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

namespace TINK.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;
        }
    }
}