using Omika.Diagnostics.Queries;

namespace Omika.Diagnostics.Tests;

/// <summary>
/// Tâche 4 — Périodes du Dashboard (§T4/5) et détection des niveaux d'erreur réels
/// (§T4/6). Logique pure (Core), testable sans intégration Web : c'est exactement la
/// logique déléguée par <c>IndexModel</c> (<c>DashboardPeriods.Resolve</c>).
/// </summary>
public class DashboardPeriodTests
{
    [Fact]
    public void Resolve_Null_ReturnsDefault()
    {
        DashboardPeriod period = DashboardPeriods.Resolve(null);
        Assert.Equal(DashboardPeriods.DefaultKey, period.Key);
        Assert.Equal(TimeSpan.FromHours(24), period.Duration);
    }

    [Fact]
    public void Resolve_24h()
    {
        DashboardPeriod period = DashboardPeriods.Resolve("24h");
        Assert.Equal("24h", period.Key);
        Assert.Equal(TimeSpan.FromHours(24), period.Duration);
        Assert.Equal(DiagnosticTimeBucket.Hour, period.Bucket);
    }

    [Fact]
    public void Resolve_7d()
    {
        DashboardPeriod period = DashboardPeriods.Resolve("7d");
        Assert.Equal("7d", period.Key);
        Assert.Equal(TimeSpan.FromDays(7), period.Duration);
        Assert.Equal(DiagnosticTimeBucket.Day, period.Bucket);
    }

    [Fact]
    public void Resolve_30d()
    {
        DashboardPeriod period = DashboardPeriods.Resolve("30d");
        Assert.Equal("30d", period.Key);
        Assert.Equal(TimeSpan.FromDays(30), period.Duration);
        Assert.Equal(DiagnosticTimeBucket.Day, period.Bucket);
    }

    [Fact]
    public void Resolve_Invalid_FallsBackToDefault()
    {
        DashboardPeriod period = DashboardPeriods.Resolve("999d");
        Assert.Equal(DashboardPeriods.DefaultKey, period.Key);
    }

    [Fact]
    public void Resolve_IsCaseInsensitive()
    {
        Assert.Equal("24h", DashboardPeriods.Resolve("24H").Key);
        Assert.Equal("7d", DashboardPeriods.Resolve("7D").Key);
    }

    [Fact]
    public void All_ExposesExactlyThreePeriods()
    {
        Assert.Equal(3, DashboardPeriods.All.Count);
        Assert.Equal(new[] { "24h", "7d", "30d" }, DashboardPeriods.All.Select(p => p.Key).ToArray());
    }

    [Fact]
    public void IsError_MatchesErrorAndCritical_CaseInsensitively()
    {
        Assert.True(DiagnosticErrorLevels.IsError("Error"));
        Assert.True(DiagnosticErrorLevels.IsError("error"));
        Assert.True(DiagnosticErrorLevels.IsError("Critical"));
        Assert.True(DiagnosticErrorLevels.IsError("CRITICAL"));
        Assert.False(DiagnosticErrorLevels.IsError("Info"));
        Assert.False(DiagnosticErrorLevels.IsError("Warning"));
        Assert.False(DiagnosticErrorLevels.IsError(null));
        Assert.False(DiagnosticErrorLevels.IsError("  "));
    }
}