using System;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using ACorns.Hawkeye.Plugins;

using ACorns.Hawkeye.Core.Utils;

using ACorns.Hawkeye.Core.UI;



namespace ACorns.Hawkeye.Utils

{

	/// <summary>

	/// Summary description for WindowProperties.

	/// </summary>

	internal class WindowProperties : IDisposable

	{

		private static Pen drawPen = new Pen(Brushes.Red, 2);

		private IntPtr detectedWindow = IntPtr.Zero;

		private Point lastPoint = Point.Empty;



		private object selectedObject;



		public IntPtr DetectedWindow

		{

			get { return detectedWindow; }

		}



		public object ActiveObject

		{

			get { return selectedObject; }

		}



		public object ActiveWindow

		{

			get

			{

				if (detectedWindow != IntPtr.Zero)

				{

					return Control.FromHandle(detectedWindow);

				}

				else

				{

					return null;

				}

			}

		}



		public string ClassName

		{

			get

			{

				if (!IsValid)

					return null;

				return NativeUtils.GetClassName(detectedWindow);

			}

		}



		public bool IsManagedByClassName

		{

			get

			{

				string className = ClassName;

				if (className != null && className.StartsWith("WindowsForms10"))

				{

					return true;

				}

				else

				{

					return false;

				}

				//Match match = classNameRegex.Match(ClassName);

				//return match.Success;

			}

		}



		public bool IsValid

		{

			get { return detectedWindow != IntPtr.Zero; }

		}



		public bool IsManaged

		{

			get { return ActiveWindow != null; }

		}



		internal bool SetWindowHandle(IntPtr handle, Point lastPoint)

		{

			Refresh();

			this.lastPoint = lastPoint;

			this.detectedWindow = handle;

			Refresh();

			Highlight();



			bool changed = false;

			object activeWindow = ActiveWindow;

			if ( activeWindow != selectedObject )

			{

				changed = true;

				selectedObject = activeWindow;

			}



			// try to load plugins



			Point checkPoint = lastPoint;

			if ( detectedWindow != IntPtr.Zero )

				checkPoint = NativeUtils.NativeScreenToClient(detectedWindow, lastPoint);



			object lastSelected = detectedWindow;



			if (checkPoint != Point.Empty && PluginManager.Instance.ResolveSelection(checkPoint, lastSelected, ref selectedObject))

			{

				changed = true;

			}

				

			return changed;

		}



		public void Refresh()

		{

			if (!IsValid)

				return;

			IntPtr toUpdate = this.detectedWindow;

			IntPtr parentWindow = NativeUtils.GetParent(toUpdate);

			if (parentWindow != IntPtr.Zero)

			{

				toUpdate = parentWindow; // using parent

			}



			NativeUtils.InvalidateRect(toUpdate, IntPtr.Zero, true);

			NativeUtils.UpdateWindow(toUpdate);

			bool result = NativeUtils.RedrawWindow(toUpdate, IntPtr.Zero, IntPtr.Zero, NativeUtils.RDW.RDW_FRAME | NativeUtils.RDW.RDW_INVALIDATE | NativeUtils.RDW.RDW_UPDATENOW | NativeUtils.RDW.RDW_ERASENOW | NativeUtils.RDW.RDW_ALLCHILDREN);

		}



		public void Highlight()

		{

			IntPtr windowDC;

			RECT windowRect = new RECT(0, 0, 0, 0);

			NativeUtils.GetWindowRect(detectedWindow, ref windowRect);



			IntPtr parentWindow = NativeUtils.GetParent(detectedWindow);

			windowDC = NativeUtils.GetWindowDC(detectedWindow);

			if (windowDC != IntPtr.Zero)

			{

				Graphics graph = Graphics.FromHdc(windowDC, detectedWindow);

				graph.DrawRectangle(drawPen, 1, 1, windowRect.Width - 2, windowRect.Height - 2);

				graph.Dispose();

				NativeUtils.ReleaseDC(detectedWindow, windowDC);

			}

		}



		#region IDisposable Members



		public void Dispose()

		{

			Refresh();

		}



		#endregion

	}

}