import Foundation

/// Protocol defining the interface for Keychain operations.
///
/// Conformers enable dependency injection and mocking in tests.
public protocol KeychainStoring: Sendable {
    /// Stores data for a keychain entry.
    func set(
        _ data: Data,
        service: String,
        key: String,
        accessibility: KeychainAccessibility,
        accessControl: KeychainAccessControl?
    ) async throws
    
    /// Retrieves data for a keychain entry.
    func get(service: String, key: String) async throws -> Data?
    
    /// Deletes a keychain entry.
    func delete(service: String, key: String) async throws
    
    /// Checks if a keychain entry exists.
    func exists(service: String, key: String) async throws -> Bool
    
    /// Deletes all keychain entries for a service.
    func deleteAll(service: String) async throws
}