using System;

using System.Linq;

using Microsoft.VisualStudio.Shell;

using EnvDTE;

using System.Runtime.InteropServices;

using Microsoft.VisualStudio;

using Microsoft.VisualStudio.Shell.Interop;

using System.Collections.Generic;

using CKS.Dev11.VisualStudio.SharePoint.Environment;

using Microsoft.VisualStudio.SharePoint;

using IOleServiceProvider = Microsoft.VisualStudio.OLE.Interop.IServiceProvider;



namespace CKS.Dev11.VisualStudio.SharePoint

{

    /// <summary>

    /// The DTE manager to provide functionality for the DTE.

    /// </summary>

    public static class DTEManager

    {

        /// <summary>

        /// The SharePoint Project type ID

        /// </summary>

        static readonly Guid SharePointProjectTypeID = new Guid("BB1F664B-9266-4FD6-B973-E1E44974B511");



        static IOleServiceProvider _globalOleServiceProvider;

        static IServiceProvider _globalServiceProvider;

        static ISharePointProjectService _projectService;



        /// <summary>

        /// Gets or sets the DTE.

        /// </summary>

        /// <value>The DTE.</value>

        public static DTE DTE { get; private set; }



        /// <summary>

        /// Gets the active solution.

        /// </summary>

        /// <value>The active solution.</value>

        public static Solution ActiveSolution

        {

            get { return DTE.Solution; }

        }



        /// <summary>

        /// Gets the active project.

        /// </summary>

        /// <returns></returns>

        public static EnvDTE.Project ActiveProject

        {

            get

            {

                EnvDTE.Project project = null;

                object[] projects = DTE.ActiveSolutionProjects;

                if ((projects != null) && (projects.Length > 0))

                {

                    project = projects[0] as EnvDTE.Project;

                }

                return project;

            }

        }



        /// <summary>

        /// Gets the active SharePoint project.

        /// </summary>

        /// <returns></returns>

        public static ISharePointProject ActiveSharePointProject

        {

            get

            {

                EnvDTE.Project project = null;



                object[] projects = DTE.ActiveSolutionProjects;

                if ((projects != null) && (projects.Length > 0))

                {

                    project = projects[0] as EnvDTE.Project;

                    return ProjectService.Convert<EnvDTE.Project, Microsoft.VisualStudio.SharePoint.ISharePointProject>(project);

                }

                return null;

            }

        }



        /// <summary>

        /// Gets the all SharePoint projects.

        /// </summary>

        /// <returns></returns>

        public static List<ISharePointProject> SharePointProjects

        {

            get

            {

                List<ISharePointProject> projects = new List<ISharePointProject>();

                foreach (ISharePointProject project in ProjectService.Projects)

                {

                    projects.Add(project);

                }

                return projects;

            }

        }



        /// <summary>

        /// Gets the selected item.

        /// </summary>

        /// <value>The selected item.</value>

        public static SelectedItem SelectedItem

        {

            get

            {

                return DTE.SelectedItems.Item(1);

            }

        }



        /// <summary>

        /// Gets the project service.

        /// </summary>

        /// <value>The project service.</value>

        public static ISharePointProjectService ProjectService

        {

            get

            {

                if (_projectService == null)

                {

                    _projectService = (ISharePointProjectService)_globalServiceProvider.GetService(typeof(ISharePointProjectService));

                }

                return _projectService;

            }

        }



        /// <summary>

        /// Initializes the <see cref="DTEManager"/> class.

        /// </summary>

        static DTEManager()

        {

            DTE = (DTE)Microsoft.VisualStudio.Shell.Package.GetGlobalService(typeof(EnvDTE.DTE));

            _globalOleServiceProvider = (IOleServiceProvider)DTE;

            _globalServiceProvider = new ServiceProvider(_globalOleServiceProvider);

        }



        /// <summary>

        /// Gets the language file extension.

