using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Xml;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Xml.Serialization;
using System.IO;
using System.Text.RegularExpressions;


namespace Pcb.Common
{
    /// <summary>
    /// XmlHelper 的摘要说明
    /// </summary>
    public class XmlHelper
    {
        public XmlHelper()
        {
        }

        /// <summary>
        /// 返回XmlDocument对象
        /// </summary>
        /// <param name="path">路径</param>
        /// <returns></returns>
        public static XmlDocument GetXmlDoc(string path)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                return doc;
            }
            catch
            {
                return null;
            }
        }
        /// <summary>
        /// 读取数据
        /// </summary>
        /// <param name="path">路径</param>
        /// <param name="node">节点</param>
        /// <param name="attribute">属性名，非空时返回该属性值，否则返回串联值</param>
        /// <returns>string</returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Read(path, "/Node", "")
         * XmlHelper.Read(path, "/Node/Element[@Attribute='Name']", "Attribute")
         ************************************************/
        public static string Read(string path, string node, string attribute)
        {
            string value = "";
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                XmlNode xn = doc.SelectSingleNode(node);
                value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
            }
            catch (Exception ee) { return ee.Message.ToString(); }
            return value;
        }

        public static string Read(XmlDocument doc, string node, string attribute)
        {
            string value = "";
            try
            {
                XmlNode xn = doc.SelectSingleNode(node);
                value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
            }
            catch { }
            return value;
        }

        /// <summary>
        /// 读取节点
        /// </summary>
        /// <param name="path"></param>
        /// <param name="node"></param>
        /// <returns></returns>
        public static XmlNode Read(string path, string node)
        {
            XmlNode xn = null;
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(HttpContext.Current.Server.MapPath("~")+path);
                xn = doc.SelectSingleNode(node);
                return xn;
            }
            catch
            {
                return null;
            }
        }
        /// <summary>
        /// 获取子集列表
        /// </summary>
        /// <param name="path"></param>
        /// <param name="node"></param>
        /// <returns></returns>
        public static List<XmlNode> ReadChildList(string path, string node)
        {
            List<XmlNode> list = new List<XmlNode>();
            try
            {
                XmlDocument doc = new XmlDocument();
                 
                doc.Load(AppDomain.CurrentDomain.BaseDirectory + path);
                XmlNode xn = doc.SelectSingleNode(node);
                foreach (XmlNode xn2 in xn.ChildNodes)
                {
                    list.Add(xn2);
                }
            }
            catch(Exception ex) { LogHelper.Error(ex.ToString()); }
            return list;
        }

        public static XmlNodeList ReadXmlNodeList(string path, string node)
        {
            XmlNodeList list = null;
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                return doc.SelectNodes(node);
            }
            catch
            {
            }
            return list;
        }


        public static XmlNodeList ReadXmlNodeList(XmlDocument doc, string node)
        {
            XmlNodeList list = null;
            try
            {
                return doc.SelectNodes(node);
            }
            catch
            {
            }
            return list;
        }

        /// <summary>
        /// 插入数据
        /// </summary>
        /// <param name="path">路径</param>
        /// <param name="node">节点</param>
        /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
        /// <param name="attribute">属性名，非空时插入该元素属性值，否则插入元素值</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Insert(path, "/Node", "Element", "", "Value")
         * XmlHelper.Insert(path, "/Node", "Element", "Attribute", "Value")
         * XmlHelper.Insert(path, "/Node", "", "Attribute", "Value")
         ************************************************/
        public static void Insert(string path, string node, string element, string attribute, string value)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                string[] attrs = { attribute };
                string[] vals = { value };
                Insert(doc, path, node, element, attrs, vals);
            }
            catch { }
        }

        public static void Insert(string path, string node, string element, string[] attribute, string[] value)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);

