using Ludarium.Domain;

namespace Ludarium.Application;

public sealed record HealthRuleResult(string Category, Severity Severity, string Message);

public static class HealthRules
{
    public static HealthRuleResult? EvaluateRoot(LibraryRoot root) =>
        !root.IsAvailable ? new("Availability", Severity.Critical, "The library root could not be read; existing artifacts were preserved.") :
        root.IsReadOnly != true ? new("Availability", Severity.Warning, "The library root is readable but a read-only mount could not be confirmed.") : null;

    public static HealthRuleResult? EvaluateArtifact(Artifact artifact) => artifact.MediaType switch
    {
        MediaType.Unknown => new("Identity", Severity.Notice, "Content type is unknown and remains available for review."),
        _ when artifact.State == ArtifactState.Missing => new("Availability", Severity.Warning, "The artifact was not observed during a successful root traversal."),
        _ => null
    };

    public static HealthRuleResult? EvaluateBundle(Bundle bundle) => bundle.State switch
    {
        BundleState.Incomplete => new("BundleCompleteness", Severity.Warning, "One or more required bundle members are missing."),
        BundleState.Ambiguous => new("BundleCompleteness", Severity.Notice, "Bundle membership requires an operator decision."),
        _ => null
    };
}