/*
 * Copyright 2024, gRPC Authors All rights reserved.
 *
 * 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
 *
 *     http://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.
 */

/// A description of a service.
public struct ServiceDescriptor: Sendable, Hashable {
  /// The name of the package the service belongs to. For example, "helloworld".
  /// An empty string means that the service does not belong to any package.
  public var package: String

  /// The name of the service. For example, "Greeter".
  public var service: String

  /// The fully qualified service name in the format:
  /// - "package.service": if a package name is specified. For example, "helloworld.Greeter".
  /// - "service": if a package name is not specified. For example, "Greeter".
  public var fullyQualifiedService: String {
    if self.package.isEmpty {
      return self.service
    }

    return "\(self.package).\(self.service)"
  }

  /// - Parameters:
  ///   - package: The name of the package the service belongs to. For example, "helloworld".
  ///   An empty string means that the service does not belong to any package.
  ///   - service: The name of the service. For example, "Greeter".
  public init(package: String, service: String) {
    self.package = package
    self.service = service
  }
}