import 'dotenv/config';
import { prisma } from '../src/lib/prisma';
import * as nodeCrypto from 'crypto';

function generateFileHash(buffer: Buffer): string {
  return nodeCrypto.createHash('md5').update(buffer).digest('hex');
}

/**
 * Replace this with your actual OneDrive download logic!
 */
async function getFromOneDrive(oneDriveId: string): Promise<Buffer> {
  // For now, let's pretend we downloaded it to test the DB update
  // DELETE THESE 2 LINES when you add your real OneDrive fetch code:
  console.log(`   ⬇️  Downloading ${oneDriveId}...`);
  return Buffer.from(`mock-data-for-${oneDriveId}`); 
}

async function backfill() {
  console.log('🏁 Starting backfill with Prisma Adapter...');

  try {
    const files = await prisma.fileNode.findMany({
      where: { isFolder: false, hash: null },
    });

    console.log(`📂 Found ${files.length} files to process.`);

    for (const file of files) {
      try {
        process.stdout.write(`Processing: ${file.name}... `);

        // 1. Get the file content
        const buffer = await getFromOneDrive(file.oneDriveId!);

        // 2. Generate the hash
        const hash = generateFileHash(buffer);

        // 3. Update the database
        await prisma.fileNode.update({
          where: { id: file.id },
          data: { hash: hash }
        });

        console.log(`✅ Success! (Hash: ${hash.substring(0, 8)}...)`);
      } catch (err) {
        console.log(`❌ Failed: ${err instanceof Error ? err.message : err}`);
      }
    }
  } catch (error) {
    console.error('🚨 Script Error:', error);
  } finally {
    await prisma.$disconnect();
    console.log('🏁 Finished.');
  }
}

backfill();