using System;
using System.Text.RegularExpressions;
using System.Threading;
using System.Windows.Forms;

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

        private void PasteButton_Click(object sender, EventArgs e)
        {
            LeftRichTextBox.Text = Clipboard.GetText();
        }

        private delegate void Action();

        private void FireButton_Click(object sender, EventArgs e)
        {
            var lrc = LeftRichTextBox.Text;
            var shouldFixFloatPoint = Fixed2CheckBox.Checked;
            var shouldRemoveBlankLines = RemoveBlankLinesCheckBox.Checked;
            var shouldRemoveBrackets = RemoveBracketsCheckBox.Checked;
            var shouldChangeFullWidthSpaceToHalfWide = FullWidthSpaceToHalfWideCheckBox.Checked;

            FireButton.Enabled = false;
            new Thread(() =>
            {
                try
                {
                    if (shouldFixFloatPoint)
                    {
                        lrc = Regex.Replace(lrc, @"(\[\d\d\:\d\d.\d\d)\d(\])", @"$1$2");
                        lrc = Regex.Replace(lrc, @"(\[\d\d\:\d\d.\d)(\])", @"${1}0$2");
                    }

                    if (shouldRemoveBlankLines)
                    {
                        lrc = string.Join(Environment.NewLine,
                            Regex.Replace(lrc, @"^\[\d\d\:\d\d.\d\d\]\s*$", "", RegexOptions.Multiline)
                                .Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries)
                        );
                    }

                    if (shouldRemoveBrackets)
                    {
                        lrc = string.Join(Environment.NewLine,
                            Regex.Replace(lrc, @"[（\(]\p{IsHiragana}+?[\)）]", "")
                                .Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries)
                        );
                    }

                    if (shouldChangeFullWidthSpaceToHalfWide)
                    {
                        lrc = lrc.Replace("　", " ");
                    }

                    Invoke(new Action(() => RightRichTextBox.Text = lrc));
                }
                catch (Exception exception)
                {
                    MessageBox.Show(exception.ToString());
                }

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