import { PerkId, PerksMap, Upgrade } from "./types";

export function getMajorityValue(arr: string[]): string {
  const count: { [k: string]: number } = {};
  arr.forEach((v) => (count[v] = (count[v] || 0) + 1));
  // Object.values inline polyfill
  const max = Math.max(...Object.keys(count).map((k) => count[k]));
  return sample(Object.keys(count).filter((k) => count[k] == max));
}

export function sample<T>(arr: T[]): T {
  return arr[Math.floor(arr.length * Math.random())];
}

export function sumOfKeys(obj: { [key: string]: number } | undefined | null) {
  if (!obj) return 0;
  return Object.values(obj)?.reduce((a, b) => a + b, 0) || 0;
}

export const makeEmptyPerksMap = (upgrades: { id: PerkId }[]) => {
  const p = {} as any;
  upgrades.forEach((u) => (p[u.id] = 0));
  return p as PerksMap;
};