import Foundation

enum AIConfiguration {
    private static let apiKeyDefaultsKey = "openai_api_key"

    static var apiKey: String? {
        if let envKey = ProcessInfo.processInfo.environment["OPENAI_API_KEY"],
           !envKey.trimmingCharacters(in: .whitespaces).isEmpty {
            return envKey.trimmingCharacters(in: .whitespaces)
        }

        let stored = UserDefaults.standard.string(forKey: apiKeyDefaultsKey)?
            .trimmingCharacters(in: .whitespaces)
        guard let stored, !stored.isEmpty else { return nil }
        return stored
    }

    static var usesLiveAI: Bool {
        apiKey != nil
    }

    static func setAPIKey(_ key: String?) {
        let trimmed = key?.trimmingCharacters(in: .whitespaces)
        if let trimmed, !trimmed.isEmpty {
            UserDefaults.standard.set(trimmed, forKey: apiKeyDefaultsKey)
        } else {
            UserDefaults.standard.removeObject(forKey: apiKeyDefaultsKey)
        }
    }
}