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

namespace Xylem.Common.Utils.UserAccessCtrl
{
    public enum ProgressBarDisplayMode
    {
        NoText,
        Percentage,
        CurrProgress,
        CustomText,
        TextAndPercentage,
        TextAndCurrProgress
    }

    public class TextProgressBar : ProgressBar
    {
        [Description("Font of the text on ProgressBar"), Category("Additional Options")]
        public Font TextFont { get; set; } = new Font(FontFamily.GenericSerif, 11, FontStyle.Bold | FontStyle.Italic);

        private SolidBrush _textColourBrush = (SolidBrush)Brushes.Black;
        [Category("Additional Options")]
        public Color TextColor
        {
            get
            {
                return _textColourBrush.Color;
            }
            set
            {
                _textColourBrush.Dispose();
                _textColourBrush = new SolidBrush(value);
            }
        }

        private SolidBrush _progressColourBrush = (SolidBrush)Brushes.LightGreen;
        [Category("Additional Options"), Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]
        public Color ProgressColor
        {
            get
            {
                return _progressColourBrush.Color;
            }
            set
            {
                _progressColourBrush.Dispose();
                _progressColourBrush = new SolidBrush(value);
            }
        }

        private ProgressBarDisplayMode _visualMode = ProgressBarDisplayMode.CurrProgress;
        [Category("Additional Options"), Browsable(true)]
        public ProgressBarDisplayMode VisualMode
        {
            get
            {
                return _visualMode;
            }
            set
            {
                _visualMode = value;
                Invalidate();//redraw component after change value from VS Properties section
            }
        }

        private String _text = string.Empty;

        [Description("If it's empty, % will be shown"), Category("Additional Options"), Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]
        public String CustomText
        {
            get
            {
                return _text;
            }
            set
            {
                _text = value;
                Invalidate();//redraw component after change value from VS Properties section
            }
        }

        private String _textToDraw
        {
            get
            {
                String text = CustomText;

                switch (VisualMode)
                {
                    case (ProgressBarDisplayMode.Percentage):
                        text = _percentageStr;
                        break;
                    case (ProgressBarDisplayMode.CurrProgress):
                        text = _currProgressStr;
                        break;
                    case (ProgressBarDisplayMode.TextAndCurrProgress):
                        text = $"{CustomText}: {_currProgressStr}";
                        break;
                    case (ProgressBarDisplayMode.TextAndPercentage):
                        text = $"{CustomText}: {_percentageStr}";
                        break;
                }

                return text;
            }
            set { }
        }

        private String _percentageStr { get { return $"{(Int32)((Single)Value - Minimum) / ((Single)Maximum - Minimum) * 100 } %"; } }

        private String _currProgressStr
        {
            get
            {
                return $"{Value}/{Maximum}";
            }
        }

        public TextProgressBar()
        {
            Value = Minimum;
            FixComponentBlinking();
        }

        private void FixComponentBlinking()
        {
            SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer, true);
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            Graphics g = e.Graphics;

            DrawProgressBar(g);

            DrawStringIfNeeded(g);
        }

        private void DrawProgressBar(Graphics g)
        {
            Rectangle rect = ClientRectangle;
            
            ProgressBarRenderer.DrawHorizontalBar(g, rect);

            rect.Inflate(-3, -3);

            if (Value > 0)
            {
                Rectangle clip = new Rectangle(rect.X, rect.Y, (Int32)Math.Round(((Single)Value / Maximum) * rect.Width), rect.Height);
                try
                {
                    g.FillRectangle(_progressColourBrush, clip);
                }
                catch (Exception)
                {

                }    
              
            }
        }

        private void DrawStringIfNeeded(Graphics g)
        {
            if (VisualMode != ProgressBarDisplayMode.NoText)
            {

                String text = _textToDraw;

                SizeF len = g.MeasureString(text, TextFont);

                Point location = new Point(((Width / 2) - (Int32)len.Width / 2), ((Height / 2) - (Int32)len.Height / 2));

                g.DrawString(text, TextFont, (Brush)_textColourBrush, location);
            }
        }

        public new void Dispose()
        {
            _textColourBrush.Dispose();
            _progressColourBrush.Dispose();
            base.Dispose();
        }
    }
}