using RealTimeGraphX.EventArguments;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RealTimeGraphX
{
    /// <summary>
    /// Represents a graph component which can receive data from another type of component.
    /// </summary>
    /// <typeparam name="TIn">The type of the in.</typeparam>
    /// <seealso cref="RealTimeGraphX.IGraphComponent" />
    public interface IGraphInputComponent<TIn> : IGraphComponent where TIn : IGraphComponent
    {
        /// <summary>
        /// Occurs when the <see cref="Input"/> property has changed.
        /// </summary>
        event EventHandler<InputChangedEventArgs<TIn>> InputChanged;

        /// <summary>
        /// Gets the connected input <see cref="IGraphComponent"/>.
        /// </summary>
        TIn Input { get; }

        /// <summary>
        /// Connects the specified component output to this component input.
        /// </summary>
        /// <param name="component">The component.</param>
        /// <param name="fromInput">Specifies whether this call was made from a <see cref="TIn"/> component.</param>
        void ConnectInput(TIn component, bool fromInput = false);

        /// <summary>
        /// Disconnects this component input from the current connected <see cref="Input"/> <see cref="IGraphComponent"/>.
        /// </summary>
        /// <param name="fromInput">Specifies whether this call was made from a <see cref="TIn"/> component.</param>
        void DisconnectInput(bool fromInput = false);
    }
}