using PCScreenSavers.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace PCScreenSavers.Business
{
    class Class_Config
    {
        private Class_Log log = new Class_Log();
        private App app = ((App)System.Windows.Application.Current);
        public void WriteToProgramConfig()
        {
            try
            {
                string fpath = Directory.GetCurrentDirectory() + "\\config\\";
                if (!Directory.Exists(fpath))
                {
                    DirectoryInfo directoryInfo = new DirectoryInfo(fpath);
                    directoryInfo.Create();
                }
                string strConfigxml = AppDomain.CurrentDomain.BaseDirectory + "config//Program.xml";
                if (File.Exists(strConfigxml) == true)
                {
                    XmlDocument doc = new XmlDocument();
                    doc.Load(strConfigxml);
                    XmlNode xnFirst = doc.SelectSingleNode("Config");
                    XmlNode xnSecond = xnFirst.SelectSingleNode("ProgramInfo");
                    if (xnSecond == null)
                    {
                        log.WriteLogFile("配置文件错误-未发现ProgramInfo标签");
                        return;
                    }
                    else
                    {
                        XmlNode xnnode = xnSecond.SelectSingleNode("CurrentPlayIndex");
                        if (xnnode == null)
                        {
                            XmlElement Node = doc.CreateElement("CurrentPlayIndex");
                            Node.InnerText = app.currentIndex.ToString();
                            xnSecond.AppendChild(Node);
                        }
                        else
                        {
                            xnSecond.SelectSingleNode("CurrentPlayIndex").InnerText = app.currentIndex.ToString();
                        }

                        xnnode = xnSecond.SelectSingleNode("PlayTime");
                        if (xnnode == null)
                        {
                            XmlElement Node = doc.CreateElement("PlayTime");
                            Node.InnerText = app.PlayTime.ToString();
                            xnSecond.AppendChild(Node);
                        }
                        else
                        {
                            xnSecond.SelectSingleNode("PlayTime").InnerText = app.PlayTime.ToString();
                        }
                    }
                    doc.Save(strConfigxml);
                }
                else
                {
                    XmlDocument doc = new XmlDocument(); // 创建dom对象
                    XmlDeclaration xmldecl;
                    xmldecl = doc.CreateXmlDeclaration("1.0", "gb2312", null);
                    doc.AppendChild(xmldecl);
                    XmlElement root = doc.CreateElement("Config"); // 创建根节点

                    doc.AppendChild(root);    //  加入到xml document
                    XmlElement FillItem;  // 创建FillItem元素

                    FillItem = doc.CreateElement("ProgramInfo");
                    root.AppendChild(FillItem);   // 添加到xml document

                    XmlElement Node = doc.CreateElement("CurrentPlayIndex");
                    Node.InnerText = app.currentIndex.ToString();
                    FillItem.AppendChild(Node);

                    Node = doc.CreateElement("PlayTime");
                    Node.InnerText = app.PlayTime.ToString();
                    FillItem.AppendChild(Node);

                    MemoryStream stream = new MemoryStream();
                    XmlTextWriter writer = new XmlTextWriter(stream, null);
                    writer.Formatting = System.Xml.Formatting.Indented;
                    doc.Save(writer);
                    StreamReader sr = new StreamReader(stream, Encoding.UTF8);

                    stream.Position = 0;

                    string XMLString = sr.ReadToEnd();
                    doc.Save(@"config\\Program.xml");   // 保存文件
                    sr.Close();
                    stream.Close();
                }


            }
            catch (Exception e)
            {
                log.WriteLogFile("WriteToProgramConfig:[" + e.ToString() + "]");
            }
        }

        /// <summary>
        /// /加载配置
        /// </summary>
        public void LoadProgramConfig()
        {
            try
            {
                string fpath = Directory.GetCurrentDirectory() + "\\config\\";
                if (!Directory.Exists(fpath))
                {
                    DirectoryInfo directoryInfo = new DirectoryInfo(fpath);
                    directoryInfo.Create();
                }
                string strConfigxml = AppDomain.CurrentDomain.BaseDirectory + "config//Program.xml";
                if (File.Exists(strConfigxml) == true)
                {
                    XmlDocument doc = new XmlDocument();
                    doc.Load(strConfigxml);
                    XmlNode xnFirst = doc.SelectSingleNode("Config");
                    XmlNode xnSecond = xnFirst.SelectSingleNode("ProgramInfo");
                    if (xnSecond == null)
                    {
                        log.WriteLogFile("配置文件错误-未发现ProgramInfo标签");
                        return;
                    }
                    else
                    {
                        app.currentIndex =Convert.ToInt32( xnSecond.SelectSingleNode("CurrentPlayIndex").InnerText);
                        app.currentIndex = app.currentIndex > 0 ? app.currentIndex - 1 : 0;
                        app.PlayTime =Convert.ToInt32( xnSecond.SelectSingleNode("PlayTime").InnerText);
                    }

                }
                else
                {
                    XmlDocument doc = new XmlDocument(); // 创建dom对象
                    XmlDeclaration xmldecl;
                    xmldecl = doc.CreateXmlDeclaration("1.0", "gb2312", null);
                    doc.AppendChild(xmldecl);
                    XmlElement root = doc.CreateElement("Config"); // 创建根节点

                    doc.AppendChild(root);    //  加入到xml document
                    XmlElement FillItem;  // 创建FillItem元素

                    FillItem = doc.CreateElement("ProgramInfo");
                    root.AppendChild(FillItem);   // 添加到xml document

                    XmlElement Node = doc.CreateElement("CurrentPlayIndex");
                    Node.InnerText = app.currentIndex.ToString();
                    FillItem.AppendChild(Node);

                    Node = doc.CreateElement("PlayTime");
                    Node.InnerText = app.PlayTime.ToString();
                    FillItem.AppendChild(Node);
                    MemoryStream stream = new MemoryStream();
                    XmlTextWriter writer = new XmlTextWriter(stream, null);
                    writer.Formatting = System.Xml.Formatting.Indented;
                    doc.Save(writer);
                    StreamReader sr = new StreamReader(stream, Encoding.UTF8);

                    stream.Position = 0;

                    string XMLString = sr.ReadToEnd();
                    doc.Save(@"config\\Program.xml");   // 保存文件
                    sr.Close();
                    stream.Close();
                }
            }
            catch (Exception e)
            {
                log.WriteLogFile("LoadProgramConfig:[" + e.ToString() + "]");
            }
        }
    }
}