using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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 Aitex.UI.Charting
{
    /// <summary>
    /// Interaction logic for LuaEditor.xaml
    /// </summary>
    public partial class LuaEditor : UserControl
    {
        public LuaEditor()
        {
            InitializeComponent();
        }

        public void SetHotWords(List<string> hotWords)
        {
            _hotWords = hotWords;
        }

        List<string> _hotWords = new List<string>();

        public string Text
        {
            get
            {
                return textBox1.Text;
            }
            set
            {
                textBox1.Text = value;
            }
        }

        private void OnKeyUp(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.OemPeriod)
            {
                var rect = textBox1.GetRectFromCharacterIndex(textBox1.SelectionStart);
                listBox1.Margin = new Thickness(rect.Left + 5, rect.Top + 14, 0, 0);
                int index = textBox1.SelectionStart;
                while (index > 0 && index <= textBox1.Text.Length)
                {
                    var curChar = textBox1.Text[index - 1];
                    if (curChar == ' ' ||
                        curChar == '\r' ||
                         curChar == '\n' ||
                        curChar == '\t')
                    {
                        break;
                    }
                    index--;
                }

                string keyWord = textBox1.Text.Substring(index, textBox1.SelectionStart - index);

                Dictionary<string, string> dics = new Dictionary<string, string>();
                foreach (var item in _hotWords)
                {
                    if (item.Contains(keyWord))
                    {
                        var leftStr = item.Replace(keyWord, "");
                        var split = leftStr.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
                        if (split.Length > 1)
                        {
                            var ss = "+" + split[0];
                            if (!dics.ContainsKey(ss))
                            {
                                dics.Add(ss, split[0]);
                            }
                        }
                        else if (split.Length == 1)
                        {
                            var ss = " " + split[0];
                            if (!dics.ContainsKey(ss))
                            {
                                dics.Add(ss, split[0]);
                            }
                        }
                    }
                }

                listBox1.Items.Clear();

                if (dics.Keys.Count > 0)
                {
                    var keys = dics.Keys.ToList();
                    keys.Sort();
                    foreach (var key in keys)
                    {
                        TextBlock tb = new TextBlock() { Text = key, Tag = dics[key], FontSize = 12 };
                        listBox1.Items.Add(tb);
                    }
                    listBox1.Visibility = System.Windows.Visibility.Visible;
                    listBox1.Focus();
                }
                else
                {
                    listBox1.Visibility = System.Windows.Visibility.Hidden;
                    textBox1.Focus();
                }
            }
            else
            {
                listBox1.Visibility = System.Windows.Visibility.Hidden;
            }
        }

        private void listBox1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                var tb = listBox1.SelectedItem as TextBlock;
                if (tb != null)
                {
                    listBox1.Visibility = System.Windows.Visibility.Hidden;
                    int selStart = textBox1.SelectionStart;
                    string insertStr = (string)tb.Tag;
                    textBox1.Text = textBox1.Text.Insert(textBox1.SelectionStart, insertStr);
                    textBox1.SelectionStart = selStart + insertStr.Length;
                    textBox1.Focus();
                }
            }
            else if (e.Key == Key.Back)
            {
                listBox1.Visibility = System.Windows.Visibility.Hidden;
                int selStart = textBox1.SelectionStart;
                textBox1.Text = textBox1.Text.Remove(selStart - 1, 1);
                textBox1.SelectionStart = selStart - 1;
                textBox1.Focus();
            }
        }
    }
}