#region Copyright notice and license

// Copyright 2015, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core;
using Grpc.Core.Utils;
using Grpc.Testing;
using NUnit.Framework;

namespace Grpc.IntegrationTesting
{
    public class HeaderInterceptorTest
    {
        const string Host = "localhost";
        Server server;
        Channel channel;
        TestService.TestServiceClient client;

        [TestFixtureSetUp]
        public void Init()
        {
            server = new Server
            {
                Services = { TestService.BindService(new TestServiceImpl()) },
                Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
            };
            server.Start();

            channel = new Channel(Host, server.Ports.Single().BoundPort, ChannelCredentials.Insecure);
            client = TestService.NewClient(channel);
        }

        [TestFixtureTearDown]
        public void Cleanup()
        {
            channel.ShutdownAsync().Wait();
            server.ShutdownAsync().Wait();
        }

        [Test]
        public async Task HeaderInterceptor_CreateMetadata()
        {
            var key = "x-grpc-test-echo-initial";
            client.HeaderInterceptor = new HeaderInterceptor((method, metadata) =>
            {
                metadata.Add(key, "ABC");
            });

            var call = client.UnaryCallAsync(new SimpleRequest());
            await call;

           var responseHeaders = await call.ResponseHeadersAsync;
           Assert.AreEqual("ABC", responseHeaders.First((entry) => entry.Key == key).Value);
        }

        [Test]
        public async Task HeaderInterceptor_AppendMetadata()
        {
            var initialKey = "x-grpc-test-echo-initial";
            var trailingKey = "x-grpc-test-echo-trailing-bin";

            client.HeaderInterceptor = new HeaderInterceptor((method, metadata) =>
            {
                metadata.Add(initialKey, "ABC");
            });

            var headers = new Metadata
            {
                { trailingKey, new byte[] {0xaa} }
            };
            var call = client.UnaryCallAsync(new SimpleRequest(), headers: headers);
            await call;

            var responseHeaders = await call.ResponseHeadersAsync;
            Assert.AreEqual("ABC", responseHeaders.First((entry) => entry.Key == initialKey).Value);
            CollectionAssert.AreEqual(new byte[] {0xaa}, call.GetTrailers().First((entry) => entry.Key == trailingKey).ValueBytes);
        }
    }
}