using Xunit;
using ytLive.Models;
using ytLive.Services;

namespace ytLive.Tests;

/// <summary>
/// Report-by-exception (TASK 5 item 3): the banner decision is pure so the
/// severity/threshold rules are pinned without any HTTP or UI.
/// </summary>
public class StreamHealthReporterTests
{
    [Fact]
    public void Banner_Is_Null_For_Empty_Or_Info_Only_Issues()
    {
        Assert.Null(StreamHealthReporter.BannerFor([]).Text);

        var report = StreamHealthReporter.BannerFor(new[]
        {
            new StreamConfigurationIssue { Severity = StreamIssueSeverity.Info, Type = "lowLatency" },
        });
        Assert.Null(report.Text);
    }

    [Fact]
    public void Warning_Yields_Text_Without_Error_Color()
    {
        var report = StreamHealthReporter.BannerFor(new[]
        {
            new StreamConfigurationIssue { Severity = StreamIssueSeverity.Warning, Type = "reconnect" },
        });
        Assert.Equal("reconnect", report.Text);
        Assert.False(report.IsError);
    }

    [Fact]
    public void Error_Issue_Yields_Text_And_Error_Color_Even_With_Warnings()
    {
        var report = StreamHealthReporter.BannerFor(new[]
        {
            new StreamConfigurationIssue { Severity = StreamIssueSeverity.Warning, Type = "reconnect" },
            new StreamConfigurationIssue { Severity = StreamIssueSeverity.Error, Type = "bitrateHigh" },
        });
        Assert.Equal("reconnect, bitrateHigh", report.Text);
        Assert.True(report.IsError);
    }

    [Fact]
    public void Blank_Issue_Types_Are_Dropped_From_The_Banner()
    {
        var report = StreamHealthReporter.BannerFor(new[]
        {
            new StreamConfigurationIssue { Severity = StreamIssueSeverity.Error, Type = null },
            new StreamConfigurationIssue { Severity = StreamIssueSeverity.Error, Type = "  " },
            new StreamConfigurationIssue { Severity = StreamIssueSeverity.Error, Type = "bitrateLow" },
        });
        Assert.Equal("bitrateLow", report.Text);
        Assert.True(report.IsError);
    }
}