import { NextRequest, NextResponse } from 'next/server';

export async function GET(req: NextRequest) {
    const { searchParams } = new URL(req.url);
    const url = searchParams.get('url');
    const filename = searchParams.get('filename') || 'download';
    
    if (!url) {
        return NextResponse.json({ error: 'URL is required' }, { status: 400 });
    }

    try {
        const response = await fetch(url);
        
        if (!response.ok) {
            throw new Error(`Remote server responded with ${response.status}`);
        }

        const arrayBuffer = await response.arrayBuffer();
        const contentType = response.headers.get('content-type') || 'application/octet-stream';

        return new NextResponse(Buffer.from(arrayBuffer), {
            headers: {
                'Content-Type': contentType,
                'Content-Disposition': `attachment; filename="${filename}"`,
                'Content-Length': arrayBuffer.byteLength.toString(),
                'Cache-Control': 'no-cache, no-store, must-revalidate',
                'Pragma': 'no-cache',
                'Expires': '0',
            },
        });
    } catch (error: any) {
        console.error('Download proxy error:', error);
        return NextResponse.json({ error: error.message }, { status: 500 });
    }
}