import Foundation

// Encrypted contacts cache backed by UserDefaults (same pattern as AccountCache).
struct ContactsCache {
    static let shared = ContactsCache()
    private let udKey = "thijooree_contacts_v1"
    private init() {}

    func save(_ contacts: [BankContact]) {
        guard let json = try? JSONEncoder().encode(contacts),
              let encrypted = try? CacheEncryption.shared.encryptData(json) else { return }
        UserDefaults.standard.set(encrypted, forKey: udKey)
    }

    func load() -> [BankContact] {
        guard let encrypted = UserDefaults.standard.string(forKey: udKey),
              let json = try? CacheEncryption.shared.decryptData(encrypted),
              let contacts = try? JSONDecoder().decode([BankContact].self, from: json) else { return [] }
        return contacts
    }

    func clear() {
        UserDefaults.standard.removeObject(forKey: udKey)
    }
}