#region Copyright notice and license
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// modification, are permitted provided that the following conditions are
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//
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// in the documentation and/or other materials provided with the
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#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Grpc.Core;
using Grpc.Health.V1Alpha;
using NUnit.Framework;

namespace Grpc.HealthCheck.Tests
{
    /// <summary>
    /// Health client talks to health server.
    /// </summary>
    public class HealthClientServerTest
    {
        const string Host = "localhost";
        Server server;
        Channel channel;
        Grpc.Health.V1Alpha.Health.IHealthClient client;
        Grpc.HealthCheck.HealthServiceImpl serviceImpl;

        [TestFixtureSetUp]
        public void Init()
        {
            serviceImpl = new HealthServiceImpl();

            server = new Server
            {
                Services = { Grpc.Health.V1Alpha.Health.BindService(serviceImpl) },
                Ports = { { Host, ServerPort.PickUnused, ServerCredentials.Insecure } }
            };
            server.Start();
            channel = new Channel(Host, server.Ports.Single().BoundPort, Credentials.Insecure);

            client = Grpc.Health.V1Alpha.Health.NewClient(channel);
        }

        [TestFixtureTearDown]
        public void Cleanup()
        {
            channel.Dispose();

            server.ShutdownAsync().Wait();
            GrpcEnvironment.Shutdown();
        }

        [Test]
        public void ServiceIsRunning()
        {
            serviceImpl.SetStatus("", "", HealthCheckResponse.Types.ServingStatus.SERVING);

            var response = client.Check(HealthCheckRequest.CreateBuilder().SetHost("").SetService("").Build());
            Assert.AreEqual(HealthCheckResponse.Types.ServingStatus.SERVING, response.Status);
        }

        [Test]
        public void ServiceDoesntExist()
        {
            Assert.Throws(Is.TypeOf(typeof(RpcException)).And.Property("Status").Property("StatusCode").EqualTo(StatusCode.NotFound), () => client.Check(HealthCheckRequest.CreateBuilder().SetHost("").SetService("nonexistent.service").Build()));
        }

        // TODO(jtattermusch): add test with timeout once timeouts are supported
    }
}