using System.Windows.Data;

namespace System.Windows.Forms
{
    public class ColumnHeader
    {
        private static DataTemplate cellTemplate = (DataTemplate)System.Windows.Markup.XamlReader.Parse(
            "<DataTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>" +
            "<StackPanel Orientation=\"Horizontal\" Margin=\"2,1,2,1\">" +
            "<Image Source=\"{Binding ImageSource}\" Width=\"{Binding ImageSourceWidth}\" Height=\"{Binding ImageSourceHeight}\" Margin=\"0,0,4,0\"/>" +
            "<TextBlock x:Name=\"PART_TextBlock\" Text=\"{Binding SubItems[0].Text}\" VerticalAlignment=\"Center\"/>" +
            "</StackPanel></DataTemplate>");

        private ListView owner;

        internal System.Windows.Controls.GridViewColumn column { get; }

        public string Text
        {
            get => column.Header?.ToString();
            set => column.Header = value;
        }

        public int Width
        {
            get => (int)(column.Width * (owner != null ? owner.DpiScale : 1));
            set => column.Width = value / (owner != null ? owner.DpiScale : 1);
        }

        internal void SetOwner(ListView owner) => this.owner = owner;

        internal void SetBinding(int columnIndex)
        {
            if (columnIndex == 0)
                column.CellTemplate = cellTemplate;
            else
                column.DisplayMemberBinding = new Binding($"SubItems[{columnIndex}].Text");
        }

        public ColumnHeader()
        {
            column = new();
        }
    }
}