Artifacts

import { NextResponse } from "next/server";
import { readLogs, SessionError } from "@/lib/sessions/manager";
import { LOG_TAIL_BYTES } from "@/lib/sessions/config";

/**
 * Log tail endpoint — polled by the read-only log viewer.
 *
 *   GET /api/sessions/:id/logs?bytes=N → the trailing N bytes of stdout/stderr,
 *   plus the current status and last-activity timestamp.
 *
 * No websocket: the viewer simply re-requests every few seconds.
 */

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

export async function GET(
  request: Request,
  { params }: { params: { id: string } },
) {
  const url = new URL(request.url);
  const bytesParam = Number(url.searchParams.get("bytes"));
  const maxBytes =
    Number.isFinite(bytesParam) && bytesParam > 0
      ? Math.min(bytesParam, 1024 * 1024)
      : LOG_TAIL_BYTES;

  try {
    const logs = readLogs(params.id, maxBytes);
    return NextResponse.json(logs);
  } catch (err) {
    if (err instanceof SessionError) {
      return NextResponse.json({ error: err.message }, { status: err.status });
    }
    const message = err instanceof Error ? err.message : "Unknown error";
    return NextResponse.json({ error: message }, { status: 500 });
  }
}