using log4net;
using log4net.Config;
using log4net.Core;
using log4net.Repository.Hierarchy;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Text;
using KPlan.Util;

namespace KPlan.Logger {
   public class TLogManager {
      public enum StateType {
         On,
         Off,
         AlwaysON,
         AlwaysOff
      }

      private const string LoggerStateKey = "LoggerState";

      private static TLogManager.StateType globalState;

      private bool isConfigured;

      private string configPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "..\\..\\SyncTaskStatus\\Logger");

      private string configName = "LogConfig.xml";

      private bool isWatching = true;

      private Level OldLevel = Level.All;

      private TLogManager.StateType logState = TLogManager.StateType.Off;

      private static List<TLogManager> loggers = new List<TLogManager>();

      public TLogManager.StateType State {
         get {
            return this.logState;
         }
         set {
            this.logState = value;
            if (this.logState == TLogManager.StateType.Off || this.logState == TLogManager.StateType.AlwaysOff) {
               this.OldLevel = ((Hierarchy)LogManager.GetRepository()).Root.Level;
               ((Hierarchy)LogManager.GetRepository()).Root.Level = Level.Off;
               return;
            }
            ((Hierarchy)LogManager.GetRepository()).Root.Level = this.OldLevel;
         }
      }

      public static TLogManager.StateType GlobalState {
         get {
            return TLogManager.globalState;
         }
         set {
            TLogManager.globalState = value;
            TLogManager.ChangeState(TLogManager.globalState);
         }
      }

      public bool IsOn {
         get {
            return this.logState != TLogManager.StateType.Off;
         }
      }

      public bool IsConfigured {
         get {
            return this.isConfigured;
         }
      }

      public bool IsWatching {
         get {
            return this.isWatching;
         }
         set {
            this.isWatching = value;
            this.Configure();
         }
      }

      public string ConfigName {
         get {
            return this.configName;
         }
         set {
            this.configName = value;
            this.Configure();
         }
      }

      public string ConfigPath {
         get {
            return this.configPath;
         }
         set {
            this.configPath = value;
            this.Configure();
         }
      }

      public string ConfigFile {
         get {
            return Path.Combine(this.configPath, this.configName);
         }
      }

      public TLogManager() {
         TLogManager.loggers.Add(this);
      }

      public static void SetStateFromConfig() {
         //string text = ConfigurationManager.AppSettings["LoggerState"];
         string text = KUtil.GetConfigValue(KConfigure.LOG_SECTION,KConfigure.LOG_SWITCH);
         TLogManager.GlobalState = ((!string.IsNullOrEmpty(text) && text.ToUpper() == "ON") ? TLogManager.StateType.On : TLogManager.StateType.Off);

      }

      public static TLogManager Create(string logDir) {
         return new TLogManager {
            State = TLogManager.GlobalState,
            ConfigPath = logDir
         };
      }

      public static TLogManager Create() {
         //string Path = ConfigurationManager.AppSettings["LogPath"];
         string Path = KUtil.GetConfigValue(KConfigure.LOG_SECTION, KConfigure.LOG_CONFIG_PATH);
         if (!string.IsNullOrEmpty(Path))
            return TLogManager.Create(Path);
         else
            return TLogManager.Create("..\\..\\Logger");
      }

      public TLogAgent GetLogger(string subSystem) {
         return new TLogAgent(this, subSystem);
      }

      public TLogAgent GetLogger(Type t) {
         return this.GetLogger(t.Name);
      }

      public TLogAgent GetLogger(object o) {
         return this.GetLogger(o.GetType());
      }

      public void Configure() {
         FileInfo fileInfo = new FileInfo(this.ConfigFile);
         if (!fileInfo.Exists) {
            this.isConfigured = false;
            return;
         }
         if (this.IsWatching) {
            XmlConfigurator.ConfigureAndWatch(fileInfo);
         }
         else {
            XmlConfigurator.Configure(fileInfo);
         }
         this.isConfigured = true;

      }

      public void ConfigureFromString(string xml) {
         Stream configStream = new MemoryStream(Encoding.Default.GetBytes(xml));
         XmlConfigurator.Configure(configStream);
         this.isWatching = false;
         this.isConfigured = true;
      }

      private static void ChangeState(TLogManager.StateType state) {
         foreach (TLogManager current in TLogManager.loggers) {
            if (current.State != TLogManager.StateType.AlwaysON && current.State != TLogManager.StateType.AlwaysOff) {
               current.State = state;
            }
         }
      }
   }
}