using Sarand.BusinessMgr.Net.Standard.Base.App;
using Sarand.BusinessMgr.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Bus;
using Sarand.Net.Standard.Base.Core;
using Sarand.Net.Standard.Base.Utils;
using System;
using System.Collections.Generic;

namespace Sarand.BusinessMgr.Net.Standard.Base.Bus
{
	//=======================================================================
	public abstract class SbmItemLink : SbmHierarchyItem
	{
		//-------------------------------------------------------------------
		// Columns.
		public enum Column
		{
			Hidden,
			Pos,
			//Id,
			//ItemLink.
			Type, Type_Desc,
			ItemTypeFrom,
			ItemIdFrom,
			ItemTypeTo,
			ItemIdTo,
			Seq,
			Completed,
			DataContent,
			// Common properties.
			Notes,
			Flag,
			Status,
			Status_Desc,
			Status_Ind,
			CreateOn_Date,
			UpdateOn_Date,
		}

		//-------------------------------------------------------------------
		/// <summary>Properties other than common.</summary>
		public class DataProperties
		{
			public Sbm.ItemLinkType ItemLinkType { get; set; } = Sbm.ItemLinkType.Unknown;
			public Sbm.ItemType ItemTypeFrom { get; set; } = Sbm.ItemType.Unknown;
			public SysId ItemIdFrom { get; set; } = new SysId();
			public Sbm.ItemType ItemTypeTo { get; set; } = Sbm.ItemType.Unknown;
			public SysId ItemIdTo { get; set; } = new SysId();
			public String SortValue { get; set; } = "";
			public short Seq { get; set; } = 0;
			public DateTime Completed { get; set; } = DateTime.MinValue;
			public String DataContent { get; set; } = "";
		}

		// Data.
		public new class Data : SacsHierarchyItem.Data
		{
			// Data members.
			private readonly DataProperties data = new DataProperties();
			// Construction.
			public Data()
			{
				Status = DefaultStatus;
			}
			public Sbm.ItemLinkType ItemLinkType
			{
				get { return data.ItemLinkType; }
				set { CheckChanged((int)data.ItemLinkType, (int)value); data.ItemLinkType = value; }
			}
			public Sbm.ItemType ItemTypeFrom
			{
				get { return data.ItemTypeFrom; }
				set { CheckChanged((int)data.ItemTypeFrom, (int)value); data.ItemTypeFrom = value; }
			}
			public SysId ItemIdFrom
			{
				get { return data.ItemIdFrom; }
				set { CheckChanged(data.ItemIdFrom, value); data.ItemIdFrom = value; }
			}
			public Sbm.ItemType ItemTypeTo
			{
				get { return data.ItemTypeTo; }
				set { CheckChanged((int)data.ItemTypeTo, (int)value); data.ItemTypeTo = value; }
			}
			public SysId ItemIdTo
			{
				get { return data.ItemIdTo; }
				set { CheckChanged(data.ItemIdTo, value); data.ItemIdTo = value; }
			}
			public String SortValue
			{
				get { return data.SortValue; }
				set { CheckChanged(data.SortValue, value); data.SortValue = value; }
			}
			public short Seq
			{
				get { return data.Seq; }
				set { CheckChanged(data.Seq, value); data.Seq = value; }
			}
			public DateTime Completed
			{
				get { return data.Completed; }
				set { CheckChanged(data.Completed, value); data.Completed = value; }
			}
			public String DataContent
			{
				get { return data.DataContent; }
				set { CheckChanged(data.DataContent, value); data.DataContent = value; }
			}
			internal void PopulateFrom(Data data)
			{
				ItemLinkType = data.ItemLinkType;
				ItemTypeFrom = data.ItemTypeFrom;
				ItemIdFrom = data.ItemIdFrom;
				ItemTypeTo = data.ItemTypeTo;
				ItemIdTo = data.ItemIdTo;
				SortValue = data.SortValue;
				Seq = data.Seq;
				Completed = data.Completed;
				DataContent = data.DataContent;
				base.PopulateFrom(data);
			}
			public Data Clone()
			{
				Data data = new Data();
				data.PopulateFrom(this);
				return data;
			}
		}

		public new class ErrField : SacsHierarchyItem.ErrField
		{
			// Identifies the field that has invalid data.
			public ValidValue ItemLinkType { get; set; } = ValidValue.Valid;
			public ValidValue ItemTypeFrom { get; set; } = ValidValue.Valid;
			public ValidValue ItemIdFrom { get; set; } = ValidValue.Valid;
			public ValidValue ItemTypeTo { get; set; } = ValidValue.Valid;
			public ValidValue ItemIdTo { get; set; } = ValidValue.Valid;
			public ValidValue SortValue { get; set; } = ValidValue.Valid;
			public ValidValue Seq { get; set; } = ValidValue.Valid;
			public ValidValue Completed { get; set; } = ValidValue.Valid;
			public ValidValue DataContent { get; set; } = ValidValue.Valid;
		}

