import { NextRequest, NextResponse } from 'next/server';
import { getSessionData } from '@/app/actions/session';
import { API_BASE_URL } from '@/app/actions/definitions';

export async function GET(
	request: NextRequest,
	{ params }: { params: Promise<{ id: string }> }
) {
	try {
		const token = await getSessionData('token');

		if (!token) {
			return NextResponse.json(
				{ error: 'need authorization' },
				{ status: 401 }
			);
		}

		const { id } = await params;

		const response = await fetch(`${API_BASE_URL}/api/v1/files/download/${id}`, {
			method: 'GET',
			headers: {
				"Authorization": token
			}
		});

		if (!response.ok) {
			throw new Error(`backend error: ${response.status}`);
		}

		const fileBlob = await response.blob();
		const headers = new Headers(response.headers);

		return new NextResponse(fileBlob, {
			status: 200,
			headers: {
				'Content-Type': headers.get('content-type') || 'application/octet-stream',
				'Content-Disposition': headers.get('content-disposition') || `attachment; filename="file-${id}"`,
				'Content-Length': headers.get('content-length') || String(fileBlob.size),
			},
		});

	} catch (error) {
		console.error('download error:', error);
		return NextResponse.json(
			{ error: 'download file error' },
			{ status: 500 }
		);
	}
}