import { expect, tap } from '@git.zone/tstest/tapbundle';
import { S3Client, CreateBucketCommand, ListBucketsCommand, PutObjectCommand, GetObjectCommand, DeleteObjectCommand, DeleteBucketCommand } from '@aws-sdk/client-s3';
import { Readable } from 'stream';
import * as smarts3 from '../ts/index.js';

let testSmarts3Instance: smarts3.Smarts3;
let s3Client: S3Client;

// Helper to convert stream to string
async function streamToString(stream: Readable): Promise<string> {
  const chunks: Buffer[] = [];
  return new Promise((resolve, reject) => {
    stream.on('data', (chunk) => chunks.push(Buffer.from(chunk)));
    stream.on('error', reject);
    stream.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')));
  });
}

tap.test('should start the S3 server and configure client', async () => {
  testSmarts3Instance = await smarts3.Smarts3.createAndStart({
    port: 3337,
    cleanSlate: true,
    silent: true,
  });

  const descriptor = await testSmarts3Instance.getS3Descriptor();

  s3Client = new S3Client({
    endpoint: `http://${descriptor.endpoint}:${descriptor.port}`,
    region: 'us-east-1',
    credentials: {
      accessKeyId: descriptor.accessKey,
      secretAccessKey: descriptor.accessSecret,
    },
    forcePathStyle: true,
  });
});

tap.test('should list buckets (empty)', async () => {
  const response = await s3Client.send(new ListBucketsCommand({}));
  expect(Array.isArray(response.Buckets)).toEqual(true);
  expect(response.Buckets!.length).toEqual(0);
});

tap.test('should create a bucket', async () => {
  const response = await s3Client.send(new CreateBucketCommand({ Bucket: 'test-bucket' }));
  expect(response.$metadata.httpStatusCode).toEqual(200);
});

tap.test('should list buckets (showing created bucket)', async () => {
  const response = await s3Client.send(new ListBucketsCommand({}));
  expect(response.Buckets!.length).toEqual(1);
  expect(response.Buckets![0].Name).toEqual('test-bucket');
});

tap.test('should upload an object', async () => {
  const response = await s3Client.send(new PutObjectCommand({
    Bucket: 'test-bucket',
    Key: 'test-file.txt',
    Body: 'Hello from AWS SDK!',
    ContentType: 'text/plain',
  }));
  expect(response.$metadata.httpStatusCode).toEqual(200);
  expect(response.ETag).toBeTypeofString();
});

tap.test('should download the object', async () => {
  const response = await s3Client.send(new GetObjectCommand({
    Bucket: 'test-bucket',
    Key: 'test-file.txt',
  }));

  expect(response.$metadata.httpStatusCode).toEqual(200);
  const content = await streamToString(response.Body as Readable);
  expect(content).toEqual('Hello from AWS SDK!');
});

tap.test('should delete the object', async () => {
  const response = await s3Client.send(new DeleteObjectCommand({
    Bucket: 'test-bucket',
    Key: 'test-file.txt',
  }));
  expect(response.$metadata.httpStatusCode).toEqual(204);
});

tap.test('should fail to get deleted object', async () => {
  await expect(
    s3Client.send(new GetObjectCommand({
      Bucket: 'test-bucket',
      Key: 'test-file.txt',
    }))
  ).rejects.toThrow();
});

tap.test('should delete the bucket', async () => {
  const response = await s3Client.send(new DeleteBucketCommand({ Bucket: 'test-bucket' }));
  expect(response.$metadata.httpStatusCode).toEqual(204);
});

tap.test('should stop the S3 server', async () => {
  await testSmarts3Instance.stop();
});

export default tap.start();