using System.Drawing;

namespace System.Windows.Forms
{
    public class DrawItemEventArgs : EventArgs
    {
        private Color backColor;

        private Color foreColor;

        private Font font;

        private readonly Graphics graphics;

        private readonly int index;

        private readonly Rectangle rect;

        private readonly DrawItemState state;

        public Color BackColor
        {
            get
            {
                if ((state & DrawItemState.Selected) == DrawItemState.Selected)
                {
                    return System.Drawing.SystemColors.Highlight;
                }
                if ((state & DrawItemState.Disabled) == DrawItemState.Disabled)
                {
                    return System.Drawing.SystemColors.Control;
                }
                if ((state & DrawItemState.HotLight) == DrawItemState.HotLight)
                {
                    return System.Drawing.SystemColors.ControlLight;
                }

                return backColor;
            }
        }

        public Rectangle Bounds => rect;

        public Font Font => font;

        public Color ForeColor
        {
            get
            {
                if ((state & DrawItemState.Selected) == DrawItemState.Selected)
                {
                    return System.Drawing.SystemColors.HighlightText;
                }
                if ((state & DrawItemState.Disabled) == DrawItemState.Disabled)
                {
                    return System.Drawing.SystemColors.GrayText;
                }

                return foreColor;
            }
        }

        public Graphics Graphics => graphics;

        public int Index => index;

        public DrawItemState State => state;

        public DrawItemEventArgs(Graphics graphics, Font font, Rectangle rect, int index, DrawItemState state)
        {
            this.graphics = graphics;
            this.font = font;
            this.rect = rect;
            this.index = index;
            this.state = state;
            foreColor = System.Drawing.SystemColors.WindowText;
            backColor = System.Drawing.SystemColors.Window;
        }

        public DrawItemEventArgs(Graphics graphics, Font font, Rectangle rect, int index, DrawItemState state, Color foreColor, Color backColor)
        {
            this.graphics = graphics;
            this.font = font;
            this.rect = rect;
            this.index = index;
            this.state = state;
            this.foreColor = foreColor;
            this.backColor = backColor;
        }

        public virtual void DrawBackground()
        {
            Brush brush = new SolidBrush(BackColor);
            Graphics.FillRectangle(brush, rect);
            brush.Dispose();
        }

        public virtual void DrawFocusRectangle()
        {
        }
    }

    public delegate void DrawItemEventHandler(object sender, DrawItemEventArgs e);

}