#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion


using Microsoft.AspNetCore.Mvc;
using System.ServiceModel.Security;
using System;
using Microsoft.AspNetCore.Http;
using HeuristicLab.Clients.Hive.WebJobManager.Services;
using HeuristicLab.Clients.Hive.WebJobManager.ViewModels;
using HeuristicLab.Clients.Hive.WebJobManager.Services.Imports;

namespace HeuristicLab.Clients.Hive.WebJobManager.Controllers
{
    /// <summary>
    /// Controller for initial landing page
    /// </summary>
    public class HomeController : Controller
    {
        private WebLoginService weblog;
        private HiveServiceClient client;
        public HomeController()
        {
            this.weblog = WebLoginService.Instance;
        }
        #region Login
        /// <summary>
        /// Opens initial home page
        /// </summary>
        /// <returns>View from home page</returns>
        public IActionResult Index()
        {
            ViewBag.Title = "Login";
            var user = HttpContext.Session.GetString("UserId");
            if (user != null && user != "")
            {
                Guid t = Guid.Parse(user);
                weblog.logout(t);
                HttpContext.Session.Clear();
            }
            return View(new LoginViewModel());

        }
        /// <summary>
        /// Checks login
        /// </summary>
        /// <param name="loginName">Login name</param>
        /// <param name="password">Login password</param>
        /// <returns>Logged in view if correct or shows error</returns>
        public IActionResult Login(string loginName, string password)//Checks login
        {
            if (!string.IsNullOrEmpty(loginName) && !string.IsNullOrEmpty(password))
            {
                var passE = Common.CryptoService.EncryptString(password);
                var model = new LoginViewModel(loginName, passE);
                HiveServiceLocatorWeb hiveServiceLocator = new HiveServiceLocatorWeb();
                Common.Properties.Settings.Default.UserName = loginName;
                Common.Properties.Settings.Default.Password = passE;
                Common.Properties.Settings.Default.Save();
                hiveServiceLocator.Username = loginName;
                hiveServiceLocator.Password = password;//Not encrypted for login to service
                hiveServiceLocator.UserId = model.userId;

                client = hiveServiceLocator.getHiveServiceClient();
                try
                {
                    var test = client.GetJobs();//Throws messageSecurityException if login failss
                    ViewBag.Title = "Login succesful";
                    weblog.newLogin(model, hiveServiceLocator);
                    HttpContext.Session.SetString("UserId", model.userId.ToString());
                    return RedirectToAction("Index", "Job");
                }
                catch (MessageSecurityException e)
                {
                    ViewBag.Title = "Login";
                    model = new LoginViewModel();
                    model.errorMessage = "Wrong login, try again";
                    return View("Index", model);
                }
                catch (SecurityAccessDeniedException e)
                {
                    var q = new QueryWebClient(model, password);
                    if (q.CheckLogin())
                    {
                        ViewBag.Title = "Login succesful";
                        weblog.newLoginOKBOnly(model,q, password);
                        HttpContext.Session.SetString("UserId", model.userId.ToString());
                        return RedirectToAction("Index", "Query");
                    }
                    else
                    {
                        ViewBag.Title = "Access denied - Login";
                        model = new LoginViewModel();
                        model.errorMessage = "Access denied, you have no permission to use this application." +
                            "              Contact a HeuristicLab Hive admin to gain access.";
                        return View("Index", model);
                    }

                }

            }
            else
            {
                ViewBag.Title = "Login";
                var model = new LoginViewModel();
                model.errorMessage = "You should fill in both fields";
                return View("Index", model);
            }
        }
        /// <summary>
        /// Redirect user to home sceen for a full logout
        /// </summary>
        /// <returns></returns>
        public IActionResult Logout()
        {
            return RedirectToAction("Index", "Home");
        }
        #endregion
    }
}