using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms.Design;
using GeoSigma.SigmaDrawerStyle;
using GeoSigmaDrawLib;

namespace GeoSigma.SigmaDrawerElement
{
    /// <summary>
    /// 填充符号
    /// </summary>
    public class PropertyEditorFillSymbol : UITypeEditor
    {
        /// <inheritdoc/>
        public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.DropDown;
        }

        /// <inheritdoc/>
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
            if (edSvc == null)
            {
                return base.EditValue(context, provider, value);
            }

            var listBox = new MarkListBox();
            listBox.SelectedIndexChanged += (s, e) =>
            {
                edSvc.CloseDropDown();
            };

            edSvc.DropDownControl(listBox);

            return listBox.SelectedItem != null ? listBox.SelectedItem.ToString() : string.Empty;
        }

        /// <inheritdoc/>
        public override void PaintValue(PaintValueEventArgs e)
        {
            if (e.Value is string name)
            {
                Bitmap bitmap = GetBitmap(e.Value.ToString(), e.Bounds.Width, e.Bounds.Height);
                if (bitmap != null)
                {
                    using (bitmap)
                    {
                        e.Graphics.DrawImage(bitmap, e.Bounds);
                    }
                }
            }
        }

        /// <inheritdoc/>
        public override bool GetPaintValueSupported(System.ComponentModel.ITypeDescriptorContext context)
        {
            return true;
        }

        private Bitmap GetBitmap(string name, int width, int height)
        {
            Bitmap bitmap = new Bitmap(width, height);
            using (Graphics image = Graphics.FromImage(bitmap))
            {
                IntPtr hdc = image.GetHdc();
                bool success = false;

                try
                {
                    success = GeoSigmaWellPoleXY.GetDrawCurveFillSymbol(name, hdc, width, height);
                }
                finally
                {
                    image.ReleaseHdc(hdc);
                }

                if (!success)
                {
                    bitmap.Dispose();
                    return null;
                }
            }

            return bitmap;
        }
    }
}