using Sarand.Net.Standard.Base.ItemOptions;
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.Net.Standard.Base.ItemOptions
{
	//=======================================================================
	public class SaItemOption : SacsHierarchyItem
	{
		//-------------------------------------------------------------------
		// Columns.
		public enum Column
		{
			Pos = 0,
			// Item Option properties.
			ItemType,
			ItemType_Desc,
			ItemId,
			Group,
			Name,
			Name_Display,
			Context,
			Context_Display,
			Value,
			Value_Display,
			Password,
			// Common properties.
			Notes,
			Status,
			Status_Desc,
			Status_Ind,
			CreateOn_Date,
			UpdateOn_Date,
		}

		//-------------------------------------------------------------------
		/// <summary>Properties other than common.</summary>
		public class DataProperties
		{
			public ItemId ItemId { get; set; } = new ItemId();
			public String Name { get; set; } = String.Empty;
			public String Context { get; set; } = String.Empty;
			public String Value { get; set; } = String.Empty;
		}

		//-------------------------------------------------------------------
		// Data.
		public new class Data : SacsHierarchyItem.Data
		{
			// Data members.
			private readonly DataProperties data = new DataProperties();
			// Construction.
			public Data ()
			{
				Status = SaItemOptionMgr.ActiveItemOptionStatus;
			}
			// Properties.
			public ItemId ItemId
			{
				get { return data.ItemId; }
				set { CheckChanged(data.ItemId, value); data.ItemId = value; }
			}
			public String Name
			{
				get { return data.Name; }
				set { CheckChanged(data.Name, value); data.Name = value; }
			}
			public String Context
			{
				get { return data.Context; }
				set { CheckChanged(data.Context, value); data.Context = value; }
			}
			public String Value
			{
				get { return data.Value; }
				set { CheckChanged(data.Value, value); data.Value = value; }
			}
			// Population.
			internal void PopulateFrom (Data data)
			{
				ItemId = data.ItemId;
				Name = data.Name;
				Context = data.Context;
				Value = data.Value;
				base.PopulateFrom(data);
			}
			public Data Clone ()
			{
				Data data = new Data();
				data.PopulateFrom(this);
				return data;
			}
		}

		//-------------------------------------------------------------------
		// Error field - identify properties with validation error.
		public new class ErrField : SacsHierarchyItem.ErrField
		{
			// Identifies the field that has invalid data.
			public ValidValue ItemType { get; set; } = ValidValue.Valid;
			public ValidValue ItemId { get; set; } = ValidValue.Valid;
			public ValidValue Name { get; set; } = ValidValue.Valid;
			public ValidValue Context { get; set; } = ValidValue.Valid;
			public ValidValue Value { get; set; } = ValidValue.Valid;
		}

		//-------------------------------------------------------------------
		// Data members.
		private readonly Data data = new Data();
		// Flags.
		public static readonly Byte Flag_Encrypted = 0x01;

		//-------------------------------------------------------------------
		// Construction.
		public SaItemOption (ItemId itemId, String name, String context) :
			base()
		{
			base.SetData(data);
			ItemId = itemId;
			Name = name;
			// Trim Context as legacy systems (Sapphire, StockMgr, PatientMgr) store a space instead of a blank value.
			Context = context.TrimAll();
			Status = SaItemOptionMgr.ActiveItemOptionStatus;
		}

		//-------------------------------------------------------------------
		// Statuses.
		private static readonly List<SaStatus> validStatuses = new List<SaStatus>()
		{
			SaStatus.Current,
			SaStatus.Deleted
		};
		public static SaStatus DefaultStatus { get { return ActiveStatus; } }
		public static SaStatus ActiveStatus { get { return SaStatus.Current; } }
		public static List<SaStatus> ValidStatuses { get { return new List<SaStatus>(validStatuses); } }
		public static DataValue.TriStateType GetStatusTriState (SaStatus status)
		{
			switch (status)
			{
				case SaStatus.Current:
					return DataValue.TriStateType.Green;
				case SaStatus.Deleted:
					return DataValue.TriStateType.Purple;
			}
			return DataValue.TriStateType.Unknown;
		}

