using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace Tango.Settings
{
    /// <summary>
    /// Represents a settings object base class.
    /// </summary>
    public abstract class SettingsBase : INotifyPropertyChanged
    {
        internal Action SaveAction { get; set; }

        /// <summary>
        /// Saves settings.
        /// </summary>
        /// <exception cref="System.InvalidOperationException">This settings instance is not registered with any settings manager.</exception>
        public virtual void Save()
        {
            if (SaveAction == null)
            {
                throw new InvalidOperationException("This settings instance is not registered with any settings manager.");
            }

            SaveAction();
        }

        /// <summary>
        /// Occurs when a property value changes.
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        /// Raises the property changed event.
        /// </summary>
        /// <param name="propName">Name of the property.</param>
        protected virtual void RaisePropertyChanged(String propName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propName));
        }

        /// <summary>
        /// Raises the property changed event.
        /// </summary>
        /// <param name="propName">Name of the property.</param>
        protected virtual void RaisePropertyChangedAuto([CallerMemberName] string caller = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(caller));
        }
    }
}