import Foundation

enum RecognitionLanguage: String, CaseIterable {
    case chineseSimplified  = "zh-CN"
    case english            = "en-US"
    case chineseTraditional = "zh-TW"
    case japanese           = "ja-JP"
    case korean             = "ko-KR"

    var displayName: String {
        switch self {
        case .chineseSimplified:  return "简体中文"
        case .english:            return "English"
        case .chineseTraditional: return "繁體中文"
        case .japanese:           return "日本語"
        case .korean:             return "한국어"
        }
    }
}

struct Config {
    static var shared = Config()

    private let defaults = UserDefaults.standard

    private enum Keys {
        static let language = "recognition_language"
        static let llmEnabled = "llm_enabled"
        static let llmBaseURL = "llm_base_url"
        static let llmAPIKey = "llm_api_key"
        static let llmModel = "llm_model"
    }

    var language: RecognitionLanguage {
        get {
            guard let raw = defaults.string(forKey: Keys.language),
                  let lang = RecognitionLanguage(rawValue: raw) else {
                return .chineseSimplified
            }
            return lang
        }
        set {
            defaults.set(newValue.rawValue, forKey: Keys.language)
        }
    }

    var llmEnabled: Bool {
        get { defaults.bool(forKey: Keys.llmEnabled) }
        set { defaults.set(newValue, forKey: Keys.llmEnabled) }
    }

    var llmBaseURL: String {
        get { defaults.string(forKey: Keys.llmBaseURL) ?? "" }
        set { defaults.set(newValue, forKey: Keys.llmBaseURL) }
    }

    var llmAPIKey: String {
        get { defaults.string(forKey: Keys.llmAPIKey) ?? "" }
        set { defaults.set(newValue, forKey: Keys.llmAPIKey) }
    }

    var llmModel: String {
        get { defaults.string(forKey: Keys.llmModel) ?? "" }
        set { defaults.set(newValue, forKey: Keys.llmModel) }
    }

    var isLLMConfigured: Bool {
        !llmBaseURL.isEmpty && !llmAPIKey.isEmpty && !llmModel.isEmpty
    }
}