@startuml
!theme mono

title 최종 회의록 확정 내부 시퀀스

participant "API Gateway<<E>>" as Gateway
participant "MeetingController" as Controller
participant "MeetingService" as Service
participant "Meeting" as Domain
participant "TranscriptService" as TranscriptService
participant "MeetingRepository" as Repository
database "PostgreSQL<<E>>" as DB
database "Redis Cache<<E>>" as Cache
queue "Event Hub<<E>>" as EventHub

Gateway -> Controller: POST /api/meetings/{id}/confirm
activate Controller

Controller -> Service: confirmTranscript(meetingId)
activate Service

Service -> Repository: findById(meetingId)
activate Repository
Repository -> DB: SELECT * FROM meetings WHERE id = ?
activate DB
DB --> Repository: meeting_row
deactivate DB
Repository --> Service: Meeting entity
deactivate Repository

Service -> Domain: confirmTranscript()
activate Domain

Domain -> Domain: validateCanConfirm()
note right of Domain
도메인 규칙:
- COMPLETED 상태 검증
- 작성자 권한 검증
- 회의록 존재 여부 확인
end note

Domain -> Domain: changeStatus(CONFIRMED)

Domain --> Service: updated Meeting
deactivate Domain

Service -> TranscriptService: lockTranscript(meetingId)
activate TranscriptService
note right of TranscriptService
회의록 잠금:
- 더 이상 수정 불가
- 버전 고정
end note
TranscriptService --> Service: lockedTranscript
deactivate TranscriptService

Service -> Repository: save(meeting)
activate Repository
Repository -> DB: UPDATE meetings SET status = 'CONFIRMED', confirmed_at = ?
activate DB
DB --> Repository: affected_rows
deactivate DB
Repository --> Service: savedMeeting
deactivate Repository

Service -> Cache: set(meeting:{id}, meetingData)
activate Cache
Cache --> Service: OK
deactivate Cache

Service ->> EventHub: publish(TranscriptConfirmedEvent)
activate EventHub
note right of EventHub
비동기 이벤트:
- 참석자에게 최종본 알림
- 공유 서비스로 전송
end note
deactivate EventHub

Service --> Controller: MeetingResponse
deactivate Service

Controller --> Gateway: 200 OK
deactivate Controller

@enduml