using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Forms;
using System.Windows.Markup;
using System.Windows.Media;
using Telerik.Windows.Controls.ColorEditor;

namespace eDosStation
{
    public class Converters
    {
        static public readonly Color cBlack = System.Windows.Media.Colors.Black;
        static public readonly Color cGreen= System.Windows.Media.Colors.LightGreen;
        static public readonly Color cYellow = System.Windows.Media.Colors.Yellow;
        static public readonly Color cRed = System.Windows.Media.Colors.LightCoral;
        static public readonly Color cBlue = System.Windows.Media.Colors.LightBlue;
        static public readonly Color cGray = System.Windows.Media.Colors.Gray;

        static public readonly Brush cbBlack = new  SolidColorBrush(cBlack);
        static public readonly Brush cbGreen = new SolidColorBrush(cGreen);
        static public readonly Brush cbYellow = new SolidColorBrush(cYellow);
        static public readonly Brush cbRed =  new SolidColorBrush(cRed);
        static public readonly Brush cbBlue = new SolidColorBrush(cBlue);
        static public readonly Brush cbGray = new SolidColorBrush(cGray);


        public class BrushColorValueConverter : IValueConverter
        {
            public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
            {
                if (value == null) value = (int)0;
                int cv = (int)value;
                Brush rv ;
                switch (value) {
                    case 0: rv = cbBlack; break;
                    case 1: rv = cbGreen; break;
                    case 2: rv = cbYellow; break;
                    case 3: rv = cbRed; break;
                    case 4: rv = cbBlue; break;
                    default: rv = cbGray; break;
                }
                return rv;
            }

            public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
            {
                throw new NotImplementedException();
            }
        }

        public class BrushColorConverter : IValueConverter
        {
            public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
            {
                Brush rv = cbGreen;
                if (value == null || (bool?)value ==true ) rv = cbRed; 
                return rv; 
            }

            public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
            {
                throw new NotImplementedException();
            }
        }


        /// <summary>
        /// Date expiry and boolean OK
        /// </summary>
        public class BrushExpiryConverter : IValueConverter
        {
            public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
            {
                Brush rv = cbGreen;
                if (parameter != null 
                        && (    (parameter is bool && !(bool)parameter) 
                            ||  (parameter is int && (int)parameter==0)
                           )
                    )
                    rv = cbRed;
                else
                {
                    if (value != null && value is DateTime dt)
                    {
                        int weeksleft = (dt - DateTime.Today).Days / 7;
                        if (weeksleft > 2) rv = cbGreen;
                        else if (weeksleft > -1) rv = cbYellow;
                        else rv = cbRed;
                    }
                    else
                        rv = cbBlack;
                }
                return rv;
            }

            public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
            {
                throw new NotImplementedException();
            }
        }

       
    }
    public class AddConverter : MarkupExtension, IValueConverter
    {
        public double Value { get; set; }

        public object Convert(object baseValue, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            double val = System.Convert.ToDouble(baseValue);
            // Change here if you want other operations
            return val + Value;
        }

        public object ConvertBack(object baseValue, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return null;
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }
    }
}