#region Disclaimer / License
// Copyright (C) 2006, Kenneth Skovhede
// http://www.hexad.dk, opensource@hexad.dk
// 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
// 
#endregion
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace OSGeo.MapGuide.Maestro
{
	/// <summary>
	/// Summary description for LengthyOperation.
	/// </summary>
	public class LengthyOperation : System.Windows.Forms.Form
	{
		public enum OperationType : int
		{
			MoveResource,
			MoveFolder,
			CopyFolder,
			Other,
		}

		private enum ProgressState
		{
			InitialOperation,
			ReferenceOperation,
			UpdateOperation
		}

		private System.Windows.Forms.Panel panel1;
		private System.Windows.Forms.Button OKBtn;
		private System.Windows.Forms.Button CancelBtn;
		private System.Windows.Forms.Panel panel2;
		private System.Windows.Forms.Panel ProgressPanel;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.ImageList progressImages;
		private System.Windows.Forms.Timer animationTimer;
		private System.ComponentModel.IContainer components;

		private System.Threading.Thread m_runner = null;
		private OSGeo.MapGuide.MaestroAPI.ServerConnectionI m_connection;
		private System.Reflection.MethodInfo m_callbackEnabledMethod;
		private object[] m_arguments;

		private ListViewItem m_currentItem = null;
		private System.Windows.Forms.ListView workList;
		private System.Windows.Forms.Label OperationDescription;

		private System.Threading.ManualResetEvent m_event;
		private System.Windows.Forms.ColumnHeader columnHeader1;
        
		private System.Windows.Forms.ProgressBar ProgressBar;
		private bool m_cancel = false;
		private System.Windows.Forms.Timer MarqueeTimer;
		private OperationType m_operation;

		private ProgressState m_state = ProgressState.InitialOperation;

		private bool m_cancelRequested = false;
		private bool m_waitingForUser = true;
		private Globalizator.Globalizator m_globalizor = null;
		private object m_callbackobject = null;
		private bool m_noCancelConfirmation = false;

