@startuml
skinparam packageStyle rectangle

package "thalos-bff" {
  class Program
  interface IIssueTokenHandler
  class IssueTokenHandler
  interface IRefreshSessionHandler
  class RefreshSessionHandler
  interface IPermissionGuard
  interface IIdentityEdgeContractAdapter
  interface IIdentityEdgeGrpcContractAdapter
  interface IThalosServiceClient
  class IssueIdentityTokenGrpcContract

  IssueTokenHandler ..|> IIssueTokenHandler
  RefreshSessionHandler ..|> IRefreshSessionHandler
  IssueTokenHandler --> IPermissionGuard
  IssueTokenHandler --> IIdentityEdgeContractAdapter
  RefreshSessionHandler --> IIdentityEdgeContractAdapter
  IIdentityEdgeGrpcContractAdapter --> IssueIdentityTokenGrpcContract
  IssueTokenHandler --> IThalosServiceClient
  RefreshSessionHandler --> IThalosServiceClient
}

package "Clients" as Clients
package "thalos-service" as ThalosService

Clients --> Program : REST
Program --> IIssueTokenHandler
Program --> IRefreshSessionHandler
IThalosServiceClient ..> ThalosService : gRPC/internal contracts
@enduml