/**
 * Integration test setup — connects to local MongoDB and provides
 * a clean database for each test suite.
 */
import { MongoClient, Db } from 'mongodb'

const MONGO_URI = 'mongodb://adam:adam@localhost:27017/adam-acs-test?authSource=admin'
const DB_NAME = 'adam-acs-test'

let client: MongoClient
let db: Db

export async function setupMongo(): Promise<Db> {
  client = new MongoClient(MONGO_URI)
  await client.connect()
  db = client.db(DB_NAME)

  // Monkey-patch getMongoDb to use our test DB
  const provider = await import('../../providers/mongodb_provider.js')
  ;(provider as any).getMongoDb = () => db
  // Also patch the module-level variable via a workaround
  Object.defineProperty(await import('../../providers/mongodb_provider.js'), 'getMongoDb', {
    value: () => db,
  })

  return db
}

export async function teardownMongo(): Promise<void> {
  if (db) {
    await db.dropDatabase()
  }
  if (client) {
    await client.close()
  }
}

export async function cleanCollections(): Promise<void> {
  if (!db) return
  const collections = await db.listCollections().toArray()
  for (const col of collections) {
    await db.collection(col.name).deleteMany({})
  }
}

export function getTestDb(): Db {
  return db
}