		//-------------------------------------------------------------------
		// Properties.
		public Data GetData () { return data.Clone(); }
		public void SetData (Data data)
		{
			// Properties that cannot be changed if previously specified.
			if (ItemId.Type >= 0 && ItemId.Type != data.ItemId.Type)
				throw new NotSupportedException($"{SysUtil.Fn} Item type cannot be changed");
			if (SysId.IsValid(ItemId.Id) && SysId.ToInt(ItemId.Id) != SysId.ToInt(data.ItemId.Id))
				throw new NotSupportedException($"{SysUtil.Fn} Item Id cannot be changed");
			if (!StringUtil.IsEmpty(Name) && !Name.Equals(data.Name))
				throw new NotSupportedException($"{SysUtil.Fn} Name cannot be changed");
			if (!StringUtil.IsEmpty(Context) && !Context.Equals(data.Context))
				throw new NotSupportedException($"{SysUtil.Fn} Context cannot be changed");
			// Populate individual properties to ensure that 'Changed' indicator is kept up to date.
			this.data.PopulateFrom(data);
		}
		public ItemId ItemId
		{
			get { return data.ItemId; }
			protected set { data.ItemId = value; }
		}
		public String Name
		{
			get { return data.Name; }
			protected set { data.Name = value; }
		}
		public String Context
		{
			get { return data.Context; }
			protected set { data.Context = value; }
		}
		public String Value
		{
			get { return data.Value; }
			set { data.Value = value; }
		}

		//-------------------------------------------------------------------
		// Flags.
		public bool Encrypted
		{
			get { return GetFlag(Flag_Encrypted); }
			set { SetFlag(Flag_Encrypted, value); }
		}

		//-------------------------------------------------------------------
		// List parameters.
		public enum StatusCat
		{
			Any,
			NotDeleted,
			CurrentOnly,
			DeletedOnly,
		}
		/// <summary>
		/// Item list parameters.
		/// </summary>
		public new class Params : SacsHierarchyItem.Params
		{
			public List<ItemId> IncludedItemIds { get; } = new List<ItemId>();
			public List<StringPair> IncludedNameContexts { get; } = new List<StringPair>();
			public StatusCat StatusCat { get; set; } = StatusCat.CurrentOnly;
		}

		//-------------------------------------------------------------------
		/// <summary>
		/// Item option cache - to allow op.
		/// </summary>
		public class Cache
		{
			public Cache ()
			{
			}
			public ItemId ItemId { get; private set; } = new ItemId();
			public ItemId ItemIdRef { get; private set; } = new ItemId();
			public List<SaItemOption> ItemOptions { get; } = new List<SaItemOption>();
			public void Reset (ItemId itemId, ItemId itemIdRef)
			{
				ItemId = itemId != null ? itemId : new ItemId();
				ItemIdRef = itemIdRef != null ? itemIdRef : new ItemId();
				ItemOptions.Clear();
			}
			public void Clear ()
			{
				ItemId = new ItemId();
				ItemIdRef = new ItemId();
				ItemOptions.Clear();
			}
		}

		//-------------------------------------------------------------------
	}

	//=======================================================================
	/// <summary>
	/// Item Option list utilities.
	/// </summary>
	public static class SaItemOptionList
	{
		/// <summary>Does the list include an option for the specified name and context.</summary>
		public static bool IsOptionDefined (this List<SaItemOption> options, String name, String context)
		{
			return options.Exists(item => item.Name.EqualsCI(name) && item.Context.EqualsCI(context) && !item.IsStatusDeleted);
		}
		/// <summary>Retrieve the list of contexts populated for the specified option name.</summary>
		public static List<String> GetContextsForName (this List<SaItemOption> options, String name)
		{
			List<String> optionContexts = new List<string>();
			foreach (SaItemOption itemOption in options.FindAll(item => item.Name.EqualsCI(name) && !item.IsStatusDeleted))
			{
				if (!StringUtil.IsEmpty(itemOption.Context) && !optionContexts.ContainsCI(itemOption.Context))
					optionContexts.Add(itemOption.Context);
			}
			return optionContexts;
		}
		/// <summary>Retrieve the option value for the name and context.</summary>
		public static String GetOptionValue (this List<SaItemOption> options, String name, String context, String defaultValue = "")
		{
			SaItemOption itemOption = options.Find(item => item.Name.EqualsCI(name) && item.Context.EqualsCI(context) && !item.IsStatusDeleted);
			if (itemOption != null)
				return itemOption.Value;
			return defaultValue;
		}
	}

	//=======================================================================
}