export type Tier = "free" | "pro";
export type LimitKey = "chat_message" | "tool_call";

export type TierLimits = Record<LimitKey, number>;

export const LIMITS: Record<Tier, TierLimits> = {
  free: {
    chat_message: 10,
    tool_call: 5,
  },
  pro: {
    chat_message: 1000,
    tool_call: 500,
  },
};

export const TIER_LABELS: Record<Tier, string> = {
  free: "Free",
  pro: "Pro",
};

export function todayPeriodKey(now = new Date()): string {
  const y = now.getUTCFullYear();
  const m = String(now.getUTCMonth() + 1).padStart(2, "0");
  const d = String(now.getUTCDate()).padStart(2, "0");
  return `${y}-${m}-${d}`;
}