import { CURRENCY_SHORT } from "./constants";

/** Format fictional credits: 10000 -> "10,000 SC". Never uses a currency sign. */
export function formatSC(amount: number | bigint | string, opts: { unit?: boolean } = {}): string {
  const n = typeof amount === "bigint" ? Number(amount) : typeof amount === "string" ? Number(amount) : amount;
  const s = Math.trunc(n).toLocaleString("en-US");
  return opts.unit === false ? s : `${s} ${CURRENCY_SHORT}`;
}

/** Compact: 1250000 -> "1.25M" */
export function formatCompact(n: number): string {
  if (Math.abs(n) >= 1_000_000) return `${(n / 1_000_000).toFixed(2).replace(/\.?0+$/, "")}M`;
  if (Math.abs(n) >= 10_000) return `${(n / 1_000).toFixed(1).replace(/\.?0+$/, "")}K`;
  return Math.trunc(n).toLocaleString("en-US");
}

export function formatMultiplier(m: number): string {
  if (m >= 100) return `${Math.round(m).toLocaleString("en-US")}×`;
  if (m >= 10) return `${m.toFixed(1).replace(/\.0$/, "")}×`;
  return `${m.toFixed(2).replace(/\.?0+$/, "")}×`;
}

export function formatPercent(p: number, digits = 2): string {
  return `${(p * 100).toFixed(digits)}%`;
}