using System;
using System.Globalization;
using ShareeBike.Model.User.Account;
using Xamarin.Forms;

namespace ShareeBike.View.Settings
{

	/// <summary> 
	/// Translates user permissions into visibility state. 
	/// Used for container which holds a bunch of GUI elemets which migth all/ partly/ none be visible
	/// If all childs are invisible frame must be invisible as well. As soon as one child is visible frame must be visible as well.
	/// </summary>
	public class BackendPermissionsToVisibleConverter : IValueConverter
	{
		/// <summary> Converts permission value into visible state.</summary>
		/// <param name="value">Permission value from view model used to derive whether object is visible or not.</param>
		/// <returns>Boolean value indicating whether object is visible or not.</returns>
		public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
		{
			var enumValue = (Permissions)value;
			return enumValue.HasFlag(Permissions.PickCopriServer) | enumValue.HasFlag(Permissions.ManagePolling) | enumValue.HasFlag(Permissions.ManageCopriCacheExpiration);
		}

		public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
		{
			return Permissions.None;
		}
	}
}