/*     INFINITY CODE 2013-2019      */
/*   http://www.infinity-code.com   */

using System;
using System.Globalization;
using System.Reflection;
using System.Xml;
using UnityEngine;

namespace InfinityCode.RealWorldTerrain
{
    public static class RealWorldTerrainXMLExt
    {
        public static T GetAttribute<T>(XmlNode node, string name)
        {
            XmlAttribute attribute = node.Attributes[name];

            if (attribute == null) return default(T);

            string value = attribute.Value;
            if (string.IsNullOrEmpty(value)) return default(T);

            Type type = typeof(T);
            if (type == typeof(string)) return (T)Convert.ChangeType(value, type);

            T obj = default(T);
            PropertyInfo[] properties = type.GetProperties();
            Type underlyingType = type;

#if !UNITY_WSA
            if (properties.Length == 2 && string.Equals(properties[0].Name, "HasValue", StringComparison.InvariantCultureIgnoreCase)) underlyingType = properties[1].PropertyType;
#else
            if (properties.Length == 2 && string.Equals(properties[0].Name, "HasValue", StringComparison.OrdinalIgnoreCase)) underlyingType = properties[1].PropertyType;
#endif

            try
            {
                MethodInfo method = underlyingType.GetMethod("Parse", new[] { typeof(string), typeof(IFormatProvider) });
                if (method != null) obj = (T)method.Invoke(null, new object[] { value, RealWorldTerrainCultureInfo.numberFormat });
                else
                {
                    method = underlyingType.GetMethod("Parse", new[] { typeof(string) });
                    obj = (T)method.Invoke(null, new[] { value });
                }
            }
            catch (Exception exception)
            {
                Debug.Log(exception.Message + "\n" + exception.StackTrace);
                throw;
            }

            return obj;
        }
    }
}