using Microsoft.AspNetCore.Mvc.ViewFeatures;
using System;
using System.IO;
using System.Text;
using System.Xml;
using System.Xml.Serialization;


namespace IStation.Application
{
    /// <summary>
    /// 
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class XmlHelper<T> where T : class
    {
        /// <summary>
        /// 对象生成Xml文档
        /// </summary>
        public string ObjectToXml(T obj)
        {
            using (TextWriter writer = new StringWriter())
            {
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(writer, obj) ;
                return writer.ToString();
            }
        }


        /// <summary>
        /// xml文档生成类
        /// </summary>
        public T XmlToObject(string xmlStr)
        {
            try
            {
                using (StringReader reader = new StringReader(xmlStr))
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(T));
                    return serializer.Deserialize(reader) as T;
                }
            }
            catch (Exception ex)
            {
                var a = ex.Message;
                return null;
            }
        }


        /// <summary>
        /// 数据输出，序列化xml文本 
        /// </summary>
        /// <returns></returns>
        public static string FileOutput(T obj)
        {
            var xml = string.Empty;
            try
            {
                using (MemoryStream ms = new MemoryStream())
                {
                    var setting = new XmlWriterSettings()
                    {
                        Encoding = new UTF8Encoding(false),
                        Indent = true,
                    };
                    using (XmlWriter writer = XmlWriter.Create(ms, setting))
                    {
                        XmlSerializer xmlSearializer = new XmlSerializer(obj.GetType());
                        xmlSearializer.Serialize(writer, obj);
                        xml= Encoding.UTF8.GetString(ms.ToArray());
                    }
                }
            }
            catch (Exception)
            {
                LogHelper.Error("报表Json文件格式化失败! ");
            }
            return xml;
        }

        /// <summary>
        /// 保存对象到xml文件中
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="fileName"></param>
        /// <param name="t"></param>
        public static void SaveObjectXmlFile<T>(string fileName, T t) where T : class
        {
            var str = XmlHelper<T>.FileOutput(t);
            UTF8Encoding utf8 = new UTF8Encoding(false);
            File.WriteAllText(fileName, str, utf8);
        }


    }
}