using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using Tango.Core.Commands;

namespace Tango.Editors
{
    /// <summary>
    /// Represents abstract user control with some additional features.
    /// </summary>
    /// <seealso cref="System.Windows.Controls.UserControl" />
    /// <seealso cref="System.ComponentModel.INotifyPropertyChanged" />
    public class HybridControl : UserControl, INotifyPropertyChanged
    {
        /// <summary>
        /// Raises the property changed event.
        /// </summary>
        /// <param name="propName">Name of the property.</param>
        protected virtual void RaisePropertyChanged(String propName)
        {
            if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propName));
        }

        /// <summary>
        /// Raises all relay commands CanExecute methods in the current instance.
        /// </summary>
        public virtual void InvalidateRelayCommands()
        {
            this.Dispatcher.BeginInvoke(new Action(() =>
            {
                foreach (var prop in this.GetType().GetProperties().Where(x => x.PropertyType == typeof(RelayCommand)))
                {
                    var value = prop.GetValue(this) as RelayCommand;

                    if (value != null)
                    {
                        value.RaiseCanExecuteChanged();
                    }
                }
            }));
        }

        /// <exclude/>
        /// <summary> 
        /// Cast the instance of a dependency object to type T.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="d">The d.</param>
        /// <returns></returns>
        public static T GetInstance<T>(DependencyObject d) where T : DependencyObject
        {
            return d as T;
        }

        /// <summary>
        /// Occurs when a property value has changed.
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;
    }
}