using NAudio.Wave;
using NAudio.Vorbis;
 
namespace WindowsFormsApp3
{
    public partial class Form1 : Form
    {
        string[] files;
        List<string> localmusiclist = new List<string>{};
        public Form1()
        {
            InitializeComponent();
        }
        private void musicplay(string filename)
        {
            string extension = Path.GetExtension(filename);//fanhuiwenjiandekuozhanhouzhuiming
            if (extension == ".ogg") { Console.WriteLine("這是ogg文件"); }
            else
            {
                Console.WriteLine("這不是ogg文件");
                axWindowsMediaPlayer1.Ctlcontrols.play();
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "選擇音頻|*mp3;*.wav;*.flac";
            openFileDialog1.Multiselect = true;
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                listBox1.Items.Clear();//將新文件導入，將原文件清空
                if (files != null)
                {
                    Array.Clear(files, 0, files.Length);
                }
                files = openFileDialog1.FileNames;//因為filenames必須為數(shù)組
                string[] array = files;
                foreach (string x in array)
                {
                    listBox1.Items.Add(x);
                    localmusiclist.Add(x);
                }
            }
        }
 
        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (localmusiclist.Count > 0)
            {
                axWindowsMediaPlayer1.URL = localmusiclist[listBox1.SelectedIndex];
                musicplay(axWindowsMediaPlayer1.URL);
                label1.Text = Path.GetFileNameWithoutExtension(localmusiclist[listBox1.SelectedIndex]);
            }
        }
 
        private void trackBar1_Scroll(object sender, EventArgs e)
        {
            axWindowsMediaPlayer1.settings.volume = trackBar1.Value;
            label2.Text=trackBar1.Value+"%";
        }
 
        private void button2_Click(object sender, EventArgs e)
        {
            axWindowsMediaPlayer1.Ctlcontrols.stop();
        }
 
        private void button3_Click(object sender, EventArgs e)
        {
            int nextIndex= listBox1.SelectedIndex;
            if (localmusiclist.Count > 0)
            {
                if (listBox1.SelectedIndex + 1 > localmusiclist.Count)
                {
                    nextIndex = 0;
                }
                axWindowsMediaPlayer1.URL = localmusiclist[nextIndex];
                musicplay(axWindowsMediaPlayer1.URL);
                label1.Text = Path.GetFileNameWithoutExtension(localmusiclist[nextIndex]);
                listBox1.SelectedIndex = nextIndex;
            }
        }
 
        private void button4_Click(object sender, EventArgs e)
        {
            string oggFilePath="";
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "播放音頻|*.ogg";
            if(openFileDialog.ShowDialog() == DialogResult.OK) 
            { 
                oggFilePath =openFileDialog.FileName;
            }
 
            using (var vorbis = new VorbisWaveReader(oggFilePath))
            {
                using (var waveOut = new WaveOutEvent())
                    {
                       waveOut.Init(vorbis);
                       waveOut.Play(); 
                    while(waveOut.PlaybackState == PlaybackState.Playing)
                    {
                        System.Threading.Thread.Sleep(1000);
                    }
                    }
            }
        }
    }
}