import { NextRequest, NextResponse } from 'next/server';
import { uploadFileToS3, generateFileKey } from '@/lib/s3';

export async function POST(request: NextRequest) {
  try {
    const formData = await request.formData();
    const file = formData.get('file') as File;
    const folder = formData.get('folder') as string || 'audio';

    if (!file) {
      return NextResponse.json({ error: 'No file provided' }, { status: 400 });
    }

    // Validate file type (audio only)
    const allowedTypes = [
      'audio/mpeg',
      'audio/mp3',
      'audio/wav',
      'audio/ogg',
      'audio/flac',
      'audio/aac',
      'audio/m4a',
    ];
    if (!allowedTypes.includes(file.type)) {
      return NextResponse.json(
        { error: 'Invalid file type. Only audio files are allowed.' },
        { status: 400 }
      );
    }

    // Validate file size (max 50MB for audio)
    const maxSize = 50 * 1024 * 1024; // 50MB
    if (file.size > maxSize) {
      return NextResponse.json(
        { error: 'File too large. Maximum size is 50MB.' },
        { status: 400 }
      );
    }

    // Generate unique key
    const key = generateFileKey(folder, file.name);

    // Upload to S3
    const url = await uploadFileToS3({
      file,
      key,
      contentType: file.type,
    });

    return NextResponse.json({ url, key }, { status: 200 });
  } catch (error) {
    console.error('Audio upload error:', error);
    return NextResponse.json(
      { error: 'Failed to upload audio file' },
      { status: 500 }
    );
  }
}