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

namespace Bro.UI.Model.Winform
{
    public partial class IOIndicatorCtrl : UserControl
    {
        public IOIndicatorCtrl()
        {
            InitializeComponent();
        }

        private bool? isON = null;
        public bool? IsOn
        {
            get => isON;
            set
            {
                bool? temp = isON;
                isON = value;

                if (temp != isON)
                {
                    RefreshStatus();
                }
            }
        }

        private void RefreshStatus()
        {
            if (InvokeRequired)
            {
                Invoke(new Action(() => RefreshStatus()));
            }
            else
            {
                plStatus.Invalidate();
            }
        }

        private string desc = "";
        public string Desc
        {
            get => desc;
            set
            {
                desc = value;

                DisplayDesc();
            }
        }

        private void DisplayDesc()
        {
            if (InvokeRequired)
            {
                Invoke(new Action(() => DisplayDesc()));
            }
            else
            {
                lblDesc.Text = Desc;
            }
        }

        readonly PointF[] regionBlink = new PointF[]
        {
            new PointF(5,10),
            new PointF(10,13),
            new PointF(12,7),
            new PointF(10,5)
        };

        public IOIndicatorCtrl(bool _isOn, string _desc)
        {
            InitializeComponent();

            IsOn = _isOn;
            Desc = _desc;
        }

        private void plStatus_Paint(object sender, PaintEventArgs e)
        {
            Panel pl = sender as Panel;

            Graphics g = e.Graphics;

            g.Clear(System.Drawing.SystemColors.Control);

            if (IsOn != null)
            {
                if (IsOn.Value)
                {
                    g.FillEllipse(Brushes.LightGreen, pl.ClientRectangle);
                }
                else
                {
                    g.FillEllipse(Brushes.Gray, pl.ClientRectangle);
                }

                g.FillPolygon(Brushes.White, regionBlink);
            }
        }

        public event Action<string,bool> OnIODoubleClick;

        private void lblDesc_DoubleClick(object sender, EventArgs e)
        {
            if (IsOn != null)
            {
                OnIODoubleClick?.Invoke(Name,IsOn.Value);
            }
        }

        private void plStatus_DoubleClick(object sender, EventArgs e)
        {
            if (IsOn != null)
            {
                OnIODoubleClick?.Invoke(Name, IsOn.Value);
            }
        }
    }
}