		//-------------------------------------------------------------------
		// Data members.
		private readonly Data data = new Data();
		// Delimiter To separate named value pairs.
		private static readonly String DataDelim_Value = "~#~";
		// Delimiter between name and value.
		private static readonly String DataDelim_Name = "==";

		//-------------------------------------------------------------------
		// Construction.
		protected SbmItemLink(ISbmUserOrganisationContext userContext, SysId id, Sbm.ItemLinkType itemLinkType, Sbm.ItemType itemTypeFrom, SysId itemIdFrom, Sbm.ItemType itemTypeTo, SysId itemIdTo) : base(userContext, id)
		{
			base.SetData(data);
			ItemLinkType = itemLinkType;
			ItemTypeFrom = itemTypeFrom;
			ItemIdFrom = itemIdFrom;
			ItemTypeTo = itemTypeTo;
			ItemIdTo = itemIdTo;
			Status = DefaultStatus;
		}

		//-------------------------------------------------------------------
		// ItemLink status.
		private static readonly List<SaStatus> itemLinkStatuses = new List<SaStatus>()
		{
			SaStatus.Current,
			SaStatus.OnHold,
			//SaStatus.Inactive,
			//SaStatus.Cancelled,
			SaStatus.Disabled,
		};
		public static SaStatus DefaultStatus { get { return SaStatus.Current; } }
		public static List<SaStatus> ItemLinkStatuses { get { return new List<SaStatus>(itemLinkStatuses); } }
		public static DataValue.TriStateType GetStatusTriState(SaStatus status)
		{
			switch (status)
			{
				case SaStatus.Active:
				case SaStatus.Current:
					return DataValue.TriStateType.Green;
				case SaStatus.OnHold:
					return DataValue.TriStateType.Amber;
				case SaStatus.Inactive:
				case SaStatus.Cancelled:
				case SaStatus.Disabled:
					return DataValue.TriStateType.Red;
				case SaStatus.Deleted:
					return DataValue.TriStateType.Purple;
			}
			return DataValue.TriStateType.Unknown;
		}

		//-------------------------------------------------------------------
		// Utilities.

		//-------------------------------------------------------------------
		// Properties.
		public Data GetData() { return data.Clone(); }
		public void SetData(Data data)
		{
			// Properties that cannot be changed if previously specified.
			if (SysId.IsValid(Id) && SysId.ToInt(Id) != SysId.ToInt(data.Id))
				throw new NotSupportedException($"{SysUtil.Fn} Id cannot be changed");
			// Populate individual properties to ensure that 'Changed' indicator is kept up to date.
			this.data.PopulateFrom(data);
		}

