//===----------------------------------------------------------------------===//
// Copyright © 2025-2026 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.
//===----------------------------------------------------------------------===//

import DNS
import Testing

@testable import DNSServer

struct FooHandler: DNSHandler {
    public func answer(query: Message) async throws -> Message? {
        if query.questions[0].name == "foo" {
            guard let ip = IPv4("1.2.3.4") else {
                throw DNSResolverError.serverError("cannot create IP address in test")
            }
            return Message(
                id: query.id,
                type: .response,
                returnCode: .noError,
                questions: query.questions,
                answers: [HostRecord<IPv4>(name: query.questions[0].name, ttl: 0, ip: ip)]
            )
        }
        return nil
    }
}

struct BarHandler: DNSHandler {
    public func answer(query: Message) async throws -> Message? {
        let question = query.questions[0]
        if question.name == "foo" || question.name == "bar" {
            guard let ip = IPv4("5.6.7.8") else {
                throw DNSResolverError.serverError("cannot create IP address in test")
            }
            return Message(
                id: query.id,
                type: .response,
                returnCode: .noError,
                questions: query.questions,
                answers: [HostRecord<IPv4>(name: query.questions[0].name, ttl: 0, ip: ip)]
            )
        }
        return nil
    }
}