using System.Collections.ObjectModel;

namespace NeonSprawl.Server.Game.Skills;

/// <summary>In-memory skill catalog loaded at startup (NEO-34). Game code should prefer <see cref="ISkillDefinitionRegistry"/> for lookups (NEO-35).</summary>
public sealed class SkillDefinitionCatalog(
    string skillsDirectory,
    IReadOnlyDictionary<string, SkillDefRow> byId,
    int catalogJsonFileCount)
{
    /// <summary>Absolute path to the directory that was enumerated for <c>*_skills.json</c> catalogs.</summary>
    public string SkillsDirectory { get; } = skillsDirectory;

    public IReadOnlyDictionary<string, SkillDefRow> ById { get; } =
        new ReadOnlyDictionary<string, SkillDefRow>(new Dictionary<string, SkillDefRow>(byId, StringComparer.Ordinal));

    public int DistinctSkillCount => ById.Count;

    /// <summary>Number of <c>*_skills.json</c> files under <see cref="SkillsDirectory"/>.</summary>
    public int CatalogJsonFileCount { get; } = catalogJsonFileCount;
}