using PnvPanel.Domain.Exceptions;
using PnvPanel.Domain.Nodes;
using Xunit;

namespace PnvPanel.Domain.Tests.Nodes;

public class NodeTests
{
    private static NodeCredentials Credentials => new("admin", "protected-secret");

    [Fact]
    public void Register_WithAbsoluteUri_CreatesEnabledUnknownStatusNode()
    {
        var node = Node.Register(
            "Germany-1",
            new Uri("https://de1.example.com:2053"),
            Credentials,
            "Germany"
        );

        Assert.Equal("Germany-1", node.Name);
        Assert.Equal("Germany", node.Location);
        Assert.Equal(NodeStatus.Unknown, node.Status);
        Assert.True(node.IsEnabled);
        Assert.NotEqual(Guid.Empty, node.Id);
    }

    [Fact]
    public void Register_WithRelativeUri_Throws()
    {
        var relativeUri = new Uri("de1.example.com", UriKind.Relative);

        Assert.Throws<DomainException>(() =>
            Node.Register("Germany-1", relativeUri, Credentials, null)
        );
    }

    [Theory]
    [InlineData("https://host.example.com/benis", "https://host.example.com/benis/")]
    [InlineData("https://host.example.com/benis/", "https://host.example.com/benis/")]
    [InlineData("https://host.example.com", "https://host.example.com/")]
    public void Register_NormalizesBaseAddressToTrailingSlash(string input, string expected)
    {
        var node = Node.Register("Node", new Uri(input), Credentials, null);

        Assert.Equal(expected, node.BaseAddress.ToString());
    }

    [Theory]
    [InlineData("https://host.example.com/benis", "https://host.example.com/benis/")]
    [InlineData("https://host.example.com/benis/", "https://host.example.com/benis/")]
    public void UpdateAddress_NormalizesBaseAddressToTrailingSlash(string input, string expected)
    {
        var node = Node.Register("Node", new Uri("https://old.example.com"), Credentials, null);

        node.UpdateAddress(new Uri(input));

        Assert.Equal(expected, node.BaseAddress.ToString());
    }

    [Fact]
    public void UpdateDetails_ChangesNameAndLocation()
    {
        var node = Node.Register(
            "Old",
            new Uri("https://example.com"),
            Credentials,
            "Old location"
        );

        node.UpdateDetails("New", "New location");

        Assert.Equal("New", node.Name);
        Assert.Equal("New location", node.Location);
    }

    [Fact]
    public void UpdateCredentials_ReplacesCredentials()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        var newCredentials = new NodeCredentials("root", "new-protected-secret");

        node.UpdateCredentials(newCredentials);

        Assert.Equal(newCredentials, node.Credentials);
    }

    [Fact]
    public void Disable_ThenEnable_TogglesIsEnabled()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);

        node.Disable();
        Assert.False(node.IsEnabled);

        node.Enable();
        Assert.True(node.IsEnabled);
    }

    [Fact]
    public void SetNotifyOnStatusChange_DefaultsFalse_AndCanBeToggled()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        Assert.False(node.NotifyOnStatusChange);

        node.SetNotifyOnStatusChange(true);
        Assert.True(node.NotifyOnStatusChange);

        node.SetNotifyOnStatusChange(false);
        Assert.False(node.NotifyOnStatusChange);
    }

    [Fact]
    public void UpdateStatus_SetsStatus()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);

        node.UpdateStatus(NodeStatus.Online);

        Assert.Equal(NodeStatus.Online, node.Status);
    }

    [Fact]
    public void RecordProbe_SingleFailure_DoesNotGoOffline_WhenThresholdNotReached()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        node.UpdateStatus(NodeStatus.Online);

        var changed = node.RecordProbe(reachable: false, failureThreshold: 2);

        Assert.False(changed);
        Assert.Equal(NodeStatus.Online, node.Status);
        Assert.Equal(1, node.ConsecutiveProbeFailures);
    }

    [Fact]
    public void RecordProbe_GoesOffline_OnlyAfterConsecutiveFailuresReachThreshold()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        node.UpdateStatus(NodeStatus.Online);

        Assert.False(node.RecordProbe(reachable: false, failureThreshold: 2));
        Assert.Equal(NodeStatus.Online, node.Status);

        var changed = node.RecordProbe(reachable: false, failureThreshold: 2);

        Assert.True(changed);
        Assert.Equal(NodeStatus.Offline, node.Status);
        Assert.Equal(2, node.ConsecutiveProbeFailures);
    }

    [Fact]
    public void RecordProbe_FlappingFailSuccess_NeverGoesOffline()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        node.UpdateStatus(NodeStatus.Online);

        // Чередование fail/success (ровно паттерн со скриншота) не должно ронять статус:
        // порогу нужны ДВЕ подряд неудачи, а удачная проба обнуляет счётчик.
        for (var i = 0; i < 5; i++)
        {
            Assert.False(node.RecordProbe(reachable: false, failureThreshold: 2));
            Assert.False(node.RecordProbe(reachable: true, failureThreshold: 2));
            Assert.Equal(NodeStatus.Online, node.Status);
            Assert.Equal(0, node.ConsecutiveProbeFailures);
        }
    }

    [Fact]
    public void RecordProbe_SuccessAfterOffline_ReturnsOnlineImmediately_AndResetsCounter()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        node.RecordProbe(reachable: false, failureThreshold: 2);
        node.RecordProbe(reachable: false, failureThreshold: 2);
        Assert.Equal(NodeStatus.Offline, node.Status);

        var changed = node.RecordProbe(reachable: true, failureThreshold: 2);

        Assert.True(changed);
        Assert.Equal(NodeStatus.Online, node.Status);
        Assert.Equal(0, node.ConsecutiveProbeFailures);
    }

    [Fact]
    public void RecordProbe_SuccessWhenAlreadyOnline_ReportsNoChange()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        node.UpdateStatus(NodeStatus.Online);

        var changed = node.RecordProbe(reachable: true, failureThreshold: 2);

        Assert.False(changed);
        Assert.Equal(NodeStatus.Online, node.Status);
    }

    [Fact]
    public void MarkSynced_SetsLastSyncAt()
    {
        var node = Node.Register("Node", new Uri("https://example.com"), Credentials, null);
        Assert.Null(node.LastSyncAt);

        node.MarkSynced();

        Assert.NotNull(node.LastSyncAt);
    }

    [Fact]
    public void NodeCredentials_ToString_RedactsPassword()
    {
        var text = Credentials.ToString();

        Assert.DoesNotContain("protected-secret", text);
        Assert.Contains("REDACTED", text);
    }
}