import Foundation
import Security

enum KeychainStore {
	private static let service = "dev.andros.meshmonitorchat"

	static func set(_ value: String?, for key: String) {
		let q: [String: Any] = [
			kSecClass as String: kSecClassGenericPassword,
			kSecAttrService as String: service,
			kSecAttrAccount as String: key
		]
		SecItemDelete(q as CFDictionary)
		guard let value, let data = value.data(using: .utf8) else { return }
		var attrs = q
		attrs[kSecValueData as String] = data
		attrs[kSecAttrAccessible as String] = kSecAttrAccessibleAfterFirstUnlock
		SecItemAdd(attrs as CFDictionary, nil)
	}

	static func get(_ key: String) -> String? {
		let q: [String: Any] = [
			kSecClass as String: kSecClassGenericPassword,
			kSecAttrService as String: service,
			kSecAttrAccount as String: key,
			kSecReturnData as String: true,
			kSecMatchLimit as String: kSecMatchLimitOne
		]
		var result: AnyObject?
		let status = SecItemCopyMatching(q as CFDictionary, &result)
		guard status == errSecSuccess,
			  let data = result as? Data,
			  let s = String(data: data, encoding: .utf8) else { return nil }
		return s
	}
}