import { S3Client } from '@aws-sdk/client-s3';
import { NodeHttpHandler } from '@smithy/node-http-handler';
import { NextRequest } from 'next/server';
import { Readable } from 'stream';
import https from 'https';

export function getS3Client() {
  return new S3Client({
    region: process.env.AWS_REGION,
    credentials: { 
      accessKeyId: process.env.AWS_ACCESS_KEY_ID!, 
      secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY! 
    },
    maxAttempts: 3,
    requestHandler: new NodeHttpHandler({
      connectionTimeout: 10000,
      socketTimeout: 60000,
      httpsAgent: new https.Agent({
        keepAlive: true,
        maxSockets: 50  // Erhöhe parallele Verbindungen
      })
    })
  });
}

export function authenticate(req: NextRequest) {
  const auth = req.headers.get('Authorization');
  console.log('Received Auth Header:', auth);  // Logge den Header
  console.log('Expected Password:', process.env.APP_PASSWORD);  // Logge das Env-Passwort (Achtung: Sensibel, nur für Debug!)
  if (!auth || !auth.startsWith('Basic ')) return false;
  const [user, pass] = Buffer.from(auth.slice(6), 'base64').toString().split(':');
  return user === 'admin' && pass === process.env.APP_PASSWORD;
}

export async function getBody(stream: Readable): Promise<Buffer> {
  console.log('Getting body from stream...');
  return new Promise((resolve, reject) => {
    const chunks: Buffer[] = [];
    stream.on('data', chunk => chunks.push(chunk));
    stream.on('error', reject);
    stream.on('end', () => {
      console.log('Body fetched, size:', Buffer.concat(chunks).length);
      resolve(Buffer.concat(chunks));
    });
  });
}