using HotelPms.Share.Windows.GraphicsApi;
using HotelPms.Share.Windows.Util;
using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace HotelPms.Share.Windows.Component
{
    public class ButtonFlat : System.Windows.Forms.Button
    {
        private bool m_DisableClickEvent = true;

        /// <summary>
        /// Click連打禁止 【※注意：ボタンイベントの中でFrom.Show()を使うとShownイベントなども消える場合があります。】
        /// </summary>
        [Description("Click連打禁止 【※注意：ボタンイベントの中でFrom.Show()を使うとShownイベントなども消える場合があります。】"), Category("拡張動作"), DefaultValue(true)]
        public bool DisableClickEvent
        {
            get { return m_DisableClickEvent; }
            set { m_DisableClickEvent = value; }
        }

        private LinearGradientMode m_GradientMode = LinearGradientMode.Horizontal;

        [Description("GradientMode"), Category("拡張動作"), DefaultValue(LinearGradientMode.Horizontal)]
        public LinearGradientMode GradientMode
        {
            get { return m_GradientMode; }
            set { m_GradientMode = value; Invalidate(); }
        }

        private Color m_GradientColor = Color.Empty;

        [Description("GradientColor"), Category("拡張動作")]
        public Color GradientColor
        {
            get { return m_GradientColor; }
            set { m_GradientColor = value; Invalidate(); }
        }
        
        private bool m_Selected = false;
        private bool m_MouseFocused = false;
        private StringFormat m_StringFormat = new StringFormat();
        private Image imgEllipse = null;

        protected override void Dispose(bool disposing)
        {
            if (imgEllipse != null) { imgEllipse.Dispose(); }
            m_StringFormat.Dispose();
            base.Dispose(disposing);
        }

        protected override void OnPaint(PaintEventArgs pevent)
        {
            base.OnPaint(pevent);
            if (this.FlatStyle != FlatStyle.Flat) { return; }

            //ControlPaint.Light
            Color beginColor = this.m_MouseFocused ? (FlatAppearance.MouseOverBackColor == Color.Empty ? ControlPaint.Light(this.BackColor) : FlatAppearance.MouseOverBackColor) : m_Selected ? (FlatAppearance.MouseDownBackColor == Color.Empty ? ControlPaint.Light(this.BackColor) : FlatAppearance.MouseDownBackColor) : this.BackColor;
            Color endColor = m_GradientColor == Color.Empty ? beginColor : this.m_MouseFocused ? ControlPaint.LightLight(m_GradientColor) : m_Selected ? ControlPaint.Light(m_GradientColor) : m_GradientColor;

            //using (LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, Color.FromArgb(0, 136, 0), Color.FromArgb(0, 166, 0), m_GradientMode))
            using (LinearGradientBrush brush = new LinearGradientBrush(this.ClientRectangle, beginColor, endColor, m_GradientMode))
            {
                pevent.Graphics.FillRectangle(brush, this.ClientRectangle);
            }

            //線
            if (this.FlatAppearance.BorderSize > 0 && !this.FlatAppearance.BorderColor.Equals(Color.Empty))
            {
                using (Pen pen = new Pen(this.FlatAppearance.BorderColor, this.FlatAppearance.BorderSize))
                {
                    pevent.Graphics.DrawRectangle(pen, new Rectangle(this.ClientRectangle.X, this.ClientRectangle.Y, this.ClientRectangle.Width - this.FlatAppearance.BorderSize, this.ClientRectangle.Height - this.FlatAppearance.BorderSize));
                }
            }

            Rectangle textRect = ClientRectangle;
            if (Image != null && imgEllipse == null)
            {
                imgEllipse = GdiPlus.CutEllipse(Image, new Rectangle(0, 0, Image.Size.Width, Image.Size.Height), Image.Size);
            }

            if (imgEllipse != null)
            {
                //高さの80%で出力
                int imgHeight = (int)(ClientRectangle.Height * 0.8F);
                int adding = (int)(textRect.Height - imgHeight) / 2;
                pevent.Graphics.DrawImage(imgEllipse, new Rectangle(adding, adding, imgHeight, imgHeight));
                textRect = new Rectangle(new Point(textRect.Location.X + textRect.Height, 0), new Size(textRect.Width - textRect.Height, textRect.Height));
            }

            SetStringFormat();
            using (SolidBrush foreBrush = new SolidBrush(this.ForeColor))
            {
                pevent.Graphics.DrawString(this.Text, this.Font, foreBrush, textRect, m_StringFormat);
            }
        }

        private void SetStringFormat()
        {
            switch (this.TextAlign)
            {
                case ContentAlignment.BottomCenter:
                case ContentAlignment.BottomLeft:
                case ContentAlignment.BottomRight:
                    m_StringFormat.LineAlignment = StringAlignment.Far;
                    break;
                case ContentAlignment.MiddleCenter:
                case ContentAlignment.MiddleLeft:
                case ContentAlignment.MiddleRight:
                    m_StringFormat.LineAlignment = StringAlignment.Center;
                    break;
                case ContentAlignment.TopCenter:
                case ContentAlignment.TopLeft:
                case ContentAlignment.TopRight:
                    m_StringFormat.LineAlignment = StringAlignment.Near;
                    break;
            }

            switch (this.TextAlign)
            {
                case ContentAlignment.TopLeft:
                case ContentAlignment.BottomLeft:
                case ContentAlignment.MiddleLeft:
                    m_StringFormat.Alignment = StringAlignment.Near;
                    break;
                case ContentAlignment.MiddleCenter:
                case ContentAlignment.BottomCenter:
                case ContentAlignment.TopCenter:
                    m_StringFormat.Alignment = StringAlignment.Center;
                    break;
                case ContentAlignment.BottomRight:
                case ContentAlignment.MiddleRight:
                case ContentAlignment.TopRight:
                    m_StringFormat.Alignment = StringAlignment.Far;
                    break;
            }
        }

        protected override void OnEnter(EventArgs e)
        {
            base.OnEnter(e);
            m_Selected = true;
        }

        protected override void OnLeave(EventArgs e)
        {
            base.OnLeave(e);
            m_Selected = false;
        }

        protected override void OnMouseEnter(EventArgs e)
        {
            base.OnMouseEnter(e);
            m_MouseFocused = true;
        }

        protected override void OnMouseLeave(EventArgs e)
        {
            base.OnMouseLeave(e);
            m_MouseFocused = false;
        }

        protected override void OnClick(EventArgs e)
        {
            //System.Diagnostics.Debug.WriteLine("base.OnClick begin");
            base.OnClick(e);

            //System.Diagnostics.Debug.WriteLine("base.OnClick end ");

            //保留されているメッセージを削除し、２度押しを許可しない
            if (m_DisableClickEvent) { RemovePeekMessage.Invoke(); }
        }
    }
}