using log4net;
using System.IO;
using System.Reflection;

namespace Bro.Common.Log
{
    public class LogHelper
    {
        public const string         DFT_CONFIG_FILE = "BroC.Comn.Log.BroClog4net.xml";

        private static ILog         log         = null;

        private static LogHelper inst;

        /// <summary>
        /// 初始化
        /// </summary>
        /// <returns></returns>
        public static LogHelper GetInstance()
        {
            if (inst == null)
                inst = new LogHelper(null);
            return inst;
        }
        /// <summary>
        /// 初始化
        /// </summary>
        /// <param name="configPath"></param>
        /// <returns></returns>
        public static LogHelper GetInstance(string configPath)
        {
            if (inst == null)
                inst = new LogHelper(configPath);
            return inst;
        }
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="configPath"></param>
        private LogHelper(string configPath)
        {
            var type = System.Reflection.MethodBase.GetCurrentMethod().DeclaringType;
            log = log4net.LogManager.GetLogger(type);
            
            // 1. 优先使用手动指定的log4net配置文件
            // 2. 不存在手动指定配置文件，则使用默认配置
            if (!string.IsNullOrEmpty(configPath) && File.Exists(configPath))
            {
                try
                {
                    log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo(configPath));
                }
                catch
                {
                    // 默认的log4net配置文件作为内嵌式文件编译进应用集合内
                    var sm = Assembly.GetExecutingAssembly().GetManifestResourceStream(DFT_CONFIG_FILE); 
                    log4net.Config.XmlConfigurator.Configure(sm);
                }
            }
            else
            {
                // 默认的log4net配置文件作为内嵌式文件编译进应用集合内
                var sm = Assembly.GetExecutingAssembly().GetManifestResourceStream(DFT_CONFIG_FILE); 
                log4net.Config.XmlConfigurator.Configure(sm);
            }
        }

        #region 各级别日志方法


        public void Debug(string msg)
        {
            
            log.Debug(msg);
        }

        public void DebugFormat(string format, params object[] args)
        {
            log.DebugFormat(format, args);
        }

        public void Info(string msg)
        {
            log.Info(msg);
        }

        public void InfoFormat(string format, params object[] args)
        {
            log.InfoFormat(format, args);
        }

        public void Warn(string msg)
        {
            log.Warn(msg);
        }

        public void WarnFormat(string format, params object[] args)
        {
            log.WarnFormat(format, args);
        }

        public void Error(string msg)
        {
            log.Error(msg);
        }

        public void ErrorFormat(string format, params object[] args)
        {
            log.ErrorFormat(format, args);
        }

        public void Fatal(string msg)
        {
            log.Fatal(msg);
        }

        public void FatalFormat(string format, params object[] args)
        {
            log.FatalFormat(format, args);
        }

        #endregion
    }
}