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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;
namespace MaterialDesignThemes.Wpf.Converters
{
internal class ClockItemIsCheckedConverter : IValueConverter
{
private readonly Func<DateTime> _currentTimeGetter;
private readonly ClockDisplayMode _displayMode;
private readonly bool _is24Hours;
public ClockItemIsCheckedConverter(Func<DateTime> currentTimeGetter, ClockDisplayMode displayMode, bool is24Hours)
{
if (currentTimeGetter == null) throw new ArgumentNullException(nameof(currentTimeGetter));
_currentTimeGetter = currentTimeGetter;
_displayMode = displayMode;
_is24Hours = is24Hours;
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var dateTime = (DateTime) value;
var i = (int) parameter;
return (_displayMode == ClockDisplayMode.Hours ? MassageHour(dateTime.Hour, _is24Hours) : MassageMinute(dateTime.Minute)) == i;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if ((bool)value != true) return Binding.DoNothing;
var currentTime = _currentTimeGetter();
return new DateTime(
currentTime.Year, currentTime.Month, currentTime.Day,
(_displayMode == ClockDisplayMode.Hours) ? ReverseMassageHour((int)parameter, currentTime, _is24Hours) : currentTime.Hour,
(_displayMode == ClockDisplayMode.Minutes) ? ReverseMassageMinute((int)parameter) : currentTime.Minute,
currentTime.Second);
}
private static int MassageHour(int val, bool is24Hours)
{
if (is24Hours)
{
return val == 0 ? 24 : val;
}
if (val == 0) return 12;
if (val > 12) return val - 12;
return val;
}
private static int MassageMinute(int val)
{
return val == 0 ? 60 : val;
}
private static int ReverseMassageHour(int val, DateTime currentTime, bool is24Hours)
{
if (is24Hours)
{
return val == 24 ? 0 : val;
}
return currentTime.Hour < 12
? (val == 12 ? 0 : val)
: (val == 12 ? 12 : val + 12);
}
private static int ReverseMassageMinute(int val)
{
return val == 60 ? 0 : val;
}
}
}
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