package coupon

import (
	"cls-server/internal/domain/coupon"
	"cls-server/internal/domain/user"
	"cls-server/pkg/logger"
)

// CouponService 优惠券应用服务
type CouponService struct {
	repo     coupon.CouponRepository
	userRepo user.UserRepository
	log      logger.Logger
}

// NewCouponService 创建优惠券应用服务
func NewCouponService(repo coupon.CouponRepository, userRepo user.UserRepository, log logger.New) *CouponService {
	return &CouponService{
		repo:     repo,
		userRepo: userRepo,
		log:      log("cls:service:coupon"),
	}
}

// CreateCoupon 创建优惠券
func (s *CouponService) CreateCoupon(req *CouponDto) error {
	_, err := s.userRepo.FindByID(req.UserId)
	if err != nil {
		s.log.Error(err)
		return err
	}
	coupon := &coupon.Coupon{
		Name:      req.Name,
		Type:      req.Type,
		Value:     req.Value,
		MinAmount: req.MinAmount,
		StartTime: req.StartTime,
		EndTime:   req.EndTime,
		AdminID:   req.AdminId,
		UserID:    req.UserId,
		Status:    coupon.CouponStatusNormal,
	}
	if err := s.repo.Create(coupon); err != nil {
		s.log.Error(err)
		return err
	}
	return nil
}

// IssueCouponRequest 发放优惠券请求
type IssueCouponRequest struct {
	CouponID uint64 `json:"couponId"` // 优惠券ID
	UserID   uint64 `json:"userId"`   // 用户ID
}

// GetUserCoupons 获取用户的优惠券列表
func (s *CouponService) GetUserCoupons(ePhone string) ([]*CouponDto, error) {
	user, err := s.userRepo.FindByPhone(ePhone)
	if err != nil {
		s.log.Error(err)
		return nil, err
	}
	coupons, err := s.repo.ListByUserID(user.Id)
	if err != nil {
		s.log.Error(err)
		return nil, err
	}
	var resp []*CouponDto
	for _, c := range coupons {
		if c.Status == coupon.CouponStatusNormal {
			resp = append(resp, &CouponDto{
				Id:        c.ID,
				Name:      c.Name,
				Type:      c.Type,
				Value:     c.Value,
				MinAmount: c.MinAmount,
				StartTime: c.StartTime,
				EndTime:   c.EndTime,
				Status:    c.Status,
			})
		}
	}
	return resp, nil
}