using System;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Diagnostics;
using System.Threading;

using Path = System.IO.Path;
using Directory = System.IO.Directory;
using Image = System.Drawing.Image;
using Assembly = System.Reflection.Assembly;
using XmlException = System.Xml.XmlException;
using FileNotFoundException = System.IO.FileNotFoundException;

namespace ProcessInfo
{
	public class ProcessInfoForm : Form
	{
		private String programDirectory;

		private Settings settings;
		private Throbber throbber;

		private System.Windows.Forms.ToolBar toolBar;
		private System.Windows.Forms.ToolBarButton refreshToolBarButton;
		private System.Windows.Forms.ToolBarButton showBrowserToolBarButton;
		private System.Windows.Forms.ComboBox sitesComboBox;
		private System.ComponentModel.IContainer components;
		private System.Windows.Forms.Splitter splitter;
		private System.Windows.Forms.Label sitesLabel;
		private ProcessListView processListView;
		private AxSHDocVw.AxWebBrowser browser;
		private System.Windows.Forms.ImageList toolbarImageList;

		public ProcessInfoForm()
		{
			InitializeComponent();
		}

		[STAThread]
		static void Main() 
		{
			try
			{
				Application.Run( new ProcessInfoForm() );
			}
			catch ( Exception e )
			{
			 	MessageBox.Show( e.Message, "Fatal error", MessageBoxButtons.OK, MessageBoxIcon.Stop );
			}
		}

