using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;

namespace ServiceHelper
{
    public class ManagerXml
    {
        private XmlDocument _xmlDocument;
        private string _fileName;
        
        private const string USETASK = "UseTask";
        private const string TASKDAYSINTERVAL = "TaskDaysInterval";
        private const string TASKSTARTBOUNDARY = "TaskStartBoundary";

        public ManagerXml(string fileName)
        {
            _xmlDocument = new XmlDocument();
            _xmlDocument.Load(fileName);
            _fileName = fileName;

            //检查配置文件中配置项是否齐全，补齐缺漏
            List<string> nodeNames = new List<string>();
            nodeNames.Add(USETASK);
            nodeNames.Add(TASKDAYSINTERVAL);
            nodeNames.Add(TASKSTARTBOUNDARY);

            XmlNode appSettringNode = _xmlDocument.SelectSingleNode("//appSettings");

            foreach (string nodeName in nodeNames)
            {
                XmlNode node = _xmlDocument.SelectSingleNode("//appSettings/add[@key='" + nodeName + "']");
                if (node == null)
                {
                    XmlElement newElement = _xmlDocument.CreateElement("add");
                    newElement.SetAttribute("key", nodeName);
                    string defaultValue = "";
                    switch (nodeName)
                    {
                        case USETASK:
                            defaultValue = "false";
                            break;
                        case TASKDAYSINTERVAL:
                            defaultValue = "1";
                            break;
                        case TASKSTARTBOUNDARY:
                            defaultValue = "06:00:00";
                            break;
                    }
                    newElement.SetAttribute("value", defaultValue);
                    appSettringNode.AppendChild(newElement);
                }
            }
            _xmlDocument.Save(_fileName);
        }

        public string Get(string name)
        {
            XmlNode node = _xmlDocument.SelectSingleNode("//appSettings/add[@key='" + name + "']");
            return node.Attributes.GetNamedItem("value").Value;
        }

        public void Set(string name, string value)
        {
            XmlNode node = _xmlDocument.SelectSingleNode("//appSettings/add[@key='" + name + "']");
            node.Attributes.GetNamedItem("value").Value = value;
            _xmlDocument.Save(_fileName);
        }

        public string GetLogLevel()
        {
            XmlNode node = _xmlDocument.SelectSingleNode("//log4net/root/level");
            return node.Attributes.GetNamedItem("value").Value;
        }

        public void SetLogLevel(string level)
        {
            XmlNode node = _xmlDocument.SelectSingleNode("//log4net/root/level");
            node.Attributes.GetNamedItem("value").Value = level;
            _xmlDocument.Save(_fileName);
        }
    }
}