import CoreDomain
import CoreModel
import CoreRepository
import FeatureAuth
import FeatureCheckin
import FeatureHome
import FeaturePlan
import FeatureProfile

/// 手写组合根 / DI 容器（对应 Android Hilt 的 AppContainer）。
@MainActor
public enum AppContainer {
    // 共享的有状态仓库（登录态、打卡、计划可提交，需跨页面共享单例）。
    private static let sessionRepository: SessionRepository = FakeSessionRepository()
    private static let checkinRepository: CheckinRepository = FakeCheckinRepository()
    private static let planRepository: PlanRepository = FakePlanRepository()

    private static let sessionUseCase = SessionUseCase(repository: sessionRepository)
    private static let checkinUseCase = CheckinUseCase(repository: checkinRepository)
    private static let planUseCase = PlanUseCase(repository: planRepository)

    public static func makeHomeViewModel() -> HomeViewModel {
        let repository: HomeRepository = FakeHomeRepository()
        let useCase = HomeUseCase(repository: repository)
        return HomeViewModel(homeUseCase: useCase, sessionUseCase: sessionUseCase)
    }

    public static func makeCheckinViewModel() -> CheckinViewModel {
        CheckinViewModel(checkinUseCase: checkinUseCase, sessionUseCase: sessionUseCase)
    }

    public static func makePlanViewModel() -> PlanViewModel {
        PlanViewModel(planUseCase: planUseCase, sessionUseCase: sessionUseCase)
    }

    public static func makeProfileViewModel() -> ProfileViewModel {
        let repository: ProfileRepository = FakeProfileRepository()
        let useCase = ProfileUseCase(repository: repository)
        return ProfileViewModel(profileUseCase: useCase, sessionUseCase: sessionUseCase)
    }

    public static func makeAuthViewModel() -> AuthViewModel {
        AuthViewModel(sessionUseCase: sessionUseCase)
    }

    public static func makePlanSubmitViewModel(type: PlanType, periodKey: String) -> PlanSubmitViewModel {
        PlanSubmitViewModel(planUseCase: planUseCase, type: type, periodKey: periodKey)
    }
}