        /// </summary>

        /// <param name="projectItem">The project item.</param>

        /// <returns></returns>

        public static string GetLanguageFileExtension(ProjectItem projectItem)

        {

            switch (projectItem.ContainingProject.CodeModel.Language)

            {

                case "{B5E9BD34-6D3E-4B5D-925E-8A43B79820B4}":

                    return ".cs";



                case "{B5E9BD33-6D3E-4B5D-925E-8A43B79820B4}":

                    return ".vb";

            }

            throw new NotSupportedException();

        }



        /// <summary>

        /// Gets the default root name space.

        /// </summary>

        /// <param name="project">The project.</param>

        /// <returns></returns>

        public static string GetDefaultRootNameSpace(Project project)

        {

            return (string)project.Properties.Item("RootNameSpace").Value;

        }



        /// <summary>

        /// Gets the selected projects.

        /// </summary>

        /// <returns></returns>

        public static IEnumerable<IVsHierarchy> GetSelectedProjects()

        {

            List<IVsHierarchy> list = new List<IVsHierarchy>();

            IntPtr hierarchyPointer = IntPtr.Zero;

            uint itemCount = 0;

            IntPtr ppSC = IntPtr.Zero;

            int singleItemPointer = 0;

            IVsMultiItemSelect multiSelect = null;

            try

            {

                IVsMonitorSelection monitorSelection = (IVsMonitorSelection)Microsoft.VisualStudio.Shell.Package.GetGlobalService(typeof(SVsShellMonitorSelection));

                ErrorHandler.ThrowOnFailure(monitorSelection.GetCurrentSelection(

                    out hierarchyPointer, out itemCount, out multiSelect, out ppSC));

                if (hierarchyPointer != IntPtr.Zero)

                {

                    IVsHierarchy hierarchy = (IVsHierarchy)Marshal.GetObjectForIUnknown(hierarchyPointer);

                    list.Add(hierarchy);

                }

                else if (multiSelect != null)

                {

                    ErrorHandler.ThrowOnFailure(multiSelect.GetSelectionInfo(out itemCount, out singleItemPointer));

                    VSITEMSELECTION[] items = new VSITEMSELECTION[itemCount];

                    ErrorHandler.ThrowOnFailure(multiSelect.GetSelectedItems(0, itemCount, items));

                    list.AddRange(items.Select(item => item.pHier));

                }

                return list;

            }

            finally

            {

                if (hierarchyPointer != IntPtr.Zero)

                {

                    Marshal.Release(hierarchyPointer);

                }

                if (ppSC != IntPtr.Zero)

                {

                    Marshal.Release(ppSC);

                }

            }

        }



        /// <summary>

        /// Determines whether [is share point project] [the specified project].

        /// </summary>

        /// <param name="project">The project.</param>

        /// <returns>

        /// 	<c>true</c> if [is share point project] [the specified project]; otherwise, <c>false</c>.

        /// </returns>

        public static bool IsSharePointProject(EnvDTE.Project project)

        {

            return IsSharePointProject(project, false);

        }



        /// <summary>

        /// Determines whether [is share point project] [the specified project].

        /// </summary>

        /// <param name="project">The project.</param>

        /// <param name="requireFarm">if set to <c>true</c> [require farm].</param>

        /// <returns>

        /// 	<c>true</c> if [is share point project] [the specified project]; otherwise, <c>false</c>.

        /// </returns>

        public static bool IsSharePointProject(EnvDTE.Project project, bool requireFarm)

        {

            // Convert the DTE project into a SharePoint project. If the conversion fails, this is not a SP project.

            ISharePointProject p = ProjectService.Convert<EnvDTE.Project, Microsoft.VisualStudio.SharePoint.ISharePointProject>(project);

            if (p != null && requireFarm)

            {

                return !p.IsSandboxedSolution;

            }

            else

            {

                return p != null;

            }

        }



        /// <summary>

        /// Determines whether [is share point project] [the specified h].

        /// </summary>

        /// <param name="h">The h.</param>

        /// <returns>

        /// 	<c>true</c> if [is share point project] [the specified h]; otherwise, <c>false</c>.

        /// </returns>

        public static bool IsSharePointProject(IVsHierarchy h)

        {

            IVsAggregatableProject project = h as IVsAggregatableProject;

            if (project != null)

            {

                string guidString = null;

                project.GetAggregateProjectTypeGuids(out guidString);

                IEnumerable<Guid> guids = guidString.Split(';').Select(s => new Guid(s));

                return guids.Contains(SharePointProjectTypeID);

            }

            return false;

        }



        /// <summary>

        /// Creates the new file.

