using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Text;
using System.Xml;

namespace CommonLib
{
    public class XMLHelper
    {
        public XMLHelper()
        {

        }

        public void Create<T>(string xmlPath, List<T> updateXMLs)
        {
            XmlDocument document = new XmlDocument();
            Type type = typeof(T);
            document.AppendChild(document.CreateXmlDeclaration("1.0", "utf-8", null));
            XmlElement root = document.CreateElement(type.Name + "Collection");
            PropertyInfo[] properties = type.GetProperties();
            foreach (var updateXml in updateXMLs)
            {
                XmlElement parentElememt = document.CreateElement(type.Name);
                foreach (PropertyInfo property in properties)
                {
                    XmlElement element = document.CreateElement(property.Name);
                    element.InnerText = updateXml.GetPropertyValue(property).ToString();
                    parentElememt.AppendChild(element);
                }
                root.AppendChild(parentElememt);
            }
            document.AppendChild(root);
            document.Save(xmlPath);
        }

        public List<T> Read<T>(string updatexml) where T : new()
        {
            XmlDocument document = new XmlDocument();
            document.Load(updatexml);
            List<T> tList = new List<T>();
            foreach (XmlNode node in document.ChildNodes[1].ChildNodes)
            {
                T t = new T();
                foreach (XmlNode childNode in node.ChildNodes)
                {
                    t.SetPropertyValue(childNode.Name, childNode.InnerText);
                }
                tList.Add(t);
            }
            return tList;
        }


        public List<T> ReadContext<T>(string context) where T : new()
        {
            XmlDocument document = new XmlDocument();
            byte[] bytes = Encoding.UTF8.GetBytes(context);
            MemoryStream ms = new MemoryStream(bytes);
            ms.Seek(0, SeekOrigin.Begin);
            document.Load(ms);
            List<T> tList = new List<T>();
            foreach (XmlNode node in document.ChildNodes[1].ChildNodes)
            {
                T t = new T();
                foreach (XmlNode childNode in node.ChildNodes)
                {
                    t.SetPropertyValue(childNode.Name, childNode.InnerText);
                }
                tList.Add(t);
            }
            return tList;
        }
    }
}