using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;

namespace RegexBuddyActionClientDemo
{
	/// <summary>
	/// Summary description for WinForm1.
	/// </summary>
	public class FormActionDemo : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.TextBox textRegex;
		private System.Windows.Forms.TextBox textReplace;
		private System.Windows.Forms.CheckBox checkDotAll;
		private System.Windows.Forms.CheckBox checkCaseless;
		private System.Windows.Forms.CheckBox checkMultiline;
		private System.Windows.Forms.RadioButton radioMatch;
		private System.Windows.Forms.RadioButton radioReplace;
		private System.Windows.Forms.RadioButton radioSplit;
		private System.Windows.Forms.Label labelLimit;
		private System.Windows.Forms.Button btnInvoke;
		private System.Windows.Forms.NumericUpDown numericLimit;

		public FormActionDemo()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <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.textRegex = new System.Windows.Forms.TextBox();
			this.textReplace = new System.Windows.Forms.TextBox();
			this.checkDotAll = new System.Windows.Forms.CheckBox();
			this.checkCaseless = new System.Windows.Forms.CheckBox();
			this.checkMultiline = new System.Windows.Forms.CheckBox();
			this.radioMatch = new System.Windows.Forms.RadioButton();
			this.radioReplace = new System.Windows.Forms.RadioButton();
			this.radioSplit = new System.Windows.Forms.RadioButton();
			this.labelLimit = new System.Windows.Forms.Label();
			this.btnInvoke = new System.Windows.Forms.Button();
			this.numericLimit = new System.Windows.Forms.NumericUpDown();
			((System.ComponentModel.ISupportInitialize)(this.numericLimit)).BeginInit();
			this.SuspendLayout();
			// 
			// textRegex
			// 
			this.textRegex.Location = new System.Drawing.Point(8, 32);
			this.textRegex.Multiline = true;
			this.textRegex.Name = "textRegex";
			this.textRegex.Size = new System.Drawing.Size(440, 64);
			this.textRegex.TabIndex = 3;
			this.textRegex.Text = "Regular Expression";
			// 
			// textReplace
			// 
			this.textReplace.Location = new System.Drawing.Point(8, 104);
			this.textReplace.Multiline = true;
			this.textReplace.Name = "textReplace";
			this.textReplace.Size = new System.Drawing.Size(440, 64);
			this.textReplace.TabIndex = 4;
			this.textReplace.Text = "Replacement Text";
			// 
			// checkDotAll
			// 
			this.checkDotAll.Location = new System.Drawing.Point(8, 176);
			this.checkDotAll.Name = "checkDotAll";
			this.checkDotAll.Size = new System.Drawing.Size(128, 24);
			this.checkDotAll.TabIndex = 5;
			this.checkDotAll.Text = "Dot matches newline";
			// 
			// checkCaseless
			// 
			this.checkCaseless.Location = new System.Drawing.Point(152, 176);
			this.checkCaseless.Name = "checkCaseless";
			this.checkCaseless.Size = new System.Drawing.Size(120, 24);
			this.checkCaseless.TabIndex = 6;
			this.checkCaseless.Text = "Case insensitive";
			// 
			// checkMultiline
			// 
			this.checkMultiline.Location = new System.Drawing.Point(280, 176);
			this.checkMultiline.Name = "checkMultiline";
			this.checkMultiline.Size = new System.Drawing.Size(168, 24);
			this.checkMultiline.TabIndex = 7;
			this.checkMultiline.Text = "^ and $ match at line breaks";
			// 
			// radioMatch
			// 
			this.radioMatch.Checked = true;
			this.radioMatch.Location = new System.Drawing.Point(8, 8);
			this.radioMatch.Name = "radioMatch";
			this.radioMatch.TabIndex = 0;
			this.radioMatch.TabStop = true;
			this.radioMatch.Text = "Match";
			// 
			// radioReplace
			// 
			this.radioReplace.Location = new System.Drawing.Point(120, 8);
			this.radioReplace.Name = "radioReplace";
			this.radioReplace.TabIndex = 1;
			this.radioReplace.Text = "Replace";
			// 
			// radioSplit
			// 
			this.radioSplit.Location = new System.Drawing.Point(232, 8);
			this.radioSplit.Name = "radioSplit";
			this.radioSplit.TabIndex = 2;
			this.radioSplit.Text = "Split";
			// 
			// labelLimit
			// 
			this.labelLimit.Location = new System.Drawing.Point(8, 212);
			this.labelLimit.Name = "labelLimit";
			this.labelLimit.Size = new System.Drawing.Size(32, 14);
			this.labelLimit.TabIndex = 8;
			this.labelLimit.Text = "Limit";
			// 
			// btnInvoke
			// 
			this.btnInvoke.Location = new System.Drawing.Point(8, 240);
			this.btnInvoke.Name = "btnInvoke";
			this.btnInvoke.Size = new System.Drawing.Size(440, 23);
			this.btnInvoke.TabIndex = 10;
			this.btnInvoke.Text = "Invoke RegexBuddy";
			this.btnInvoke.Click += new System.EventHandler(this.btnInvoke_Click);
			// 
			// numericLimit
			// 
			this.numericLimit.Location = new System.Drawing.Point(40, 208);
			this.numericLimit.Maximum = new System.Decimal(new int[] {
						65535,
						0,
						0,
						0});
			this.numericLimit.Name = "numericLimit";
			this.numericLimit.Size = new System.Drawing.Size(56, 20);
			this.numericLimit.TabIndex = 9;
			// 
			// FormActionDemo
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(456, 272);
			this.Controls.Add(this.numericLimit);
			this.Controls.Add(this.btnInvoke);
			this.Controls.Add(this.labelLimit);
			this.Controls.Add(this.radioSplit);
			this.Controls.Add(this.radioReplace);
			this.Controls.Add(this.radioMatch);
			this.Controls.Add(this.checkMultiline);
			this.Controls.Add(this.checkCaseless);
			this.Controls.Add(this.checkDotAll);
			this.Controls.Add(this.textReplace);
			this.Controls.Add(this.textRegex);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
			this.MaximizeBox = false;
			this.Name = "FormActionDemo";
			this.Text = "RegexBuddy Action Client Demo";
			((System.ComponentModel.ISupportInitialize)(this.numericLimit)).EndInit();
			this.ResumeLayout(false);
		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new FormActionDemo());
		}

