Release v0.1.8 2026-07-13

src/game/bossSelection.ts

@@ -0,0 +1,24 @@
+import { BOSS_DEFINITIONS } from "./bossCatalog";
+import type { BossId, BossMechanicId } from "./types";
+
+/** Mechanics that cannot be resolved safely when two bosses own them at once. */
+export const ENCOUNTER_EXCLUSIVE_MECHANICS: ReadonlySet<BossMechanicId> = new Set(["memory-sequence"]);
+
+export function canAddBossToEncounter(selectedBossIds: readonly BossId[], candidateBossId: BossId) {
+  if (selectedBossIds.includes(candidateBossId)) return false;
+  const candidateMechanics = BOSS_DEFINITIONS[candidateBossId].mechanicIds;
+  for (const mechanicId of candidateMechanics) {
+    if (!ENCOUNTER_EXCLUSIVE_MECHANICS.has(mechanicId)) continue;
+    if (selectedBossIds.some((bossId) => BOSS_DEFINITIONS[bossId].mechanicIds.includes(mechanicId))) return false;
+  }
+  return true;
+}
+
+export function normalizeEncounterBossIds(requestedBossIds: readonly BossId[], limit = 3): BossId[] {
+  const selected: BossId[] = [];
+  for (const bossId of requestedBossIds) {
+    if (selected.length >= limit) break;
+    if (canAddBossToEncounter(selected, bossId)) selected.push(bossId);
+  }
+  return selected.length ? selected : ["bulldrome"];
+}