        /// </summary>

        /// <param name="fileType">Type of the file.</param>

        /// <param name="title">The title.</param>

        /// <param name="fileContents">The file contents.</param>

        public static void CreateNewFile(

            string fileType, string title, string fileContents)

        {

            Document file = DTE.ItemOperations.NewFile(fileType, title).Document;

            TextSelection selection = file.Selection;

            selection.SelectAll();

            selection.Text = "";

            selection.Insert(fileContents);

            selection.StartOfDocument();

        }



        /// <summary>

        /// Creates the new text file.

        /// </summary>

        /// <param name="title">The title.</param>

        /// <param name="fileContents">The file contents.</param>

        public static void CreateNewTextFile(string title, string fileContents)

        {

            CreateNewFile(@"General\Text File", title, fileContents);

        }



        /// <summary>

        /// Finds the name of the item by.

        /// </summary>

        /// <param name="collection">The collection.</param>

        /// <param name="name">The name.</param>

        /// <param name="recursive">if set to <c>true</c> [recursive].</param>

        /// <returns>The project item.</returns>

        public static ProjectItem FindItemByName(ProjectItems collection, string name, bool recursive)

        {

            if (collection != null)

            {

                foreach (ProjectItem item in collection)

                {

                    if (item.Name.Equals(name, StringComparison.InvariantCultureIgnoreCase))

                    {

                        return item;

                    }

                    if (recursive)

                    {

                        ProjectItem item2 = FindItemByName(item.ProjectItems, name, recursive);

                        if (item2 != null)

                        {

                            return item2;

                        }

                    }

                }

            }

            return null;

        }



        /// <summary>

        /// Gets the name of the project by.

        /// </summary>

        /// <param name="projectName">Name of the project.</param>

        /// <param name="isUniqueName">if set to <c>true</c> [is unique name].</param>

        /// <returns></returns>

        public static Project GetProjectByName(String projectName, bool isUniqueName = true)

        {

            Project result = null;

            foreach (Project project in DTEManager.DTE.Solution.Projects)

            {

                if (((isUniqueName) && (project.UniqueName == projectName)) || ((!isUniqueName) && (project.Name == projectName)))

                {

                    result = project;

                    break;

                }

            }

            return result;

        }



        /// <summary>

        /// Safes the delete project item.

        /// </summary>

        /// <param name="projectItem">The project item.</param>

        public static void SafeDeleteProjectItem(ProjectItem projectItem)

        {

            if (projectItem != null)

            {

                projectItem.Delete();

            }

        }



        /// <summary>

        /// Finds the name of the SPI item by.

        /// </summary>

        /// <param name="spiName">Name of the spi.</param>

        /// <param name="project">The project.</param>

        /// <returns></returns>

        public static ISharePointProjectItem FindSPIItemByName(string spiName, ISharePointProject project)

        {

            return (from ISharePointProjectItem spi

                    in project.ProjectItems

                    where spi.Name == spiName

                    select spi).FirstOrDefault();

        }



        /// <summary>

        /// Tries the get setting.

        /// </summary>

        /// <typeparam name="T"></typeparam>

        /// <param name="settingName">Name of the setting.</param>

        /// <param name="category">The category.</param>

        /// <param name="page">The page.</param>

        /// <param name="value">The value.</param>

        /// <returns></returns>

        public static bool TryGetSetting<T>(string settingName, string category, string page, out T value)

        {

            bool result = false;



            value = default(T);



            DTE dte = DTEManager.DTE;

            if (dte != null)

            {

                EnvDTE.Properties properties = dte.get_Properties(category, page);

                if (properties != null)

                {

                    value = (T)properties.Item(settingName).Value;

                    result = true;

                }

            }



            return result;

        }



        /// <summary>

        /// Set the status of the status bar.

        /// </summary>

        /// <param name="message">The message to display.</param>

        public static void SetStatus(string message)

        {

            DTEManager.DTE.StatusBar.Text = message;

        }

    }

}