		public LengthyOperation()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
			m_globalizor = new  Globalizator.Globalizator(this);
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(LengthyOperation));
			this.workList = new System.Windows.Forms.ListView();
			this.columnHeader1 = new System.Windows.Forms.ColumnHeader();
			this.progressImages = new System.Windows.Forms.ImageList(this.components);
			this.OperationDescription = new System.Windows.Forms.Label();
			this.panel1 = new System.Windows.Forms.Panel();
			this.CancelBtn = new System.Windows.Forms.Button();
			this.OKBtn = new System.Windows.Forms.Button();
			this.panel2 = new System.Windows.Forms.Panel();
			this.ProgressPanel = new System.Windows.Forms.Panel();
			this.label2 = new System.Windows.Forms.Label();
			this.ProgressBar = new System.Windows.Forms.ProgressBar();
			this.animationTimer = new System.Windows.Forms.Timer(this.components);
			this.MarqueeTimer = new System.Windows.Forms.Timer(this.components);
			this.panel1.SuspendLayout();
			this.panel2.SuspendLayout();
			this.ProgressPanel.SuspendLayout();
			this.SuspendLayout();
			// 
			// workList
			// 
			this.workList.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
																					   this.columnHeader1});
			this.workList.Dock = System.Windows.Forms.DockStyle.Fill;
			this.workList.FullRowSelect = true;
			this.workList.HeaderStyle = System.Windows.Forms.ColumnHeaderStyle.None;
			this.workList.Location = new System.Drawing.Point(0, 32);
			this.workList.Name = "workList";
			this.workList.Size = new System.Drawing.Size(472, 0);
			this.workList.SmallImageList = this.progressImages;
			this.workList.TabIndex = 0;
			this.workList.View = System.Windows.Forms.View.Details;
			this.workList.Resize += new System.EventHandler(this.workList_Resize);
			// 
			// progressImages
			// 
			this.progressImages.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
			this.progressImages.ImageSize = new System.Drawing.Size(16, 16);
			this.progressImages.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("progressImages.ImageStream")));
			this.progressImages.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// OperationDescription
			// 
			this.OperationDescription.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
				| System.Windows.Forms.AnchorStyles.Right)));
			this.OperationDescription.Location = new System.Drawing.Point(8, 8);
			this.OperationDescription.Name = "OperationDescription";
			this.OperationDescription.Size = new System.Drawing.Size(456, 16);
			this.OperationDescription.TabIndex = 1;
			this.OperationDescription.Text = "The operation you have initiated requires that the resources listed below, gets u" +
				"pdated";
			// 
			// panel1
			// 
			this.panel1.Controls.Add(this.CancelBtn);
			this.panel1.Controls.Add(this.OKBtn);
			this.panel1.Dock = System.Windows.Forms.DockStyle.Bottom;
			this.panel1.Location = new System.Drawing.Point(0, 64);
			this.panel1.Name = "panel1";
			this.panel1.Size = new System.Drawing.Size(472, 40);
			this.panel1.TabIndex = 2;
			// 
			// CancelBtn
			// 
			this.CancelBtn.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
			this.CancelBtn.Enabled = false;
			this.CancelBtn.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.CancelBtn.Location = new System.Drawing.Point(252, 8);
			this.CancelBtn.Name = "CancelBtn";
			this.CancelBtn.Size = new System.Drawing.Size(96, 24);
			this.CancelBtn.TabIndex = 1;
			this.CancelBtn.Text = "Cancel";
			this.CancelBtn.Click += new System.EventHandler(this.CancelBtn_Click);
			// 
			// OKBtn
			// 
			this.OKBtn.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
			this.OKBtn.Enabled = false;
			this.OKBtn.FlatStyle = System.Windows.Forms.FlatStyle.System;
			this.OKBtn.Location = new System.Drawing.Point(140, 8);
			this.OKBtn.Name = "OKBtn";
			this.OKBtn.Size = new System.Drawing.Size(96, 24);
			this.OKBtn.TabIndex = 0;
			this.OKBtn.Text = "OK";
			this.OKBtn.Click += new System.EventHandler(this.OKBtn_Click);
			// 
			// panel2
			// 
			this.panel2.Controls.Add(this.OperationDescription);
			this.panel2.Dock = System.Windows.Forms.DockStyle.Top;
			this.panel2.Location = new System.Drawing.Point(0, 0);
			this.panel2.Name = "panel2";
			this.panel2.Size = new System.Drawing.Size(472, 32);
			this.panel2.TabIndex = 3;
			// 
			// ProgressPanel
			// 
			this.ProgressPanel.Controls.Add(this.label2);
			this.ProgressPanel.Controls.Add(this.ProgressBar);
			this.ProgressPanel.Dock = System.Windows.Forms.DockStyle.Bottom;
			this.ProgressPanel.Location = new System.Drawing.Point(0, 24);
			this.ProgressPanel.Name = "ProgressPanel";
			this.ProgressPanel.Size = new System.Drawing.Size(472, 40);
			this.ProgressPanel.TabIndex = 4;
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(8, 8);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(64, 16);
			this.label2.TabIndex = 1;
			this.label2.Text = "Progress";
			// 
			// ProgressBar
			// 
			this.ProgressBar.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
				| System.Windows.Forms.AnchorStyles.Left) 
				| System.Windows.Forms.AnchorStyles.Right)));
			this.ProgressBar.Location = new System.Drawing.Point(80, 8);
			this.ProgressBar.Name = "ProgressBar";
			this.ProgressBar.Size = new System.Drawing.Size(376, 24);
			this.ProgressBar.TabIndex = 0;
			// 
			// animationTimer
			// 
			this.animationTimer.Interval = 500;
			this.animationTimer.Tick += new System.EventHandler(this.animationTimer_Tick);
			// 
			// MarqueeTimer
			// 
			this.MarqueeTimer.Interval = 500;
			this.MarqueeTimer.Tick += new System.EventHandler(this.MarqueeTimer_Tick);
			// 
			// LengthyOperation
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(472, 104);
			this.Controls.Add(this.workList);
			this.Controls.Add(this.ProgressPanel);
			this.Controls.Add(this.panel2);
			this.Controls.Add(this.panel1);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.SizableToolWindow;
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Name = "LengthyOperation";
			this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Show;
			this.Text = "Confirm operations on related items";
			this.Load += new System.EventHandler(this.LengthyOperation_Load);
			this.panel1.ResumeLayout(false);
			this.panel2.ResumeLayout(false);
			this.ProgressPanel.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		private void animationTimer_Tick(object sender, System.EventArgs e)
		{
			if (m_currentItem == null)
				return;

			if (m_currentItem.ImageIndex < 8 && m_currentItem.ImageIndex >= 0)
				m_currentItem.ImageIndex = (m_currentItem.ImageIndex + 1) % 8;
		}

