using System.Collections.ObjectModel;

namespace NeonSprawl.Server.Game.Contracts;

/// <summary>In-memory contract template catalog loaded at startup (NEO-145). Game code should prefer <see cref="IContractTemplateRegistry"/> for lookups.</summary>
public sealed class ContractTemplateCatalog(
    string contractsDirectory,
    IReadOnlyDictionary<string, ContractTemplateRow> byId,
    int catalogJsonFileCount)
{
    /// <summary>Absolute path to the directory that was enumerated for <c>*_contract_templates.json</c> catalogs.</summary>
    public string ContractsDirectory { get; } = contractsDirectory;

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

    public int DistinctTemplateCount => ById.Count;

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