using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web.Mvc;
using Portoa.Validation.DataAnnotations;
using VideoGameQuotes.Api;

namespace VideoGameQuotes.Web.Models {

	public class EditQuoteModel {
		public EditQuoteModel() {
			ControllerName = "Quote";
			ActionName = "Submit";
		}

		public EditQuoteModel(Quote quote) : this() {
			QuoteId = quote.Id;
			Flags = quote.Flags.ToList();
			QuoteText = quote.Text;
			CategoryIds = quote.Categories.Select(category => category.Id).ToList();
			GameId = quote.Game.Id;
			ActionName = "Edit";
		}

		public string ActionName { get; set; }
		public string ControllerName { get; set; }

		public int QuoteId { get; set; }
		public List<QuoteFlag> Flags { get; set; }

		[Required(ErrorMessage = "Quote text must be non-empty, saddlebags")]
		[StringLength(1024, ErrorMessage = "Quote can't be longer than 1024 characters, slut")]
		[DisplayName("Quote")]
		public string QuoteText { get; set; }
		[DisplayName("Categories")]
		public IList<int> CategoryIds { get; set; }

		[GreaterThanZero(ErrorMessage = "Quit screwing with the form, faggle"), DisplayName("Game")]
		public int GameId { get; set; }

		public IEnumerable<Game> AllGames { get; set; }
		public IEnumerable<GamingSystem> AllSystems { get; set; }
		public IEnumerable<Publisher> AllPublishers { get; set; }
		public IEnumerable<Category> AllCategories { get; set; }

		public IEnumerable<SelectListItem> GetGameList() {
			return AllGames.Select(game => new SelectListItem { Value = game.Id.ToString(), Text = game.Name });
		}

		private static string MakeTable<T>(string tableId, int cellsPerRow, IEnumerable<T> items, Func<T, string> cellDataCallback) {
			var table = new TagBuilder("table");
			table.MergeAttribute("id", tableId);
			var count = 0;
			var row = new TagBuilder("tr");
			var cell = new TagBuilder("td");

			foreach (var item in items) {
				if (count % cellsPerRow == 0) {
					if (count > 0) {
						table.InnerHtml += row.ToString(TagRenderMode.Normal);
					}

					row.InnerHtml = string.Empty;
				}

				cell.InnerHtml = cellDataCallback(item);
				row.InnerHtml += cell.ToString(TagRenderMode.Normal);
				count++;
			}

			if (count > 0) {
				//last row
				table.InnerHtml += row.ToString(TagRenderMode.Normal);
			}

			return table.ToString(TagRenderMode.Normal);
		}

		public string MakePublisherTable(HtmlHelper<EditQuoteModel> html, int cellsPerRow = 8) {
			return MakeTable(
				"publisher-checkbox-table",
				cellsPerRow,
				AllPublishers,
				publisher => CreateCheckbox("PublisherIds", publisher.Id, "publisher_" + publisher.Id, publisher.Name)
			);
		}

		public string MakeSystemTable(HtmlHelper<EditQuoteModel> html, int cellsPerRow = 8) {
			return MakeTable(
				"system-checkbox-table",
				cellsPerRow,
				AllSystems,
				system => CreateCheckbox("SystemIds", system.Id, "system_" + system.Id, system.Abbreviation)
			);
		}

		public string MakeCategoryTable(HtmlHelper<EditQuoteModel> html, int cellsPerRow = 5) {
			var categoryIds = CategoryIds ?? new List<int>();
			return MakeTable(
				"category-checkbox-table",
				cellsPerRow,
				AllCategories,
				category => CreateCheckbox("CategoryIds", category.Id, "category_" + category.Id, category.Name, categoryIds.Contains(category.Id))
			);
		}

		public string MakeRegionTable(int cellsPerRow = 8) {
			return MakeTable(
				"region-checkbox-table",
				cellsPerRow,
				Enum.GetValues(typeof(Region)).Cast<Region>().Where(region => region != Region.Unknown),
				region => CreateCheckbox("GameRegions", region, "region_" + (int)region, region.ToString())
			);
		}

		private static string CreateCheckbox(string name, object value, string id, string labelText, bool isChecked = false) {
			return string.Format(
				"<input type=\"checkbox\" name=\"{0}\" value=\"{1}\" id=\"{2}\"{4}/><label for=\"{2}\">{3}</label>", 
				name, 
				value, 
				id, 
				labelText,
				isChecked ? " checked=\"checked\"" : ""
			);
		}
	}
}