		public System.Reflection.MethodInfo CallbackEnabledMethod
		{
			get { return m_callbackEnabledMethod; }
			set { m_callbackEnabledMethod = value; }
		}

		public object CallbackObject
		{
			get { return m_callbackobject; }
			set { m_callbackobject = value; }
		}

		public void InitializeDialog(OSGeo.MapGuide.MaestroAPI.ServerConnectionI connection, string argument1, string argument2, OperationType operation)
		{
			m_connection = connection;
			OSGeo.MapGuide.MaestroAPI.LengthyOperationCallBack callback = new OSGeo.MapGuide.MaestroAPI.LengthyOperationCallBack(CallbackMethod);
			OSGeo.MapGuide.MaestroAPI.LengthyOperationProgressCallBack pgcallback = new OSGeo.MapGuide.MaestroAPI.LengthyOperationProgressCallBack(WaitOperationCallBack);
			m_event = new System.Threading.ManualResetEvent(false);
			m_operation = operation;

			switch(operation)
			{
				case OperationType.CopyFolder:
					m_callbackEnabledMethod = typeof(OSGeo.MapGuide.MaestroAPI.ServerConnectionI).GetMethod("CopyFolderWithReferences");
					m_arguments = new object[] { argument1, argument2, callback, pgcallback };
					OperationDescription.Text = m_globalizor.Translate("Copying the selected folder requires the following items to be copied.");
					m_callbackobject = connection;
					break;
				case OperationType.MoveFolder:
					m_callbackEnabledMethod = typeof(OSGeo.MapGuide.MaestroAPI.ServerConnectionI).GetMethod("MoveFolderWithReferences");
					m_arguments = new object[] { argument1, argument2, callback, pgcallback };
					OperationDescription.Text = m_globalizor.Translate("A move or rename of the selected folder requires the following items to be updated.");
					m_callbackobject = connection;
					break;
				case OperationType.MoveResource:
					m_callbackEnabledMethod = typeof(OSGeo.MapGuide.MaestroAPI.ServerConnectionI).GetMethod("MoveResourceWithReferences");
					m_arguments = new object[] { argument1, argument2, callback, pgcallback };
					OperationDescription.Text = m_globalizor.Translate("A move or rename of the selected resource requires the following items to be updated.");
					m_callbackobject = connection;
					break;
				case OperationType.Other:
					this.Text = m_globalizor.Translate("Confirm the list of files to be processed");
					m_arguments = new object[] { argument1, argument2, callback, pgcallback };
					m_noCancelConfirmation = true;
					break;
				default:
					throw new Exception(string.Format(m_globalizor.Translate("Invalid operation: {0}"), operation.ToString()));
			}

			if (m_callbackEnabledMethod == null)
				throw new MissingMethodException(m_globalizor.Translate("The requested method was not found in the API. Most likely, the API has been updated, and the function names changed"));

		}

		private void ThreadRunner()
		{
			bool retry = true;
			while(retry)
			{
				retry = false;
				try
				{
					try
					{
						m_callbackEnabledMethod.Invoke(m_callbackobject, m_arguments);
					}
					catch (System.Reflection.TargetInvocationException tex)
					{
						Exception ex = tex.InnerException;
						switch (MessageBox.Show(string.Format(m_globalizor.Translate("An error occured: {0}.\n Do you want to retry the operation?"), ex.Message), Application.ProductName, MessageBoxButtons.YesNo, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1))
						{
							case DialogResult.No:
								throw;
							case DialogResult.Yes:
								retry = true;
								break;
						}
					}
				}
				catch (Exception ex)
				{
					if (ex.GetType() == typeof(System.Reflection.TargetInvocationException))
						ex = ex.InnerException;
					MessageBox.Show(this, string.Format(m_globalizor.Translate("An error occured while performing the operation: {0}"), ex.Message), Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error);
				}
			}
			this.Invoke(new System.Threading.ThreadStart(CloseDialog));
		}

		private void WaitOperationCallBack(object sender, OSGeo.MapGuide.MaestroAPI.LengthyOperationProgressArgs args)
		{
			if (this.InvokeRequired)
				this.Invoke(new OSGeo.MapGuide.MaestroAPI.LengthyOperationProgressCallBack(WaitOperationCallBack), new object[] { sender, args } );
			else
			{
				OperationDescription.Text = args.StatusMessage;
				if (args.Progress == -1)
				{
					MarqueeTimer.Enabled = true;
				}
				else
				{
					AskCancel();
					args.Cancel |= m_cancel;

