using System;
using System.IO;
using System.Reflection;
using System.Xml;

namespace CVE.LogViewer
{
    public class Helper
    {
        private const string FileName = "LogConfig.xml";
        public Stream GetXMLStream(string ConfigDir)
        {
            if (!System.IO.Directory.Exists(ConfigDir))
            {
                System.IO.Directory.CreateDirectory(ConfigDir);//不存在就创建目录
            }

            string ConfigPath = ConfigDir + "\\" + FileName;
            //判断本地是否存在配置文件
            if (File.Exists(ConfigPath))
            {
                //导入本地配置文件
                Stream stream = new FileStream(ConfigPath, FileMode.Open, FileAccess.Read);
                return stream;
            }
            else
            {
                //载入程序集中配置文件
                var assembly = Assembly.GetExecutingAssembly();
                var stream = assembly.GetManifestResourceStream(this.GetType(), FileName);
                try
                {
                    if (stream == null)
                    {
                        throw new FileNotFoundException("Could not find embedded mappings resource file.", FileName);
                    }
                    else
                    {
                        //将默认配置文件保存至指定目录
                        XmlDocument doc = new XmlDocument();
                        doc.Load(stream);
                        doc.Save(ConfigPath);
                    }

                }
                catch (Exception ex)
                {
                    throw ex;
                }
                return stream;
            }
        }
    }
}