                Insert(doc, path, node, element, attribute, value);
            }
            catch { }
        }

        public static void Insert(XmlDocument doc, string path, string node, string element, string[] attributes, string[] values)
        {
            try
            {
                XmlNode xn = doc.SelectSingleNode(node);
                if (element.Equals(""))
                {
                    if (attributes.Length > 0)
                    {
                        XmlElement xe = (XmlElement)xn;
                        for (int i = 0; i < attributes.Length; i++)
                        {
                            xe.SetAttribute(attributes[i], values[i]);
                        }
                    }
                }
                else
                {
                    XmlElement xe = doc.CreateElement(element);
                    if (attributes.Length <= 0)
                        xe.InnerText = values[0];
                    else
                    {
                        for (int i = 0; i < attributes.Length; i++)
                        {
                            xe.SetAttribute(attributes[i], values[i]);
                        }
                    }
                    xn.AppendChild(xe);
                }
                doc.Save(path);
            }
            catch { }
        }


        /// <summary>
        /// 修改数据
        /// </summary>
        /// <param name="path">路径</param>
        /// <param name="node">节点</param>
        /// <param name="attribute">属性名，非空时修改该节点属性值，否则修改节点值</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Insert(path, "/Node", "", "Value")
         * XmlHelper.Insert(path, "/Node", "Attribute", "Value")
         ************************************************/
        public static void Update(string path, string node, string attribute, string value)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                XmlNode xn = doc.SelectSingleNode(node);
                XmlElement xe = (XmlElement)xn;
                if (attribute.Equals(""))
                    xe.InnerText = value;
                else
                    xe.SetAttribute(attribute, value);
                doc.Save(path);
            }
            catch (Exception ee) { }
        }

        public static void Update(XmlDocument doc, string path, string node, string attribute, string value)
        {
            try
            {
                XmlNode xn = doc.SelectSingleNode(node);
                XmlElement xe = (XmlElement)xn;
                if (attribute.Equals(""))
                    xe.InnerText = value;
                else
                    xe.SetAttribute(attribute, value);
                doc.Save(path);
            }
            catch { }
        }

        /// <summary>
        /// 更新子节点
        /// </summary>
        /// <param name="path"></param>
        /// <param name="node"></param>
        /// <param name="xml"></param>
        public static void UpdateXml(string path, string node, string xml)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                XmlNode xn = doc.SelectSingleNode(node);
                XmlElement xe = (XmlElement)xn;
                xe.InnerXml = xml;

                doc.Save(path);
            }
            catch { }
        }

        /// <summary>
        /// 删除数据
        /// </summary>
        /// <param name="path">路径</param>
        /// <param name="node">节点</param>
        /// <param name="attribute">属性名，非空时删除该节点属性值，否则删除节点值</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Delete(path, "/Node", "")
         * XmlHelper.Delete(path, "/Node", "Attribute")
         ************************************************/
        public static void Delete(string path, string node, string attribute)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(path);
                XmlNode xn = doc.SelectSingleNode(node);
                XmlElement xe = (XmlElement)xn;
                if (attribute.Equals(""))
                    xn.ParentNode.RemoveChild(xn);
                else
                    xe.RemoveAttribute(attribute);
                doc.Save(path);
            }
            catch { }
        }

        public static XmlDocument GetRemoteXml(string URL)
        {
            //使用rssURL的值建立了一个WebRequest项
            System.Net.WebRequest myRequest = System.Net.WebRequest.Create(URL);
            //WebRequest请求的响应将会被放到一个WebResponse对象myResponse里,然后这个WebResponse对象被用来建立一个流来取出XML的值
            System.Net.WebResponse myResponse = myRequest.GetResponse();
            System.IO.Stream stream = myResponse.GetResponseStream();
            //使用一个XmlDocument对象rssDoc来存储流中的XML内容。XmlDocument对象用来调入XML的内容
            System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
            doc.Load(stream);
            return doc;
        }



        public static bool SuccessResponse(string xml, out string msg)
        {
            try
            {
                if (xml.Trim().Length == 0)
                {
                    msg = string.Empty;
                    return false;
                }
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(xml);

                int code = GetXmlAttr<int>(doc, "//Response", "code");
                msg = GetXmlAttr<string>(doc, "//Response", "msg");

                return code == 200;