					ProgressBar.Value = args.Progress;
					MarqueeTimer.Enabled = false;

					if (args.Progress == 100)
					{
						m_state = (ProgressState)((int)m_state) + 1;
						ProgressBar.Value = 0;

						CancelBtn.Enabled = true;
					}

				}
			}
		}

		private void AskCancel()
		{
			if (m_cancelRequested && !m_cancel) 
				if (m_noCancelConfirmation || MessageBox.Show(this, m_globalizor.Translate("The main part of the operation has already been performed.\nIf you cancel the remainder of this operation, some references may not be updated properly.\nDo you want to cancel the remainder of the operation?"), Application.ProductName, MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question) == DialogResult.Yes)
					m_cancel = true;
			m_cancelRequested = false;
		}


		private void CloseDialog()
		{
			if (m_cancel)
				this.DialogResult = DialogResult.Cancel;
			else
				this.DialogResult = DialogResult.OK;

			this.Close();
		}

		private void CallbackMethod(object sender, OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs args)
		{
			this.Invoke(new UpdateDisplayDelegate(UpdateDisplay), new object[] { args });
			m_event.WaitOne();
			m_waitingForUser = false;

			AskCancel();
			args.Cancel |= m_cancel;
		}

		private delegate void UpdateDisplayDelegate(OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs args);
		private void UpdateDisplay(OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs args)
		{
			if (!m_event.WaitOne(1, true))
			{
				m_waitingForUser = true;

				workList.Items.Clear();
				foreach(OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs.LengthyOperationItem item in args.Items)
					workList.Items.Add(new ListViewItem(item.Itempath, 10));

				switch(m_operation)
				{
					case OperationType.CopyFolder:
						OperationDescription.Text = m_globalizor.Translate("Copying the selected folder requires that the following resources are updated");
						break;
					case OperationType.MoveFolder:
						OperationDescription.Text = m_globalizor.Translate("A move or rename of the selected folder requires the following resources to be updated.");
						break;
					case OperationType.MoveResource:
						OperationDescription.Text = m_globalizor.Translate("A move or rename of the selected resource requires the following resources to be updated.");
						break;
				}

				ProgressBar.Value = 0;
				this.Height = 432;
				ProgressPanel.Visible = false;
				OKBtn.Enabled = true;

				if (workList.Items.Count == 0)
					m_event.Set();
				else
					//Flash it
					this.Focus();
			}
			else
			{
				animationTimer.Enabled = false;
				m_currentItem = workList.Items[args.Index];
				ProgressBar.Value = Math.Min(100, (int)((args.Index / (double)args.Items.Length) * 100));
				switch(args.Items[args.Index].Status)
				{
					case OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs.LengthyOperationItem.OperationStatus.Pending:
						m_currentItem.ImageIndex = 0;
						break;
					case OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs.LengthyOperationItem.OperationStatus.Success:
						m_currentItem.ImageIndex = 8;
						break;
					case OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs.LengthyOperationItem.OperationStatus.Failure:
						m_currentItem.ImageIndex = 9;
						break;
					default: /*OSGeo.MapGuide.MaestroAPI.LengthyOperationCallbackArgs.LengthyOperationItem.OperationStatus.None:*/
						m_currentItem.ImageIndex = 10;
						break;
				}

				if (m_currentItem.ImageIndex == 0)
					animationTimer.Enabled = true;

			}
		}

		private void LengthyOperation_Load(object sender, System.EventArgs e)
		{
			if (m_callbackEnabledMethod == null)
				throw new Exception("Please call the \"InitializeDialog\" method before displaying the dialog");

			m_runner = new System.Threading.Thread(new System.Threading.ThreadStart(ThreadRunner));
			m_runner.IsBackground = true;
			m_runner.Start();
		}

		private void OKBtn_Click(object sender, System.EventArgs e)
		{
			OKBtn.Enabled = false;
			ProgressPanel.Visible = true;
			m_event.Set();
		}

		private void CancelBtn_Click(object sender, System.EventArgs e)
		{
			m_cancelRequested = true;
			if (m_waitingForUser)
			{
				AskCancel();
				if (m_cancel)
					m_event.Set();
			}
		}

		private void MarqueeTimer_Tick(object sender, System.EventArgs e)
		{
			ProgressBar.Value = ProgressBar.Value % (ProgressBar.Maximum + 1);
		}

		private void workList_Resize(object sender, System.EventArgs e)
		{
			workList.Columns[0].Width = workList.Width - 40;
	}
}
}