using System.Collections.ObjectModel;

namespace NeonSprawl.Server.Game.Mastery;

/// <summary>In-memory mastery catalog loaded at startup (NEO-46). Prefer <see cref="IMasteryCatalogRegistry"/> for lookups.</summary>
public sealed class MasteryCatalog(
    string masteryDirectory,
    IReadOnlyDictionary<string, MasteryTrackRow> tracksBySkillId,
    IReadOnlyDictionary<string, PerkDefRow> perksById,
    int catalogJsonFileCount)
{
    /// <summary>Absolute path to the directory enumerated for <c>*_mastery.json</c> catalogs.</summary>
    public string MasteryDirectory { get; } = masteryDirectory;

    public IReadOnlyDictionary<string, MasteryTrackRow> TracksBySkillId { get; } =
        new ReadOnlyDictionary<string, MasteryTrackRow>(
            new Dictionary<string, MasteryTrackRow>(tracksBySkillId, StringComparer.Ordinal));

    public IReadOnlyDictionary<string, PerkDefRow> PerksById { get; } =
        new ReadOnlyDictionary<string, PerkDefRow>(
            new Dictionary<string, PerkDefRow>(perksById, StringComparer.Ordinal));

    public int TrackCount => TracksBySkillId.Count;

    public int PerkCount => PerksById.Count;

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