using System.Text.Json;
using System.Text.Json.Nodes;

namespace RadicadeServer.Extensions
{
	public static class JsonExtension
	{
		public static T? FromJson<T>(this string json)
		{
			return JsonSerializer.Deserialize<T>(json);
		}
		public static T? FromJson<T>(this string json, JsonSerializerOptions options)
		{
			return JsonSerializer.Deserialize<T>(json, options);
		}
		public static string ToJson(this object val)
		{
			return JsonSerializer.Serialize(val);
		}

		public static T Get<T>(this JsonNode node, string key, T fallback = default!)
		{
			try
			{
				var value = node?[key];

				if (value is null)
					return fallback;

				if (value is JsonArray or JsonObject)
					return value.Deserialize<T>() ?? fallback;

				var kind = value.GetValueKind();

				if (typeof(T) == typeof(bool))
				{
					if (kind == JsonValueKind.String)
					{
						var text = value.GetValue<string>();
						return (T)(object)(text == "1" || text.Equals("true", StringComparison.OrdinalIgnoreCase));
					}

					if (kind == JsonValueKind.Number)
						return (T)(object)(value.GetValue<decimal>() != 0);
				}

				if (typeof(T).IsEnum)
				{
					if (kind == JsonValueKind.String)
						return (T)Enum.Parse(typeof(T), value.GetValue<string>(), ignoreCase: true);

					if (kind == JsonValueKind.Number)
						return (T)Enum.ToObject(typeof(T), Convert.ChangeType(value.GetValue<decimal>(), Enum.GetUnderlyingType(typeof(T))));
				}

				return value.GetValue<T>();
			}
			catch
			{
				return fallback;
			}
		}
	}
}