using Org.BouncyCastle.Asn1.IsisMtt;
using Sarand.BusinessMgr.Net.Standard.Base.Bus;
using Sarand.BusinessMgr.Net.Standard.Base.Core;
using Sarand.BusinessMgr.Net.Standard.Base.Mgr;
using Sarand.Net.Standard.Base.App;
using Sarand.Net.Standard.Base.Bus;
using Sarand.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Utils;
using System;
using System.Collections.Generic;
using System.Xml.Linq;

namespace Sarand.BusinessMgr.Net.Standard.Base.App
{
	//=======================================================================
	public class SbmSysParamCache : SacsDisposable
	{
		//-------------------------------------------------------------------
		// Definitions.
		public enum ParamName
		{
			/// <summary>User's selected organisation.</summary>
			SelectedCompany,
			SelectedOwner = SelectedCompany,
			DefaultView,
			ApplicationSize,
			LeftPanelWidth,
			SelectedAssociation,
			SelectedTransaction,
			SelectedPortfolio,
			SelectedPortfolioItem,
			SelectedCommodity,
			AssocMaintTab,
		}
		public static String ParamName_SelectedCompany = "SelectedCompany";
		public static String ParamName_DefaultView = "DefaultView";
		public static String ParamName_ApplicationSize = "AppSize";
		public static String ParamName_LeftPanelWidth = "LeftPanelWidth";
		public static String ParamName_SelectedAssociation = "SelectedAssociation";
		public static String ParamName_SelectedTransaction = "SelectedTransaction";
		public static String ParamName_SelectedPortfolio = "SelectedPortfolio";
		public static String ParamName_SelectedPortfolioItem = "SelectedPortfolioItem";
		public static String ParamName_SelectedCommodity = "SelectedCommodity";
		public static String ParamName_AssocMaintTab = "AssocMaintTab";

		//-------------------------------------------------------------------
		// Data members.
		protected readonly List<SbmSysParam> userSysParams = new List<SbmSysParam>();

		//-------------------------------------------------------------------
		// Construction.
		public SbmSysParamCache(ISbmUserOrganisationContext userContext, SysId affiliateIdUser)
		{
			this.UserContext = userContext;
			this.AffiliateIdUser = affiliateIdUser;
		}

		protected override void Dispose(bool disposing)
		{
			if (disposing)
			{
			}
		}

		//-------------------------------------------------------------------
		// Properties.
		public ISbmUserOrganisationContext UserContext { get; }
		public SysId AffiliateIdUser { get; }
		public bool Modified { get; private set; }

		//-------------------------------------------------------------------
		// Utilities.
		public static String GetParamName(ParamName paramName)
		{
			switch (paramName)
			{
				case ParamName.SelectedCompany:
					return ParamName_SelectedCompany;
				case ParamName.DefaultView:
					return ParamName_DefaultView;
				case ParamName.ApplicationSize:
					return ParamName_ApplicationSize;
				case ParamName.LeftPanelWidth:
					return ParamName_LeftPanelWidth;
				case ParamName.SelectedAssociation:
					return ParamName_SelectedAssociation;
				case ParamName.SelectedTransaction:
					return ParamName_SelectedTransaction;
				case ParamName.SelectedPortfolio:
					return ParamName_SelectedPortfolio;
				case ParamName.SelectedPortfolioItem:
					return ParamName_SelectedPortfolioItem;
				case ParamName.SelectedCommodity:
					return ParamName_SelectedCommodity;
				case ParamName.AssocMaintTab:
					return ParamName_AssocMaintTab;
			}
			return "";
		}

		//-------------------------------------------------------------------

		/// <summary>Retrieve the value for the user parameter.</summary>
		public String GetUserParamValue(ParamName paramName, SysId affiliateIdTarget = null, SysId associationId = null)
		{
			return GetUserParamValue(GetParamName(paramName), affiliateIdTarget, associationId);
		}

		/// <summary>Retrieve the value for the user parameter.</summary>
		public String GetUserParamValue(String name, SysId affiliateIdTarget = null, SysId associationId = null)
		{
			if (!SysId.IsValid(AffiliateIdUser)) return "";
			return GetParam(name, affiliateIdTarget, associationId)?.Value ?? "";
		}

