export interface CardConfig {
  id: string;
  name: string;
  networkRate: string | number; // IDR → VND (keep as string in UI for precision)
  usdRate: string | number;     // USD → VND
}

export interface GlobalConfig {
  cashVndUsd: number;
  bcaBeli: number;
  usdAvailable: number;
}

export interface VendorState {
  price: string;
  currency: 'USD' | 'IDR';
  surcharge: boolean;
}

export interface CalculationResult {
  usdNeeded: number;
  cashVnd: number;
  onlineVnd: number;
  posVnd: number;
  isCashPossible: boolean;
  formulas: {
    cash: string;
    online: string;
    pos: string;
  };
}

export interface UserSettings {
  globalConfig: GlobalConfig;
  cards: CardConfig[];
  activeCardId: string;
}