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

namespace CopyProject
{
	/// <summary>
	/// Simple class which opens a project file, updates the GUIDs
	/// in it, and writes it out to a new name.  Copying a Visual Studio.NET
	/// project file without replacing the GUIDs will cause problems.
	/// Free for any use, author: Steve Tibbett (stevex-code@oakburl.net)
	/// </summary>
	class MainClass
	{
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			MainClass c = new MainClass();
			c.Run(args);
		}

		// Create a new GUID string formatted the usual way.
		string NewGuidString()
		{
			return "{" + System.Guid.NewGuid().ToString().ToUpper() + "}";
		}

		// This is the main entry point for the "object" that runs
		// this program; the Main entry point is static.
		void Run(string[] args)
		{
			if (args.Length < 2)
			{
				Console.WriteLine("Please supply a source and destination file name (*.vcproj).");
				return;
			}

			// Read the source file
			XmlDocument doc = new XmlDocument();
			try
			{
				// Load the existing project file.
				doc.Load(args[0]);
			} 
			catch (Exception ex)
			{
				// Oops
				Console.WriteLine("Exception reading project file:");
				Console.WriteLine(ex.Message);
				return;
			};

			try
			{
				// Replace the ProjectGUID
				XmlNode node = doc.SelectSingleNode("/VisualStudioProject");
				node.Attributes["ProjectGUID"].Value = NewGuidString();

				// Replace the UniqueIdentifier GUIDs in the Filter nodes
				XmlNodeList nodes = doc.SelectNodes("//Filter");
				foreach (XmlNode filterNode in nodes)
				{
					XmlAttribute attr = filterNode.Attributes["UniqueIndentifier"];
					if (attr != null)
					{
						attr.Value = NewGuidString();
					};
				}
			} 
			catch (Exception ex)
			{
				Console.WriteLine("Error updating GUIDs:");
				Console.WriteLine(ex.Message);
				return;
			}

			try
			{
				// Write out the updated project file
				doc.Save(args[1]);
			} 
			catch (Exception ex)
			{
				Console.WriteLine("Error saving output file:");
				Console.WriteLine(ex.Message);
				return;
			};

			Console.WriteLine("Done!");
		}
	}
}