		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(ProcessInfoForm));
			this.toolBar = new System.Windows.Forms.ToolBar();
			this.refreshToolBarButton = new System.Windows.Forms.ToolBarButton();
			this.showBrowserToolBarButton = new System.Windows.Forms.ToolBarButton();
			this.toolbarImageList = new System.Windows.Forms.ImageList(this.components);
			this.sitesComboBox = new System.Windows.Forms.ComboBox();
			this.sitesLabel = new System.Windows.Forms.Label();
			this.throbber = new ProcessInfo.Throbber();
			this.processListView = new ProcessInfo.ProcessListView();
			this.splitter = new System.Windows.Forms.Splitter();
			this.browser = new AxSHDocVw.AxWebBrowser();
			((System.ComponentModel.ISupportInitialize)(this.browser)).BeginInit();
			this.SuspendLayout();
			// 
			// toolBar
			// 
			this.toolBar.Appearance = System.Windows.Forms.ToolBarAppearance.Flat;
			this.toolBar.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
																					   this.refreshToolBarButton,
																					   this.showBrowserToolBarButton});
			this.toolBar.DropDownArrows = true;
			this.toolBar.ImageList = this.toolbarImageList;
			this.toolBar.Location = new System.Drawing.Point(0, 0);
			this.toolBar.Name = "toolBar";
			this.toolBar.ShowToolTips = true;
			this.toolBar.Size = new System.Drawing.Size(816, 28);
			this.toolBar.TabIndex = 0;
			this.toolBar.TextAlign = System.Windows.Forms.ToolBarTextAlign.Right;
			this.toolBar.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar_ButtonClick);
			// 
			// refreshToolBarButton
			// 
			this.refreshToolBarButton.ImageIndex = 0;
			this.refreshToolBarButton.Text = " Refresh Processes";
			// 
			// showBrowserToolBarButton
			// 
			this.showBrowserToolBarButton.ImageIndex = 1;
			this.showBrowserToolBarButton.Pushed = true;
			this.showBrowserToolBarButton.Style = System.Windows.Forms.ToolBarButtonStyle.ToggleButton;
			this.showBrowserToolBarButton.Text = " Show Info";
			// 
			// toolbarImageList
			// 
			this.toolbarImageList.ImageSize = new System.Drawing.Size(16, 16);
			this.toolbarImageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("toolbarImageList.ImageStream")));
			this.toolbarImageList.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// sitesComboBox
			// 
			this.sitesComboBox.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.sitesComboBox.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.sitesComboBox.ItemHeight = 13;
			this.sitesComboBox.Location = new System.Drawing.Point(276, 2);
			this.sitesComboBox.Name = "sitesComboBox";
			this.sitesComboBox.Size = new System.Drawing.Size(220, 21);
			this.sitesComboBox.Sorted = true;
			this.sitesComboBox.TabIndex = 0;
			this.sitesComboBox.SelectedIndexChanged += new System.EventHandler(this.sitesComboBox_SelectedIndexChanged);
			// 
			// sitesLabel
			// 
			this.sitesLabel.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
			this.sitesLabel.Location = new System.Drawing.Point(224, 6);
			this.sitesLabel.Name = "sitesLabel";
			this.sitesLabel.Size = new System.Drawing.Size(52, 16);
			this.sitesLabel.TabIndex = 4;
			this.sitesLabel.Text = "Info Site:";
			// 
			// throbber
			// 
			this.throbber.Location = new System.Drawing.Point(0, 0);
			this.throbber.Name = "throbber";
			this.throbber.Size = new System.Drawing.Size(16, 16);
			this.throbber.StoppedImage = ((System.Drawing.Image)(resources.GetObject("throbber.StoppedImage")));
			this.throbber.TabIndex = 0;
			this.throbber.Throbbing = false;
			this.throbber.ThrobImage = ((System.Drawing.Image)(resources.GetObject("throbber.ThrobImage")));
			// 
			// processListView
			// 
			this.processListView.Dock = System.Windows.Forms.DockStyle.Left;
			this.processListView.FullRowSelect = true;
			this.processListView.HideSelection = false;
			this.processListView.Location = new System.Drawing.Point(0, 28);
			this.processListView.MultiSelect = false;
			this.processListView.Name = "processListView";
			this.processListView.Size = new System.Drawing.Size(392, 498);
			this.processListView.TabIndex = 9;
			this.processListView.View = System.Windows.Forms.View.Details;
			this.processListView.SelectedIndexChanged += new System.EventHandler(this.processListView_SelectedIndexChanged);
			// 
			// splitter
			// 
			this.splitter.Location = new System.Drawing.Point(392, 28);
			this.splitter.Name = "splitter";
			this.splitter.Size = new System.Drawing.Size(3, 498);
			this.splitter.TabIndex = 10;
			this.splitter.TabStop = false;
			// 
			// browser
			// 
			this.browser.Dock = System.Windows.Forms.DockStyle.Fill;
			this.browser.Enabled = true;
			this.browser.Location = new System.Drawing.Point(395, 28);
			this.browser.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("browser.OcxState")));
			this.browser.Size = new System.Drawing.Size(421, 498);
			this.browser.TabIndex = 6;
			this.browser.DocumentComplete += new AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEventHandler(this.browser_DocumentComplete);
			this.browser.BeforeNavigate2 += new AxSHDocVw.DWebBrowserEvents2_BeforeNavigate2EventHandler(this.browser_BeforeNavigate2);
			// 
			// ProcessInfoForm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(816, 526);
			this.Controls.Add(this.throbber);
			this.Controls.Add(this.browser);
			this.Controls.Add(this.splitter);
			this.Controls.Add(this.processListView);
			this.Controls.Add(this.sitesLabel);
			this.Controls.Add(this.sitesComboBox);
			this.Controls.Add(this.toolBar);
			this.Name = "ProcessInfoForm";
			this.Text = "ProcessInfo";
			this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
			this.Resize += new System.EventHandler(this.ProcessInfoForm_Resize);
			this.Load += new System.EventHandler(this.ProcessInfoForm_Load);
			((System.ComponentModel.ISupportInitialize)(this.browser)).EndInit();
			this.ResumeLayout(false);

		}

		private void ProcessInfoForm_Resize(object sender, System.EventArgs e )
		{
			throbber.Top = 6;
			throbber.Left = (int)Math.Max( sitesComboBox.Right + 10, this.ClientSize.Width - 6 - throbber.Width );
		}

		private void ProcessInfoForm_Load(object sender, System.EventArgs e)
		{
			programDirectory = Path.GetDirectoryName( Assembly.GetExecutingAssembly().Location );
			LoadSettings();
			LoadSites();
			browser.Navigate( "about:blank" );
			RefreshProcesses();
		}

