@startuml event-AI추천요청
!theme mono

title Event Service - AI 추천 요청 (Kafka Job 발행) (UFR-EVENT-030)

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}/ai-recommendations
Controller -> Service: requestAIRecommendation(eventDraftId, userId)
activate Service

Service -> Repo: findById(eventDraftId)
activate Repo
Repo -> DB: 이벤트 초안 조회\n(초안ID와 사용자ID로 조회)
activate DB
DB --> Repo: EventDraft
deactivate DB
Repo --> Service: EventDraft entity
deactivate Repo

Service -> Service: validateOwnership(userId, eventDraft)
note right: 사용자 권한 검증

Service -> JobSvc: createAIJob(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(ai-job,\n{jobId, eventDraftId, objective,\nindustry, region, storeInfo})
activate Kafka
note right: Kafka Job Topic:\nai-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: AI Service는 백그라운드에서\nKafka ai-job 토픽을 구독하여\n비동기로 처리

@enduml