using System.Web;
using Portoa.Web.Session;
using VideoGameQuotes.Api;
using VideoGameQuotes.Api.Persistence;

namespace VideoGameQuotes.Web.Security {
	public class UserProvider : ICurrentUserProvider {
		private readonly IUserService userService;
		private readonly ISessionStore sessionStore;
		private readonly HttpContextBase httpContext;

		public UserProvider(IUserService userService, ISessionStore sessionStore, HttpContextBase httpContext) {
			this.userService = userService;
			this.sessionStore = sessionStore;
			this.httpContext = httpContext;
		}

		public User CurrentUser {
			get {
				var user = sessionStore["user"] as User;

				if (user == null) {
					//identify user by IP address
					var username = httpContext.Request.UserHostAddress;
					if (string.IsNullOrEmpty(username)) {
						return null;
					}

					user = userService.FindByUsername(username);
					if (user == null) {
						user = new User {
							Username = username,
							Group = UserGroup.User
						};

						user = userService.Save(user);
					}

					sessionStore["user"] = user;
				}

				return user;
			}
		}
	}
}