day 5

src/controllers/Resources/PropDropPlanner.ts

@@ -0,0 +1,65 @@
+function randomInt(min: number, max: number) {
+  return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+function shuffle<T>(items: T[]) {
+  const result = [...items];
+  for (let i = result.length - 1; i > 0; i--) {
+    const j = Math.floor(Math.random() * (i + 1));
+    [result[i], result[j]] = [result[j], result[i]];
+  }
+  return result;
+}
+
+function splitRandom(total: number, parts: number) {
+  if (parts <= 0) return [];
+  if (parts === 1) return [total];
+
+  const result = new Array(parts).fill(1);
+  let remaining = total - parts;
+
+  while (remaining > 0) {
+    result[Math.floor(Math.random() * parts)]++;
+    remaining--;
+  }
+
+  return result;
+}
+
+import { ResourceType } from "./ResourceType";
+
+export type PropDropPlan = {
+  resource: ResourceType;
+  totalDrop: number;
+  spawnedDrop: number;
+  hitAmounts: number[];
+};
+
+export function createDropPlan(
+  maxHealth: number,
+  rule: {
+    resource: ResourceType;
+    minTotal: number;
+    maxTotal: number;
+    minSpawnHits: number;
+    maxSpawnHits: number;
+  },
+): PropDropPlan {
+  const totalDrop = randomInt(rule.minTotal, rule.maxTotal);
+  const spawnEvents = randomInt(rule.minSpawnHits, rule.maxSpawnHits);
+  const hitAmounts = new Array(maxHealth).fill(0);
+
+  const hitIndexes = shuffle([...Array(maxHealth).keys()]).slice(0, spawnEvents);
+  const amounts = splitRandom(totalDrop, spawnEvents);
+
+  hitIndexes.forEach((hitIndex, index) => {
+    hitAmounts[hitIndex] = amounts[index];
+  });
+
+  return {
+    resource: rule.resource,
+    totalDrop,
+    spawnedDrop: 0,
+    hitAmounts,
+  };
+}