using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace GeoSigma.SigmaDrawerStyle
{
    /// <summary>
    /// 曲线样式 UI 界面
    /// </summary>
    public class PropertyEditorWellCurveStyle : UITypeEditor
    {
        /// <inheritdoc/>
        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.Modal;
        }

        /// <inheritdoc/>
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            if (!(value is WellLineStyle style))
            {
                return value;
            }

            IWindowsFormsEditorService edSvc = provider?.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;
            if (edSvc == null)
            {
                return value;
            }

            using (var editorForm = new WellCurveStyleEditForm(style))
            {
                if (edSvc.ShowDialog(editorForm) == DialogResult.OK)
                {
                    WellLineStyle retStyle = new WellLineStyle();
                    retStyle.Color = editorForm.style.Color;
                    retStyle.Width = editorForm.style.Width;
                    retStyle.Style = editorForm.style.Style;
                    return retStyle;
                }
            }

            return value;
        }

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

        /// <inheritdoc/>
        public override void PaintValue(PaintValueEventArgs e)
        {
            if (e.Value is WellLineStyle style)
            {
                var g = e.Graphics;
                var rect = e.Bounds;

                using (var pen = new Pen(style.Color, (float)Math.Max(1, style.Width)))
                {
                    // 设置 DashStyle（除非 Solid 属性强制为实线）
                    pen.DashStyle = DashStyle.Solid;

                    // 居中画线
                    int y = rect.Top + (rect.Height / 2);
                    g.DrawLine(pen, rect.Left, y, rect.Right, y);
                }
            }
        }
    }
}