using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media.Imaging;
using Tango.Scripting.Editors.Document;
using Tango.Scripting.Editors.Editing;

namespace Tango.Scripting.Editors.Intellisense
{
    public abstract class CompletionItem : DependencyObject, ICompletionItem
    {
        public abstract string Text { get; }
        public object Description { get; set; }
        public double Priority { get; set; }
        public abstract CompletionItemPopupControl PopupControl { get; }

        public bool IsSelected
        {
            get { return (bool)GetValue(IsSelectedProperty); }
            set { SetValue(IsSelectedProperty, value); }
        }
        public static readonly DependencyProperty IsSelectedProperty =
            DependencyProperty.Register("IsSelected", typeof(bool), typeof(CompletionItem), new PropertyMetadata(false));

        public virtual void Complete(ScriptEditor editor)
        {
            var word = editor.GetCurrentWord();
            int index = editor.GetCurrentWordStartIndex();
            int max = editor.GetCurrentLine().EndOffset;

            editor.Document.Replace(index, word.Length,Text);
        }

        public abstract BitmapSource Image { get; }

        protected static BitmapSource GetImage(String name)
        {
            return new BitmapImage(new Uri($"pack://application:,,,/Tango.Scripting.Editors;component/Images/{name}", UriKind.Absolute));
        }

        public override string ToString()
        {
            return Text;
        }
    }
}