@startuml event-이미지생성요청
!theme mono

title Event Service - 이미지 생성 요청 (Kafka Job 발행) (UFR-CONT-010)

participant "EventController" as Controller <<C>>
participant "EventService" as Service <<S>>
participant "JobService" as JobSvc <<S>>
participant "EventRepository" as Repo <<R>>
participant "Redis Cache" as Cache <<E>>
database "Event DB" as DB <<E>>
participant "Kafka Producer" as Kafka <<E>>

note over Controller: POST /api/events/{id}/content-generation
Controller -> Service: requestImageGeneration(eventDraftId, userId)
activate Service

Service -> Repo: findById(eventDraftId)
activate Repo
Repo -> DB: SELECT * FROM event_drafts\nWHERE id = ? AND user_id = ?
activate DB
DB --> Repo: EventDraft
deactivate DB
Repo --> Service: EventDraft entity
deactivate Repo

Service -> Service: validateOwnership(userId, eventDraft)
Service -> Service: validateRecommendationSelected()
note right: AI 추천 선택 여부 확인

Service -> JobSvc: createImageJob(eventDraft)
activate JobSvc

JobSvc -> JobSvc: generateJobId()
note right: UUID 생성

JobSvc -> Cache: set("job:" + jobId,\n{status: PENDING, createdAt}, TTL=1시간)
activate Cache
Cache --> JobSvc: OK
deactivate Cache

JobSvc -> Kafka: publish(image-job,\n{jobId, eventDraftId, title, prize,\nbrandColor, logoUrl, storeInfo})
activate Kafka
note right: Kafka Job Topic:\nimage-job-topic
Kafka --> JobSvc: ACK
deactivate Kafka

JobSvc --> Service: JobResponse\n{jobId, status: PENDING}
deactivate JobSvc

Service --> Controller: JobResponse\n{jobId, status: PENDING}
deactivate Service
Controller --> Client: 202 Accepted\n{jobId, status: PENDING}

note over Controller, Kafka: Content Service는 백그라운드에서\nKafka image-job 토픽을 구독하여\n3가지 스타일 이미지 생성\n(심플, 화려한, 트렌디)

@enduml