using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml;
using Aitex.Core.RT.Log;
using Aitex.Core.Util;
using Npgsql;

namespace Aitex.Core.RT.ConfigCenter
{
    public class DeviceConfigManager2 : Singleton<DeviceConfigManager2>
    {
        public bool HasBoostPump { get; set; }

        public bool HasThrottleValve { get; set; }

        public void Initialize()
        {
            string fileDefault = string.Format("{0}\\config\\DeviceConfig.default.xml", Path.GetDirectoryName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName));
            string fileCurrent = string.Format("{0}\\config\\DeviceConfig.xml", Path.GetDirectoryName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName));

            if (!File.Exists(fileDefault) && !File.Exists(fileCurrent))
                throw new ApplicationException("没有找到DeviceConfig配置文件。\r\n"+fileDefault + "\r\n或者" + fileCurrent);

            if (File.Exists(fileDefault))
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(fileDefault);

                try
                {
                    ParseNode(doc );
                }
                catch (Exception ex)
                {
                    LOG.WriteExeption(ex);
                }
                
            }

            if (File.Exists(fileCurrent))
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(fileCurrent);

                try
                {
                    ParseNode(doc );
                }
                catch (Exception ex)
                {
                    LOG.WriteExeption(ex);
                }
            }

            CONFIG.Subscribe("Device", "HasBoostPump", () => HasBoostPump);
            CONFIG.Subscribe("Device", "HasThrottleValve", () => HasThrottleValve);
        }

        public bool ParseBoolenNode(XmlDocument doc, string type)
        {
            var node = doc.SelectSingleNode(string.Format("DeviceConfig/DeviceConfigItem[@Type='{0}']", type));
            if (node == null)
                return false;

            var element = node as XmlElement;
            if (element == null)
                return false;

            bool result = false;
            if (element.HasAttribute("Value") && !string.IsNullOrEmpty(element.GetAttribute("Value")))
            {
                if (!bool.TryParse(element.GetAttribute("Value").Trim(), out result))
                {
                    //LOG.Write(string.Format("Error format in device config item, type {0}, value {1}", type, element.GetAttribute("Value").Trim()));
                }
            }
            return result;
        }

        public void ParseNode(XmlDocument doc)
        {
            HasBoostPump = ParseBoolenNode(doc, "HasBoostPump");

            HasThrottleValve = ParseBoolenNode(doc, "HasThrottleValve"); 
        }

        void Update(string type, string value)
        {
            switch (type)
            {
                case "HasBoostPump" :
                    HasBoostPump = bool.Parse(value);
                    break;
                case "HasThrottleValve" :
                    HasThrottleValve = bool.Parse(value);
                    break;
            }
        }

        public void SetConfig(string type, string value)
        {
            string fileCurrent = string.Format("{0}\\config\\DeviceConfig.xml", Path.GetDirectoryName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName));
 
            XmlDocument doc = new XmlDocument();

            if (File.Exists(fileCurrent))
            {
                doc.Load(fileCurrent);
            }
            else
            {
                doc.LoadXml("<?xml version=\"1.0\" encoding=\"utf-8\" ?><DeviceConfig></DeviceConfig>");
            }

            var nodeRoot = doc.SelectSingleNode(string.Format("DeviceConfig"));
            if (nodeRoot == null)
            {
                nodeRoot = doc.CreateElement("DeviceConfig");
                doc.AppendChild(nodeRoot);
            }
       
            var node = doc.SelectSingleNode(string.Format("DeviceConfig/DeviceConfigItem[@Type='{0}']", type)) as XmlElement;
            if (node == null)
            {
                node = doc.CreateElement("DeviceConfigItem");
                nodeRoot.AppendChild(node);
            }
            node.SetAttribute("Type", type);
            node.SetAttribute("Value", value);

            doc.Save(fileCurrent);

            Update(type, value);
        }

    }
}