using System.Collections.Immutable;
using Connected.Caching;
using Connected.Entities;
using Connected.Entities.Storage;
using Connected.Notifications.Events;
using Connected.ServiceModel;
using Connected.Services;

namespace Logistics.Documents.Receive;
internal sealed class ReceivePostingItemOps
{
	public sealed class Insert : ServiceFunction<InsertReceivePostingItemArgs, long>
	{
		public Insert(IStorageProvider storage, IEventService events, IReceivePostingDocumentService documents)
		{
			Storage = storage;
			Events = events;
			Documents = documents;
		}

		private IStorageProvider Storage { get; }
		private IEventService Events { get; }
		private IReceivePostingDocumentService Documents { get; }

		protected override async Task<long> OnInvoke()
		{
			return (await Storage.Open<ReceivePostingItem>().Update(Arguments.AsEntity<ReceivePostingItem>(State.New))).Id;
		}

		protected override async Task OnCommitted()
		{
			await Events.Enqueue(this, Documents, nameof(IReceivePostingDocumentService.ItemInserted), new PrimaryKeyArgs<long> { Id = Result });
		}
	}

	public sealed class Query : ServiceFunction<PrimaryKeyArgs<int>, ImmutableList<IReceivePostingItem>>
	{
		public Query(IStorageProvider storage)
		{
			Storage = storage;
		}

		private IStorageProvider Storage { get; }

		protected override async Task<ImmutableList<IReceivePostingItem>> OnInvoke()
		{
			return await (from e in Storage.Open<ReceivePostingItem>() where e.Document == Arguments.Id select e).AsEntities<IReceivePostingItem>();
		}
	}

	public sealed class Select : NullableServiceFunction<PrimaryKeyArgs<long>, IReceivePostingItem>
	{
		public Select(IStorageProvider storage, ICacheContext cache)
		{
			Storage = storage;
			Cache = cache;
		}

		private IStorageProvider Storage { get; }
		private ICacheContext Cache { get; }

		protected override async Task<IReceivePostingItem?> OnInvoke()
		{
			return await Cache.Get(ReceivePostingItem.EntityKey, Arguments.Id, async (f) =>
			{
				return await (from e in Storage.Open<ReceivePostingItem>() where e.Id == Arguments.Id select e).AsEntity();
			});
		}
	}
}