using System.Text.Json;
using Yuanshen.Protocol;

namespace Yuanshen.Gameserver.Game;

internal sealed class ScenePointTable
{
    private readonly Dictionary<uint, Dictionary<uint, Vector>> _points = new();

    public ScenePointTable()
    {
        Load(3, "scene3_points.json");
    }

    public bool TryGet(uint sceneId, uint pointId, out Vector position)
    {
        position = new Vector();
        return _points.TryGetValue(sceneId, out Dictionary<uint, Vector>? points)
            && points.TryGetValue(pointId, out position!);
    }

    private void Load(uint sceneId, string fileName)
    {
        string path = Path.Combine(AppContext.BaseDirectory, "assets", "scene", fileName);
        if (!File.Exists(path))
            return;

        using JsonDocument document = JsonDocument.Parse(File.ReadAllText(path));
        Dictionary<uint, Vector> points = new();

        foreach (JsonProperty property in document.RootElement.EnumerateObject())
        {
            if (!uint.TryParse(property.Name, out uint pointId))
                continue;

            JsonElement value = property.Value;
            points[pointId] = new Vector
            {
                X = value.GetProperty("x").GetSingle(),
                Y = value.GetProperty("y").GetSingle(),
                Z = value.GetProperty("z").GetSingle()
            };
        }

        _points[sceneId] = points;
    }
}