            }
            catch (Exception ex)
            {
                msg = "SuccessResponse:" + ex.Message;
                return false;
            }
        }

        public static bool SuccessResponse(string xml)
        {
            try
            {
                if (xml.Trim().Length == 0)
                {
                    return false;
                }
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(xml);

                int code = GetXmlAttr<int>(doc, "//Response", "code");

                return code == 200;

            }
            catch (Exception)
            {
                return false;
            }
        }


        /// <summary>
        /// 对象序列化成 XML String
        /// </summary>
        public static string XmlSerialize<T>(T obj)
        {

            if (obj == null)
            {
                return null;
            }

            XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
            ////Add an empty namespace and empty value
            ns.Add("", "");

            MemoryStream Stream = new MemoryStream();
            XmlSerializer xml = new XmlSerializer(typeof(T));
            try
            {
                //序列化对象
                xml.Serialize(Stream, obj, ns);
            }
            catch (InvalidOperationException)
            {
                return null;
            }
            Stream.Position = 0;
            StreamReader sr = new StreamReader(Stream);
            string str = sr.ReadToEnd();

            sr.Dispose();
            Stream.Dispose();

            Regex reg2 = new Regex(@"<[?]xml[\w\W]+?[?]>");
            str = reg2.Replace(str, string.Empty).Trim();
            return str;



        }

        /// <summary>
        /// XML String 反序列化成对象
        /// </summary>
        public static T XmlDeserialize<T>(string xmlString)
        {
            try
            {
                using (StringReader sr = new StringReader(xmlString))
                {
                    XmlSerializer xmldes = new XmlSerializer(typeof(T));
                    return (T)xmldes.Deserialize(sr);
                }
            }
            catch (Exception e)
            {

                return default(T);
            }
        }

        public static T GetXmlAttr<T>(string xml, string path, string attrName)
        {
            if (xml.Trim().Length == 0)
            {
                return default(T);
            }
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(xml);
            if (doc == null)
            {
                return default(T);
            }
            var node = doc.SelectSingleNode(path);
            if (node == null)
            {
                return default(T);
            }
            if (node.Attributes[attrName] == null)
            {
                return default(T);
            }

            return (T)Convert.ChangeType(node.Attributes[attrName].Value, typeof(T));
        }

        public static T GetXmlAttr<T>(XmlDocument doc, string path, string attrName)
        {
            if (doc == null)
            {
                return default(T);
            }
            var node = doc.SelectSingleNode(path);
            if (node == null)
            {
                return default(T);
            }
            if (node.Attributes[attrName] == null)
            {
                return default(T);
            }

            return (T)Convert.ChangeType(node.Attributes[attrName].Value, typeof(T));
        }

        public static string GetXml(XmlDocument doc, string path)
        {
            if (doc == null)
            {
                return string.Empty;
            }
            var node = doc.SelectSingleNode(path);
            if (node == null)
            {
                return string.Empty;
            }

            return node.InnerXml;
        }
        public static T GetValue<T>(XmlDocument doc, string path)
        {
            if (doc == null)
            {
                return default(T);
            }
            var node = doc.SelectSingleNode(path);
            if (node == null)
            {
                return default(T);
            }

            return (T)Convert.ChangeType(node.InnerText, typeof(T));
        }

        XmlDocument doc = null;

        XmlElement responseNode = null;
        XmlElement resultStart = null;
        public XmlHelper(int code)
        {
            doc = new XmlDocument();
            responseNode = doc.CreateElement("Response");
            responseNode.SetAttribute("code", code.ToString());

        }


        public void Add(string name, object value)
        {
            XmlElement el = doc.CreateElement(name);
            el.InnerText = Convert.ToString(value).Trim();
            resultStart.AppendChild(el);
        }
        public void AddResultTagBegin(string name)
        {
            resultStart = doc.CreateElement(name);

        }

        public void AddResultTagBegin()
        {
            AddResultTagBegin("Result");

        }

        public void AddResultTagEnd()
        {
            responseNode.AppendChild(resultStart);
        }

        public override string ToString()
        {
            doc.AppendChild(responseNode);
            string xml = doc.OuterXml.ToString();
            return xml;
        }



    }
}