using System;
using System.Linq;
using System.Net;
using System.Web.Mvc;
using Portoa.Persistence;
using Portoa.Search;
using Portoa.Validation.DataAnnotations;
using Portoa.Web.Controllers;
using Portoa.Web.Filters;
using Portoa.Web.Models;
using Portoa.Web.Results;
using Portoa.Web.Security;
using VideoGameQuotes.Api;
using VideoGameQuotes.Web.Models;
using VideoGameQuotes.Web.Security;
using VideoGameQuotes.Web.Services;

namespace VideoGameQuotes.Web.Controllers {
	public class QuoteController : Controller {
		private readonly IQuoteService quoteService;
		private readonly ICurrentUserProvider<User> currentUserProvider;
		private readonly ISearcher<Quote, int> quoteSearcher;

		public QuoteController(IQuoteService quoteService, ICurrentUserProvider<User> currentUserProvider, ISearcher<Quote, int> quoteSearcher) {
			this.quoteService = quoteService;
			this.currentUserProvider = currentUserProvider;
			this.quoteSearcher = quoteSearcher;
		}

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

		[HttpPost, VerifyUser(Group = UserGroup.Admin)]
		public ActionResult Delete(int id) {
			try {
				quoteService.Delete(id);
				return Json(this.CreateJsonResponse());
			} catch (Exception e) {
				return Json(this.CreateJsonErrorResponse(e));
			}
		}

		public ActionResult Browse(BrowseModel model, int page = 1) {
			if (page < 1) {
				return new StatusOverrideResult(View("BadPaging")) { StatusCode = HttpStatusCode.BadRequest };
			}

			if (model.IsEmpty) {
				return View("DefaultBrowse", quoteService.GetDefaultBrowseModel());
			}

			model.CurrentUser = currentUserProvider.CurrentUser;
			var pagingModel = new PagedModel<Quote> {
				CurrentPage = page,
				PageSize = 10
			};

			int totalCount;
			var quotes = quoteService.GetBrowsableQuotes(model, pagingModel.Start, pagingModel.End, out totalCount);
			pagingModel.Records = quotes;
			pagingModel.TotalCount = totalCount;

			return View("QualifiedBrowse", new QualifiedBrowseModel(model) { PagedModel = pagingModel });
		}

		[HttpPost, VerifyUser]
		public ActionResult Flag(ReportModel model) {
			if (!ModelState.IsValid) {
				return Json(this.CreateJsonErrorResponse("Invalid request"));
			}

			try {
				var quote = quoteService.GetQuote(model.QuoteId);
				quote.AddFlag(model.Comment, model.FlagType, currentUserProvider.CurrentUser);
				quoteService.SaveQuote(quote);
				return Json(this.CreateJsonResponse());
			} catch {
				return Json(this.CreateJsonErrorResponse("Unable to create your report"));
			}
		}

		[HttpPost, VerifyUser]
		public ActionResult Vote(VoteModel model) {
			if (!ModelState.IsValid) {
				return Json(this.CreateJsonErrorResponse("Invalid request"));
			}

			try {
				var quote = quoteService.SaveQuote(quoteService.GetQuote(model.QuoteId).VoteFor(currentUserProvider.CurrentUser, model.Direction));

				var data = new {
					score = quote.Score,
					upVotes = quote.UpVotes,
					downVotes = quote.DownVotes
				};

				return Json(this.CreateJsonResponse(null, data));
			} catch (CannotVoteTwiceException) {
				return Json(this.CreateJsonErrorResponse("You have already voted for this quote; you can reverse your vote by voting in the other direction"));
			} catch {
				return Json(this.CreateJsonErrorResponse("An error occurred while trying to process your vote"));
			}
		}

		public ActionResult Recent(int page) {
			if (page < 1) {
				return new StatusOverrideResult(View("BadPaging")) { StatusCode = HttpStatusCode.BadRequest };
			}

			const int pageSize = 10;
			int totalCount;
			var model = new PagedModelWithUser<Quote> {
				CurrentUser = currentUserProvider.CurrentUser,
				CurrentPage = page,
				PageSize = pageSize
			};

			model.Records = quoteService.GetRecentQuotes(model.Start, model.End, out totalCount);
			model.TotalCount = totalCount;

			return View(model);
		}

		public ActionResult Best(int page) {
			if (page < 1) {
				return new StatusOverrideResult(View("BadPaging")) { StatusCode = HttpStatusCode.BadRequest };
			}

			const int pageSize = 10;
			int totalCount;
			var model = new PagedModelWithUser<Quote> {
				CurrentUser = currentUserProvider.CurrentUser,
				CurrentPage = page,
				PageSize = pageSize
			};

			model.Records = quoteService.GetBestQuotes(model.Start, model.End, out totalCount);
			model.TotalCount = totalCount;

			return View(model);
		}

		public ActionResult Random() {
			var quote = quoteService.GetRandomQuote();
			if (quote == null) {
				return View("NoQuotes");
			}

			return RedirectToAction("Quote", new { id = quote.Id, text = quote.GetUrlFriendlyText() });
		}

		[PrivateAction]
		public ActionResult QuoteOfTheDay() {
			var today = DateTime.UtcNow.DayOfYear;
			var quote = quoteService.GetQuoteForDayOfYear(today);
			return PartialView("QuoteOfTheDay", quote);
		}

