junhong_cmp_fiber/internal/service/device/binding.go

package device

import (
	"context"

	"github.com/break/junhong_cmp_fiber/internal/model"
	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/logger"
	"go.uber.org/zap"
	"gorm.io/gorm"
)

func (s *Service) ListBindings(ctx context.Context, deviceID uint) (*dto.ListDeviceCardsResponse, error) {
	device, err := s.deviceStore.GetByID(ctx, deviceID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeNotFound, "设备不存在")
		}
		return nil, err
	}

	bindings, err := s.deviceSimBindingStore.ListByDeviceID(ctx, device.ID)
	if err != nil {
		return nil, err
	}

	cardIDs := make([]uint, 0, len(bindings))
	for _, binding := range bindings {
		cardIDs = append(cardIDs, binding.IotCardID)
	}

	var cards []*model.IotCard
	if len(cardIDs) > 0 {
		cards, err = s.iotCardStore.GetByIDs(ctx, cardIDs)
		if err != nil {
			return nil, err
		}
	}

	cardMap := make(map[uint]*model.IotCard)
	for _, card := range cards {
		cardMap[card.ID] = card
	}

	responses := make([]*dto.DeviceCardBindingResponse, 0, len(bindings))
	for _, binding := range bindings {
		card := cardMap[binding.IotCardID]
		if card == nil {
			continue
		}

		resp := &dto.DeviceCardBindingResponse{
			ID:           binding.ID,
			SlotPosition: binding.SlotPosition,
			IotCardID:    binding.IotCardID,
			ICCID:        card.ICCID,
			MSISDN:       card.MSISDN,
			CarrierName:  card.CarrierName, // 直接使用 IotCard 的冗余字段
			Status:       card.Status,
			BindTime:     binding.BindTime,
			IsCurrent:    binding.IsCurrent,
		}
		responses = append(responses, resp)
	}

	return &dto.ListDeviceCardsResponse{
		Bindings: responses,
	}, nil
}

func (s *Service) BindCard(ctx context.Context, deviceID uint, req *dto.BindCardToDeviceRequest) (*dto.BindCardToDeviceResponse, error) {
	device, err := s.deviceStore.GetByID(ctx, deviceID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeNotFound, "设备不存在")
		}
		return nil, err
	}

	if req.SlotPosition > device.MaxSimSlots {
		return nil, errors.New(errors.CodeInvalidParam, "插槽位置超出设备最大插槽数")
	}

	existingBinding, err := s.deviceSimBindingStore.GetByDeviceAndSlot(ctx, device.ID, req.SlotPosition)
	if err != nil && err != gorm.ErrRecordNotFound {
		return nil, err
	}
	if existingBinding != nil {
		return nil, errors.New(errors.CodeConflict, "该插槽已有绑定的卡")
	}

	card, err := s.iotCardStore.GetByID(ctx, req.IotCardID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeIotCardNotFound)
		}
		return nil, err
	}

	activeBinding, err := s.deviceSimBindingStore.GetActiveBindingByCardID(ctx, card.ID)
	if err != nil && err != gorm.ErrRecordNotFound {
		return nil, err
	}
	if activeBinding != nil {
		return nil, errors.New(errors.CodeIotCardBoundToDevice, "该卡已绑定到其他设备")
	}

	binding := &model.DeviceSimBinding{
		DeviceID:     device.ID,
		IotCardID:    card.ID,
		SlotPosition: req.SlotPosition,
		BindStatus:   1,
	}

	if err := s.deviceSimBindingStore.Create(ctx, binding); err != nil {
		return nil, err
	}

	// 异步快照维护：更新卡上的设备虚拟号，失败不阻断主流程
	if updateErr := s.iotCardStore.UpdateDeviceVirtualNo(ctx, card.ID, device.VirtualNo); updateErr != nil {
		logger.GetAppLogger().Warn("更新卡的设备虚拟号快照失败",
			zap.Uint("card_id", card.ID),
			zap.Uint("device_id", device.ID),
			zap.Error(updateErr),
		)
	}

	return &dto.BindCardToDeviceResponse{
		BindingID: binding.ID,
		Message:   "绑定成功",
	}, nil
}

func (s *Service) UnbindCard(ctx context.Context, deviceID uint, cardID uint) (*dto.UnbindCardFromDeviceResponse, error) {
	device, err := s.deviceStore.GetByID(ctx, deviceID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeNotFound, "设备不存在")
		}
		return nil, err
	}

	binding, err := s.deviceSimBindingStore.GetByDeviceAndCard(ctx, device.ID, cardID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, errors.New(errors.CodeNotFound, "该卡未绑定到此设备")
		}
		return nil, err
	}

	if err := s.deviceSimBindingStore.Unbind(ctx, binding.ID); err != nil {
		return nil, err
	}

	// 解绑后清空卡的设备虚拟号快照，失败不阻断主流程
	if updateErr := s.iotCardStore.UpdateDeviceVirtualNo(ctx, cardID, ""); updateErr != nil {
		logger.GetAppLogger().Warn("清空卡的设备虚拟号快照失败",
			zap.Uint("card_id", cardID),
			zap.Uint("device_id", deviceID),
			zap.Error(updateErr),
		)
	}

	return &dto.UnbindCardFromDeviceResponse{
		Message: "解绑成功",
	}, nil
}