using System.Diagnostics.CodeAnalysis;

namespace NeonSprawl.Server.Game.Encounters;

/// <summary>Adapter over <see cref="RewardTableDefinitionCatalog"/> (NEO-102).</summary>
public sealed class RewardTableDefinitionRegistry(RewardTableDefinitionCatalog catalog) : IRewardTableDefinitionRegistry
{
    private readonly IReadOnlyList<RewardTableDefRow> _definitionsInIdOrder = BuildDefinitionsInIdOrder(catalog);

    /// <inheritdoc />
    public bool TryGetDefinition(string? rewardTableId, [NotNullWhen(true)] out RewardTableDefRow? definition)
    {
        if (rewardTableId is null)
        {
            definition = null;
            return false;
        }

        return catalog.TryGetRewardTable(rewardTableId, out definition);
    }

    /// <inheritdoc />
    public bool TryNormalizeKnown(string? rawRewardTableId, [NotNullWhen(true)] out string normalized)
    {
        if (rawRewardTableId is null)
        {
            normalized = string.Empty;
            return false;
        }

        normalized = rawRewardTableId.Trim().ToLowerInvariant();
        if (normalized.Length == 0)
        {
            normalized = string.Empty;
            return false;
        }

        return catalog.TryGetRewardTable(normalized, out _);
    }

    /// <inheritdoc />
    public IReadOnlyList<RewardTableDefRow> GetDefinitionsInIdOrder() => _definitionsInIdOrder;

    private static IReadOnlyList<RewardTableDefRow> BuildDefinitionsInIdOrder(RewardTableDefinitionCatalog catalog)
    {
        var ids = catalog.ById.Keys.OrderBy(k => k, StringComparer.Ordinal).ToArray();
        var list = new List<RewardTableDefRow>(ids.Length);
        foreach (var id in ids)
        {
            list.Add(catalog.ById[id]);
        }

        return list;
    }
}