		[DllImport("user32.dll")]
		public static extern bool SetForegroundWindow(uint hwnd);

		// We maintain only one connection to RegexBuddy for the entire application using static members
		// If an application creates more than one connection, it will launch more than once instance of RegexBuddy
		// Note that even if the user closes the instance of RegexBuddy created by our connection,
		// that instance will still remain resident in the background, until our application closes.
		// Each call to InitAction will reuse the same instance of RegexBuddy launched by our connection.
		static RegexBuddy.RegexBuddyIntfClass RegexBuddyConnection;

		// Since we use one connection for the entire application, we need to remember in which context
		// we called InitAction, so we know how to handle FinishAction.
		static FormActionDemo ActiveDemoForm;

		static void FinishAction(object Action)
		{
			if (ActiveDemoForm != null) {
				// Retrieve the updated action from RegexBuddy
				ActiveDemoForm.SetAction((object[])Action);
				// FinishAction is only called once per call to InitAction
				// So we should clean up this static reference
				ActiveDemoForm = null;
			}
		}

		private void btnInvoke_Click(object sender, System.EventArgs e)
		{
			if (RegexBuddyConnection == null) {
				// Connect to RegexBuddy
				try {
					RegexBuddyConnection = new RegexBuddy.RegexBuddyIntfClass();
				} catch (Exception ex) {
					MessageBox.Show("Could not connect to RegexBuddy because of the following error:\r\n" +
									ex.Message + "\r\n\r\n" +
									"Make sure that RegexBuddy is installed on your computer, and has been run at least once.",
									"Invoke RegexBuddy");
					return;
				}
				// Connect FinishAction event handler
				// Note: RegexBuddy supports only a single event handler per client connection.
				// Therefore, you cannot handle both the FinishAction and FinishAction events
				// using the event connection method used here.
				RegexBuddy.IRegexBuddyIntfEvents_FinishActionEventHandler FinishActionEventHandler =
					new RegexBuddy.IRegexBuddyIntfEvents_FinishActionEventHandler(FinishAction);
				RegexBuddyConnection.FinishAction += FinishActionEventHandler;
				// Make sure our instance of RegexBuddy makes it clear to the user that we're connected to it
				RegexBuddyConnection.IndicateApp(Text, (uint)Handle);
			}
			// Since we use one connection for the entire application, we need to remember in which context
			// we called InitAction, so we know how to handle FinishAction.
			ActiveDemoForm = this;
			// Send action to RegexBuddy
			RegexBuddyConnection.InitAction(GetAction());
			// Bring RegexBuddy to front.
			// SetForegroundWindow only works when the calling thread has input focus.
			// Since we have input focus when the user clicked our button,
			// it is our job to bring RegexBuddy to front.
			SetForegroundWindow(RegexBuddyConnection.GetWindowHandle());
		}

		object[] GetAction()
		{
			object[] Action = new object[9];
			Action[0] = 1;  // Version.  Must be 1.
			if (radioReplace.Checked) {
				Action[1] = 1;
			} else if (radioSplit.Checked) {
				Action[1] = 2;
			} else {
				Action[1] = 0;
			}
			Action[2] = textRegex.Text;
			Action[3] = textReplace.Text;
			Action[4] = checkDotAll.Checked;
			Action[5] = checkCaseless.Checked;
			Action[6] = checkMultiline.Checked;
			Action[7] = numericLimit.Value;
			Action[8] = "";  // Description
			return Action;
		}

		private void SetAction(object[] Action)
		{
			// Since we called InitRegex with Action[0] == 1,
			// FinishRegex will always be called with Action[0] == 1
			// But we check just in case
			if ((int)Action[0] == 1) {
				if ((int)Action[1] == 1) {
					radioReplace.Checked = true;
				} else if ((int)Action[1] == 2) {
					radioSplit.Checked = true;
				} else {
					radioMatch.Checked = true;
				}
				textRegex.Text = (string)Action[2];
				textReplace.Text = (string)Action[3];
				checkDotAll.Checked = (bool)Action[4];
				checkCaseless.Checked = (bool)Action[5];
				checkMultiline.Checked = (bool)Action[6];
				numericLimit.Value = (int)Action[7];
			}
		}
	}
}