/// Copyright (c) Microsoft Corporation.  All rights reserved.

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Shell.Interop;

namespace Microsoft.VisualStudio.Project.Automation
{
	[ComVisible(true), CLSCompliant(false)]
	public class OAProjectItem<T> : EnvDTE.ProjectItem
		 where T : HierarchyNode
	{

		#region fields
		private T node;
		private OAProject project;
		#endregion

		#region properties
		protected T Node
		{
			get
			{
				return this.node;
			}
		}

		/// <summary>
		/// Returns the automation project
		/// </summary>
		protected OAProject Project
		{
			get
			{
				return this.project;
			}
		}
		#endregion

		#region ctors
		public OAProjectItem(OAProject project, T node)
		{
			this.node = node;
			this.project = project;
		}
		#endregion

		#region EnvDTE.ProjectItem

		/// <summary>
		/// Gets the requested Extender if it is available for this object
		/// </summary>
		/// <param name="extenderName">The name of the extender.</param>
		/// <returns>The extender object.</returns>
		public virtual object get_Extender(string extenderName)
		{
			return null;
		}

		/// <summary>
		/// Gets an object that can be accessed by name at run time.
		/// </summary>
		public virtual object Object
		{
			get
			{
				return this.node.Object;
			}
		}

		/// <summary>
		/// Gets the Document associated with the item, if one exists.
		/// </summary>
		public virtual EnvDTE.Document Document
		{
			get
			{
				return null;
			}
		}

		/// <summary>
		/// Gets the number of files associated with a ProjectItem.
		/// </summary>
		public virtual short FileCount
		{
			get
			{
				return (short)1;
			}
		}

		/// <summary>
		/// Gets a collection of all properties that pertain to the object. 
		/// </summary>
		public virtual EnvDTE.Properties Properties
		{
			get
			{
				if(this.node.NodeProperties == null)
				{
					return null;
				}
				return new OAProperties(this.node.NodeProperties);
			}
		}


		/// <summary>
		/// Gets the FileCodeModel object for the project item.
		/// </summary>
		public virtual EnvDTE.FileCodeModel FileCodeModel
		{
			get
			{
				return null;
			}
		}

		/// <summary>
		/// Gets a ProjectItems for the object.
		/// </summary>
		public virtual EnvDTE.ProjectItems ProjectItems
		{
			get
			{
				return null;
			}
		}

		/// <summary>
		/// Gets a GUID string indicating the kind or type of the object.
		/// </summary>
		public virtual string Kind
		{
			get
			{
				Guid guid;
				ErrorHandler.ThrowOnFailure(this.node.GetGuidProperty((int)__VSHPROPID.VSHPROPID_TypeGuid, out guid));
				return guid.ToString("B");
			}
		}

		/// <summary>
		/// Saves the project item. 
		/// </summary>
		/// <param name="fileName">The name with which to save the project or project item.</param>
		/// <remarks>Implemented by subclasses.</remarks>
		public virtual void Save(string fileName)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Gets the top-level extensibility object.
		/// </summary>
		public virtual EnvDTE.DTE DTE
		{
			get
			{
				return (EnvDTE.DTE)this.project.DTE;
			}
		}

		/// <summary>
		/// Gets the ProjectItems collection containing the ProjectItem object supporting this property.
		/// </summary>
		public virtual EnvDTE.ProjectItems Collection
		{
			get
			{
				// Get the parent node
				HierarchyNode parentNode = this.node.Parent;
				Debug.Assert(parentNode != null, "Failed to get the parent node");

				// Get the ProjectItems object for the parent node
				if(parentNode is ProjectNode)
				{
					// The root node for the project
					return ((OAProject)parentNode.GetAutomationObject()).ProjectItems;
				}
				else if(parentNode is FileNode && parentNode.FirstChild != null)
				{
					// The item has children
					return ((OAProjectItem<FileNode>)parentNode.GetAutomationObject()).ProjectItems;
				}
				else if(parentNode is FolderNode)
				{
					return ((OAProjectItem<FolderNode>)parentNode.GetAutomationObject()).ProjectItems;
				}
				else
				{
					// Not supported. Override this method in derived classes to return appropriate collection object
					throw new NotImplementedException();
				}
			}
		}
		/// <summary>
		/// Gets a list of available Extenders for the object.
		/// </summary>
		public virtual object ExtenderNames
		{
			get
			{
				return null;
			}
		}

		/// <summary>
		/// Gets the ConfigurationManager object for this ProjectItem. 
		/// </summary>
		/// <remarks>We do not support config management based per item.</remarks>
		public virtual EnvDTE.ConfigurationManager ConfigurationManager
		{
			get
			{
				return null;
			}
		}

		/// <summary>
		/// Gets the project hosting the ProjectItem.
		/// </summary>
		public virtual EnvDTE.Project ContainingProject
		{
			get
			{
				return this.project;
			}
		}

		/// <summary>
		/// Gets or sets a value indicating whether or not the object has been modified since last being saved or opened.
		/// </summary>
		public virtual bool Saved
		{
			get
			{
				return !this.IsDirty;

