using System.Text.Json;

namespace Yuanshen.Gameserver.Game;

internal readonly record struct SpawnGroup(uint GroupId, float X, float Z, float Extent)
{
    public bool IsCompact => Extent <= CompactExtent;

    private const float CompactExtent = 60f;
}

internal sealed class SpawnGroupTable
{
    private readonly Dictionary<uint, SpawnGroup> _groups = new();

    public SpawnGroupTable()
    {
        Load("scene3_groups.json");
    }

    public bool TryGet(uint groupId, out SpawnGroup group) => _groups.TryGetValue(groupId, out group);

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

        using JsonDocument document = JsonDocument.Parse(File.ReadAllText(path));

        foreach (JsonElement row in document.RootElement.EnumerateArray())
        {
            uint groupId = row.GetProperty("g").GetUInt32();

            _groups[groupId] = new SpawnGroup(
                groupId,
                (float)row.GetProperty("x").GetDouble(),
                (float)row.GetProperty("z").GetDouble(),
                (float)row.GetProperty("e").GetDouble());
        }
    }
}