using System.Text.Json;

namespace Yuanshen.Gameserver.Game;

internal sealed class OpenStateTable
{
    private static readonly uint[] Fallback = { 1, 2, 3, 4, 5, 31, 32 };

    public IReadOnlyList<uint> Ids { get; }

    public OpenStateTable()
    {
        List<uint> ids = Load("OpenStateConfigData.json");
        Ids = ids.Count != 0 ? ids : Fallback;
    }

    private static List<uint> Load(string fileName)
    {
        List<uint> ids = new();
        string path = Path.Combine(AppContext.BaseDirectory, "assets", "excel", fileName);
        if (!File.Exists(path))
            return ids;

        using JsonDocument document = JsonDocument.Parse(File.ReadAllText(path));
        foreach (JsonElement entry in document.RootElement.EnumerateArray())
        {
            if (entry.TryGetProperty("id", out JsonElement id) && id.TryGetUInt32(out uint value) && value != 0)
                ids.Add(value);
        }

        return ids;
    }
}