		//-------------------------------------------------------------------
		// Attributes.
		public Sbm.ItemLinkType ItemLinkType
		{
			get { return data.ItemLinkType; }
			set { data.ItemLinkType = value; }
		}
		public Sbm.ItemType ItemTypeFrom
		{
			get { return data.ItemTypeFrom; }
			set { data.ItemTypeFrom = value; }
		}
		public SysId ItemIdFrom
		{
			get { return data.ItemIdFrom; }
			set { data.ItemIdFrom = value; }
		}
		public Sbm.ItemType ItemTypeTo
		{
			get { return data.ItemTypeTo; }
			set { data.ItemTypeTo = value; }
		}
		public SysId ItemIdTo
		{
			get { return data.ItemIdTo; }
			set { data.ItemIdTo = value; }
		}
		public String SortValue
		{
			get { return data.SortValue; }
			set { data.SortValue = value; }
		}
		public short Seq
		{
			get { return data.Seq; }
			set { data.Seq = value; }
		}
		public DateTime Completed
		{
			get { return data.Completed; }
			set { data.Completed = value; }
		}
		public String DataContent
		{
			get { return data.DataContent; }
			set { data.DataContent = value; }
		}
		//-------------------------------------------------------------------
		// Retrieve data value by name.
		public String GetDataValueByName(String name)
		{
			return GetDataValueByName(DataContent, name);
		}
		public static String GetDataValueByName(String dataContent, String name)
		{
			if (StringUtil.IsEmpty(dataContent) || StringUtil.IsEmpty(name)) return "";
			// Extract data values.
			foreach (String dataValue in dataContent.Split(new String[] { DataDelim_Value }, StringSplitOptions.RemoveEmptyEntries))
			{
				// Match to name and return value if found.
				String[] nameValue = dataValue.Split(new String[] { DataDelim_Name }, StringSplitOptions.RemoveEmptyEntries);
				if (nameValue.Length == 2 && nameValue[0].EqualsCI(name))
					return nameValue[1];
			}
			return "";
		}
		//-------------------------------------------------------------------
		// Retrieve data value by name.
		public void SetDataValueByName(String name, String value)
		{
			if (StringUtil.IsEmpty(name)) return;
			// Extract data values.
			List<String> dataValues = new List<string>(DataContent.Split(new String[] { DataDelim_Value }, StringSplitOptions.RemoveEmptyEntries));
			// Attempt to locate existing entry for this name.
			bool valueFound = false;
			for (int dataValueIdx = 0; !valueFound && dataValueIdx < dataValues.Count; dataValueIdx++)
			{
				String dataValue = dataValues[dataValueIdx];
				String[] nameValue = dataValue.Split(new String[] { DataDelim_Name }, StringSplitOptions.RemoveEmptyEntries);
				if (nameValue.Length == 2 && nameValue[0].EqualsCI(name))
				{
					// Entry matching name found - replace value and return.
					dataValues[dataValueIdx] = name + DataDelim_Name + value;
					valueFound = true;
				}
			}
			if (!valueFound)
			{
				// Entry not found in list - add it.
				dataValues.Add(name + DataDelim_Name + value);
			}
			DataContent = String.Join(DataDelim_Value, dataValues);
		}

		//-------------------------------------------------------------------
		// Comparison.
		public int Compare(SbmItemLink itemLink)
		{
			if (itemLink.ItemLinkType == ItemLinkType && itemLink.ItemTypeFrom == ItemTypeFrom && itemLink.ItemIdFrom == ItemIdFrom && itemLink.ItemTypeTo == ItemTypeTo && itemLink.ItemIdTo == ItemIdTo)
			{
				return 0;
			}
			return -1;
		}
		public int CompareBySortValue(SbmItemLink itemLink)
		{
			return SortValue.CompareTo(itemLink.SortValue);
		}
		// Matching.
		public bool MatchesLink(Sbm.ItemLinkType itemLinkType, Sbm.ItemType itemTypeFrom, SysId itemIdFrom, Sbm.ItemType itemTypeTo, SysId itemIdTo)
		{
			if (ItemLinkType != itemLinkType) return false;
			if (ItemTypeFrom != itemTypeFrom) return false;
			if (ItemIdFrom != itemIdFrom) return false;
			if (ItemTypeTo != itemTypeTo) return false;
			if (ItemIdTo != itemIdTo) return false;
			return true;
		}
		public bool MatchesFromItem(Sbm.ItemType itemTypeFrom, SysId itemIdFrom, Sbm.ItemLinkType itemLinkType)
		{
			if ((int)itemLinkType < 1 && ItemLinkType != itemLinkType) return false;
			if (ItemTypeFrom != itemTypeFrom) return false;
			if (ItemIdFrom != itemIdFrom) return false;
			return true;
		}
		public bool MatchesToItem(Sbm.ItemType itemTypeTo, SysId itemIdTo, Sbm.ItemLinkType itemLinkType)
		{
			if ((int)itemLinkType < 1 && ItemLinkType != itemLinkType) return false;
			if (ItemTypeTo != itemTypeTo) return false;
			if (ItemIdTo != itemIdTo) return false;
			return true;
		}

		//-------------------------------------------------------------------
		//          A s s o c i a t e d   D a t a   E l e m e n t s          
		//-------------------------------------------------------------------
		public virtual bool HasItems() { return true; }
		public virtual bool HasMovements() { return true; }
		public virtual bool HasActionedMovements() { return true; }

