLToPath(new URL('..', import.meta.url));

async function withFixture(files, run) {
  const dir = await mkdtemp(join(tmpdir(), 'crossdb-'));
  try {
    for (const [rel, content] of Object.entries(files)) {
      const file = join(dir, rel);
      await mkdir(dirname(file), { recursive: true });
      await writeFile(file, content, 'utf8');
    }
    return await run(dir);
  } finally {
    await rm(dir, { recursive: true, force: true });
  }
}

test('正例：当前仓库无跨库访问', async () => {
  assert.deepEqual(await findCrossDatabaseAccess(ROOT), []);
});

test('负例：平台代码里出现 APS 表名被拦下', async () => {
  await withFixture(
    { 'server/core/query.ts': 'const sql = "select * from routing_templates";\nexport const q = sql;\n' },
    async (dir) => {
      const violations = await findCrossDatabaseAccess(dir);
      assert.ok(violations.some((v) => v.reason.includes('routing_templates')), JSON.stringify(violations));
    },
  );
});

test('负例：平台代码里出现 APS 库连接串被拦下', async () => {
  await withFixture(
    { 'server/app/config.ts': 'export const url = "postgres://user:pw@db/aps_db";\n' },
    async (dir) => {
      const violations = await findCrossDatabaseAccess(dir);
      assert.ok(violations.length > 0, JSON.stringify(violations));
    },
  );
});