using Newtonsoft.Json.Linq;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Primitives;
using System.Data;

namespace Configuration.Core;
public class JsonConfigurationSection : IConfigurationSection
{
    private readonly JObject _data;
    private readonly string _path;

    public JsonConfigurationSection(JObject data, string path)
    {
        _data = data;
        _path = path;
    }

    public string this[string key]
    {
        get => _data.SelectToken($"{_path.Replace(":", ".")}.{key.Replace(":", ".")}")?.ToString();
        set => throw new NotImplementedException();
    }

    public string Key => _path.Split(':').Last();
    public string Path => _path;
    public string Value
    {
        get => _data.SelectToken(_path.Replace(":", "."))?.ToString();
        set => throw new NotImplementedException();
    }


    public IConfigurationSection GetSection(string key) =>
        new JsonConfigurationSection(_data, string.IsNullOrEmpty(_path) ? key : $"{_path}:{key}");

    public JToken GetToken() => _data.SelectToken(_path.Replace(":", "."));

    public IEnumerable<IConfigurationSection> GetChildren()
    {
        var token = _data.SelectToken(_path.Replace(":", "."));
        if (token is JObject obj)
        {
            return obj.Properties()
                .Select(p => new JsonConfigurationSection(_data,
                    string.IsNullOrEmpty(_path) ? p.Name : $"{_path}:{p.Name}"));
        }
        return Enumerable.Empty<IConfigurationSection>();
    }
    public T Get<T>() where T : class
    {
        var token = _data.SelectToken(_path.Replace(":", "."));
        return token?.ToObject<T>();
    }

    public IChangeToken GetReloadToken() => new ConfigurationReloadToken();
}