// ServerSettings.swift
// Jarvis — persists the configured server host

import Foundation

@MainActor
final class ServerSettings: ObservableObject {
    static let shared = ServerSettings()

    private let key = "jarvis_server_host"

    @Published var host: String? {
        didSet { UserDefaults.standard.set(host, forKey: key) }
    }

    var isConfigured: Bool { host != nil }

    private init() {
        host = UserDefaults.standard.string(forKey: key)
    }

    func save(host: String) async throws {
        try await APIClient.shared.configure(host: host)
        _ = try await APIClient.shared.checkHealth()
        self.host = host
        WebSocketManager.shared.connect(host: host)
    }

    func reset() {
        host = nil
        WebSocketManager.shared.disconnect()
    }

    /// Re-establish REST + WebSocket from a previously saved host on app launch.
    func reconnectIfConfigured() async {
        guard let host else { return }
        try? await APIClient.shared.configure(host: host)
        WebSocketManager.shared.connect(host: host)
    }

    /// Point REST + WebSocket at a host the ConnectivityManager already verified
    /// (skips the health check — the probe just confirmed it).
    func activate(host: String) async {
        try? await APIClient.shared.configure(host: host)
        self.host = host
        WebSocketManager.shared.connect(host: host)
    }
}