import Foundation

enum DefaultContainer {
    private static let credentials: any CredentialStore = FileCredentialStore(
        location: documentFileURL("credentials.json")
    )

    private static let logStore: any LogStore = FileLogStore(
        location: documentFileURL("log-center.json")
    )

    static func documentFileURL(_ name: String) -> URL {
        let directory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
        return directory.appendingPathComponent(name)
    }

    @MainActor
    static func makeFleetModel() -> FleetViewModel {
        purgeLegacyGrouping()
        return FleetViewModel(
            repository: FileInstanceRepository(location: documentFileURL("instances.json")),
            probe: ConnectionProbe(client: SimAdminClient()),
            credentials: credentials,
            deviceService: DeviceService(
                client: SimAdminClient(),
                sessions: InstanceSessionStore(),
                credentials: credentials
            )
        )
    }

    /// 0.2.2 起分组被标签取代，遗留的分组文件与偏好键一次性清掉，避免 Documents 里留死数据。
    private static func purgeLegacyGrouping() {
        try? FileManager.default.removeItem(at: documentFileURL("instance-groups.json"))
        UserDefaults.standard.removeObject(forKey: "fleet.groupMode")
    }

    @MainActor
    static func makeMessagesModel() -> MessagesViewModel {
        MessagesViewModel(
            repository: FileInstanceRepository(location: documentFileURL("instances.json")),
            service: MessageService(
                client: SimAdminClient(),
                sessions: InstanceSessionStore(),
                credentials: credentials
            )
        )
    }

    @MainActor
    static func makeLogsModel(autoRefreshOnAppear: Bool = true) -> LogsViewModel {
        let store = logStore
        return LogsViewModel(
            repository: FileInstanceRepository(location: documentFileURL("instances.json")),
            service: LogCenterService(
                client: SimAdminClient(),
                sessions: InstanceSessionStore(),
                credentials: credentials,
                store: store
            ),
            store: store,
            autoRefreshOnAppear: autoRefreshOnAppear
        )
    }

    @MainActor
    static func makeSettingsModel() -> SettingsViewModel {
        SettingsViewModel(store: logStore)
    }

    @MainActor
    static func makeDeviceModel(instance: Instance) -> DeviceViewModel {
        DeviceViewModel(
            instance: instance,
            service: DeviceService(
                client: SimAdminClient(),
                sessions: InstanceSessionStore(),
                credentials: credentials
            ),
            probe: ConnectionProbe(client: SimAdminClient())
        )
    }
}