using System.Collections.Generic;

using System.DirectoryServices;

using System.Linq;

using Microsoft.Web.Administration; //位于：C:\Windows\System32\inetsrv\Microsoft.Web.Administration.dll

namespace Whir.Software.IISManager.IISManager

{

    /// <summary>

    ///     IIS应用程序池辅助类

    /// </summary>

    public class AppPoolService

    {

        protected static string Host = "localhost";

        /// <summary>

        ///     取得所有应用程序池

        /// </summary>

        /// <returns></returns>

        public static List<string> GetAppPools()

        {

            var appPools = new DirectoryEntry(string.Format("IIS://{0}/W3SVC/AppPools", Host));

            return (from DirectoryEntry entry in appPools.Children select entry.Name).ToList();

        }

        /// <summary>

        ///     取得单个应用程序池

        /// </summary>

        /// <returns></returns>

        public static ApplicationPool GetAppPool(string appPoolName)

        {

            ApplicationPool app = null;

            var appPools = new DirectoryEntry(string.Format("IIS://{0}/W3SVC/AppPools", Host));

            foreach (DirectoryEntry entry in appPools.Children)

            {

                if (entry.Name == appPoolName)

                {

                    var manager = new ServerManager();

                    app = manager.ApplicationPools[appPoolName];

                }

            }

            return app;

        }

        /// <summary>

        ///     判断程序池是否存在

        /// </summary>

        /// <param name="appPoolName">程序池名称</param>

        /// <returns>true存在 false不存在</returns>

        public static bool IsAppPoolExsit(string appPoolName)

        {

            bool result = false;

            var appPools = new DirectoryEntry(string.Format("IIS://{0}/W3SVC/AppPools", Host));

            foreach (DirectoryEntry entry in appPools.Children)

            {

                if (entry.Name.Equals(appPoolName))

                {

                    result = true;

                    break;

                }

            }

            return result;

        }

        /// <summary>

        ///     删除指定程序池

        /// </summary>

        /// <param name="appPoolName">程序池名称</param>

        /// <returns>true删除成功 false删除失败</returns>

        public static bool DeleteAppPool(string appPoolName)

        {

            bool result = false;

            var appPools = new DirectoryEntry(string.Format("IIS://{0}/W3SVC/AppPools", Host));

            foreach (DirectoryEntry entry in appPools.Children)

            {

                if (entry.Name.Equals(appPoolName))

                {

                    try

                    {

                        entry.DeleteTree();

                        result = true;

                        break;

                    }

                    catch

                    {

                        result = false;

                    }

                }

            }

            return result;

        }

        /// <summary>

        ///     创建应用程序池

        /// </summary>

        /// <param name="appPool"></param>

        /// <returns></returns>

        public static bool CreateAppPool(string appPool)

        {

            try

            {

                if (!IsAppPoolExsit(appPool))

                {

                    var appPools = new DirectoryEntry(string.Format("IIS://{0}/W3SVC/AppPools", Host));

                    DirectoryEntry entry = appPools.Children.Add(appPool, "IIsApplicationPool");

                    entry.CommitChanges();

                    return true;

                }

            }

            catch

            {

                return false;

            }

            return false;

        }

        /// <summary>

        ///     编辑应用程序池

        /// </summary>

        /// <param name="application"></param>

        /// <returns></returns>

        public static bool EditAppPool(ApplicationPool application)

        {

            try

            {

                if (IsAppPoolExsit(application.Name))

                {

                    var manager = new ServerManager();

                    manager.ApplicationPools[application.Name].ManagedRuntimeVersion = application.ManagedRuntimeVersion;

                    manager.ApplicationPools[application.Name].ManagedPipelineMode = application.ManagedPipelineMode;

                    //托管模式Integrated为集成 Classic为经典

                    manager.CommitChanges();

                    return true;

                }

            }

            catch

            {

                return false;

            }

            return false;

        }

    }

}