// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright © Microsoft Corporation. All rights reserved

namespace Microsoft.Samples.Speech.Recognition.SimpleTts
{
    using System;
    using System.Windows.Forms;
    using System.Threading;
    using SpeechLib;

    /// <summary>
    ///     This form shows how TTS speak works. 
    /// </summary>
    public class SimpleTtsForm : System.Windows.Forms.Form
    {
        private System.Windows.Forms.CheckBox chkSaveToWavFile;
        private System.Windows.Forms.Button btnSpeak;
        private System.Windows.Forms.TextBox txtSpeakText;
        private System.Windows.Forms.Button btnExit;

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

        /// <summary>
        ///     Clean up any resources being used.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                // Nothing to 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.btnSpeak = new System.Windows.Forms.Button();
            this.chkSaveToWavFile = new System.Windows.Forms.CheckBox();
            this.chkSaveToWavFile.Location = new System.Drawing.Point(8, 80);
            this.chkSaveToWavFile.Size = new System.Drawing.Size(90, 24);

            this.btnExit = new System.Windows.Forms.Button();
            this.txtSpeakText = new System.Windows.Forms.TextBox();
            this.btnSpeak.Location = new System.Drawing.Point(108, 80);
            this.btnSpeak.Size = new System.Drawing.Size(80, 24);
            this.btnSpeak.TabIndex = 4;
            this.btnSpeak.Text = "&Speak";
            this.btnSpeak.Click += new System.EventHandler(this.btnSpeak_Click);
            this.btnExit.Location = new System.Drawing.Point(200, 80);
            this.btnExit.Size = new System.Drawing.Size(80, 24);
            this.btnExit.TabIndex = 2;
            this.btnExit.Text = "&Exit";
            this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
            this.chkSaveToWavFile.Text = "Save to .wav";
            this.txtSpeakText.Location = new System.Drawing.Point(8, 8);
            this.txtSpeakText.Size = new System.Drawing.Size(284, 60);
            this.txtSpeakText.TabIndex = 3;
            this.txtSpeakText.Multiline  = true;

            this.txtSpeakText.Text = "This is Simple TTS application.";
            this.txtSpeakText.WordWrap = true;
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(299, 120);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {this.btnExit,
                                                                          this.btnSpeak,
                                                                          this.txtSpeakText,
                                                                          this.chkSaveToWavFile});
            this.MaximizeBox = false;
            this.Text = "SimpleTts";

        }
        #endregion

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

        private void btnSpeak_Click(object sender, System.EventArgs e)
        {
            //Create a TTS voice and speak.
            try 
            {
                SpeechVoiceSpeakFlags SpFlags = SpeechVoiceSpeakFlags.SVSFlagsAsync;
                SpVoice Voice = new SpVoice();
                if (chkSaveToWavFile.Checked)
                {
                    SaveFileDialog sfd = new SaveFileDialog();
        
                    sfd.Filter = "All files (*.*)|*.*|wav files (*.wav)|*.wav";
                    sfd.Title = "Save to a wave file";
                    sfd.FilterIndex = 2;
                    sfd.RestoreDirectory = true;
        
                    if (sfd.ShowDialog()== DialogResult.OK) 
                    {

                        SpeechStreamFileMode SpFileMode = SpeechStreamFileMode.SSFMCreateForWrite;

                        SpFileStream SpFileStream = new SpFileStream();
                        SpFileStream.Open(sfd.FileName, SpFileMode, false);

                        Voice.AudioOutputStream = SpFileStream;
                        Voice.Speak(txtSpeakText.Text, SpFlags);
                        Voice.WaitUntilDone(Timeout.Infinite);

                        SpFileStream.Close();

                    }
                }
                else
                {
                    Voice.Speak(txtSpeakText.Text, SpFlags);
                }
            }
            catch(Exception error)
            {
                MessageBox.Show("Speak error", error.Message, MessageBoxButtons.OK, MessageBoxIcon.Error);

                throw;
            }

        }

        private void btnExit_Click(object sender, System.EventArgs e)
        {
          this.Dispose();
        }
    }
}