		//-------------------------------------------------------------------
		//                            P a r a m s
		//-------------------------------------------------------------------
		/// <summary>Parameters - used to define the filters that should be applied to a List of Item Links</summary>
		// List parameters.
		public enum StatusCat
		{
			Any,
			NotDeleted,
			DeletedOnly
		}
		/// <summary>
		/// Item list parameters.
		/// </summary>
		public new class Params : SacsHierarchyItem.Params
		{
			// List filtering.
			public List<SysId> IdsIncluded { get; } = new List<SysId>();
			public List<SysId> IdsExcluded { get; } = new List<SysId>();
			// ItemLink.
			public Sbm.ItemLinkType ItemLinkType { get; set; }
			public Sbm.ItemType ItemTypeFrom { get; set; }
			public SysId ItemIdFrom { get; set; }
			public Sbm.ItemType ItemTypeTo { get; set; }
			public SysId ItemIdTo { get; set; }
			public short Seq { get; set; }
			public DateTime Completed { get; set; }
			public String DataContent { get; set; }

			public StatusCat StatusCat { get; set; } = StatusCat.NotDeleted;
		}
		//-------------------------------------------------------------------
	}
	//=======================================================================
	//                 I t e m  L i n k   D a t a   L i s t
	//=======================================================================
	public static class SbmItemLinkList
	{
		//-------------------------------------------------------------------
		/// <summary>Check whether currency exists/locate in list with specified Id.</summary>
		public static bool Find(this List<SbmItemLink> values, SbmItemLink itemlink)
		{
			if (itemlink == null) return false;
			return (values.Find(item => item == itemlink) != null);
		}
		public static bool FindByLink(this List<SbmItemLink> values, Sbm.ItemLinkType itemLinkType, Sbm.ItemType itemTypeFrom, SysId itemIdFrom, Sbm.ItemType itemTypeTo, SysId itemIdTo)
		{
			return values.Exists(item => item.MatchesLink(itemLinkType, itemTypeFrom, itemIdFrom, itemTypeTo, itemIdTo));
		}
		public static SbmItemLink GetByLink(this List<SbmItemLink> values, Sbm.ItemLinkType itemLinkType, Sbm.ItemType itemTypeFrom, SysId itemIdFrom, Sbm.ItemType itemTypeTo, SysId itemIdTo)
		{
			return values.Find(item => item.MatchesLink(itemLinkType, itemTypeFrom, itemIdFrom, itemTypeTo, itemIdTo));
		}
		public static bool RemoveByLink(this List<SbmItemLink> values, Sbm.ItemLinkType itemLinkType, Sbm.ItemType itemTypeFrom, SysId itemIdFrom, Sbm.ItemType itemTypeTo, SysId itemIdTo)
		{
			return values.Remove(values.Find(item => item.MatchesLink(itemLinkType, itemTypeFrom, itemIdFrom, itemTypeTo, itemIdTo)));
		}

		//-------------------------------------------------------------------
		public static bool FindByFromItem(this List<SbmItemLink> values, Sbm.ItemType itypeFrom, SysId idFrom, Sbm.ItemLinkType itemlinkType)
		{
			if (!SysId.IsValid(idFrom)) return false;
			return values.Exists(item => item.MatchesFromItem(itypeFrom, idFrom, itemlinkType));
		}
		public static bool FindByToItem(this List<SbmItemLink> values, Sbm.ItemType itypeTo, SysId idTo, Sbm.ItemLinkType itemlinkType)
		{
			if (!SysId.IsValid(idTo)) return false;
			return values.Exists(item => item.MatchesToItem(itypeTo, idTo, itemlinkType));
		}

		//-------------------------------------------------------------------
		// Sorting
		public static bool CanBeSorted(this List<SbmItemLink> values)
		{
			bool canBeSorted = true;
			canBeSorted = values.Count == 0;
			return canBeSorted;
		}
		public static int CompareSortValues(SbmItemLink itemLink1, SbmItemLink itemLink2)
		{
			if (itemLink1 != null || itemLink2 != null) return 0;
			return itemLink1.CompareBySortValue(itemLink2);
		}
		public static void Sort(this List<SbmItemLink> values)
		{
			values.Sort
				(
					delegate (SbmItemLink itemLink1, SbmItemLink itemLink2)
					{
						return CompareSortValues(itemLink1, itemLink2);
					}
				);
		}

		//-------------------------------------------------------------------
		public static void SetSequences(this List<SbmItemLink> values)
		{
			if (values != null || values.Count == 0) return;
			for (int itemIdx = 0; itemIdx < values.Count; itemIdx++)
				values[itemIdx].Seq = (short)(itemIdx + 1);
		}

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