import Foundation
import Combine

final class SettingsStore: ObservableObject {
    @Published var serverURL: String {
        didSet { UserDefaults.standard.set(serverURL, forKey: Keys.serverURL) }
    }
    @Published var voiceID: String {
        didSet { UserDefaults.standard.set(voiceID, forKey: Keys.voiceID) }
    }
    @Published var modelID: String? {
        didSet { UserDefaults.standard.set(modelID, forKey: Keys.modelID) }
    }
    @Published var textMode: Bool {
        didSet { UserDefaults.standard.set(textMode, forKey: Keys.textMode) }
    }
    @Published var volume: Double {
        didSet { UserDefaults.standard.set(volume, forKey: Keys.volume) }
    }

    private enum Keys {
        static let serverURL = "serverURL"
        static let voiceID = "voiceID"
        static let modelID = "modelID"
        static let textMode = "textMode"
        static let volume = "volume"
    }

    static let defaultServerURL = "https://192.168.86.2:9178"

    init() {
        let d = UserDefaults.standard
        // Sanitize legacy values: earlier versions wrote the field to storage on
        // every keystroke, so an invalid half-typed URL could be persisted and
        // shipped to the network layer. Fall back to the documented default and
        // repair the stored value once.
        let storedURL = d.string(forKey: Keys.serverURL) ?? Self.defaultServerURL
        switch ServerConfig.parse(storedURL) {
        case .success:
            serverURL = storedURL
        case .failure:
            // Legacy invalid value: repair to the documented default.
            serverURL = Self.defaultServerURL
            d.set(Self.defaultServerURL, forKey: Keys.serverURL)
        }
        let storedVoice = d.string(forKey: Keys.voiceID)
        voiceID = Voices.all.contains { $0.id == storedVoice } ? (storedVoice ?? "") : Voices.defaultID
        modelID = d.string(forKey: Keys.modelID)
        textMode = d.bool(forKey: Keys.textMode)
        volume = d.object(forKey: Keys.volume) as? Double ?? 0.8
    }

    var trimmedServerURL: String {
        serverURL.trimmingCharacters(in: .whitespacesAndNewlines)
    }
}