using System;
using System.IO;
using System.Text.Json;
using System.Threading.Tasks;

namespace undead_universal_patch_il2cpp.Core;

public class DediConfig<T>
{
    private readonly string _default;
    public readonly string _name;
    public readonly string path;
    private T? cached;
    private bool loaded = false;
    private readonly JsonSerializerOptions? _options;

    public DediConfig(string name, string def, JsonSerializerOptions? options)
    {
        if (string.IsNullOrWhiteSpace(name)) throw new ArgumentException("Name cannot be invalid");

        _name = name;
        path = $"BepInEx/config/Undead.{name}.json";
        _default = def;
        _options = options;
    }

    private string GetAlways() {
        if (!File.Exists(path))
        {
            File.WriteAllText(path, _default);
            return _default;
        }
        return File.ReadAllText(path);
    }
    public T Get()
    {
        if (loaded) return cached;

        string data = GetAlways();
        cached = JsonSerializer.Deserialize<T>(data, _options == null ? new JsonSerializerOptions()
        {
            PropertyNameCaseInsensitive = true,
            AllowTrailingCommas = true
        } : _options);

        loaded = true;
        return cached;
    }
}