Offer Semuta on native Advanced advisor conversion costs

game/semuta-advisor-arrival.ts

@@ -0,0 +1,28 @@
+import type { Game, ResponseWindow } from './engine';
+import { location, validGameLocation } from './board';
+
+/** A completed ground move keeps its original arrival behind mandatory
+ * conversion. This validates that deposited group without moving it again. */
+export function semutaAdvisorArrivalSupported(g: Game, response: ResponseWindow): boolean {
+  const arrivals = g.pendingArrivalReaction;
+  if (!arrivals?.length) return true;
+  const source = response.automaticAdvisorFlip;
+  if (response.kind !== 'advisorFlip' || source?.producer !== 'groundMovement' ||
+      !g.advanced || g.phase !== 5 || !Array.isArray(arrivals) || arrivals.length !== 1) return false;
+  const entry = arrivals[0];
+  if (!entry || Object.keys(entry).sort().join(',') !==
+      'amount,cause,elite,entrant,phase,resume,sector,territory,turn' ||
+      entry.turn !== g.turn || entry.phase !== g.phase ||
+      entry.cause !== 'movement' || entry.resume !== 'none' ||
+      entry.entrant !== source.mover || entry.entrant !== g.active ||
+      !Number.isSafeInteger(entry.amount) || entry.amount <= 0 || entry.amount > 20 ||
+      !Number.isSafeInteger(entry.elite) || entry.elite < 0 || entry.elite > entry.amount ||
+      !validGameLocation(g,entry.territory,entry.sector)) return false;
+  const mover = g.players.find(p => p.id === source.mover);
+  if (!mover || mover.shipped !== true || mover.moved !== source.move ||
+      !g.movementRemaining?.includes(mover.id)) return false;
+  const key = location(entry.territory,entry.sector), total = mover.forces[key] ?? 0,
+    elite = mover.elites?.forces[key] ?? 0;
+  return total >= entry.amount && elite >= entry.elite &&
+    total - elite >= entry.amount - entry.elite;
+}