			}
			set
			{
				throw new NotImplementedException();
			}
		}

		/// <summary>
		/// Gets the Extender category ID (CATID) for the object.
		/// </summary>
		public virtual string ExtenderCATID
		{
			get
			{
				return null;
			}
		}

		/// <summary>
		/// If the project item is the root of a subproject, then the SubProject property returns the Project object for the subproject.
		/// </summary>
		public virtual EnvDTE.Project SubProject
		{
			get
			{
				return null;
			}
		}

		/// <summary>
		/// Microsoft Internal Use Only. Checks if the document associated to this item is dirty.
		/// </summary>
		public virtual bool IsDirty
		{
			get
			{
				throw new NotImplementedException();
			}
			set
			{
				throw new NotImplementedException();
			}
		}

		/// <summary>
		/// Gets or sets the name of the object.
		/// </summary>
		public virtual string Name
		{
			get
			{
				return this.node.Caption;
			}
			set
			{
				if(this.node == null || this.node.ProjectMgr == null || this.node.ProjectMgr.IsClosed || this.node.ProjectMgr.Site == null)
				{
					throw new InvalidOperationException();
				}

				using(AutomationScope scope = new AutomationScope(this.Node.ProjectMgr.Site))
				{
					this.node.SetEditLabel(value);
				}
			}
		}
		/// <summary>
		/// Removes the project item from hierarchy.
		/// </summary>
		public virtual void Remove()
		{
			if(this.node == null || this.node.ProjectMgr == null || this.node.ProjectMgr.IsClosed || this.node.ProjectMgr.Site == null)
			{
				throw new InvalidOperationException();
			}

			using(AutomationScope scope = new AutomationScope(this.Node.ProjectMgr.Site))
			{
				this.node.Remove(false);
			}
		}

		/// <summary>
		/// Removes the item from its project and its storage. 
		/// </summary>
		public virtual void Delete()
		{
			if(this.node == null || this.node.ProjectMgr == null || this.node.ProjectMgr.IsClosed || this.node.ProjectMgr.Site == null)
			{
				throw new InvalidOperationException();
			}

			using(AutomationScope scope = new AutomationScope(this.Node.ProjectMgr.Site))
			{
				this.node.Remove(true);
			}
		}

		/// <summary>
		/// Saves the project item.
		/// </summary>
		/// <param name="newFileName">The file name with which to save the solution, project, or project item. If the file exists, it is overwritten.</param>
		/// <returns>true if save was successful</returns>
		/// <remarks>This method is implemented on subclasses.</remarks>
		public virtual bool SaveAs(string newFileName)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Gets a value indicating whether the project item is open in a particular view type. 
		/// </summary>
		/// <param name="viewKind">A Constants.vsViewKind* indicating the type of view to check./param>
		/// <returns>A Boolean value indicating true if the project is open in the given view type; false if not. </returns>
		public virtual bool get_IsOpen(string viewKind)
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// Gets the full path and names of the files associated with a project item.
		/// </summary>
		/// <param name="index"> The index of the item</param>
		/// <returns>The full path of the associated item</returns>
		/// <exception cref="ArgumentOutOfRangeException">Is thrown if index is not one</exception>
		public virtual string get_FileNames(short index)
		{
			// This method should really only be called with 1 as the parameter, but
			// there used to be a bug in VB/C# that would work with 0. To avoid breaking
			// existing automation they are still accepting 0. To be compatible with them
			// we accept it as well.
			Debug.Assert(index > 0, "Index is 1 based.");
			if(index < 0)
			{
				throw new ArgumentOutOfRangeException("index");
			}
			return this.node.Url;
		}

		/// <summary>
		/// Expands the view of Solution Explorer to show project items. 
		/// </summary>
		public virtual void ExpandView()
		{
			if(this.node == null || this.node.ProjectMgr == null || this.node.ProjectMgr.IsClosed || this.node.ProjectMgr.Site == null)
			{
				throw new InvalidOperationException();
			}

			using(AutomationScope scope = new AutomationScope(this.Node.ProjectMgr.Site))
			{
				IVsUIHierarchyWindow uiHierarchy = UIHierarchyUtilities.GetUIHierarchyWindow(this.node.ProjectMgr.Site, HierarchyNode.SolutionExplorer);
				if(uiHierarchy == null)
				{
					throw new InvalidOperationException();
				}

				ErrorHandler.ThrowOnFailure(uiHierarchy.ExpandItem(this.node.ProjectMgr, this.node.ID, EXPANDFLAGS.EXPF_ExpandFolder));

			}
		}

		/// <summary>
		/// Opens the project item in the specified view. Not implemented because this abstract class dont know what to open
		/// </summary>
		/// <param name="ViewKind">Specifies the view kind in which to open the item</param>
		/// <returns>Window object</returns>
		public virtual EnvDTE.Window Open(string ViewKind)
		{
			throw new NotImplementedException();
		}

		#endregion
	}
}