using System.Linq;
using System.Web.Mvc;
using Portoa.Persistence;
using Portoa.Util;
using Portoa.Web.Controllers;
using VideoGameQuotes.Api;
using VideoGameQuotes.Web.Models;
using VideoGameQuotes.Web.Security;
using VideoGameQuotes.Web.Services;

namespace VideoGameQuotes.Web.Controllers {
	public class PublisherController : Controller {
		private readonly IPublisherService publisherService;

		public PublisherController(IPublisherService publisherService) {
			this.publisherService = publisherService;
		}

		protected new ActionResult Json(object data) {
			return this.SerializeToJson(data);
		}

		[HttpPost, VerifyUser(Group = UserGroup.Admin)]
		public ActionResult Delete(int id) {
			if (id < 1) {
				return Json(this.CreateJsonResponse("Invalid ID"));
			}

			try {
				var publisher = publisherService.FindById(id);
				var games = publisherService.GetGamesForPublisher(publisher);
				if (games.Any()) {
					return Json(this.CreateJsonErrorResponse(
						string.Format("The following games are still using this publisher: {0}", games.Implode(game => game.Name, ", "))
					));
				}
			} catch (EntityNotFoundException) {
				return Json(this.CreateJsonErrorResponse("No publisher exists for ID " + id));
			}

			publisherService.Delete(id);
			return Json(this.CreateJsonResponse());
		}

		[HttpPost, VerifyUser(Group = UserGroup.Admin)]
		public ActionResult Edit(EditPublisherModel model) {
			if (model.PublisherId < 1) {
				ModelState.AddModelError("PublisherId", "Invalid publisher ID");
			}

			if (!ModelState.IsValid) {
				return Json(this.CreateJsonErrorResponse("Some errors occurred"));
			}

			var publisher = publisherService.FindById(model.PublisherId);
			publisher.Name = model.PublisherName;
			publisher.Website = model.PublisherWebsite;

			publisher = publisherService.Save(publisher);
			return Json(this.CreateJsonResponse(data: publisher.ToDto()));
		}

		[HttpPost, VerifyUser]
		public ActionResult Create(EditPublisherModel model) {
			if (!ModelState.IsValid) {
				return Json(this.CreateJsonErrorResponse("Some errors occurred."));
			}

			if (publisherService.FindByName(model.PublisherName) != null) {
				return Json(this.CreateJsonResponse("A publisher with that name already exists."));
			}

			var publisher = publisherService.Save(new Publisher { Name = model.PublisherName, Website = model.PublisherWebsite });
			return Json(this.CreateJsonResponse(data: publisher.ToDto()));
		}
	}
}