using System.Collections.ObjectModel;

namespace NeonSprawl.Server.Game.Factions;

/// <summary>In-memory faction catalog loaded at startup (NEO-134). Game code should prefer <see cref="IFactionDefinitionRegistry"/> for lookups.</summary>
public sealed class FactionDefinitionCatalog(
    string factionsDirectory,
    IReadOnlyDictionary<string, FactionDefRow> byId,
    int catalogJsonFileCount)
{
    /// <summary>Absolute path to the directory that was enumerated for <c>*_factions.json</c> catalogs.</summary>
    public string FactionsDirectory { get; } = factionsDirectory;

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

    public int DistinctFactionCount => ById.Count;

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