using ColorMine.ColorSpaces;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;
using System.Windows.Threading;
using Tango.Core;
using Tango.SharedUI;

namespace Tango.MachineStudio.RML.ViewModels
{
    public class RgbVM : ExtendedObject
    {
        private DispatcherTimer _color_change_timer;

        public event EventHandler<Color> ColorChanged;

        public bool SynchronizeColorSpaces { get; set; }

        public RgbVM()
        {
            SynchronizeColorSpaces = true;

            _color_change_timer = new DispatcherTimer();
            _color_change_timer.Interval = TimeSpan.FromMilliseconds(30);
            _color_change_timer.Tick += _color_change_timer_Tick;
            _color_change_timer.Stop();

            _color = Colors.DimGray;
        }

        private void _color_change_timer_Tick(object sender, EventArgs e)
        {
            _color_change_timer.Stop();
            ColorChanged?.Invoke(this, Color);
        }

        private double _red;
        public double Red
        {
            get { return _red; }
            set { _red = value; SynchronizeColor(); RaisePropertyChangedAuto(); }
        }

        private double _green;
        public double Green
        {
            get { return _green; }
            set { _green = value; SynchronizeColor(); RaisePropertyChangedAuto(); }
        }

        private double _blue;
        public double Blue
        {
            get { return _blue; }
            set { _blue = value; SynchronizeColor(); RaisePropertyChangedAuto(); }
        }

        private double _l;
        public double L
        {
            get { return _l; }
            set { _l = value; SynchronizeColor(); RaisePropertyChangedAuto(); }
        }

        private double _a;
        public double A
        {
            get { return _a; }
            set { _a = value; SynchronizeColor(); RaisePropertyChangedAuto(); }
        }

        private double _b;
        public double B
        {
            get { return _b; }
            set { _b = value; SynchronizeColor(); RaisePropertyChangedAuto(); }
        }

        private Color _color;
        public Color Color
        {
            get { return _color; }
            set { _color = value; RaisePropertyChanged(nameof(Color)); SynchronizeComponents(); }
        }

        private bool _isLab;
        public bool IsLab
        {
            get { return _isLab; }
            set { _isLab = value; RaisePropertyChangedAuto(); }
        }


        private void SynchronizeColor()
        {
            _color_change_timer.Stop();

            if (SynchronizeColorSpaces)
            {
                if (!IsLab)
                {
                    Rgb rgb = new Rgb(Red, Green, Blue);
                    Lab lab = rgb.To<Lab>();
                    _l = lab.L;
                    _a = lab.A;
                    _b = lab.B;
                }
                else
                {
                    Lab lab = new Lab(L, A, B);
                    Rgb rgb = lab.To<Rgb>();
                    _red = (int)rgb.R;
                    _green = (int)rgb.G;
                    _blue = (int)rgb.B;
                }
            }

            _color = Color.FromRgb((byte)Red, (byte)Green, (byte)Blue);
            RaisePropertyChanged(nameof(Color));

            _color_change_timer.Start();
        }

        private void SynchronizeComponents()
        {
            _color_change_timer.Stop();

            _red = Color.R;
            _green = Color.G;
            _blue = Color.B;

            if (IsLab)
            {
                Rgb rgb = new Rgb(Red, Green, Blue);
                Lab lab = rgb.To<Lab>();
                _l = lab.L;
                _a = lab.A;
                _b = lab.B;
            }

            RaisePropertyChanged(nameof(Red));
            RaisePropertyChanged(nameof(Green));
            RaisePropertyChanged(nameof(Blue));
            RaisePropertyChanged(nameof(L));
            RaisePropertyChanged(nameof(A));
            RaisePropertyChanged(nameof(B));
            RaisePropertyChanged(nameof(Color));

            _color_change_timer.Start();
        }
    }
}