import type { NewPromotion, Promotion, PromotionDiscount } from './promotion.js';

export interface PromotionService {
  create(input: NewPromotion): Promise<Promotion>;
  calculateDiscount(code: string, cartTotalCents: number, now?: Date): Promise<PromotionDiscount>;
  validateCode(code: string, now?: Date): Promise<Promotion>;
  list(): Promise<Promotion[]>;
  update(code: string, patch: Partial<NewPromotion>): Promise<Promotion>;
  delete(code: string): Promise<void>;
}

export interface PromotionRepository {
  findByCode(code: string): Promise<Promotion | undefined>;
  create(input: NewPromotion): Promise<Promotion>;
  findAll(): Promise<Promotion[]>;
  update(code: string, patch: Partial<NewPromotion>): Promise<Promotion>;
  delete(code: string): Promise<void>;
}