using System;
using System.Collections.Generic;
using System.Linq;
using System.Speech.Recognition;
using System.Speech.Synthesis;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Speech
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private SpeechRecognitionEngine _speechRecognizer;

        public MainWindow()
        {
            InitializeComponent();
            InitInstance();
        }

        private async void InitInstance()
        {
            _speechRecognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-US"));
            _speechRecognizer.LoadGrammar(new DictationGrammar());
            _speechRecognizer.SpeechRecognized += _speechRecognizer_SpeechRecognized;
            _speechRecognizer.SetInputToDefaultAudioDevice();
        }

        private void speechButton_Click(object sender, RoutedEventArgs e)
        {
            PromptBuilder promptBuilder = new PromptBuilder();
            promptBuilder.AppendText("안녕하세요!");

            PromptStyle promptStyle = new PromptStyle();
            promptStyle.Volume = PromptVolume.Soft;
            promptStyle.Rate = PromptRate.Slow;
            promptBuilder.StartStyle(promptStyle);
            promptBuilder.AppendText("저는 스피치 신디사이저입니다.");
            promptBuilder.EndStyle();

            promptBuilder.AppendText("오늘은");
            promptBuilder.AppendTextWithHint(DateTime.Now.ToShortDateString(), SayAs.Date);
            promptBuilder.AppendText(DateTime.Now.ToString("yyyy년 MM월 dd일 HH시 mm분 ss초 fff밀리세컨드"));

            promptBuilder.AppendText("입니다. 이제부터 학습을 시작합시다.");
            promptBuilder.AppendText("지금 바로", PromptEmphasis.Strong);
            promptBuilder.AppendText("시작 합니다.");
            promptBuilder.AppendTextWithHint("WPF", SayAs.SpellOut);
            promptBuilder.AppendText("의 세계로!");


            SpeechSynthesizer speechSynthesizer = new SpeechSynthesizer();
            speechSynthesizer.Speak(promptBuilder);
        }

        private void recognizeButton_Click(object sender, RoutedEventArgs e)
        {
            if (recognizeButton.IsChecked == true)
                _speechRecognizer.RecognizeAsync(RecognizeMode.Multiple);
            else
                _speechRecognizer.RecognizeAsyncStop();
        }

        private void _speechRecognizer_SpeechRecognized(object? sender, SpeechRecognizedEventArgs e)
        {
            recognizeBox.AppendText(e.Result.Text);
        }
    }
}