//
// Copyright Amazon.com Inc. or its affiliates.
// All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//

import Foundation

protocol AmplifyArchiverBehaviour {
    func encode<T>(_ encodable: T) throws -> Data where T: Encodable
    func decode<T>(_ decodable: T.Type, from data: Data) throws -> T? where T: Decodable
}

struct AmplifyArchiver: AmplifyArchiverBehaviour {
    func encode<T>(_ encodable: T) throws -> Data where T: Encodable {
        let archiver = NSKeyedArchiver(requiringSecureCoding: false)
        try archiver.encodeEncodable(encodable, forKey: NSKeyedArchiveRootObjectKey)
        archiver.finishEncoding()
        return archiver.encodedData
    }

    func decode<T>(_ decodable: T.Type, from data: Data) throws -> T? where T: Decodable {
        let unarchiver = try NSKeyedUnarchiver(forReadingFrom: data)
        return try unarchiver.decodeTopLevelDecodable(decodable, forKey: NSKeyedArchiveRootObjectKey)
    }
}