using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Sarand.Core.Base;
using Sarand.Core.Security;
using Sarand.OperationsMgr.Core.App;
using Sarand.OperationsMgr.Web.App;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Sarand.OperationsMgr.Web.Controllers
{
	//=======================================================================
	public class HomeController : Controller_Base
	{
		//-------------------------------------------------------------------
		// Construction.
		public HomeController (OpnLocaliser localiser) : base(localiser)
		{
		}

		//-------------------------------------------------------------------
		// Home - Index.
		public IActionResult Index (Models.Model_Home_Index model)
		{
			Logger.Debug(GetType().Name + ".Index");
			if (HttpContext.Session != null)
			{
				foreach (var sessionKey in HttpContext.Session.Keys)
				{
					Logger.Debug(GetType().Name + ".Index Session key: " + sessionKey);
				}
			}

			// Actions.
			if (model.FormAction.EqualsCI(Localiser.GetText("form.action.login")))
			{
				// Validate login properties.
				if (StringUtil.IsEmpty(model.UserCode))
					model.AddWarningMessage(Localiser.GetHtmlText("msg.warn.login.userCode.missing"));

				// Retrieve session context.
				OpnSessionContext sessionContext = null;
				if (model.OK)
				{
					sessionContext = GetSessionContext(model.InstanceIdx);
					if (sessionContext == null)
					{
						model.AddWarningMessage(Localiser.GetHtmlText("msg.warn.sessionContext.unknown"));
					}
				}

				// Retrieve security console.
				SaSecurityConsole securityConsole = null;
				if (model.OK)
				{
					securityConsole = OpnGlobals.ConsoleHelper.GetSecurityConsole(sessionContext);
					if (securityConsole == null)
						model.AddWarningMessage(Localiser.GetHtmlText("msg.warn.securityConsole.unavailable"));
				}

				// Retrieve and validate user.
				SaSecurityItem secItemUser = null;
				if (model.OK)
				{
					secItemUser = securityConsole.GetUserByCode(model.UserCode);
					if (secItemUser == null)
						model.AddWarningMessage(Localiser.GetHtmlText("msg.warn.login.credentials.invalid"));
				}
				// Start user session.
				if (model.OK)
				{
					if (OpenUserSession(sessionContext, secItemUser.Id, secItemUser.Code, secItemUser.Description))
						Logger.Info("User logged in: " + secItemUser.Description + ". Instance: " + sessionContext.InstanceCode);
				}
			}
			else if (model.FormAction.EqualsCI(Localiser.GetText("form.action.logout")))
			{
				// Make a note of the session index for the login form.
				model.InstanceIdx = model.SessionIdx;

				// Clear user session.
				// NB Session Data may not be available, eg. if session has timed out.
				if (SessionData != null)
				{
					String userName = SessionData.User.Name;
					String instanceCode = OpnSystem.GetInstanceCode(SessionData.Instance);
					Logger.Info("User logging out: " + userName + ". Instance: " + instanceCode);
				}
				else Logger.Warn("User logging out - session has expired.");
				CloseUserSession();
			}
			else if (model.SessionExpired != null)
				model.AddWarningMessage(Localiser.GetHtmlText("msg.warn.session.expired"));

			return View(model);
		}

		//-------------------------------------------------------------------
		public IActionResult Error ()
		{
			return View();
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}