import { performAction, queueLeg } from '@/lib/game/actions';

// POST /api/planes/:planeId/queue (v0.25.0, ISS-043) — body { destIcao: string }.
// Appends a NOT-yet-started leg to the plane's flight queue; works whether the
// plane is grounded or flying (pre-building a route). Nothing auto-starts here —
// queued legs chain on landing when fuel covers them. 400 missing/non-string
// destIcao, unknown fields, or an ICAO not in the airport dataset; 404 unknown
// plane id. On success returns the full state snapshot (plane.queue updated).

export async function POST(req: Request, ctx: { params: Promise<{ planeId: string }> }) {
  const { planeId } = await ctx.params;

  let body: unknown;
  try {
    const text = await req.text();
    body = text ? JSON.parse(text) : {};
  } catch {
    return Response.json({ error: 'invalid JSON body' }, { status: 400 });
  }
  if (typeof body !== 'object' || body === null || Array.isArray(body)) {
    return Response.json({ error: 'body must be a JSON object' }, { status: 400 });
  }
  const input = body as Record<string, unknown>;
  for (const key of Object.keys(input)) {
    if (key !== 'destIcao') {
      return Response.json({ error: `unknown field "${key}"` }, { status: 400 });
    }
  }
  if (typeof input.destIcao !== 'string' || input.destIcao.length === 0) {
    return Response.json({ error: 'destIcao must be a non-empty string' }, { status: 400 });
  }

  const destIcao = input.destIcao;
  return performAction(req, (inst) => queueLeg(inst, planeId, destIcao));
}