		private void LoadSettings()
		{
			try
			{
				settings = Settings.Load( Path.Combine( programDirectory, "settings.xml" ) );
			}
			catch ( FileNotFoundException )
			{
				settings = new Settings();
			}
			catch ( XmlException e )
			{
				ShowSettingsFileErrorMessageBox( e.Message );
				settings = new Settings();
			}
			catch ( InvalidOperationException e )
			{
				ShowSettingsFileErrorMessageBox( e.Message );
				settings = new Settings();
			}
		}

		private void ShowSettingsFileErrorMessageBox( String message )
		{
			MessageBox.Show( this, message, "Settings file error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation );
		}

		private void LoadSites()
		{
			foreach( Site site in settings.Sites )
			{
				sitesComboBox.Items.Add( site );

				if ( site.Selected )
				{
					sitesComboBox.SelectedItem = site;
				}
			}

			if ( sitesComboBox.Items.Count == 0 )
			{
				sitesComboBox.Enabled = false;
				sitesComboBox.Items.Add( "Define a site in settings.xml" );
			}

			if ( sitesComboBox.SelectedItem == null )
			{
				sitesComboBox.SelectedIndex = 0;
			}
		}

        // must be called on UI thread
		private void RefreshProcesses()
		{
			refreshToolBarButton.Enabled = false;
			throbber.Throbbing = true;
			MethodInvoker refreshProcesses = new MethodInvoker( processListView.RefreshProcesses );
			refreshProcesses.BeginInvoke( new AsyncCallback( RefreshProcessesDone ), null );
		}

        // may be called on non-UI thread
		private void RefreshProcessesDone( IAsyncResult result )
		{
            if ( this.toolBar.InvokeRequired )
            {
                this.toolBar.Invoke( new MethodInvoker( this.EnableRefreshButtonAndStopThrobber ) );
            }
		}

        // must be called on UI thread
        private void EnableRefreshButtonAndStopThrobber()
        {
            refreshToolBarButton.Enabled = true;
            throbber.Throbbing = false;
        }

		private void ShowWebPage()
		{
			if ( ( processListView.SelectedItems.Count <= 0 )
				|| ( settings.Sites.Length == 0 )
				|| ( sitesComboBox.SelectedItem == null ) )
			{
				return;
			}

			ProcessListViewItem selectedItem = (ProcessListViewItem)processListView.SelectedItems[ 0 ];
			Process process = selectedItem.Process;
			Site site = (Site)sitesComboBox.SelectedItem;
			
			Object dummy = new Object();
			browser.Navigate( site.GetUrl( process ), ref dummy, ref dummy, ref dummy, ref dummy );
		}

		private void toolBar_ButtonClick( object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e )
		{
			if ( e.Button.Equals( refreshToolBarButton ) )
			{
				refreshToolBarButton_Click( e );
			}
			else if ( e.Button.Equals( showBrowserToolBarButton ) )
			{
				showBrowserToolBarButton_Click( e );
			}
		}

		private void refreshToolBarButton_Click( ToolBarButtonClickEventArgs e )
		{
			RefreshProcesses();
		}

		private void showBrowserToolBarButton_Click( ToolBarButtonClickEventArgs e )
		{
			if ( e.Button.Pushed )
			{
				browser.Visible = true;
				splitter.Visible = true;
				processListView.Dock = DockStyle.Left;
			}
			else
			{
				browser.Visible = false;
				splitter.Visible = false;
				processListView.Dock = DockStyle.Fill;
			}
		}

		private void processListView_SelectedIndexChanged( Object sender, System.EventArgs e )
		{
			ShowWebPage();
		}

		private void sitesComboBox_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			ShowWebPage();
		}

		private void browser_BeforeNavigate2(object sender, AxSHDocVw.DWebBrowserEvents2_BeforeNavigate2Event e)
		{
			throbber.Throbbing = true;
		}

		// if the browse doesn't reach readycomplete state the throbber will keep throbbing
		private void browser_DocumentComplete(object sender, AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEvent e)
		{
			if ( browser.ReadyState == SHDocVw.tagREADYSTATE.READYSTATE_COMPLETE )
			{
				throbber.Throbbing = false;
			}
		}
	}
}