' ============================================================
' WALKGUIDE — DESIGN PATTERNS (GoF)
' Flutter × Spring Boot × In-Device AI
' Pattern 3 of 7: FACADE (Structural)
' ============================================================

@startuml WalkGuide_03_Facade

skinparam monochrome false
skinparam shadowing false
skinparam defaultFontName Arial
skinparam defaultFontSize 12
skinparam roundCorner 10
skinparam ArrowColor #555555
skinparam ArrowThickness 1.2

skinparam class {
    BackgroundColor #FAFAFA
    BorderColor #AAAAAA
    HeaderBackgroundColor #E8E8E8
    FontColor #222222
    StereotypeFontColor #666666
    AttributeFontColor #333333
}

skinparam package {
    BackgroundColor #F5F5F5
    BorderColor #888888
    FontColor #333333
    FontStyle bold
}

skinparam note {
    BackgroundColor #FFFDE7
    BorderColor #F9A825
    FontColor #444444
    FontSize 11
}

' ============================================================
' PATTERN 3 — FACADE (Structural) — Flutter
' ============================================================

package "③  Facade Pattern  [Structural]" #FFF8E1 {

    class "VoiceCommandHandler\n<<Facade>>" as VoiceCommandHandler {
        - _ttsService : TtsService
        - _sttService : SttService
        - _router : GoRouter
        - _walkGuideBloc : WalkGuideBloc
        - _sosBloc : SosBloc
        - _notifBloc : NotificationBloc
        + processText(String command) : void
        - _matchCommand(String) : VoiceCommandKey?
        - _executeCommand(VoiceCommandKey) : void
    }

    class "WalkGuideBloc\n<<Client>>" as WalkGuideBlocFacade {
        + onVoiceCommand(String text)
    }

    class "GuardianDashboardService\n<<Facade>>" as GuardianDashboardService {
        - _locationService : LocationService
        - _activityService : ActivityLogService
        - _sosService : SosService
        - _notifService : NotificationService
        + getDashboard(guardianId) : DashboardResponse
    }

    class "SttService " as SttServiceFacade <<Subsystem>>
    class "TtsService " as TtsServiceFacade <<Subsystem>>
    class "GoRouter\n<<Router>>" as GoRouterFacade <<Subsystem>>
    class "SosBloc " as SosBlocFacade <<Subsystem>>

    class "LocationService\n<<Service>>" as LocationService <<Subsystem>>
    class "ActivityLogService\n<<Service>>" as ActivityService <<Subsystem>>
    class "SosService\n<<Service>>" as SosServiceFacade <<Subsystem>>

    WalkGuideBlocFacade --> VoiceCommandHandler : processText()
    VoiceCommandHandler --> SttServiceFacade : delegates
    VoiceCommandHandler --> TtsServiceFacade : delegates
    VoiceCommandHandler --> GoRouterFacade : delegates
    VoiceCommandHandler --> SosBlocFacade : delegates

    GuardianDashboardService --> LocationService : aggregates
    GuardianDashboardService --> ActivityService : aggregates
    GuardianDashboardService --> SosServiceFacade : aggregates
}

note right of VoiceCommandHandler
  Client hanya panggil processText("start walkguide")
  tanpa perlu tahu kompleksitas di baliknya:
  matching phrase → execute command → TTS feedback
  → route navigation → BLoC event dispatch
end note

@enduml