//===----------------------------------------------------------------------===//
// Copyright © 2026 Apple Inc. and the container project authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//===----------------------------------------------------------------------===//

/// Protocol for errors with a stable code and structured metadata.
/// This allows the client to present the error as it chooses.

import OrderedCollections

public protocol AppError: Error {
    var code: AppErrorCode { get }
    var metadata: OrderedDictionary<String, String> { get }
    var underlyingError: Error? { get }
}

public struct AppErrorCode: RawRepresentable, Hashable, Sendable {
    public let rawValue: String

    public init(rawValue: String) {
        self.rawValue = rawValue
    }

    public static let invalidArgument = AppErrorCode(rawValue: "invalid_argument")
}