// udeServer: DeleteService 走事务 —— 同一事务内先删该服务下的 t_directory,
// 再删 t_service。任一步失败全部回滚,不会残留孤儿目录数据。

package logic

import (
	"context"
	"fmt"

	"udeServer/internal/svc"
	"udeServer/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

type DeleteServiceLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewDeleteServiceLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeleteServiceLogic {
	return &DeleteServiceLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *DeleteServiceLogic) DeleteService(req *types.ServiceIdReq) (*types.DeleteResp, error) {
	if err := checkId(req.Id); err != nil {
		return nil, err
	}
	if _, err := findService(l.ctx, l.svcCtx.ServiceModel, req.Id); err != nil {
		return nil, err
	}

	err := l.svcCtx.DB.Transact(func(session sqlx.Session) error {
		dirModel := l.svcCtx.DirectoryModel.WithSession(session)
		svcModel := l.svcCtx.ServiceModel.WithSession(session)

		if err := dirModel.DeleteByServiceId(l.ctx, req.Id); err != nil {
			return fmt.Errorf("delete t_directory of service %d: %w", req.Id, err)
		}
		if err := svcModel.Delete(l.ctx, req.Id); err != nil {
			return fmt.Errorf("delete t_service %d: %w", req.Id, err)
		}
		return nil
	})
	if err != nil {
		l.Errorf("delete service tx failed: %v", err)
		return nil, err
	}

	return &types.DeleteResp{Ok: true}, nil
}