		[HttpPost, VerifyUser(Group = UserGroup.Admin)]
		public ActionResult DismissFlag([GreaterThanZero]int quoteId, [GreaterThanZero]int flagId) {
			if (!ModelState.IsValid) {
				return Json(this.CreateJsonErrorResponse("quote/flag is invalid"));
			}

			try {
				var quote = quoteService.GetQuote(quoteId);
				var flag = quote.Flags.FirstOrDefault(f => f.Id == flagId);
				if (flag == null) {
					return Json(this.CreateJsonErrorResponse(string.Format("Flag {0} not found for quote {1}", flagId, quote.Id)));
				}

				quote.RemoveFlag(flag);
				quoteService.SaveQuote(quote);
				return Json(this.CreateJsonResponse());
			} catch (Exception e) {
				return Json(this.CreateJsonErrorResponse(e));
			}
		}

		[HttpGet, VerifyUser(Group = UserGroup.Admin)]
		public ActionResult Edit(int id) {
			if (id < 1) {
				return View("QuoteNotFound");
			}

			try {
				return View(ResetEditQuoteModel(new EditQuoteModel(quoteService.GetQuote(id))));
			} catch (EntityNotFoundException) {
				return View("QuoteNotFound");
			}
		}

		[HttpPost, VerifyUser(Group = UserGroup.Admin)]
		public ActionResult Edit(EditQuoteModel model) {
			return CreateOrEditQuote(model, "Edit");
		}

		[VerifyUser]
		public ActionResult Submit() {
			return View(ResetEditQuoteModel(new SubmitQuoteModel()));
		}

		[HttpPost, VerifyUser]
		public ActionResult Submit(SubmitQuoteModel model) {
			if (CaptchaUtil.Hash(model.CaptchaAnswer) != model.HashedCaptchaAnswer) {
				ModelState.AddModelError("CaptchaAnswer", "You are not human");
			}

			return CreateOrEditQuote(model, "Submit");
		}

		private ActionResult CreateOrEditQuote(EditQuoteModelBase model, string viewName) {
			if (!ModelState.IsValid) {
				model = ResetEditQuoteModel(model);
				return View(viewName, model);
			}

			try {
				var editModel = model as EditQuoteModel;

				var quote = editModel != null && editModel.QuoteId > 0
					? quoteService.GetQuote(editModel.QuoteId)
					: new Quote { Creator = currentUserProvider.CurrentUser };

				quote.Game = new Game { Id = model.GameId };
				quote.Text = model.QuoteText;

				if (model.CategoryIds != null && model.CategoryIds.Count > 0) {
					quote.ClearCategories();
					foreach (var categoryId in model.CategoryIds) {
						quote.AddCategory(new Category { Id = categoryId });
					}
				}

				if (quote.Game == null) {
					return View(viewName, ResetEditQuoteModel(model));
				}

				quote = quoteService.SaveQuote(quote);

				return RedirectToAction("Quote", new { id = quote.Id, text = quote.GetUrlFriendlyText() });
			} catch (Exception e) {
				ModelState.AddModelError("save", e.Message);
				return View(viewName, ResetEditQuoteModel(model));
			}
		}

		private EditQuoteModelBase ResetEditQuoteModel(EditQuoteModelBase model) {
			model.CurrentUser = currentUserProvider.CurrentUser;
			model.AllGames = quoteService.GetAllGames().OrderBy(game => game.Name);
			model.AllSystems = quoteService.GetAllSystems().OrderBy(system => system.ReleaseDate);
			model.AllPublishers = quoteService.GetAllPublishers().OrderBy(publisher => publisher.Name);
			model.AllCategories = quoteService.GetAllCategories().OrderBy(category => category.Name);

			var submitModel = model as SubmitQuoteModel;
			if (submitModel != null) {
				submitModel.UnhashedCaptchaAnswer = CaptchaUtil.GetRandomAnswer();
				submitModel.HashedCaptchaAnswer = CaptchaUtil.Hash(submitModel.UnhashedCaptchaAnswer);
				submitModel.CaptchaAnswer = null;
				return submitModel;
			}

			return model;
		}

		public ActionResult Quote(int id, string text = null) {
			try {
				var model = new QuoteModel {
					Quote = quoteService.GetQuote(id),
					User = currentUserProvider.CurrentUser
				};

				return View(model);
			} catch (EntityNotFoundException) {
				return new StatusOverrideResult(View("QuoteNotFound")) { StatusCode = HttpStatusCode.NotFound };
			}
		}

		[VerifyUser(Group = UserGroup.Admin)]
		public ActionResult Flags(int id) {
			try {
				var model = new QuoteModel {
					Quote = quoteService.GetQuote(id),
					User = currentUserProvider.CurrentUser
				};

				return View(model);
			} catch (EntityNotFoundException) {
				return new StatusOverrideResult(View("QuoteNotFound")) { StatusCode = HttpStatusCode.NotFound };
			}
		}

		public ActionResult Search(string searchQuery) {
			var model = new SearchModel {
				User = currentUserProvider.CurrentUser,
				Results = quoteSearcher.Search(searchQuery),
				SearchQuery = searchQuery
			};

			return View(model);
		}
	}
}