using System;
using System.Net;
using System.Text;
using System.Threading;
using System.Web;
using System.Windows.Forms;

namespace LrcTool
{
    public partial class LrcFetcherPage : UserControl
    {
        public LrcFetcherPage()
        {
            InitializeComponent();
        }

        private void PasteLinkLabel_Click(object sender, EventArgs e)
        {
            var text = Clipboard.GetText();
            var uri = new Uri(text);
            var queryString = HttpUtility.ParseQueryString(uri.Query);
            var songId = queryString["id"];

            SongUrlTextBox.Text = text;
            SongIdTextBox.Text = songId;
            LrcApiTextBox.Text = $"http://music.163.com/api/song/media?id={songId}";
        }

        private delegate void Action();

        private void FireButton_Click(object sender, EventArgs e)
        {
            var url = LrcApiTextBox.Text;

            FireButton.Enabled = false;

            new Thread(() =>
            {
                void Log(string text)
                {
                    Invoke(new Action(() =>
                    {
                        LeftRichTextBox.AppendText($"{text}{Environment.NewLine}");
                        LeftRichTextBox.SelectionStart = LeftRichTextBox.Text.Length;
                        LeftRichTextBox.ScrollToCaret();
                    }));
                }

                try
                {
                    Log($"Fetching {url}");
                    var json = new WebClient { Encoding = Encoding.UTF8 }.DownloadString(url);
                    Log($"Result: {json}");
                    var jsonObject = (Newtonsoft.Json.Linq.JObject)Newtonsoft.Json.JsonConvert.DeserializeObject(json);
                    Log("Parsing...");
                    var lrc = jsonObject.Value<string>("lyric");
                    Log("Output...");
                    Invoke(new Action(() => RightRichTextBox.Text = lrc));
                    Log("OK");
                }
                catch (Exception exception)
                {
                    Log("---- BEGIN EXCEPTION ----");
                    Log(exception.ToString());
                    Log("---- END EXCEPTION ----");
                }

                Invoke(new Action(() => FireButton.Enabled = true));
            }).Start();
        }

        private void CopyButton_Click(object sender, EventArgs e)
        {
            Clipboard.SetText(RightRichTextBox.Text);
        }
    }
}