using Bunit;
using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Deployment;
using ZB.MOM.WW.ScadaBridge.Commons.Types.Debugging;

namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests.Deployment;

/// <summary>
/// ScadaBridge#56: the Flow Debugger's node-log section lists the lines other actors wrote for each
/// traced execution — grouped per execution under that execution's run step, with level filtering and
/// the logger category — and renders nothing when the graph has no node lines.
/// </summary>
public class FlowNodeLogPanelTests : BunitContext
{
    private static readonly DateTimeOffset T0 = new(2026, 11, 10, 12, 0, 0, TimeSpan.Zero);

    private static FlowStep Run(Guid execution, string title)
        => new(Guid.NewGuid(), execution, null, FlowStepKind.ScriptRun, FlowLane.Site, title, null, T0, 10,
            FlowStepOutcome.Ok, null, null, null, "site-a", "node-a", "M1", title, null);

    private static FlowLogLine Node(Guid execution, string level, string message, int ms,
        string category = "ZB.MOM.WW.ScadaBridge.DataConnectionLayer.Actors.DataConnectionActor",
        string? exceptionMessage = null)
        => new(Guid.NewGuid(), execution, T0.AddMilliseconds(ms), level, FlowLogLine.NodeSource, message,
            exceptionMessage, exceptionMessage is null ? null : "System.Exception: " + exceptionMessage, null, ms, category);

    private static FlowGraph Graph(IReadOnlyList<FlowStep> steps, IReadOnlyList<FlowLogLine>? nodeLogs)
        => new(steps, [], Predicted: false, Truncated: false, NodeLogs: nodeLogs);

    /// <summary>No node lines (or no graph): the section is not rendered at all.</summary>
    [Fact]
    public void NoNodeLines_RendersNothing()
    {
        var execution = Guid.NewGuid();
        Assert.Empty(Render<FlowNodeLogPanel>(p => p.Add(x => x.Graph, Graph([Run(execution, "Runner")], null)))
            .FindAll("[data-test=flow-nodelog-panel]"));
        Assert.Empty(Render<FlowNodeLogPanel>().FindAll("[data-test=flow-nodelog-panel]"));
    }

    /// <summary>Lines are grouped per execution, titled by its run step, with short category, level and counts.</summary>
    [Fact]
    public void Lines_AreGroupedPerExecution_UnderTheRunStep()
    {
        var a = Guid.NewGuid();
        var b = Guid.NewGuid();
        var graph = Graph([Run(a, "OnRecipe"), Run(b, "SharedHelper")],
        [
            Node(a, "debug", "Writing to tag T1", 1),
            Node(b, "warn", "tag T2 bad quality", 2, category: "ZB.MOM.WW.ScadaBridge.SiteRuntime.Actors.InstanceActor"),
            Node(a, "error", "write failed", 3, exceptionMessage: "timeout"),
        ]);

        var cut = Render<FlowNodeLogPanel>(p => p.Add(x => x.Graph, graph));

        Assert.Equal("3 lines · 1 error · 1 warning · 1 info/debug", cut.Find("[data-test=flow-nodelog-count]").TextContent);
        var groups = cut.FindAll("[data-test=flow-nodelog-execution]");
        Assert.Equal(2, groups.Count);
        Assert.Contains("OnRecipe", groups[0].TextContent);
        Assert.Contains(a.ToString(), groups[0].TextContent);
        var aRows = groups[0].QuerySelectorAll("tbody tr");
        Assert.Equal(2, aRows.Length);
        Assert.Contains("DataConnectionActor", aRows[0].TextContent);
        Assert.DoesNotContain("ZB.MOM.WW", aRows[0].TextContent);
        Assert.Contains("timeout", aRows[1].TextContent);
        Assert.Contains("InstanceActor", groups[1].TextContent);
        Assert.Contains("tag T2 bad quality", groups[1].TextContent);
    }

    /// <summary>Warn + hides debug/info lines; an execution left with none says so; All restores them.</summary>
    [Fact]
    public void WarnPlusFilter_HidesLowLevels()
    {
        var a = Guid.NewGuid();
        var b = Guid.NewGuid();
        var graph = Graph([Run(a, "OnRecipe"), Run(b, "Other")],
            [Node(a, "info", "connected", 1), Node(a, "warn", "slow write", 2), Node(b, "debug", "chatter", 3)]);
        var cut = Render<FlowNodeLogPanel>(p => p.Add(x => x.Graph, graph));

        cut.Find("[data-test=flow-nodelog-filter-warn]").Click();

        var groups = cut.FindAll("[data-test=flow-nodelog-execution]");
        Assert.Equal("warn", Assert.Single(groups[0].QuerySelectorAll("tbody tr")).GetAttribute("data-level"));
        Assert.NotNull(groups[1].QuerySelector("[data-test=flow-nodelog-none-shown]"));

        cut.Find("[data-test=flow-nodelog-filter-all]").Click();
        Assert.Equal(3, cut.FindAll("[data-test=flow-nodelog-lines] tbody tr").Count);
    }

    /// <summary>Clicking the execution's title selects its run step.</summary>
    [Fact]
    public void ExecutionTitle_SelectsItsRunStep()
    {
        var a = Guid.NewGuid();
        var run = Run(a, "OnRecipe");
        FlowStep? selected = null;
        var cut = Render<FlowNodeLogPanel>(p => p
            .Add(x => x.Graph, Graph([run], [Node(a, "warn", "slow", 1)]))
            .Add(x => x.OnSelectStep, s => selected = s));

        cut.Find("[data-test=flow-nodelog-step]").Click();

        Assert.Same(run, selected);
    }
}