using MoShiro.Backend.Application;
using MoShiro.Protocol;

namespace MoShiro.Backend.Tests;

public sealed class LinkRuntimeTests
{
    private static LinkHealth Health(ControlState state) => new() { ListenerId = "agt_l", Control = { State = state } };

    [Fact]
    public void DownSince_StaysAtTheFirstLostReport_AndClearsWhenTheControlLinkIsUp()
    {
        var runtime = new LinkRuntime();
        runtime.Replace("agt_d", 1_000, [Health(ControlState.Up)]);
        Assert.Null(runtime.Get("agt_d", "agt_l", IpVersions.V4)!.DownSinceMs);

        runtime.Replace("agt_d", 2_000, [Health(ControlState.Backoff)]);
        runtime.Replace("agt_d", 3_000, [Health(ControlState.Dialing)]); // 重试期间状态在退避和拨号之间来回，失联的起点不变
        runtime.Replace("agt_d", 4_000, [Health(ControlState.Backoff)]);
        Assert.Equal(2_000, runtime.Get("agt_d", "agt_l", IpVersions.V4)!.DownSinceMs);

        runtime.MarkDialerOffline("agt_d", 5_000);
        Assert.Equal(2_000, runtime.Get("agt_d", "agt_l", IpVersions.V4)!.DownSinceMs);

        runtime.Replace("agt_d", 6_000, [Health(ControlState.Up)]);
        Assert.Null(runtime.Get("agt_d", "agt_l", IpVersions.V4)!.DownSinceMs);
    }
}