using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
using Tango.Core.Commands;
using Tango.Core.DI;

namespace Tango.PPC.Common.Notifications
{
    /// <summary>
    /// Represents an app button that will be displayed in the layout view.
    /// </summary>
    /// <seealso cref="ExtendedObject" />
    public abstract class AppButton : ExtendedObject
    {
        /// <summary>
        /// Occurs when the button has been pressed.
        /// </summary>
        public event Action Pressed;

        private String _text;
        /// <summary>
        /// Gets or sets the text.
        /// </summary>
        public String Text
        {
            get { return _text; }
            set { _text = value; RaisePropertyChangedAuto(); }
        }

        private bool _isEnabled;
        /// <summary>
        /// Gets or sets a value indicating whether this instance is enabled.
        /// </summary>
        public bool IsEnabled
        {
            get { return _isEnabled; }
            set { _isEnabled = value; RaisePropertyChangedAuto(); }
        }

        private RelayCommand _command;
        /// <summary>
        /// Gets or sets the command.
        /// </summary>
        public RelayCommand Command
        {
            get { return _command; }
            set { _command = value; RaisePropertyChangedAuto(); }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="AppButton"/> class.
        /// </summary>
        public AppButton()
        {

        }

        /// <summary>
        /// Initializes a new instance of the <see cref="AppButton"/> class.
        /// </summary>
        /// <param name="text">The text.</param>
        /// <param name="isEnabled">if set to <c>true</c> [is enabled].</param>
        /// <param name="onExecute">The on execute.</param>
        /// <param name="canExecute">The can execute.</param>
        public AppButton(String text, bool isEnabled) : this()
        {
            Text = text;
            IsEnabled = isEnabled;
            Command = new RelayCommand(() =>
            {
                Pressed?.Invoke();
            });
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="AppButton"/> class.
        /// </summary>
        /// <param name="text">The text.</param>
        /// <param name="command">The command.</param>
        public AppButton(String text, RelayCommand command) : this(text, true)
        {
            Command = command;
        }

        /// <summary>
        /// Invalidates the button state.
        /// </summary>
        public void RaiseCanExecute()
        {
            Command.RaiseCanExecuteChanged();
        }

        /// <summary>
        /// Pops this instance.
        /// </summary>
        public void Pop()
        {
            TangoIOC.Default.GetInstance<INotificationProvider>().PopAppButton(this);
        }

        /// <summary>
        /// Pushes this instance.
        /// </summary>
        public void Push()
        {
            TangoIOC.Default.GetInstance<INotificationProvider>().PushAppButton(this);
        }
    }
}