package webapi;
   
   import java.util.List;
   import java.util.Map;
   
   import javax.enterprise.context.ApplicationScoped;
   
   @ApplicationScoped
   public class ProductResource implements ProcutEndPointSpec {
  
      private static final int TYPE_NOMAL = 1;
      private static final int TYPE_SILVER = 2;
      private static final int TYPE_GOLD = 3;
  
      private static final Map<Integer, Integer> TYPE_DISCOUNT_RATE_MAP = Map.of(
                  TYPE_NOMAL, 10,
                  TYPE_SILVER, 20,
                  TYPE_GOLD, 30
              );
  
      @Override
      public List<Integer> calculatePrice(String memberNo, int price) {
          int memberType;
          switch (memberNo) {
              case "A0001":
                  memberType = TYPE_NOMAL;
                  break;
              case "A0002":
                  memberType = TYPE_SILVER;
                  break;
              case "A0003":
                  memberType = TYPE_GOLD;
                  break;
              default:
                  memberType = TYPE_NOMAL;
          }
  
          // 意図的にstopBugsの警告を出す
          if (memberNo == "A0001") {
              return null;
          }
  
          int discountRate = TYPE_DISCOUNT_RATE_MAP.get(memberType);
          int discountPrice = (int) (price * ((100.0 - discountRate) /100));
          return List.of(
                      discountPrice,
                      memberType,
                      discountRate
                  );
      }
  }