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 || 'uploads';

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

    // Validate file type (images only)
    const allowedTypes = ['image/jpeg', 'image/jpg', 'image/png', 'image/webp', 'image/gif'];
    if (!allowedTypes.includes(file.type)) {
      return NextResponse.json(
        { error: 'Invalid file type. Only images are allowed.' },
        { status: 400 }
      );
    }

    // Validate file size (max 5MB)
    const maxSize = 5 * 1024 * 1024; // 5MB
    if (file.size > maxSize) {
      return NextResponse.json(
        { error: 'File too large. Maximum size is 5MB.' },
        { 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('Upload error:', error);
    return NextResponse.json(
      { error: 'Failed to upload file' },
      { status: 500 }
    );
  }
}