// KeychainHelper.swift
// Helper for secure storage

import Foundation
import Security

class KeychainHelper {
    static let shared = KeychainHelper()
    
    private init() {}
    
    func save(_ value: String, forKey key: String) -> Bool {
        guard let data = value.data(using: .utf8) else { return false }
        
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: key,
            kSecValueData as String: data,
            kSecAttrService as String: "owen.notetaker" // Replace with your bundle ID
        ]
        
        SecItemDelete(query as CFDictionary) // Delete if exists
        let status = SecItemAdd(query as CFDictionary, nil)
        return status == errSecSuccess
    }
    
    func get(forKey key: String) -> String? {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: key,
            kSecAttrService as String: "owen.notetaker",
            kSecMatchLimit as String: kSecMatchLimitOne,
            kSecReturnData as String: true
        ]
        
        var item: AnyObject?
        let status = SecItemCopyMatching(query as CFDictionary, &item)
        
        guard status == errSecSuccess, let data = item as? Data else { return nil }
        return String(data: data, encoding: .utf8)
    }
}