using System;
using System.Collections.Generic;
using System.Linq;
using JetBrains.Annotations;
using Portoa.Persistence;
using VideoGameQuotes.Api;

namespace VideoGameQuotes.Web.Services {

	public interface IPublisherService {
		[CanBeNull]
		Publisher FindByName(string name);
		Publisher Save(Publisher publisher);
		IEnumerable<Game> GetGamesForPublisher(Publisher publisher);
		Publisher FindById(int id);
		void Delete(int id);
	}

	public class PublisherService : IPublisherService {
		private readonly IRepository<Publisher> repository;
		private readonly IRepository<Game> gameRepository;

		public PublisherService(IRepository<Publisher> repository, IRepository<Game> gameRepository) {
			this.repository = repository;
			this.gameRepository = gameRepository;
		}

		[UnitOfWork]
		public Publisher FindByName(string name) {
			return repository.Records.FirstOrDefault(publisher => publisher.Name == name);
		}

		[UnitOfWork]
		public Publisher Save(Publisher publisher) {
			return repository.Save(publisher);
		}

		[UnitOfWork]
		public IEnumerable<Game> GetGamesForPublisher(Publisher publisher) {
			return gameRepository
				.Records
				.Where(game => game.Publishers.Contains(publisher));
		}

		[UnitOfWork]
		public Publisher FindById(int id) {
			return repository.FindById(id);
		}

		[UnitOfWork]
		public void Delete(int id) {
			repository.Delete(id);
		}
	}
}