using System;
using System.Collections.Generic;
using Chernobyl.Collections.Generic.Event;
using Chernobyl.Graphics;

namespace Chernobyl.Interface
{
    /// <summary>
    /// A delegate for handling methods that create interface views of some object.
    /// </summary>
    /// <param name="item">The item that the view will be representing.</param>
    /// <returns>The view that can be used to render the item.</returns>
    public delegate IDrawableTransformCollidable2D InterfaceFactory(object item);

    /// <summary>
    /// An interface for working with a services class that holds interface 
    /// factory collections.
    /// </summary>
    public interface IInterfaceFactoryCollectionServices : IEventCollection<object> { }

    /// <summary>
    /// The default implementation of the <see cref="IInterfaceFactoryCollectionServices"/>.
    /// </summary>
    public class InterfaceFactoryCollectionServices : DecoratingEventList<object>, IInterfaceFactoryCollectionServices {}

    /// <summary>
    /// An interface for working with collections of interface factories. 
    /// Interface factories are factories that create interfaces for a specific
    /// type. For example, an interface factory may exist to create an interface
    /// for a int or string or an IEnumerable. There are different types of 
    /// factories for different types of interfaces. For example, interface
    /// factories exist to create icons for different types or for creating 
    /// interfaces that fit in the cell of a table.
    /// </summary>
    public interface IInterfaceFactoryCollection : IDictionary<Type, InterfaceFactory> { }

    /// <summary>
    /// An interface for working with collections of interface factories that 
    /// create a "standard interface". These interfaces do not follow any 
    /// particular rules and are the default interfaces that are created when no
    /// rules can be applied to the interface. 
    /// </summary>
    public interface IStandardInterfaceFactoryCollection : IInterfaceFactoryCollection {}

    /// <summary>
    /// The default implementation of the <see cref="IStandardInterfaceFactoryCollection"/>
    /// interface.
    /// </summary>
    public class StandardInterfaceFactoryCollection : Dictionary<Type, InterfaceFactory>, IStandardInterfaceFactoryCollection { }

    /// <summary>
    /// An interface for working with collections of interface factories that 
    /// create icons that represent some type. 
    /// </summary>
    public interface IIconInterfaceFactoryCollection : IInterfaceFactoryCollection { }

    /// <summary>
    /// The default implementation of the <see cref="IStandardInterfaceFactoryCollection"/>
    /// interface.
    /// </summary>
    public class IconInterfaceFactoryCollection : Dictionary<Type, InterfaceFactory>, IIconInterfaceFactoryCollection { }
}