using System.Collections.Generic;
using System.Collections.ObjectModel;
using Autofac;
using Chernobyl.App.Core;
using Chernobyl.Creation;
using Chernobyl.Creation.Collections;
using Chernobyl.Dependency.Autofac;

namespace Chernobyl.App.Layout
{
    /// <summary>
    /// Injects the layout services.
    /// </summary>
    public class Module : Autofac.Module
    {
        /// <inheritdoc />
        protected override void Load(ContainerBuilder builder)
        {
            builder.BindTemplateResourceAuto();

            // The collection of tools that is displayed in the toolbar.
            builder.Register(synt => new ObservableCollection<Content>())
                .As<IEnumerable<Content>, ICollection<Content>, ObservableCollection<Content>>()
                .SingleInstance();

            // TODO: this code forces the factories (and the content list) to be created. We just
            // want factories that already exist. consider using domain events to handle this instead
            // https://stackoverflow.com/questions/5629676/using-autofac-with-domain-events
            builder.BindPlugin<ContentWarehouse>();
        }
    }

    /// <summary>
    /// Listens for creation of <see cref="Content"/> through <see cref="IBuilder{T}"/> instances
    /// and stores the created <see cref="Content"/> in <see cref="ObservableCollection{Content}"/>.
    /// </summary>
    public class ContentWarehouse : Warehouse<Content>
    {
        /// <param name="content">The list of content that has already been created.</param>
        /// <param name="contentFactories">The instances that create the content.</param>
        public ContentWarehouse(ObservableCollection<Content> content, IEnumerable<IBuilder<Content>> contentFactories)
            : base(new BuilderComposite<Content>(contentFactories), content)
        {}
    }
}