using System.Text;
using System.Threading.Tasks;
using Xunit;

namespace StackExchange.Redis.Tests;

public class ValkeyUnitTests(ITestOutputHelper log)
{
    [Theory]
    [InlineData(ServerType.Standalone)]
    [InlineData(ServerType.Cluster)]
    public async Task IdentifyValkeyCluster(ServerType type)
    {
        using InProcessValkeyLikeServer server = new(log) { ServerType = type };
        await using var client = await server.ConnectAsync();
        var serverApi = client.GetServer(server.DefaultEndPoint);
        Assert.Equal(type, serverApi.ServerType);
        Assert.Equal(ProductVariant.Valkey, serverApi.GetProductVariant(out var version));
        Assert.Equal("8.1",  version);
    }

    private sealed class InProcessValkeyLikeServer(ITestOutputHelper log) : InProcessTestServer(log)
    {
        // see https://github.com/StackExchange/StackExchange.Redis/pull/3050
        protected override string ServerModeKey => "server_mode";

        protected override void Info(StringBuilder sb, string section)
        {
            base.Info(sb, section);
            if (section is "Server")
            {
                sb.AppendLine("valkey_version:8.1")
                    .AppendLine("server_name:valkey");
            }
        }
    }
}

        private string ServerModeValue => ServerType switch
        {
            ServerType.Cluster => "cluster",
            ServerType.Sentinel => "sentinel",
            _ => "standalone",
        };

        protected virtual string ServerModeKey => "redis_mode";

...

            case "Server":
                    AddHeader().Append("redis_version:").AppendLine(VersionString)
                        .Append(ServerModeKey).Append(':').Append(ServerModeValue).AppendLine()
                        .Append("os:").Append(Environment.OSVersion).AppendLine()
                        .Append("arch_bits:x").Append(IntPtr.Size * 8).AppendLine();

...

        span[9] = TypedRedisValue.BulkString(ServerModeValue);