		//-------------------------------------------------------------------

		/// <summary>Store value against user parameter.</summary>
		public bool SetUserParamValue(ParamName paramName, String value, SysId affiliateIdTarget = null, SysId associationId = null)
		{
			return SetUserParamValue(GetParamName(paramName), value, affiliateIdTarget, associationId);
		}

		/// <summary>Store value against user parameter.</summary>
		public bool SetUserParamValue(String name, String value, SysId affiliateIdTarget = null, SysId associationId = null)
		{
			bool success = false;
			if (!SysId.IsValid(AffiliateIdUser)) return false;
			SbmSysParam sysParam = GetParam(name, affiliateIdTarget, associationId);
			if (sysParam != null)
			{
				if (!sysParam.Value.Equals(value))
				{
					// Update the value.
					sysParam.Value = value;
					Modified = true;
				}
				success = true;
			}
			return success;
		}

		//-------------------------------------------------------------------
		/// <summary>Extract parameter from the cache list.</summary>
		private SbmSysParam FindParam(String name, SysId affiliateIdTarget = null, SysId associationId = null)
		{
			return userSysParams.Find
				(item => item.Category == Sbm.SysParamCategory.UserParam &&
				item.Name.EqualsCI(name) &&
				item.AffiliateIdOwner.Equals(AffiliateIdUser) &&
				SysId.ToInt(item.AffiliateIdTarget) == SysId.ToInt(affiliateIdTarget) &&
				SysId.ToInt(item.AssociationId) == SysId.ToInt(associationId));
		}
		/// <summary>Extract parameter from the cache list or retrieve from database if not present.</summary>
		private SbmSysParam GetParam(String name, SysId affiliateIdTarget = null, SysId associationId = null)
		{
			SbmSysParam sysParam = FindParam(name, affiliateIdTarget, associationId);
			if (sysParam == null)
			{
				using (SbmAccountMgr accountMgr = CreateAccountMgr())
				{
					// Retrieve a matching parameter from the database.
					sysParam = accountMgr.GetSysParam(Sbm.SysParamCategory.UserParam, name, AffiliateIdUser, affiliateIdTarget, associationId);
					if (sysParam == null)
					{
						// Parameter not found - create a new one.
						sysParam = accountMgr.CreateSysParam(Sbm.SysParamCategory.UserParam, name);
						if (sysParam != null)
						{
							sysParam.AffiliateIdOwner = AffiliateIdUser;
							sysParam.AffiliateIdTarget = affiliateIdTarget;
							sysParam.AssociationId = associationId;
						}
					}
					if (sysParam != null)
					{
						// Store parameter in the cache list.
						userSysParams.Add(sysParam);
					}
				}
			}
			return sysParam;
		}

		//-------------------------------------------------------------------
		/// <summary>Store the params cached for the current user.</summary>
		public bool Store()
		{
			bool success = true;
			using (SbmAccountMgr accountMgr = CreateAccountMgr())
			{
				foreach (SbmSysParam sysParam in userSysParams)
				{
					if (!SysId.IsValid(sysParam.Id))
					{
						// Parameter doesn't yet have a valid Id - create a new one.
						if (!accountMgr.InsertSysParam(sysParam, UserContext.DbUpdateInfo))
						{
							success = false;
							SaLogger.Warn($"{SysUtil.Fn} Failed to add parameter - {accountMgr.ErrorStateMessage}");
						}
					}
					else
					{
						// Parameter already has a valid Id - update it.
						if (!accountMgr.UpdateSysParam(sysParam, UserContext.DbUpdateInfo))
						{
							success = false;
							SaLogger.Warn($"{SysUtil.Fn} Failed to update parameter - {accountMgr.ErrorStateMessage}");
						}
					}
				}
			}
			if (success) Modified = false;
			return success;
		}

		//-------------------------------------------------------------------
		/// <summary>Clear the params cached for the current user.</summary>
		public void Clear()
		{
			ListUtil.ClearAndDispose(userSysParams);
			Modified = false;
		}

		//-------------------------------------------------------------------
		// Data managers.
		protected SbmAccountMgr CreateAccountMgr()
		{
			return SbmGlobals.System.CreateAccountMgr(UserContext);
		}

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